I2C-bus Components Selection Guide I2C-bus Components Selection Guide Overview 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 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 devices 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 UltraFast-mode (UFm). I2C Applications Blinkers, Dimmers, Drivers (LED Controllers) . . . . . . . . . 23 Although originally designed to link a small number of devices locally, 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. Capacitive Sensors . . . . . . . 25 I2C Specification Demo Boards . . . . . . . . . . . 27 For the I2C-bus specification and user manual, please visit: http://www.nxp.com/documents/user_manual/UM10204.pdf Bridge Integrated Circuits and Bus Controllers . . . . . . 21 Resources . . . . . . . . . . . . . . 28 Contact Information . . . . . . 29 1 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. 2 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 GPIO Expanders Selection Guide Device # of Outputs Quasi Output Push-Pull Output Internal Pull-up Resistor/ Current Source Vcc Range (V) I2C Max Frequency (kHz) 1.1 to 3.6 1000 2.3 to 5.5 400 /OE Hardware Reset Interrupt Output PCA9570 4 Output Only PCA9536 4 PCA9537 4 2.3 to 5.5 400 PCA9571 8 Output Only 1.1 to 3.6 1000 PCA6408A 8 1.65 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 2kbit EEPROM 5-bit Multiplex/ 1-bit Latch EEPROM 3 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 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 2.3 to 5.5 1000 Open Drain 2kbit EEPROM 5-bit Multiplex/ 1-bit Latch EEPROM GPIO Expanders Agile I/O Selection Guide # of Outputs Quasi Output PushPull 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 Device 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) 4 I2C-bus Components Selection Guide 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 Need a Simple, Low-cost Way to Add I/O and Voltage Level Shifting to your I2C Design? 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 5 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 A/D Resolution (C/#bits) Supply Range (V) Supply Operating Current (A) Supply Operating Current (A) (typical 25 C/max 125 C) Package Options 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 Device Fan Control Output PCT1075 SA56004 NE1617A 1 Local Sensing Accuracy (C) Remote Sensing Accuracy (C) 2 1 0.125/11 3.0 to 3.6 500 10/NA SO-8 TSSOP-8 HVSON-8 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. 6 I2C-bus Components Selection Guide Precise Temperature Monitoring Made Simple NXP's I2C-bus controlled temperature sensors offer highresolution 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 7 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 Applications * * * * * * Industrial --e-meter (electricity, gas, water) --White goods --Home appliance --Test & measurement systems --Machine control systems --Point of Sales (POS) terminals * * * * 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) * Automotive --Instrument cluster --Climate control unit --Car radio --Tachographs * Consumer --Handheld electronics --Battery operated equipment --General purpose display modules * Medical and health care LCD Segment Drivers Device Max number of elements Number of elements at Multiplex Rate MUX 1:1 MUX 1:2 MUX 1:3 MUX 1:4 96 MUX 1:6 MUX 1:8 VDD MUX 1:9 VLCD Frame Frequency (Hz) On-Chip VLCD Generation (Charge Pump) On Chip VLCD Temperature Compensation [min] (V) [max] (V) [min] (V) [max] (V) 128 1.8 5.5 2.5 6.5 82 N Tamb Package AEC-Q100 compliant 85 TSSOP48 N [min] (C) [max] (C) N -40 PCF85162T 128 32 64 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 60-3001 N N -40 85 TSSOP56 N PCA8536AT 320 176 252 320 1.8 5.5 2.5 9 60-3001 N N -40 95 TSSOP56 Y PCF8537AH 352 44 88 176 276 352 1.8 5.5 2.5 9 60-3001 Y Y -40 85 TQFP64 N PCA8537AH 352 44 88 176 276 352 1.8 5.5 2.5 9 60-3001 Y Y -40 95 TQFP64 Y PCA9620H 480 60 120 240 320 480 2.5 5.5 2.5 9 1 60-300 Y Y -40 105 LQFP80 Y PCA9620U 480 60 120 240 320 480 2.5 5.5 2.5 9 60-3001 Y Y -40 105 Bare die Y N Y PCF8576DU 160 40 80 120 160 1.8 5.5 2.5 6.5 77 N N -40 85 Goldbumped die, bare die PCA8576DU 160 40 80 120 160 1.8 5.5 2.5 6.5 77 N N -40 85 Goldbumped die 1. SW programmable. 