DS3691MX/NOPB - NATIONAL SEMICONDUCTOR

DS3691

April 24, 2012

(RS-422/RS-423) Line Drivers with TRI-STATE® Outputs

General Description

The DS3691 is a low power Schottky TTL line driver designed

to meet the requirements of EIA standards RS-422 and

RS-423. It features 4 buffered outputs with high source and

sink current capability with internal short circuit protection. A

mode control input provides a choice of operation either as 4

single-ended line drivers or 2 differential line drivers. A rise

time control pin allows the use of an external capacitor to slow

the rise time for suppression of near end crosstalk to other

receivers in the cable. Rise time capacitors are primarily in-

tended for waveshaping output signals in the single-ended

driver mode. Multipoint applications in differential mode with

waveshaping capacitors is not allowed.

With the mode select pin low, the DS3691 are dual-differential

line drivers with TRI-STATE outputs. They feature ±10V out-

put common-mode range in TRI-STATE mode and 0V output

unbalance when operated with ±5V supply.

Features

■Dual RS-422 line driver with mode pin low, or quad RS-423

line driver with mode pin high

■TRI-STATE outputs in RS-422 mode

■Short circuit protection for both source and sink outputs

■Outputs will not clamp line with power off or in TRI-STATE

■100Ω transmission line drive capability

■Low ICC and IEE power consumption

RS-422: ICC = 9 mA/driver typ

RS-423: ICC = 4.5 mA/driver typ:

I EE = 2.5 mA/driver typ

■Low current PNP inputs compatible with TTL, MOS and

CMOS

■Pin compatible with AM26LS30

Connection Diagrams

With Mode Select LOW

(RS-422 Connection)

578301

Top View

With Mode Select HIGH

(RS-423 Connection)

578302

Top View

Ordering Information

Order Number, Flow Package Type Package Number Delivery Method, Quantity

DS3691M/NOPB SO Package M16A Rail, 48

DS3691MX/NOPB SO Package M16A Reel, 2500

All DS1691A, DS3691N versions are OBSOLETE and are no longer offered. See Website for current

Ordering Information.

TRI-STATE® is a registered trademark of National Semiconductor Corporation.

DS3691 (RS-422/RS-423) Line Drivers with TRI-STATE Outputs

Absolute Maximum Ratings (Note 2)

If Military/Aerospace specified devices are required,

please contact the Texas Instruments Sales Office/

Distributors for availability and specifications.

Supply Voltage

VCC 7V

VEE −7V

Maximum Power Dissipation (Note 1) at 25°C

SO Package 1051 mW

Input Voltage 15V

Output Voltage (Power OFF) ±15V

Storage Temperature −65°C to + 150°C

Lead Temperature

(Soldering, 4 seconds) 260°C

Operating Conditions

Min Max Units

Supply Voltage

VCC 4.75 5.25 V

VEE −4.75 −5.25 V

Temperature (TA) 0 +70 °C

Note 1: Derate SO package 8.41 mW/°C above 25°C.

DC Electrical Characteristics (Note 3, Note 4, Note 5, Note 6)

Symbol Parameter Conditions Min Typ Max Units

RS-422 CONNECTION, VEE CONNECTION TO GROUND, MODE SELECT ≤ 0.8V

VIH High Level Input Voltage 2 V

VIL Low Level Input Voltage 0.8 V

IIH High Level Input Current VIN = 2.4V 1 40 μA

VIN ≤ 15V 10 100 μA

IIL Low Level Input Current VIN = 0.4V −30 −200 μA

VIInput Clamp Voltage I IN = −12 mA −1.5 V

VODifferential Output Voltage RL = ∞VIN = 2V 3.6 6.0 V

VOVA,B VIN = 0.8V −3.6 −6.0 V

VTDifferential Output Voltage RL = 100Ω VIN = 2V 2 2.4 V

VTVA,B VCC ≥ 4.75V VIN = 0.8V −2 −2.4 V

VOS, VOS Common-Mode Offset RL = 100Ω 2.5 3 V

Voltage

|VT| − | VT | Difference in Differential RL = 100Ω 0.05 0.4 V

Output Voltage

|VOS| − | VOS | Difference in Common- RL = 100Ω 0.05 0.4 V

Mode Offset Voltage

VSS |VT − VT | R L = 100Ω, VCC ≥ 4.75V 4.0 4.8 V

VCMR Output Voltage Common- VDISABLE = 2.4V ±10 V

Mode Range

IXA Output Leakage Current VCC = 0V VCMR = 10V 100 μA

IXB Power OFF VCMR = −10V −100 μA

IOX TRI-STATE Output Current VCC = Max VCMR ≤ 10V 100 μA

VEE = 0V and −5V VCMR ≥ −10V −100 μA

ISA Output Short Circuit Current VIN = 0.4V VOA = 6V 80 150 mA

VOB = 0V −80 −150 mA

ISB Output Short Circuit Current VIN = 2.4V VOA = 0V −80 −150 mA

VOB = 6V 80 150 mA

ICC Supply Current 18 30 mA

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DS3691

AC Electrical Characteristics (Note 6)

