OM13320,598 - NXP Semiconductors

I2C-bus Components

Selection Guide

I2C-bus Components Selection Guide

Overview

By replacing complex parallel interfaces with a straightforward

yet powerful serial structure, the Inter-Integrated Circuit (I2C) bus

revolutionized chip-to-chip communications. The I2C-bus shrinks

integrated circuit (IC) footprints by reducing connection count,

leading to lower IC costs, which in turn simpliﬁes printed circuit

board (PCB) design complexity and reduces system cost. This bus

components selection guide provides an overview of NXP’s deep

I2C-bus solutions portfolio.

History

As electronic designs grew in complexity, a need developed for

an easy and more cost effective way to connect peripheral devic-

es to their controlling microprocessors. To meet this need, Philips

Semiconductors (now NXP Semiconductors) invented a simple

bidirectional 2-wire bus. Originally created over thirty years ago

for television applications, the I2C-bus has since become a de

facto industry standard supported by many companies.

I2C Features

The I2C-bus requires only two lines: a serial data line (SDA) and

a serial clock line (SCL). Each device connected to the bus is

software addressable by a unique address, and simple master/

slave relationships exist at all times.

Operation

Serial 8-bit bidirectional data transfers occur at up to 100kbit/s

in the Standard mode, up to 400kbit/s in Fast-mode (Fm), up to

1Mbit/sec in Fast-mode plus (Fm+), up to 3.4 Mbit/s in high-speed

mode (Hs), and up to 5 Mbits/s (unidirectional) in the new Ultra-

Fast-mode (UFm).

I2C Applications

Although originally designed to link a small number of devices lo-

cally, improvements to bus speed options and the introduction of

bus extension devices has allowed the use of the I2C-bus to grow

from applications such as cell phones and car radios to systems

spanning rooms and even buildings.

I2C Speciﬁcation

For the I2C-bus speciﬁcation and user manual, please visit:

http://www.nxp.com/documents/user_manual/UM10204.pdf

TABLE OF CONTENTS

Overview ................1

I2C-bus System Diagram ....2

General Purpose Input

Output (GPIO) Expanders....3

Thermal Sensors and

Voltage Management ......6

LCD Display Drivers........8

Clocks and

Real Time Clocks .........11

Tiny Serial Analog-to-Digital

and Digital-to-Analog

Converters ..............12

Multiplexers and Switches ...13

Bus Buffers and

Voltage Translators .......15

I2C-Controlled EEPROM,

RAM and DIP Switches

(multiplexed/latched

EEPROMS) ..............18

Intelligent Stepper

Motor Controller .........20

Bridge Integrated Circuits

and Bus Controllers .......21

Blinkers, Dimmers, Drivers

(LED Controllers) .........23

Capacitive Sensors .......25

Demo Boards............27

Resources...............28

Contact Information ......29

I2C-bus Components Selection Guide

I2C-bus System Diagram

NXP divides the I2C peripherals portfolio into twelve families, one for each of the most common, everyday

design concerns.

I2C-bus Components Selection Guide

General Purpose Input Output (GPIO) Expanders

As applications demand more control and monitoring

features, the General Purpose I/O (GPIO) ports

on microprocessors become more valuable. GPIO

expanders provide expansion capability for most

microprocessor families, allowing designers to save the

microprocessor GPIO for other important functions.

Features

All of NXP’s I2C GPIO expanders offer similar

functionality, and most have an /INT output, but several

also have a /RESET input or /RESET and /OE input.

Applications

• LED control

• Hardware control

monitors

• Humidity sensors

• System monitoring

• ACPI power switches

• Push buttons

• Fans

I2C-bus Components Selection Guide

Device # of

Outputs

Quasi

Output

Push-Pull

Output

Internal

Pull-up

Resistor/

Current Source

Vcc Range

(V)

I2C Max

Frequency

(kHz)

/OE Hardware

Reset

Interrupt

Output

2kbit

EEPROM

5-bit

Multiplex/

1-bit Latch

EEPROM

PCA9570 4Output Only 1.1 to 3.6 1000

PCA9536 4  2.3 to 5.5 400

PCA9537 42.3 to 5.5 400  

PCA9571 8Output Only 1.1 to 3.6 1000

PCA6408A 81.65 to 5.5 400  

PCA9538A 81.65 to 5.5 400  

PCA9554B(C) 8  1.65 to 5.5 400 

PCA9500 8  2.3 to 3.6 400 

PCA9501 8  2.3 to 3.6 400  

PCA9502 82.3 to 3.6 400  

PCA9557 82.3 to 5.5 400 

PCA9558 8 Open Drain 2.3 to 5.5 400  

PCA9670 8  2.3 to 5.5 1000 

PCA8574(A) 8  2.3 to 5.5 400 

PCA9534 82.3 to 5.5 400 

PCA9538 82.3 to 5.5 400  

PCA9554(A) 8  2.3 to 5.5 400 

PCA9672 8  2.3 to 5.5 1000  

PCA9674(A) 8  2.3 to 5.5 1000 

PCF8574(A) 8  2.5 to 6.0 100 

GPIO Expanders Selection Guide

I2C-bus Components Selection Guide

PCA6416A 16 1.65 to 5.5 400  

PCA9535A 16 1.65 to 5.5 400 

PCA9539A 16 1.65 to 5.5 400  

PCA9555A 16   1.65 to 5.5 400 

PCA9671 16   2.3 to 5.5 1000 

PCA8575 16   2.3 to 5.5 400 

PCA9535C 16 Open

Drain 2.3 to 5.5 400 

PCA9535 16 2.3 to 5.5 400 

PCA9539 16 2.3 to 5.5 400  

PCA9673 16   2.3 to 5.5 1000  

PCA9675 16   2.3 to 5.5 1000 

PCA9555 16   2.3 to 5.5 400 

PCF8575 16   2.5 to 5.5 400 

PCF8575C 16 Open Drain 4.5 to 5.5 400 

PCA9505 40   2.3 to 5.5 400   

PCA9506 40 2.3 to 5.5 400   

PCA9698 40 Open Drain 2.3 to 5.5 1000   

Device # of

Outputs

Quasi

Output

Push-Pull

Output

Internal

Pull-up

Resistor/

Current Source

Vcc Range

(V)

I2C Max

Frequency

(kHz)

/OE Hardware

Reset

Interrupt

Output

2kbit

EEPROM

5-bit

Multiplex/

1-bit Latch

EEPROM

Device # of

Outputs

Quasi

Output

Push-

Pull

Output

Internal

Pull-up

Resistor/

Current

Source

Vcc Range

(V)

I2C Max

Frequency

(kHz)

Hardware

Reset

Interrupt

Status

Interrupt

Output

Voltage

Translating

Capability

PCAL6408A 8 Open Drain   1.65 to 5.5 400    

PCAL9538A 8 Open Drain   1.65 to 5.5 400   

PCAL9554B(C) 8 Open Drain   1.65 to 5.5 400  

PCAL6416A 16 Open Drain   1.65 to 5.5 400    

PCAL9535A 16 Open Drain   1.65 to 5.5 400  

PCAL9539A 16 Open Drain   1.65 to 5.5 400   

PCAL9555A 16 Open Drain   1.65 to 5.5 400  

GPIO Expanders Agile I/O Selection Guide

Unique “Agile I/O” Features

Incorporating many highly useful functions commonly added in system applications, the new I2C Agile I/O expanders

offer the following standard integrated hardware features:

• An interrupt pin that reports back to the control processor when an input has changed state

• A hardware reset pin to return the device to its default state without powering down the part

• Two power-supply pins to enable simple level-shifting between different voltage domains (PCA(L)64XX only)

I2C-bus Components Selection Guide

NXP’s low-voltage translating I/O expander is

the solution.