2. HW selectable. 3. Release H1 2013. 4. Release H2 2013. 8 I2C-bus Components Selection Guide Max number of elements Device Number of elements at Multiplex Rate MUX 1:1 MUX 1:2 MUX 1:3 MUX 1:4 MUX 1:6 MUX 1:8 VDD MUX 1:9 VLCD [min] (V) [max] (V) [min] (V) [max] (V) Frame Frequency (Hz) On-Chip VLCD Generation (Charge Pump) On Chip VLCD Temperature Compensation Tamb [min] (C) [max] (C) Package AEC-Q100 compliant PCA8576FU4 160 40 80 120 160 1.8 5.5 2.5 6.5 200 N N -40 95 Goldbumped die Y PCF85133U 320 80 160 240 320 1.8 5.5 2.5 6.5 82/1102 N N -40 85 Goldbumped die N PCA85133U 320 80 160 240 320 1.8 5.5 2.5 8 82/1102 N N -40 95 Goldbumped die Y PCA85233U4 320 80 160 240 320 1.8 5.5 2.5 8 150/2202 N N -40 95 Goldbumped die Y PCF85132U 640 160 320 480 640 1.8 5.5 1.8 8 60-901 N N -40 85 Goldbumped die N PCA85132U 640 160 320 480 640 1.8 5.5 1.8 8 60-901 N N -40 95 Goldbumped die Y PCA85232U 640 160 320 480 640 1.8 5.5 1.8 8 117-1761 N N -40 95 Goldbumped die Y PCF8538U3 918 102 204 408 612 816 918 2.5 5.5 4 12 45-3001 Y Y -40 85 Goldbumped die N PCA8538U3 918 102 204 408 612 816 918 2.5 5.5 4 12 45-3001 Y Y -40 105 Goldbumped die Y 1. SW programmable. 2. HW selectable. 3. Release H1 2013. 4. Release H2 2013. LCD Character Drivers Number of Lines x Number of Characters Device VDD1 Number of Icons Character Set VDD2 VLCD [min] [max] [min] [max] [min] [max] (V) (V) (V) (V) (V) (V) Frame Frequency (Hz) On-Chip VLCD Generation (Charge Pump) On Chip VLCD Temperature Compensation Tamb Package AEC-Q100 compliant [min] [max] (C) (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 4 x 12 PCF2116CU 1 x 24 2 x 24 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 PCF2117RU2 1 x 40 2 x 20 200 R 2.5 5.5 2.5 5.5 4 16 45-3001 Y Y -40 85 Gold-bumped die N 2 PCA2117RU 1 x 40 2 x 20 200 R 2.5 5.5 2.5 5.5 4 16 1 45-300 Y Y -40 105 Gold-bumped die Y PCF2117SU2 1 x 40 2 x 20 200 S 2.5 5.5 2.5 5.5 4 16 45-3001 Y Y -40 85 Gold-bumped die N PCA2117SU2 1 x 40 2 x 20 200 S 2.5 5.5 2.5 5.5 4 16 45-3001 Y Y -40 105 Gold-bumped die Y 1. SW programmable. 2. Release H2 2013. 9 I2C-bus Components Selection Guide LCD Graphic Drivers VDD1 VDD2 VLCD Max Display Resolution Rows x Cols Multiplex Rates PCF8539U2 18 x 100 Mux 1:12; Mux 1:18 2.5 5.5 2.5 5.5 4 PCA8539U2 18 x 100 Mux 1:12; Mux 1:18 2.5 5.5 2.5 5.5 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 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 Device Tamb Frame Frequency (Hz) On-Chip VLCD Generation (Charge Pump) On Chip VLCD Temperature Compensation 16 45-3001 Y Y -40 4 16 45-3001 Y Y 4.5 4 9 66 Y 3.3 3 9 30-601 Y [min] [max] [min] [max] [min] [max] (V) (V) (V) (V) (V) (V) Package AEC-Q100 compliant 85 Gold-bumped die N -40 105 Gold-bumped die Y Y -40 85 Gold-bumped die N Y -40 85 Gold-bumped die N [min] [max] (C) (C) 1. SW programmable. 2. Release H2 2013. A8 Automotive AEC-Q100 compliant qualification for highest robustness and reliability under harshest conditions. PC Specifically designed for high-contrast, true black background Vertical Alignment (VA) displays which offer a very wide viewing angle. 