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SN75276DR

更新时间： 2024-12-01 04:31:15
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意法半导体 - STMICROELECTRONICS 总线收发器
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16页 304K
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FAIL-SAFE DIFFERENTIAL BUS TRANSCEIVER

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SN75276DR 数据手册

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SN75276  
FAIL-SAFE DIFFERENTIAL BUS TRANSCEIVER  
SLLS212B – SEPTEMBER 1995 – REVISED APRIL 1998  
D OR P PACKAGE  
(TOP VIEW)  
Bidirectional Transceiver With Fail-Safe  
Receiver  
Meets or Exceeds the Requirements of ITU  
Recommendation V.11  
R
RE  
DE  
D
V
B
A
1
2
3
4
8
7
6
5
CC  
Electrically Compatible With ANSI  
Standards TIA/EIA-422-B and TIA/EIA-485-A  
GND  
Designed for Multipoint Transmission on  
Long Bus Lines in Noisy Environments  
3-State Driver and Receiver Outputs  
Individual Driver and Receiver Enables  
Wide Positive and Negative Input/Output  
Bus Voltage Ranges  
Driver Output Capability . . . ±60 mA Max  
Thermal Shutdown Protection  
Driver Positive and Negative Current  
Limiting  
Receiver Input Impedance . . . 12 kΩ Min  
Receiver Input Sensitivity . . . –300 mV/0mV  
Operates From Single 5-V Supply  
Pin-to-Pin Compatible With SN75176A  
description  
The SN75276 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 is  
electrically compatible with ANSI Standards TIA/EIA-422-B and TIA/EIA-485-A, and meets ITU  
Recommendation V.11.  
The fail-safe operation ensures a known level on the circuit output under bus fault conditions. The circuit  
provides a high-level output under floating-line, idle-line, open-circuit, and short-circuit bus conditions (see  
Function Tables).  
The SN75276 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  
V
= 0. These ports feature wide positive and negative common-mode voltage ranges making the device  
CC  
suitable for party-line applications.  
The driver is designed for 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.  
The SN75276 can be used in transmission line applications employing the SN75172 and SN75174 quadruple  
differential line drivers and SN75173 and SN75175 quadruple differential line receivers.  
SN75276 is 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.  
Copyright 1998, Texas Instruments Incorporated  
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.  
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...16

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