Refer to the PDF data sheet for device specific package drawings
The SN75176A differential bus transceiver is a monolithic integrated circuit designed for bidirectional data communication on multipoint bus-transmission lines. It is designed for balanced transmission lines and meets ANSI Standard EIA/TIA-422-B and ITU Recommendation V.11.
The SN75176A combines a 3-state differential line driver and a differential input line receiver, both of which operate from a single 5-V power supply. The driver and receiver have active-high and active-low enables, respectively, that can be externally connected together to function as a direction control. The driver differential outputs and the receiver differential inputs are connected internally to form differential input/output (I/O) bus ports that are designed to offer minimum loading to the bus whenever the driver is disabled or VCC = 0. These ports feature wide positive and negative common-mode voltage ranges making the device suitable for party-line applications.
The driver is designed to handle loads up to 60 mA of sink or source current. The driver features positive- and negative-current limiting and thermal shutdown for protection from line fault conditions. Thermal shutdown is designed to occur at a junction temperature of approximately 150°C. The receiver features a minimum input impedance of 12 kΩ, an input sensitivity of ±200 mV, and a typical input hysteresis of 50 mV.
The SN75176A can be used in transmission-line applications employing the SN75172 and SN75174 quadruple differential line drivers and SN75173 and SN75175 quadruple differential line receivers.
The SN75176A is characterized for operation from 0°C to 70°C.
PART NUMBER | PACKAGE (PIN) | BODY SIZE (NOM) |
---|---|---|
SN75176A | SOIC (8) | 4.90 mm × 3.91 mm |
PDIP (8) | 9.81 mm × 6.35 mm |
Changes from Revision B (January 2015) to Revision C (October 2022)
Changes from Revision A (May 1995) to Revision B (January 2015)
PIN | TYPE | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
R | 1 | O | Logic Data Output from RS-485 Receiver |
RE | 2 | I | Receive Enable (active low) |
DE | 3 | I | Driver Enable (active high) |
D | 4 | I | Logic Data Input to RS-485 Driver |
GND | 5 | — | Device Ground Pin |
A | 6 | I/O | RS-422 or RS-485 Data Line |
B | 7 | I/O | RS-422 or RS-485 Data Line |
VCC | 8 | — | Power Input. Connect to 5-V Power Source. |