This part provides additional I/O while keeping

interconnections to a minimum.

It also simpliﬁes interconnection of processors

running at one voltage level to I/O devices

operating at a different voltage level.

PCAL6416A

GPIO

FEATURES

`16-bit general purpose I/O expansion

`400 MHz Fast mode I2C-bus

`Independent operating supply voltage of 1.65 V to

5.5 V for both I/O and I2C-bus interface

`Bidirectional voltage-level translation and

GPIO expansion

`Schmitt trigger action for slow input transition and

better switching noise immunity at SCL/SDA inputs

`Latched outputs for directly driving LEDs

`Low standby current consumption

Need a Simple, Low-cost Way to

Add I/O and Voltage Level Shifting

to your I2C Design?

In addition, the Agile I/O expanders include important software-programmable features, including:

• A latched input to retain the input state

• Internal pull-up and pull-down resistors (PCA9554B(C) and PCA9555A default pull-up ON)

• An interrupt mask which reduces interrupt trafﬁc to the microcontroller and improves interrupt service response

• Interrupt register reports to identify which input actually caused an interrupt

• An output drive strength control to minimize system noise when multiple outputs switch simultaneously

I2C-bus Components Selection Guide

Thermal Sensors and Voltage Management

NXP offers a wide range of temperature sensors to support system reliability and enhance performance. Sensor

options include: local-only, local and remote, and serial presence detect (SPD).

Features

• Wide supply range coverage (1.7 to 5.5V)

• Wide operating temperature range (-55 to 125 ˚C)

• Low power and standby current

• Programmable temperature set points

• Standby mode and one-shot conversion

• Programmable fault queue

• One remote channel

• One thermal alarm output

Applications

• Desktop and notebook computers

• Servers

• Power supplies

• Enterprise communication

Thermal Sensors and Voltage Management Selection Guide

Device

Fan

Control

Output

Local Sensing

Accuracy (˚C)

Remote Sensing

Accuracy (˚C)

A/D

Resolution

(˚C/#bits)

Supply Range (V)

Supply

Operating

Current

(µA)

Supply Operating

Current (µA)

(typical 25° C/max 125° C)

Package

Options

PCT1075 ±0.5 0.0625/12 2.7 to 5.5 400 < 0.1/20

SO-8

TSSOP-8

HWSON-8

TSOP6

SE98A ±1 0.125/11 1.7 to 3.6 400 < 0.1/5 TSSOP-8

HWSON-8

PCT2075 ±1 0.125/11 2.7 to 5.5 400 < 0.1/20

SO-8

TSSOP-8

HWSON-8

TSOP6

SE95 ±1 0.03125/13 2.8 to 5.5 1000 < 7.5/NA

SO-8

TSSOP-8

WAFER

SE97B ±1 0.125/11 3.0 to 3.6 400 < 0.1/10 HWSON-8

LM75A* ±2 0.125/11 2.8 to 5.5 1000 < 3.5/NA SO-8

TSSOP-8

LM75B ±2 0.125/11 2.8 to 5.5 300 < 0.2/1

SO-8

TSSOP-8

XSON-8

HWSON-8

SA56004 1 ±2 ±1 0.125/11 3.0 to 3.6 500 10/NA

SO-8

TSSOP-8

HVSON-8

NE1617A ±2 ±3 1.0/8 3.0 to 5.5 70 3/10 QSOP-8

*Not recommended for new designs, use LM75B or PCT2075 instead.

I2C-bus Components Selection Guide

NXP’s I2C-bus controlled

temperature sensors offer high-

resolution solutions for your

thermal management needs.

Ideally suited for personal

computers, industrial

controllers, and other electronic

equipment.

PCT2075

THERMAL

SENSOR

FEATURES

`Pin-for-pin replacement for industry standard

part LM75

`11-bit ADC with enhanced temperature

resolution of 0.125 °C

`Temperature accuracy of ±1 °C from -25 °C to

+100 and ±2 from -55 °C to +125 °C

`Power supply input range of 2.7–5.5 V

`Programmable temperature threshold and

hysteresis set points

`Shutdown mode for power conservation

`Small form factor packages

Precise Temperature Monitoring

Made Simple

I2C-bus Components Selection Guide

LCD Display Drivers

NXP offers a wide range of LCD Segment, Character and Graphic Drivers for

the most challenging applications in automotive, industrial, and consumer. All

latest NXP LCD drivers are speciﬁcally designed for — but not limited to —

driving high-contrast, true black background Vertical Alignment (VA) displays

which offer a very wide viewing angle. Automotive AEC-Q100 compliant

qualiﬁcation on a wide range of devices ensures highest robustness and

reliability under harshest conditions. Available as cased devices in a package

for Surface Mount Device (SMD) application or as bare die with gold bumps for Chip-On-Glass (COG) application.

Features

• Wide supply voltage range

• Wide VLCD voltage range

• Low power consumption

• Programmable multiplex rates

• Wide operating temperature range up to +105 ˚C

(selected devices)

• On-chip VLCD generation (charge pump)

(selected devices)

• On-chip VLCD temperature compensation

(selected devices)

• Programmable frame frequency (selected devices)

• AEC-Q100 compliant automotive qualiﬁcation

(selected devices)

LCD Segment Drivers

Applications

• Industrial

–e-meter (electricity, gas,

water)

–White goods

–Home appliance

–Test & measurement

systems

–Machine control systems

–Point of Sales (POS)

terminals

• Automotive

–Instrument cluster

–Climate control unit

–Car radio

–Tachographs

• Consumer

–Handheld electronics

–Battery operated

equipment

–General purpose display

modules

• Medical and health care

Device

Max

number

elements

Number of elements at Multiplex Rate VDD VLCD Frame

Frequency

(Hz)

On-Chip

VLCD

Generation

(Charge

Pump)

On Chip VLCD

Temperature

Compensation

Tamb

Package AEC-Q100

compliant

MUX

1:1

MUX

1:2

MUX

1:3

MUX

1:4

MUX

1:6

MUX

1:8

MUX

1:9

[min]

(V)

[max]

(V)

[min]

(V)

[max]

(V)

[min]

(°C)

[max]

(°C)

