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Part: SN75176BD
Category:
Interface and Interconnect
-> RS-485
Description: ti SN75176B, Differential Bus Transceiver
Company: Texas Instruments, Inc.
Datasheet: Download SN75176BD datasheet File size : 255 kB
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Datasheet text preview:
SN65176B, SN75176B DIFFERENTIAL BUS TRANSCEIVERS
SLLS101D JULY 1985 REVISED APRIL 2003
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
SN65176B . . . D OR P PACKAGE SN75176B . . . D, P, OR PS PACKAGE (TOP VIEW)
R RE DE D
1 2 3 4
8 7 6 5
VCC B A GND
description/ordering information
The SN65176B and SN75176B differential bus transceivers are 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. ORDERING INFORMATION
TA PDIP (P) 0°C to 70°C to 70°C SOIC (D) (D) SOP (PS) PDIP (P) 40°C to 105°C SOIC (D) (D) PACKAGE Tube of 50 Tube of 75 Reel of 2500 Reel of 2000 Tube of 50 Tube of 75 Reel of 2500 ORDERABLE PART NUMBER SN75176BP SN75176BD SN75176BDR SN75176BPSR SN65176BP SN65176BD SN65176BDR TOP-SIDE MARKING SN75176BP 75176B A176B SN65176BP 65176B
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package.
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 2003, Texas Instruments Incorporated
On products compliant to MIL-PRF-38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters.
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
1
SN65176B, SN75176B DIFFERENTIAL BUS TRANSCEIVERS
SLLS101D JULY 1985 REVISED APRIL 2003
description/ordering information (continued)
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. 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 diagram (positive logic)
3 DE D RE R 4 2 6 1 7 A B Bus
2
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN65176B, SN75176B DIFFERENTIAL BUS TRANSCEIVERS
SLLS101D JULY 1985 REVISED APRIL 2003
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 Notes 2 and 3): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W P package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85°C/W PS package . . . . . . . . . . . . . . . . . . . . . . . . . . . 95°C/W Operating virtual junction temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C 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. Maximum power dissipation is a function of TJ(max), JA, and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = (TJ(max) TA)/JA. Operating at the absolute maximum TJ of 150°C can affect reliability. 3. The package thermal impedance is calculated in accordance with JESD 51-7.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
3
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