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Part: SN75176BPBD
Category:
Description: -
Company: Texas Instruments, Inc.
Datasheet: Download SN75176BPBD datasheet File size : 255 kB
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SN65176B, SN75176B DIFFERENTIAL BUS TRANSCEIVERS
SLLS101B JULY 1985 REVISED JUNE 1999
D D D D D D D D D D D D D
Bidirectional Transceivers Meet or Exceed the Requirements of ANSI Standards TIA/EIA-422-B and TIA/EIA-485-A and ITU Recommendations V.11 and X.27 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 k Min Receiver Input Sensitivity . . . ± 200 mV Receiver Input Hysteresis . . . 50 mV Typ Operate From Single 5-V Supply
D OR P PACKAGE (TOP VIEW)
R RE DE D
1 2 3 4
8 7 6 5
VC C B A GND
description
The SN65176B and SN75176B differential bus transceivers are monolithic integrated circuits designed for bidirectional data communication on multipoint bus transmission lines. They are designed for balanced transmission lines and meet ANSI Standards TIA/EIA-422-B and TIA/EIA-485-A and ITU Recommendations V.11 and X.27. The SN65176B and SN75176B combine 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 connected together externally 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 when 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 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 k, an input sensitivity of ± 200 mV, and a typical input hysteresis of 50 mV. The SN65176B and SN75176B 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 SN65176B is characterized for operation from 40°C to 105°C and the SN75176B 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.
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.
Copyright © 1999, Texas Instruments Incorporated
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
1
SN65176B, SN75176B DIFFERENTIAL BUS TRANSCEIVERS
SLLS101B JULY 1985 REVISED JUNE 1999
Function Tables
DRIVER INPUT D H L X ENABLE DE H H L RECEIVER DIFFERENTIAL INPUTS AB VID 0.2 V 0.2 V < VID < 0.2 V VID 0.2 V X Open ENABLE RE L L L H L OUTPUT R H ? L Z ? OUTPUTS A H L Z B L H Z
H = high level, L = low level, ? = indeterminate, X = irrelevant, Z = high impedance (off)
logic symbol
DE RE 3 2 EN1 EN2 6 7
logic diagram (positive logic)
DE D RE A B R 3 4 2 1 6 7 A B Bus
D
4
1 1
R
1
2
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
2
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN65176B, SN75176B DIFFERENTIAL BUS TRANSCEIVERS
SLLS101B JULY 1985 REVISED JUNE 1999
schematics of inputs and outputs
EQUIVALENT OF EACH INPUT VCC R(eq) 16.8 k NOM 960 NOM 960 NOM TYPICAL OF A AND B I/O PORTS VCC TYPICAL OF RECEIVER OUTPUT VCC 85 NOM
Input
Output
GND Driver input: R(eq) = 3 k NOM Enable inputs: R(eq )= 8 k NOM R(eq) = equivalent resistor Input/Output Port
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Voltage range at any bus terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 V to 15 V Enable input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Package thermal impedance, JA (see Note 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197°C/W P package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104°C/W Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. All voltage values, except differential input/output bus voltage, are with respect to network ground terminal. 2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace length of zero.
recommended operating conditions
MIN Supply voltage, VCC Voltage at any bus terminal (separately or common mode), VI or VIC at any bus terminal (separately or common mode) or High-level input voltage, VIH Low-level input voltage, VIL Differential input voltage, VID (see Note 3) High-level output current, IOH output current Low-level output current, IOL output current Operating free-air temperature, TA free air temperature Driver Receiver Driver Receiver SN65176B SN75176B 40 0 D, DE, and RE D, DE, and RE 2 0.8 ± 12 60 400 60 8 105 70 4.75 TYP 5 MAX 5.25 12 7 UNIT V V V V V mA µA mA °C
NOTE 3: Differential-input/output bus voltage is measured at the noninverting terminal A with respect to the inverting terminal B.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
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