PCF85162T 128 32 64 96 128 1.8 5.5 2.5 6.5 82 N N -40 85 TSSOP48 N

PCA85162T 128 32 64 96 128 1.8 5.5 2.5 8 110 N N -40 95 TSSOP48 Y

PCF85176T 160 40 80 120 160 1.8 5.5 2.5 6.5 82 N N -40 85 TSSOP56 N

PCA85176T 160 40 80 120 160 1.8 5.5 2.5 8 82 N N -40 95 TSSOP56 Y

PCF85176H 160 40 80 120 160 1.8 5.5 2.5 6.5 82 N N -40 85 TQFP64 N

PCA85176H 160 40 80 120 160 1.8 5.5 2.5 8 82 N N -40 95 TQFP64 Y

PCF85134HL 240 60 120 180 240 1.8 5.5 2.5 6.5 82 N N -40 85 LQFP80 N

PCA85134H 240 60 120 180 240 1.8 5.5 2.5 8 82 N N -40 95 LQFP80 Y

PCF8536AT 320 176 252 320 1.8 5.5 2.5 9 60-3001N N -40 85 TSSOP56 N

PCA8536AT 320 176 252 320 1.8 5.5 2.5 9 60-3001N N -40 95 TSSOP56 Y

PCF8537AH 352 44 88 176 276 352 1.8 5.5 2.5 9 60-3001Y Y -40 85 TQFP64 N

PCA8537AH 352 44 88 176 276 352 1.8 5.5 2.5 9 60-3001Y Y -40 95 TQFP64 Y

PCA9620H 480 60 120 240 320 480 2.5 5.5 2.5 9 60-3001Y Y -40 105 LQFP80 Y

PCA9620U 480 60 120 240 320 480 2.5 5.5 2.5 9 60-3001Y Y -40 105 Bare die Y

PCF8576DU 160 40 80 120 160 1.8 5.5 2.5 6.5 77 N N -40 85

Gold-

bumped

die,

bare die

PCA8576DU 160 40 80 120 160 1.8 5.5 2.5 6.5 77 N N -40 85

Gold-

bumped

die

1. SW programmable. 2. HW selectable. 3. Release H1 2013. 4. Release H2 2013.

I2C-bus Components Selection Guide

PCA8576FU4160 40 80 120 160 1.8 5.5 2.5 6.5 200 N N -40 95

Gold-

bumped

die

PCF85133U 320 80 160 240 320 1.8 5.5 2.5 6.5 82/1102N N -40 85

Gold-

bumped

die

PCA85133U 320 80 160 240 320 1.8 5.5 2.5 8 82/1102N N -40 95

Gold-

bumped

die

PCA85233U4320 80 160 240 320 1.8 5.5 2.5 8 150/2202N N -40 95

Gold-

bumped

die

PCF85132U 640 160 320 480 640 1.8 5.5 1.8 8 60-901N N -40 85

Gold-

bumped

die

PCA85132U 640 160 320 480 640 1.8 5.5 1.8 8 60-901N N -40 95

Gold-

bumped

die

PCA85232U 640 160 320 480 640 1.8 5.5 1.8 8 117-1761N N -40 95

Gold-

bumped

die

PCF8538U3918 102 204 408 612 816 918 2.5 5.5 4 12 45-3001Y Y -40 85

Gold-

bumped

die

PCA8538U3918 102 204 408 612 816 918 2.5 5.5 4 12 45-3001Y Y -40 105

Gold-

bumped

die

Device

Max

number

elements

Number of elements at Multiplex Rate VDD VLCD Frame

Frequency

(Hz)

On-Chip

VLCD

Generation

(Charge

Pump)

On Chip VLCD

Temperature

Compensation

Tamb

Package AEC-Q100

compliant

MUX

1:1

MUX

1:2

MUX

1:3

MUX

1:4

MUX

1:6

MUX

1:8

MUX

1:9

[min]

(V)

[max]

(V)

[min]

(V)

[max]

(V)

[min]

(°C)

[max]

(°C)

Device

Number of Lines

Number of

Characters

Number

of Icons

Character

Set

VDD1 VDD2 VLCD Frame

Frequency

(Hz)

On-Chip VLCD

Generation

(Charge Pump)

On Chip VLCD

Temperature

Compensation

Tamb

Package AEC-Q100

compliant

[min]

(V)

[max]

(V)

[min]

(V)

[max]

(V)

[min]

(V)

[max]

(V)

[min]

(°C)

[max]

(°C)

PCF2113AU 1 x 24 2 x 12 120 A 1.8 5.5 2.2 4 2.2 6.5 95 Y Y -40 85 Gold-bumped die N

PCF2113DU 1 x 24 2 x 12 120 D 1.8 5.5 2.2 4 2.2 6.5 95 Y Y -40 85 Gold-bumped die N

PCF2113EU 1 x 24 2 x 12 120 E 1.8 5.5 2.2 4 2.2 6.5 95 Y Y -40 85 Gold-bumped die N

PCF2113WU 1 x 24 2 x 12 120 W 1.8 5.5 2.2 4 2.2 6.5 95 Y Y -40 85 Gold-bumped die N

PCF2116AU 1 x 24 2 x 24 4 x 12 A 2.5 6 2.5 6 3.5 9 65 Y N -40 85 Gold-bumped die N

PCF2116CU 1 x 24 2 x 24 4 x 12 C 2.5 6 2.5 6 3.5 9 65 Y N -40 85 Gold-bumped die N

PCF2119AU 1 x 32 2 x 16 160 A 1.5 5.5 2.2 4 2.2 6.5 95 Y Y -40 85 Gold-bumped die N

PCF2119DU 1 x 32 2 x 16 160 D 1.5 5.5 2.2 4 2.2 6.5 95 Y Y -40 85 Gold-bumped die N

PCF2119FU 1 x 32 2 x 16 160 F 1.5 5.5 2.2 4 2.2 6.5 95 Y Y -40 85 Gold-bumped die N

PCF2119IU 1 x 32 2 x 16 160 I 1.5 5.5 2.2 4 2.2 6.5 95 Y Y -40 85 Gold-bumped die N

PCF2119RU 1 x 32 2 x 16 160 R 1.5 5.5 2.2 4 2.2 6.5 95 Y Y -40 85 Gold-bumped die N

PCF2119SU 1 x 32 2 x 16 160 S 1.5 5.5 2.2 4 2.2 6.5 95 Y Y -40 85 Gold-bumped die N

PCF2117RU21 x 40 2 x 20 200 R 2.5 5.5 2.5 5.5 4 16 45-3001Y Y -40 85 Gold-bumped die N

PCA2117RU21 x 40 2 x 20 200 R 2.5 5.5 2.5 5.5 4 16 45-3001Y Y -40 105 Gold-bumped die Y

PCF2117SU21 x 40 2 x 20 200 S 2.5 5.5 2.5 5.5 4 16 45-3001Y Y -40 85 Gold-bumped die N

PCA2117SU21 x 40 2 x 20 200 S 2.5 5.5 2.5 5.5 4 16 45-3001Y Y -40 105 Gold-bumped die Y

LCD Character Drivers

1. SW programmable. 2. HW selectable. 3. Release H1 2013. 4. Release H2 2013.

1. SW programmable. 2. Release H2 2013.

I2C-bus Components Selection Guide

Speciﬁcally designed for high-contrast, true black

background Vertical Alignment (VA) displays which

offer a very wide viewing angle.

Automotive AEC-Q100 compliant qualiﬁcation

for highest robustness and reliability under

harshest conditions.

Fully featured with on-chip VLCD generation and on-chip VLCD

temperature compensation.

`352-segment driver (44, 88, 176, 276 or 352 segments)

`Programmable frame frequency from 60 to 300Hz

`Extended VLCD supply voltage range to 9V

`On-chip VLCD generation (charge pump)

`On-chip VLCD temperature compensation

`Extended temperature range to +95 °C

`AEC-Q100 compliant

`TQFP64 package

Fully Featured LCD Drivers for High-Contrast

Vertical Alignment (VA) Displays

PCA8537

Device

Max Display

Resolution

Rows x Cols

Multiplex Rates

VDD1 VDD2 VLCD Frame

Frequency

(Hz)

On-Chip VLCD

Generation

(Charge Pump)

On Chip VLCD

Temperature

Compensation

Tamb

Package AEC-Q100

compliant

[min]

(V)

[max]

(V)

[min]

(V)

[max]

(V)

[min]

(V)

[max]

(V)

[min]

(°C)

[max]

(°C)

PCF8539U218 x 100 Mux 1:12; Mux 1:18 2.5 5.5 2.5 5.5 4 16 45-3001Y Y -40 85 Gold-bumped die N

PCA8539U218 x 100 Mux 1:12; Mux 1:18 2.5 5.5 2.5 5.5 4 16 45-3001Y Y -40 105 Gold-bumped die Y

PCF8531U 34 x 128 or

33 x 128 + 128 icons

Mux 1:17, Mux 1:26,

Mux 1:34 1.8 5.5 2.5 4.5 4 9 66 Y Y -40 85 Gold-bumped die N

PCF8811U 80 x 128 or

79 x 129 + 128 icons

Mux 1:16 to Mux 1:80 in

steps of 8 2 3.3 1.8 3.3 3 9 30-601Y Y -40 85 Gold-bumped die N

1. SW programmable. 2. Release H2 2013.

LCD Graphic Drivers

PCA8537

LCD DRIVER

FEATURES

I2C-bus Components Selection Guide

Clocks and Real Time Clocks

NXP offers a variety of real-time clocks to suit the many applications requiring accurate time keeping. Options include

ultra-low power, high-temperature tolerant, temperature compensated, and high-accuracy versions.