537 Fully Featured LCD Drivers for High-Contrast Vertical Alignment (VA) Displays Fully featured with on-chip VLCD generation and on-chip VLCD temperature compensation. PCA8537 LCD DRIVER FEATURES 10 352-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 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 * Portable instruments * Electronic metering * Battery-powered products Clocks and Real Time Clocks Selection Guide Device Bus Feature PCA8802 I2C Fm Ultra low power Smartcard; integrated counter for initiating one time password generation PCF8523 I2C Fm+ 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 (-40C - +125C) clock/calendar PCF8583 I2C Clock/calendar resolution 0.01 s with 256x8 SRAM Ultra low power with loss of main power detect and auto battery switch over PCF2127A I2C Fm High-accuracy, low-voltage with 512x8 RAM; temperature compensated PCA/PCF2129(A) I C Fm High accuracy; temperature compensated 2 Precision Timekeeping Doesn't Have to Consume Lots of Power 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 11 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 Tiny Serial ADC and DAC Selection Guide Device PCF8591 A/D D/A # Bits I2C-bus Frequency Maximum Conversion Rate (kHz) 8 100 kHz 11 Add Data Conversion Functionality with Minimal Impact 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 12 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 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 Multiplexers and Switches Selection Guide Multiplexer (In/Out) Device Switch (In/Out) I2C-bus # of Addresses Interrupt (IN-OUT) PCA9540B 1-2 1 PCA9541A 2-1 16 1-2 1-2 8 2-1 4 2-1 8 4-1 4-1 PCA9542A PCA9543A/B 1-2 1 PCA9544A 1-4 Hardware Reset Packages Pin Count SO (Narrow) 8 SO (Wide) TSSOP XSON or HVQFN D DP GD 16 D PW BS 14 D PW 14 D PW 20 D PW BS 20 D PW BS PW BS PCA9545A/B2 1-4 4 PCA9546A 1-4 8 16 8 24 D PW BS D PW BS PCA9547 1-8 PCA9548A 1-8 8 24 PCA9646 1-4 8 16 3 D D PW 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 13 I2C-bus Components Selection Guide Expand the Reach of your I2C-based Application 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 14 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 Bus Buffers and Voltage Translators Selection Guide 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 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 <3m Over voltage tolerant PCA9522 Incremental Offset 1 MHz HV hot-swap bus buffer 1.3 to 10V 6 1.3 to 10V 6 8 <3m Over voltage tolerant PCA9525 No offset Buffer 1 MHz bus repeater 1.4 to 5.5V 4 1.4 to 5.5V 4 8 <3m 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 <3m 2 Supplies PCA9509 Static Offset Fm 1.0V LV VLT with current source 1 to 4V 6 3 to 5.5V 6 8 <3m 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 <3m 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 <3m 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 <3m 2 Supplies Device P82B715 15 I2C-bus Components Selection Guide 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 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 <3m 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 <3m 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 None - FET Dual I C/SMBus Fm+ Voltage Level Translator 1 to 5.5V 64 1 to 5.5V 64 8 On Card Voltage Clamp Device PCA9306 2 Got More Needs than Capability on your I2C-bus-based System? 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 16 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 I2C-bus Components Selection Guide Have Hot Insertion Needs for Your Backplane? 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 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 17 I2C-bus Components Selection Guide I2C-Controlled EEPROM, RAM and DIP Switches (multiplexed/latched EEPROMS) Applications 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. Meter readings Electronic key Product identification numbers Serial presence detect DIP Switches 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) I2C-Controlled RAM Selection Guide 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 I2C-Controlled EEPROM Selection Guide 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 I2C-Controlled DIP Switches (Multiplexed/latched EEPROM) Selection Guide # of Pins # of Non-volatile Registers # of Register 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 Device 18 I2C-bus Components Selection Guide Still Opening Cabinets and Powering Down Equipment to Change Manual Switches? 