TA = 25°C

Symbol Parameter Conditions Min Typ Max Units

RS-422 CONNECTION, VCC = 5V, MODE SELECT = 0.8V

trOutput Rise Time RL = 100Ω, CL = 500 pF (Figure 1 ) 120 200 ns

tfOutput Fall Time RL = 100Ω, CL = 500 pF (Figure 1 ) 120 200 ns

tPDH Output Propagation Delay RL = 100Ω, CL = 500 pF (Figure 1 ) 120 200 ns

tPDL Output Propagation Delay RL = 100Ω, CL = 500 pF (Figure 1 ) 120 200 ns

tPZL TRI-STATE Delay RL = 450Ω, CL = 500 pF, CC = 0 pF (Figure 4 ) 250 350 ns

tPZH TRI-STATE Delay RL = 450Ω, CL = 500 pF, CC = 0 pF (Figure 4 ) 180 300 ns

tPLZ TRI-STATE Delay RL = 450Ω, CL = 500 pF, CC = 0 pF (Figure 4 ) 180 300 ns

tPHZ TRI-STATE Delay RL = 450Ω, CL = 500 pF, CC = 0 pF (Figure 4 ) 250 350 ns

DC Electrical Characteristics (Note 3, Note 4, Note 5, Note 6)

Symbol Parameter Conditions Min Typ Max Units

RS-423 CONNECTION, |VCC| = |V EE|, MODE SELECT ≥ 2V

VIH High Level Input Voltage 2 V

VIL Low Level Input Voltage 0.8 V

IIH High Level Input Current VIN = 2.4V 1 40 μA

VIN ≤ 15V 10 100 μA

IIL Low Level Input Current VIN = 0.4V −30 −200 μA

VIInput Clamp Voltage IIN = −12 mA −1.5 V

VOOutput Voltage RL = ∞, (Note 7)VIN = 2V 4.0 4.4 6.0 V

VO VCC ≥ 4.75V VIN = 0.4V −4.0 −4.4 −6.0 V

VTOutput Voltage RL = 450Ω VIN = 2.4V 3.6 4.1 V

VT VCC ≥ 4.75V VIN = 0.4V −3.6 −4.1 V

|VT| − | VT | Output Unbalance |V CC| = |VEE| = 4.75V, R L = 450Ω 0.02 0.4 V

IX+Output Leakage Power OFF VCC = V EE = 0V VO = 6V 2 100 μA

IX−Output Leakage Power OFF VCC = V EE = 0V VO = −6V −2 −100 μA

IS+Output Short Circuit Current VO = 0V VIN = 2.4V −80 −150 mA

IS−Output Short Circuit Current VO = 0V VIN = 0.4V 80 150 mA

ISLEW Slew Control Current ±140 μA

ICC Positive Supply Current V IN = 0.4V, RL = ∞ 18 30 mA

IEE Negative Supply Current V IN = 0.4V, RL = ∞ −10 −22 mA

Note 2: “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices

should be operated at these limits. The tables of “Electrical Characteristics” provide conditions for actual device operation.

Note 3: Unless otherwise specified, min/max limits apply across the −55°C to +125°C temperature range for the DS1691A and across the 0°C to +70°C range

for the DS3691. All typicals are given for V CC = 5V and TA = 25°C. VCC and VEE as listed in operating conditions.

Note 4: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to ground unless otherwise specified.

Note 5: Only one output at a time should be shorted.

Note 6: Symbols and definitions correspond to EIA RS-422 and/or RS-423 where applicable.

Note 7: At −55°C, the output voltage is +3.9V minimum and −3.9V minimum.

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DS3691

AC Electrical Characteristics (Note 6)

TA = 25°C

Symbol Parameter Conditions Min Typ Max Units

RS-423 CONNECTION, VCC = 5V, VEE −5V, MODE SELECT = 2.4V

trRise Time RL = 450Ω, CL = 500 pF, CC = 0 (Figure 2 ) 120 300 ns

tfFall Time RL = 450Ω, CL = 500 pF, CC = 0 (Figure 2 ) 120 300 ns

trRise Time RL = 450Ω, CL = 500 pF CC = 50 pF (Figure 3 ) 3.0 μs

tfFall Time RL = 450Ω, CL = 500 pF CC = 50 pF (Figure 3 ) 3.0 μs

trc Rise Time Coefficient RL = 450Ω, CL = 500 pF, CC = 50 pF (Figure 3 ) 0.06 μs/pF

tPDH Output Propagation Delay RL = 450Ω, CL = 500 pF, CC = 0 (Figure 2 ) 180 300 ns

tPDL Output Propagation Delay RL = 450Ω, CL = 500 pF, CC = 0 (Figure 2 ) 180 300 ns

AC Test Circuits and Switching Time Waveforms

578303

578304

FIGURE 1. Differential Connection

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DS3691

578305

578306

FIGURE 2. RS-423 Connection

578307

578308

FIGURE 3. Rise Time Control for RS-423

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DS3691

578309

578310

FIGURE 4. TRI-STATE Delays

Switching Waveforms

578311

FIGURE 5. Typical Output Voltage

Truth Table

Operation Inputs Outputs

Mode A (D) B (C) A (D) B (C)

RS-422 0 0 0 0 1

0 0 1 TRI-STATE TRI-STATE

0 1 0 1 0

0 1 1 TRI-STATE TRI-STATE

RS-423 1 0 0 0 0

1 0 1 0 1

1 1 0 1 0

1 1 1 1 1

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DS3691

Typical Application Information

Fully Loaded RS-422 Interface

578313

RS-422 Point to Point Application

578314

Fully Loaded RS-423 Interface

578315

Differential Application with Rise Time Control

578316

*Note: Controlled edge allows longer stub lengths. Multiple Drivers are NOT allowed.

Dual RS-423 Inverting Driver

578317

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DS3691

Typical Rise Time Control Characteristics

(RS-423 Mode)

Rise Time vs External Capacitor

578312

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DS3691

Physical Dimensions inches (millimeters) unless otherwise noted

SO Package (M)

Order Number DS3691M

NS Package Number M16A

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DS3691

Notes

DS3691 (RS-422/RS-423) Line Drivers with TRI-STATE Outputs

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