Features

• All addresses and data transferred serially via I2C-bus

Applications

• Mobile telephones • Electronic metering

• Portable instruments • Battery-powered products

Device Bus Feature

PCA8802 I2C Fm Ultra low power Smartcard; integrated counter for initiating one time password generation

PCF8523 I2C Fm+ Ultra low power with loss of main power detect and auto battery switch over

PCF8563 I2C Fm Ultra low power clock/calendar

PCF85063 I2C Fm Tiny RTC with 30s, 60s interrupt

PCF85063A I2C Fm Tiny RTC with alarm and 30s, 60s interrupt

PCA8565 I2C Fm High temperature (-40˚C – +125˚C) clock/calendar

PCF8583 I2C Clock/calendar resolution 0.01 s with 256x8 SRAM

PCF2127A I2C Fm High-accuracy, low-voltage with 512x8 RAM; temperature compensated

PCA/PCF2129(A) I2C Fm High accuracy; temperature compensated

Clocks and Real Time Clocks Selection Guide

NXP’s PCA2129 Real Time Clock provides precision

timekeeping for automotive, electronic metering, GPS

equipment, or any other application that requires

accurate process timing.

PCA2129

REAL TIME

CLOCK

FEATURES

`AEC-Q100 compliance for automotive applications

`Typical accuracy of ±3 ppm from -30 °C to +80 °C

`32.768 kHz quartz crystal and oscillator integrated into one

convenient package

`Battery backed output voltage and low battery detection

`Temperature compensated crystal oscillator with integrated capacitors

`Year, month, day, weekday, hours, minutes, seconds, and leap year correction

`Programmable interrupts and watchdog timer

`Clock operating voltage of 1.8 V to 4.2 V

Precision Timekeeping Doesn’t Have to

Consume Lots of Power

I2C-bus Components Selection Guide

Tiny Serial Analog-to-Digital and Digital-to-Analog Converters

I2C Analog-to-Digital (A/D) and Digital-to-Analog (A/D) converters provide a way to convert between digital and

analog signals and send the information via the I2C-bus.

Features

• Convert four different analog voltages to

digital values

• Transmit converted data on an I2C-bus for

processing by microprocessor/controller

• Generate one analog voltage output from 8-bit

digital value

Applications

• Record analog information such as temperature,

pressure, battery level, signal strength

• Convert from digital signals to analog voltages

for LCD contrast or buzzer control

Device A/D D/A # Bits I2C-bus Frequency Maximum Conversion Rate (kHz)

PCF8591   8 100 kHz 11

Tiny Serial ADC and DAC Selection Guide

NXP’s PCF8591 provides 8-bit digital-to-analog and

analog-to-digital conversion in a single chip, single

supply, low-power device.

PCF8591 A/D

AND D/A

CONVERTER

FEATURES

`8-bit CMOS data acquisition device using successive approximation

A/D conversion and multiplying D/A conversion

`4 analog inputs programmable as single-ended or differential

`1 analog output

`Serial input/output via I2C-bus

`Addressable via 3 hardware address pins

`Sampling rate given by I2C-bus speed

`Auto-incremented channel selection

`On-chip track and hold circuit

`Single operating supply voltage of 2.5 V to 6 V

Add Data Conversion Functionality

with Minimal Impact

I2C-bus Components Selection Guide

Multiplexers and Switches

I2C-bus multiplexers and switches provide capacitive isolation when connecting an upstream I2C-bus to a desired

combination of downstream buses. The software-controlled multiplexers and switches break the I2C-bus into two,

four, or eight sub-branches. Multiplexers allow selection of only one downstream branch at a time, while switches

allow selection of any individual downstream sub-branch or combination of downstream sub-branches.

Features

• Interrupt

• Hardware reset

• 2.3–5.5 V operating voltage

• 5 V tolerant input/outputs

• -40–85 ˚C operating temperature range

• 0–400 kHz operating frequency

• I2C and SMBus compatible

Applications

• Connection of I2C devices that operate at

different voltage levels but share a common bus

• Expanded ability to use multiple devices that

share a common I2C address

• Providing voltage level shifting

• Isolating devices when not in use to reduce overall system capacitive loading

Device Multiplexer

(In/Out)

Switch

(In/Out)

I2C-bus # of

Addresses

Interrupt

(IN-OUT)

Hardware

Reset

Packages

Pin Count SO

(Narrow)

(Wide) TSSOP XSON or

HVQFN

PCA9540B 1-2 1 8 D DP GD

PCA9541A 2-1 16 1-2 16 D PW BS

PCA9542A 1-2 8 2-1 14 D PW

PCA9543A/B11-2 4 2-1 14 D PW

PCA9544A 1-4 8 4-1 20 D PW BS

PCA9545A/B2 1-4 4 4-1 20 D PW BS

PCA9546A 1-4 8 16 D PW BS

PCA9547 1-8 8 24 D PW BS

PCA9548A 1-8 8 24 D PW BS

PCA964631-4 8 16 D PW

Multiplexers and Switches Selection Guide

1. PCA9543A and PCA9543B are identical except for the ﬁxed addresses allowing four of each version on the same bus

2. PCA9545A and PCA9545B are identical except for the ﬁxed addresses allowing four of each version on the same bus

3. No offset bus buffer isolates capacitance to each channel, operates to 1 MHz on Fm+ bus

I2C-bus Components Selection Guide

Avoid complete system redesign: address

capacity via bus switches.

NXP’s I2C-bus switches allow selection of

any downstream branch, even those

operating at different voltage levels.

Plus, they reduce overall system

capacitive loading by isolating devices

not currently in use.

PCA9545A

BUS SWITCH

FEATURES

Expand the Reach of your

I2C-based Application

`Voltage level translation between 1.8 V, 2.5 V, 3.3 V, and

5 V buses

`1-of-4 bidirectional translating switches

`0-400 kHz clock frequency

`5 V tolerant inputs

`Channel selection via I2C-bus, in any combination

`No glitch power-up

`Hot insertion support

`Power supply operating voltage range of 2.3 V to 5.5 V

I2C-bus Components Selection Guide

Bus Buffers and Voltage Translators

Bus buffers allow designers to expand use of the I2C-bus beyond the 400 pF maximum capacitive loading allowed by

the I2C speciﬁcation, allowing bidirectional communication without a direction pin.