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 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 19 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 Stepper Motor Control Doesn't Have to Consume Valuable Microprocessor Cycles. 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 20 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 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 Bridge Integrated Circuits Selection Guide Bridge Type UARTs GPIO IrDA SIR Speed (Maximum) SPI Speed (Maximum) FIFO (Bytes) SC16IS740 I2C/SPI Slave to UART 1 0 115.2 Kbps 4 64 SC16IS741 I C/SPI Slave to UART 1 SC16IS750 I C/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 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 Device 2 2 115.2 Kbps Oscillator 64 115.2 Kbps 128 Bus Controllers Selection Guide 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 Device 21 I2C-bus Components Selection Guide Type Voltage Range (V) Maximum I2C Frequency (kHz) Clock Source Parallel Interface Package 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 Transmitting Large Amounts of Serial Data? 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 22 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 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 LED Dimmers/Blinkers Selection Guide LED RGB Color Mixers Selection Guide Device # bits Type Feature Bus Device # channels Feature Bus PCA9530 2 LED Dimmer Programmable brightness I2C PCA9622 16 100mA 40V Fm+ I2C PCA9531 8 LED Dimmer Programmable brightness I2C PCA9624 8 100mA 40V Fm+ I2C PCA9532 16 LED Dimmer Programmable brightness I2C PCA9626 24 100mA 40V Fm+ I2C PCA9533 4 LED Dimmer Programmable brightness I2C PCA9632 4 Low power Fm+ I2C PCA9550 2 LED Driver Programmable blink rates I2C PCA9633 4 Optimized for RGBA color mixing Fm+ I2C PCA9551 8 LED Driver Programmable blink rates IC PCA9552 16 LED Driver Programmable blink rates I2C PCA9634 8 Optimized for RGBA color mixing Fm+ I2C PCA9553 4 LED Driver Programmable blink rates I2C PCA9635 16 Optimized for RGBA color mixing Fm+ I2C PCA9685 16 PWM LED controller Fm+ I2C PCU9654 8 100mA 40V UFm I2C LED Segment Drivers Selection Guide 2 Device Feature PCU9655 16 100mA 40V UFm I2C SAA1064 4-digit LED driver 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 Flash Drivers Selection Guide Device Feature SSL3250A Dual LED 500mA Flash driver with Torch and Indicator Modes SSL3252 Dual LED 500mA Flash driver with Torch and Indicator Modes 23 I2C-bus Components Selection Guide Add Pizzazz to Your Product with NXP's Highly Configurable LED Drivers Control blinking and dimming of RGBA LEDs to support status, display, backlight, or amusement functions. PCA9955 LED DRIVER FEATURES 24 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 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 IC Fast-mode Plus (Fm+) compatible interface Two IC-bus addresses Cascading of two ICs possible Interrupt signaling over IC-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 A) 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 Capacitive Sensor Selection Guide 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 25 I2C-bus Components Selection Guide Up Your Product's "Cool" Factor 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 26 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 27 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. 28 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 (c) 2013 NXP Semiconductors N.V. All rights reserved. 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: NXP: OM13320,598