SN75108A| Datasheet

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SN55107A, SN75107A, SN75107B, SN75108A DUAL LINE RECEIVERS
SLLS069D JANUARY 1977 REVISED APRIL 1998

D D D D D D D D D D D D D

High Speed Standard Supply Voltage Dual Channels High Common-Mode Rejection Ratio High Input Impedance High Input Sensitivity Differential Common-Mode Input Voltage Range of 3 V Strobe Inputs for Receiver Selection Gate Inputs for Logic Versatility TTL Drive Capability High dc Noise Margin Totem-Pole Outputs B Version Has Diode-Protected Input for Power-Off Condition

SN55107A . . . J OR W PACKAGE SN75107A, SN75107B, SN75108A . . . D OR N PACKAGE (TOP VIEW)

1A 1B NC 1Y 1G S GND

1 2 3 4 5 6 7

14 13 12 11 10 9 8

VCC + VCC 2A 2B NC 2Y 2G

SN55107A . . . FK PACKAGE (TOP VIEW)

description
These circuits are TTL-compatible, high-speed line receivers. Each is a monolithic dual circuit featuring two independent channels. They are designed for general use, as well as for such specific applications as data comparators and balanced, unbalanced, and party-line transmission systems. These devices are unilaterally interchangeable with and are replacements for the SN55107, SN75107, and SN75108, but offer diode-clamped strobe inputs to simplify circuit design.

NC NC 1Y NC 1G

4 5 6 7 8

3 2 1 20 19 18 17 16 15 14 9 10 11 12 13

1B 1A NC VCC + VCC 2A NC 2B NC NC
NC No internal connection Input B Version
Copyright 1998, Texas Instruments Incorporated

The essential difference between the A and B versions can be seen in the schematics. Input-protection diodes are in series with the collectors of the differential-input transistors of the B versions. These diodes are useful in certain party-line systems that have multiple VCC + power supplies and can be operated with some of the VCC + supplies turned off. In such a system, if a supply is turned off and allowed to go to ground, the equivalent input circuit connected to that supply would be as follows:
Input

A Version

This would be a problem in specific systems that might have the transmission lines biased to some potential greater than 1.4 V. The SN55107A is characterized for operation over the full military temperature range of 55 C to 125 C. The SN75107A, SN75107B, and SN75108A are characterized for operation from 0 C to 70 C.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

POST OFFICE BOX 655303

DALLAS, TEXAS 75265

S GND NC 2G 2Y