Features

• Voltage translation

• Opto-electrical isolation

• Bus buffering

• Bus isolation/multiplexing

Applications

• Add more I2C or SMBus devices in the

same system

• Extend the reach of I2C or SMBus over longer distances

• Isolate an I2C or SMBus segment

• Translate voltage levels to allow devices with different voltage requirements to work on the same bus

• Electrically isolate the I2C-bus

• Support multi-point distribution of the I2C-bus

Device Type of Capacitance

Isolation Buffer Description I2C-bus (V)

(Left)

Iol (mA)

(Left)

I2C-bus (V)

(Right)

Iol (mA)

(Right)

# of

Pins

Typical

Distance

Level Translation

Capability

P82B715 None - Amplﬁer Fm HV bus extender 0 to 12V 3 0 to 12V 30 8 > 20 m None

PCA9510A Incremental Offset Fm hot-swap bus buffer (no RTA) 2.7 to 5.5V 3 2.7 to 5.5V 3 8 On Card None

PCA9511A Incremental Offset Fm hot swap-bus buffer 2.7 to 5.5V 3 2.7 to 5.5V 3 8 On Card None

PCA9512A Incremental Offset Fm VLT hot swap bus buffer 2.7 to 5.5V 3 2.7 to 5.5V 3 8 On Card 2 Supplies

PCA9513A Incremental Offset Fm hot-swap bus buffer (92 uA CS) 2.7 to 5.5V 3 2.7 to 5.5V 3 8 On Card None

PCA9514A Incremental Offset Fm hot-swap bus buffer (0.8 V offset) 2.7 to 5.5V 3 2.7 to 5.5V 3 8 On Card None

PCA9521 Incremental Offset 1 MHz HV Incremental

Offset bus buffer 1.3 to 10V 6 1.3 to 10V 6 8 < 3 m Over voltage tolerant

PCA9522 Incremental Offset 1 MHz HV hot-swap bus buffer 1.3 to 10V 6 1.3 to 10V 6 8 < 3 m Over voltage tolerant

PCA9525 No offset Buffer 1 MHz bus repeater 1.4 to 5.5V 4 1.4 to 5.5V 4 8 < 3 m None

PCA9605 No offset Buffer Fm+ bus repeater 1.4 to 5.5V 30 1.4 to 5.5V 30 8 < 20 m None

PCA9646 No offset Buffer 4-channel Fm+ buffer/switch

with RST 1.4 to 5.5V 30 1.4 to 5.5V 30 16 < 20 m None

P82B96 Static Offset Fm HV for long distance

and opto-isolation 3.2 to 15V 3 1.4 to 15V 30 8 > 20 m Over voltage tolerant

PCA9507 Static Offset Fm VLT DDC buffer with accelerator 2.7 to 5.5V 6 2.7 to 5.5V 6 8 < 20 m 2 Supplies

PCA9508 Static Offset Fm VLT hot-swap bus repeater 0.9 to 5.5V 6 2.7 to 5.5V 6 8 < 3 m 2 Supplies

PCA9509 Static Offset Fm 1.0V LV VLT with current source 1 to 4V 6 3 to 5.5V 6 8 < 3 m 2 Supplies

PCA9509A Static Offset Fm 0.8V LV VLT with current source 0.8 to 1.5V 6 2.3 to 5.5V 6 8 < 3 m 2 Supplies

PCA9509P Static Offset Fm 0.8V LV VLT bus buffer 0.8 to 1.5V 6 2.3 to 5.5V 6 8 < 3 m 2 Supplies

PCA9515A Static Offset Fm bus repeater 2.3 to 5.5V 6 2.3 to 5.5V 6 8 On Card Over voltage tolerant

PCA9516A Static Offset Fm 5-channel hub 2.3 to 5.5V 6 2.3 to 5.5V 6 16 On Card Over voltage tolerant

PCA9517A Static Offset Fm 0.9V LV VLT bus repeater 0.9 to 5.5V 6 2.7 to 5.5V 6 8 < 3 m 2 Supplies

Bus Buffers and Voltage Translators Selection Guide

I2C-bus Components Selection Guide

PCA9518A Static Offset Fm expandable 5-channel hub 2.3 to 5.5V 6 2.3 to 5.5V 6 20 On Card Over voltage tolerant

PCA9519 Static Offset 4-channel version of PCA9509 1 to 4V 6 3 to 5.5V 6 20 < 3 m 2 Supplies

PCA9527 Static Offset Fm DDC VLT with accelerator

and CEC 2.7 to 5.5V 6 2.7 to 3.6V 6 14 < 20 m 2 Supplies

PCA9600 Static Offset Fm+ HV for long distance

and opto-isolation 2.6 to 15V 3 1.6 to 15V 30 8 > 20 m Over voltage tolerant

PCA9601 Static Offset Fm+ HV with stronger 15 mA

local side drive 2.6 to 15V 15 1.6 to 15V 30 8 > 20 m Over voltage tolerant

PCA9617A Static Offset Fm+ 0.8V LV VLT bus repeater 0.8 to 5.5V 6 2.2 to 5.5V 6 8 < 3 m 2 Supplies

GTL2000 None - FET 22-bit Fm+ Voltage Level Translator 1 to 5.5V 64 1 to 5.5V 64 48 On Card Voltage Clamp

GTL2002 None - FET 2-bit Fm+ Voltage Level Translator 1 to 5.5V 64 1 to 5.5V 64 8 On Card Voltage Clamp

GTL2003 None - FET 8-bit Fm+ Voltage Level Translator 1 to 5.5V 64 1 to 5.5V 64 20 On Card Voltage Clamp

GTL2010 None - FET 10-bit Fm+ Voltage Level Translator 1 to 5.5V 64 1 to 5.5V 64 24 On Card Voltage Clamp

NVT2001 None - FET 1-bit Fm+ Voltage Level Translator 1 to 5.5V 64 1 to 5.5V 64 6 On Card Voltage Clamp

NVT2002 None - FET 2-bit Fm+ Voltage Level Translator 1 to 5.5V 64 1 to 5.5V 64 8 On Card Voltage Clamp

NVT2003 None - FET 3-bit Fm+ Level Translator for

two power supply 1 to 5.5V 64 1 to 5.5V 64 10 On Card Voltage Clamp

NVT2004 None - FET 4-bit Fm+ Voltage Level Translator 1 to 5.5V 64 1 to 5.5V 64 12 On Card Voltage Clamp

NVT2006 None - FET 6-bit Fm+ Voltage Level Translator 1 to 5.5V 64 1 to 5.5V 64 16 On Card Voltage Clamp

NVT2008 None - FET 8-bit Fm+ Voltage Level Translator 1 to 5.5V 64 1 to 5.5V 64 20 On Card Voltage Clamp

NVT2010 None - FET 10-bit Fm+ Voltage Level Translator 1 to 5.5V 64 1 to 5.5V 64 24 On Card Voltage Clamp

PCA9306 None - FET Dual I2C/SMBus Fm+ Voltage

Level Translator 1 to 5.5V 64 1 to 5.5V 64 8 On Card Voltage Clamp

Device Type of Capacitance

Isolation Buffer Description I2C-bus (V)

(Left)

Iol (mA)

(Left)

I2C-bus (V)

(Right)

Iol (mA)

(Right)

# of

Pins

Typical

Distance

Level Translation

Capability

Expand your reach with Bus Buffers from NXP.

Add more devices on the same system bus, extend

the bus over longer distances, or isolate segments of

the bus if necessary.

PCA9525

BUS BUFFER

FEATURES

`No offset allows communication with any other device and

multiple devices in series.

`Impedance isolating buffer function for 2-wire buses

`Fast switching times for operation > 1MHz

`4 mA maximum static open-drain, pull-down capability

`Input hysteresis for noise immunity

`Power supply operating voltage range of 2.7 V to 5.5 V

Got More Needs than Capability on

your I2C-bus-based System?

I2C-bus Components Selection Guide

Plug NXP’s PCA9522 Bus Buffer

into live backplanes without

causing data corruption.

Bring individual parts of your

system on-line successively using

the enable function, which

supports bus section isolation.

PCA9522

BUS BUFFER

FEATURES

Have Hot Insertion Needs for

Your Backplane?

`Dual, bidirectional, unity gain, isolating buffering

`Hot insertion logic to prevent data and clock bus corruption

in live backplane applications, speciﬁcally designed to

support Advanced TCA applications

`Support for I2C-bus Standard- and Fast-modes

`Enable function to allow bus segments to be disconnected

`Low noise susceptibility

`Support for connection of several buffers in series

`Voltage level shift capability from 1.8 V to 10 V

I2C-bus Components Selection Guide

I2C-Controlled EEPROM, RAM and DIP Switches

(multiplexed/latched EEPROMS)

Small-size serial memories (RAM and EEPROM) are

common and have wide applicability for data storage.

The multiplexed/latched EEPROMs may be used as

replacements for DIP switches or jumpers because the

settings can be easily changed via the I2C-bus without

having to power down equipment and open cabinets.

Features

• Retain data during power-off (except RAM)

• Address and data transferred serially via the I2C-bus

• Built-in word address register automatically increments

after each byte written or read (EEPROM)

• All bytes may be read in single operation (EEPROM)

• Up to 8 bytes can be written in one operation

(EEPROM)

Applications

• Meter readings

• Electronic key

• Product identiﬁcation numbers

• Serial presence detect

• DIP Switches

Device Power

Supply

Address

Pins

# of Blocks

(256 bytes) # of Bits

Temperature

Range

(˚C)

Clock

Frequency

(kHz)

PCF8570 2.5–6 V 3 1 2K -40 to +85 100

Device Power

Supply

Address

Pins

# of Blocks

(256 bytes) # of Bits

Data

Retention

(Years)

Temperature

Range

(˚C)

Clock

Frequency

(kHz)

PCF8582C-2 2.5–6 V 3 1 2K 10 -40 to +85 100

PCF85103C-2 2.5–6 V 3 1 2K 10 -40 to +85 100

PCF8594C-2 2.5–6 V 2 2 4K 10 -40 to +85 100

PCA24S08A 2.5–3.6 V 0 8 (128 Bytes) 8K 10 -40 to +85 400

PCA9500 2.5-3.6 V 3 1 2K 10 -40 to +85 400

PCA9501 2.5-3.6 V 6 1 2K 10 -40 to +85 400

Device # of Pins # of Non-volatile

Registers

# of

Bits

# of

Hardware

Input Pins

# of

Multiplexed

Outputs

Non-Multiplexed

Inputs

Data

Retention

Temperature

Range

(˚C)

Clock

Frequency

(kHz)

PCF8550 15 1 5 4 4 Yes 10 0 to 70 400

PCA9558 28 1 6 5 5 Yes 10 0 to 70 400

PCA9559 20 1 6 5 5 Yes 10 0 to 70 400

PCA9560 20 2 6 5 5 Yes 10 0 to 70 400

PCA9561 20 4 6 6 6 No 10 0 to 70 400

I2C-Controlled RAM Selection Guide

I2C-Controlled EEPROM Selection Guide

I2C-Controlled DIP Switches (Multiplexed/latched EEPROM) Selection Guide

I2C-bus Components Selection Guide

Move to I2C conﬁgurable, non-volatile

memory controlled settings with NXP’s

EEPROM DIP switches.

Set these switches easily via the I2C-bus,

controlled by the system microprocessor.

PCA9561

EEPROM

DIP SWITCH

FEATURES

Still Opening Cabinets and

Powering Down Equipment to

Change Manual Switches?

`6-bit 5-to-1 multiplexer DIP switch

`400 kHz maximum clock frequency

`Operating supply voltage of 3.0 V to 3.6 V

`5 V and 2.5 V tolerant inputs/outputs

`Selection of non-volatile registers via I2C-bus

I2C-bus Components Selection Guide

Intelligent Stepper Motor Controller

The PCA9629 provides all the logic and control required to drive a four-phase stepper motor via the I2C-bus.

Features

• Generate motor coil drive phase sequence signals with

four outputs for use with external high current drivers

to off-load CPU

• Four balanced push-pull type outputs capable

of sinking 25 mA or sourcing 25 mA for glueless

connection to external high current drivers needed to

drive motor coils

• Up to 1000 pF loads with 100 ns rise and fall times

• Sensor enabled drive control: linked to interrupt from

I/O pins

• Direction control of motor shaft

• Selectable active hold, power off or released states for

motor shaft

• Four general purpose I/Os:

–Conﬁgured to sense logic level outputs from optical

interrupter photo transistor circuit

–Conﬁgured as outputs to drive (source/sink) LEDs or

other loads up to 25 mA

–Programmable interrupt Mask Control for input pins

• Package offered: TSSOP16

Applications

• Car mirror control

• Automated door windows

• Printers

• Scanners

• Toys

• Robotics

NXP’s I2C-bus controlled, low-power-consumption stepper

motor controller provides highly ﬂexible operation.

Control step size, number of steps per command, number

of rotations, direction of rotation and more, all via I2C

programmable control registers.

PCA9629

STEPPER

MOTOR

FEATURES

`1 MHz Fast-mode Plus (Fm+) I2C-bus operation

`Built-in oscillator requires no external components

`Four balanced push-pull type outputs capable of sinking or sourcing 25 mA

`Drive capability of up to 1000 pF loads with 100 ns rise and fall times

`Programmable step rate of 344.8 kpps to 0.3 pps with ±5% accuracy

`Programmable rotation control

`Programmable watchdog timer

`Four general purpose I/O for sensing and signaling functions

`-40 °C to +85 °C operation

Stepper Motor Control Doesn’t Have to

Consume Valuable Microprocessor Cycles.

I2C-bus Components Selection Guide

Bridge Integrated Circuits and Bus Controllers

Bridge integrated circuits allow designers to connect together devices that use different serial buses. Bus controllers

serve as interfaces between most standard parallel bus microcontrollers/microprocessors and the serial I2C-bus, and

allow bidirectional communication between the parallel bus and the I2C-bus.

Features

• Operate at low voltages

• Consume little power

• Come in a variety of ultra-small package types

Applications

• Host processor communication with disparate serial, wireless, and GPIO interfaces

Device Bridge Type UARTs GPIO IrDA SIR Speed (Maximum) SPI Speed (Maximum) FIFO (Bytes) Oscillator

SC16IS740 I2C/SPI Slave to UART 1 0 115.2 Kbps 4 64

SC16IS741 I2C/SPI Slave to UART 1 115.2 Kbps 64

SC16IS750 I2C/SPI Slave to UART 1 8 115.2 Kbps 4 64

SC16IS752 I2C/SPI Slave to UART 2 8 115.2 Kbps 4 64

SC16IS760 I2C/SPI Slave to UART 1 8 1.152 Mbps 15 64

SC16IS762 I2C/SPI Slave to UART 2 8 1.152 Mbps 15 64

SC16IS850L 1.8V I2C/SPI Slave to UART 1 115.2 Kbps 128

SC18IS600 SPI Slave to I2C Master 4 1 Internal

SC18IS601 SPI Slave to I2C Master 3 3 External

SC18IS602B I2C/SPI Slave to SPI Master 4 1.8 Mbps Internal

SC18IM700 UART to I2C Master 8

Bridge Integrated Circuits Selection Guide

Device Type Voltage Range (V) Maximum I2C Frequency (kHz) Clock Source Parallel Interface Package

PCA9564 Parallel bus to I2C-bus

controller

2.3 to 3.6 with 5V

tolerance 360 Internal Fast

DIL-20

SO-20

TSSOP-20

HVQFN-20

PCA9661 Parallel bus to 1 channel

Fm+ I2C-bus controller

3 to 3.6V core

3 to 5.5V I/O 1000 Internal

(trimmed)

Fast with 4k Byte

Buffer LQFP48

PCA9663 Parallel bus to 3 channel

Fm+ I2C-bus controller

3 to 3.6V core

3 to 5.5V I/O 1000 Internal

(trimmed)

Fast with 4k Byte

Buffer LQFP48

PCA9665 Fm+ parallel bus to

I2C-bus controller

2.3 to 3.6 with 5V

tolerance 1000 Internal

(trimmed)

Fast with 68 Byte

Buffer

SO-20

TSSOP-20

HVQFN-20

PCA9665A Fm+ parallel bus to

I2C-bus controller

2.3 to 3.6 with 5V

tolerance 1000 Internal

(trimmed)

Fast with 68 Byte

Buffer TSSOP-20

PCF8584 I2C-bus controller 4.5 to 5.5 90 External Slow DIP-20

SO-20

PCU9661 Parallel bus to 1 channel

UFm I2C-bus controller

3 to 3.6V core

3 to 5.5V I/O 5000 Internal

(trimmed)

Fast with 4k Byte

Buffer LQFP48

Bus Controllers Selection Guide

I2C-bus Components Selection Guide

NXP’s advanced single master

mode I2C-bus controller supports

8-bit parallel bus to I2C-bus

protocol conversion.

Designed speciﬁcally for data

intensive I2C-bus transfers.

PCU9669

BUS

CONTROLLER

FEATURES

Transmitting Large Amounts

of Serial Data?

`Parallel bus to I2C-bus protocol conversion

`5 Mbit/s unidirectional data transfer on Ultra

Fast-mode (UFm) channel (push-pull driver)

`1 Mbit/s and up to 30 mA SCL/SDA IOL Fast-mode

Plus (Fm+) capability

`Individual 4352-byte buffers for the Fm+ and UFm

channels for a total of 13056 bytes of buffer space

`Internal oscillator trimmed to 1% accuracy to reduce

external component requirements

`SCL clock stretching support (Fm+ only)

`Operating supply voltage of 3.0 V to 3.6 V

`I2C-bus I/O supply voltage of 3.0 V to 5.5 V

PCU9668

Parallel bus to 2 channel

Fm+ and 1 channel UFm

I2C-bus controller

3 to 3.6V core

3 to 5.5 V I/O 5000 Internal

(trimmed)

Fast with 4k Byte

Buffer LQFP48

PCU9669

Parallel bus to 1 channel

Fm+ and 2 channel UFm

I2C-bus controller

3 to 3.6V core

3 to 5.5V I/O 5000 Internal

(trimmed)

Fast with 4k Byte

Buffer LQFP48

Device Type Voltage Range (V) Maximum I2C Frequency (kHz) Clock Source Parallel Interface Package

I2C-bus Components Selection Guide

Blinkers, Dimmers, Drivers (LED Controllers)

Designers commonly use LED controllers/drivers for blinking, dimming, and color mixing LEDs in I2C, SMBus, IPMI and

PMbus applications. Using separate I2C LED controllers limits bus trafﬁc and frees the I2C master for other purposes.

Features

• Any bits not used to drive an LED can be used as normal GPIO

(Dimmers/Blinkers)

• Industrial operating temperature range

• Low standby current

• Offered in a variety of package types

Applications

• Operating number displays such as 7-segment block

• Driving photo ﬂash LED in mobile phones and PDAs

Device # bits Type Feature Bus

PCA9530 2 LED Dimmer Programmable brightness I2C

PCA9531 8 LED Dimmer Programmable brightness I2C

PCA9532 16 LED Dimmer Programmable brightness I2C

PCA9533 4 LED Dimmer Programmable brightness I2C

PCA9550 2 LED Driver Programmable blink rates I2C

PCA9551 8 LED Driver Programmable blink rates I2C

PCA9552 16 LED Driver Programmable blink rates I2C

PCA9553 4 LED Driver Programmable blink rates I2C

Device # channels Feature Bus

PCA9622 16 100mA 40V Fm+ I2C

PCA9624 8 100mA 40V Fm+ I2C

PCA9626 24 100mA 40V Fm+ I2C

PCA9632 4 Low power Fm+ I2C

PCA9633 4Optimized for RGBA

color mixing Fm+ I2C

PCA9634 8Optimized for RGBA

color mixing Fm+ I2C

PCA9635 16 Optimized for RGBA

color mixing Fm+ I2C

PCA9685 16 PWM LED controller Fm+ I2C

PCU9654 8 100mA 40V UFm I2C

PCU9655 16 100mA 40V UFm I2C

PCU9656 24 100mA 40V UFm I2C

PCU9955 16 57 mA constant current UFm I2C

PCA9952 16 57 mA constant current Fm+ I2C

PCA9955 16 57 mA constant current Fm+ I2C

LED Dimmers/Blinkers Selection Guide LED RGB Color Mixers Selection Guide

Device Feature

SAA1064 4-digit LED driver

Device Feature

SSL3250A Dual LED 500mA Flash driver with Torch and Indicator Modes

SSL3252 Dual LED 500mA Flash driver with Torch and Indicator Modes

LED Segment Drivers Selection Guide

LED Flash Drivers Selection Guide

I2C-bus Components Selection Guide

Control blinking and dimming

of RGBA LEDs to support

status, display, backlight, or

amusement functions.

PCA9955

LED DRIVER

FEATURES

`16 LED drivers, each programmable for brightness,

dimming/blinking modes, and on/off states

`1 MHz Fast-mode Plus (Fm+) compatible

I2C-bus interface

`Four hardware addressable pins to support

16 devices connected to the same I2C-bus

`8 MHz internal oscillator requiring no

external components

`256-step programmable brightness, group

brightness, and group blinking

`Operating supply voltage of 3 V to 5.5 V

`-20 °C to +85 °C operation

Add Pizzazz to Your

Product with NXP’s Highly

Conﬁgurable LED Drivers

I2C-bus Components Selection Guide

Capacitive Sensors

The PCA8885 and PCF8885 integrated circuits are capacitive 8-channel proximity switches that use a patented

method to detect a change in capacitance on remote sensing plates.

Features

• Dynamic proximity switch with 8 sensor channels

• Support for matrix arrangement of sensors

• Sensing plates can be connected remotely

• Adjustable response time

• Adjustable sensitivity

• Continuous auto-calibration

• Digital processing method

• Direct and latching switch modes

• AEC-Q100 compliant version available for

automotive applications

• I²C Fast-mode Plus (Fm+) compatible interface

• Two I²C-bus addresses

• Cascading of two ICs possible

• Interrupt signaling over I²C-bus

• Interrupt output

• Wide voltage operating range (Vdd = 2.5 V to 5.5 V)

• Sleep mode (Idd < 100 nA)

• Low-power battery operation possible (Idd ~ 10 µA)

• Operating temperature range (Tamb = -40 °C to +85 °C)

• Available in TSSOP28 and SOIC28 package

Applications

• Replacing mechanical switches

• Hermetically sealed keys on a keyboard

• Switches for medical applications

• Touch switch in front of LCD display

• Audio control: on/off, channel, and volume

• User interface and vandal-proof switches

• Switches in or under upholstery, leather, handles, mats,

carpets, tiles and glass

• Use of standard metal sanitary parts (for example, a

tap) as switch

• Portable communication and entertainment units

• White goods control panel

Device Voltage

Range (V)

Input

Capacitive

Range (pF)

Sensor

Channels

Temperature

Range (˚C) I2C Interface AEC-Q100

Compliant Package

PCA8885 2.5–5.5 10–40 8 -40 to +85 Fm+ TSSOP28,

SOIC28

PCF8885 2.5–5.5 10–40 8 -40 to +85 Fm+ TSSOP28,

SOIC28

PCF8883 3-9 10-60 1 -40 to +85 1 interrupt SO8, CSP

PCA8886 3-9 10-60 2 -40 to +85 2 interrupts TSSOP16

Capacitive Sensor Selection Guide

I2C-bus Components Selection Guide

Replace mechanical switches with NXP’s

capacitive touch and proximity sensors.

Add switches in or under upholstery, leather,

handles, mats, carpets, tiles, and glass.

Ideal for use in hermetically sealed keyboard

keys, medical applications switches, hazardous

environment switches, white goods control,

and more.

PCA8885

CAPACITIVE

TOUCH AND

PROXIMITY

SENSOR

FEATURES

Up Your Product’s

“Cool” Factor

`AEC-Q100 compliance for automotive applications

`Dynamic touch and proximity sensor with

8 sensor channels

`Support for remote connectivity to sensing plates

`Adjustable sensitivity with continuous

auto-calibration

`I2C Fast-mode Plus (Fm+) compatible interface

`Operating voltage range of 2.5 V to 5.5 V

`-40 °C to +85 °C operations

I2C-bus Components Selection Guide

Demo Boards

NXP offers a wide variety of supporting demonstration and evaluation boards, making it easy to program new

peripherals and learn about the I2C-bus protocol.

Product Description

OM6270 SPI/ I2C-to-UART bridge demonstration board

(SC16IS750)

OM6271 SPI-to-I2C-master bridge demonstration board

(SC18IS600)

OM6272 UART-to-I2C-master bridge demonstration board

(SC18IM700)

OM6273 SPI/ I2C-to-DUART/IrDA/GPIO demonstration

board (SC16IS752)

OM6274 I2C-to-SPI-master bridge demonstration board

(SC18IS602)

OM6275 I2C 2005-1 evaluation board

OM6276 PCA9633 demonstration board

OM6277 PCA9564 evaluation board

OM6278 I2C 2002-1A evaluation board

OM6281 PCA9698 daughter card for I2C 2005-1

OM6282 PCA9633 daughter card for I2C 2005-1

OM6285 I2C 2002-1A evaluation board without PC

controller board

OM6290 LCD driver evaluation board: PCF8576D, PCF2119,

PCF8531, PCA9633

OM6292 PCA21125, PCF8562 demonstration board

OM6293 PCA9600 daughter card for I2C 2005-1

OM6297 PCF2123, PCF8562 demonstration board

OM11051 PCF2127A demonstration board

OM11056 PCA8885/PCF8885 evaluation board

OM11057

OM11057A

PCF8885/86 capacitive sensor and PCF8536 LCD/

LED driver

OM11057A with high sensitivity slider

OM13260 I2C Fm+ development board (RoHS)

OM13285 PCA9629 demonstration board

OM13303 GPIO target board (RoHS)

OM13320 I2C Fm+ development kit (RoHS)

OM13398 PCA9617A bus buffer board

OM13399 Bridge board

OM13320 Fm+ Demonstration Kit which includes

the OM13260 Fm+ Development Board with two

OM13303 GPIO Target Boards and one each of the

OM13398 PCA9617A bus buffer and

OM13399 bridge board

I2C-bus Components Selection Guide

Resources

Frequently Asked Questions

Question: Does the presence of Standard Mode devices preclude 1Mbps transfers between Fm+ devices?

Answer: NXP’s Fm+ parts are backward compatible, but a system containing a mix of Standard Mode, Fm, and

Fm+ parts can only be operated at the speed of the slowest part, so if maximum speed is desired, it is

necessary to segregate different speed grade functions onto different I2C-buses.

Question: If an I2C slave device isn’t responding, what are the possible reasons?

Answer: If an I2C slave device doesn’t respond properly, it may be because there was an I2C protocol violation, or

fewer than 8 bits were written to the slave. Also consider that the address could be wrong, the device isn’t

powered up or it is in reset mode.

Question: What does quasi-bidirectional data pins mean? Why do you use quasi?

Answer: Port pins may be described as “quasi-” bidirectional because they are not ALWAYS bidirectional. The

“quasi” means “sometimes” bidirectional. They are bidirectional only when in their default or reset state, or

when they are written as HIGH. In this situation, they are internally pulled high by a weak pull-up current and

they can be pulled LOW by an external signal when they are being used as an input. Port pins may also be

driven high by an external signal. If any port pins are written as LOW, then those pins become unidirectional

outputs and they cannot be used as inputs. The quasi bi-directional devices are very to easy to program.

Question: Can we create a protocol-based bus recovery mechanism using signal toggles for our host I2C path

if the I2C state machine gets hung in the middle of transmitting a byte of data back to the host?

Answer: Bit toggling should work to recover a hung I2C-bus, especially if the design uses NXP microprocessors

and I2C devices. Send out nine clock pulses rather than examining the SDA pin. This approach should

guarantee that the slave removes itself from the bus.

Question: What does remote I/O expander mean?

Answer: Remote I/O expander means the I/O expander is an external chip. It is like any I/O expander in terms of its

application and function.

Question: Can I place masters on either side of an I2C multiplexer?

Answer: I2C multiplexer/switches are very simple devices that are controlled by a master located on the upstream

side. If all of the masters in the system (upstream and downstream of the multiplexer/switches) are

multi-master capable, then it is safe to place them on either side of a multiplexer/switches, but the

downstream masters are isolated when the channel is open since they have no access to the multiplexer/

switch state machine.

Question: How should an unused /RESET pin be terminated?

Answer: An unused /RESET pin needs to be connected to Vcc either directly or through a resistor to limit current if

there is a fault.

Question: How should an unused /INT pin be terminated?

Answer: An unused /INT pin may be connected to GND or left unconnected since it is an open drain output.

I2C-bus Components Selection Guide

Website Product Information

I2C-bus websites: www.nxp.com/interface and http://www.nxp.com/products/interface_and_connectivity/i2c

NXP’s I2C-bus websites are a valuable resource for device information and support. They provide direct access

to comprehensive product literature, such as brochures, datasheets, application notes, presentations, packaging

information, and more.

I2C-bus support: http://ics.nxp.com/support/

Visit the I2C-bus support page for manuals, FAQs, information about evaluation kits, tools and training materials, links

to application and design support, and more.

Packaging Information: http://ics.nxp.com/packaging/

Visit the I2C-bus packaging page for technical information about NXP package options.

Videos

www.youtube.com/nxpinterface

Contact Information

Corporate Headquarters:

NXP Semiconductors

Corporate Communications & Branding

High Tech Campus 60

5656 AG Eindhoven

The Netherlands

Fax: +31 40 27 26533

North America:

NXP Semiconductors

411 E. Plumeria Drive

San Jose, CA 95134, USA

Technical Support and Sales

Technical Support: http://www.nxp.com/technicalsupport/

For sales ofﬁces and distributors, please visit: www.nxp.com/contact

Notices

Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner.

The information presented in this document does not form part of any quotation or contract, is believed

to be accurate and reliable and may be changed without notice.

No liability will be accepted by the publisher for any consequence of its use. Publication thereof does

not convey nor imply any license under patent- or other industrial or intellectual property rights.

Date of release: May 2013

Document order number: 12NC: 9397 750 17443

Mouser Electronics

Authorized Distributor

Click to View Pricing, Inventory, Delivery & Lifecycle Information:

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