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SN751178 Datasheet Preview

SN751178 Datasheet

DUAL DIFFERENTIAL DRIVERS/RECEIVERS

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SN751177, SN751178
DUAL DIFFERENTIAL DRIVERS AND RECEIVERS
SLLS059D – FEBRUARY 1990 – REVISED MAY 1999
D Meet or Exceed the Requirements of ANSI
Standards TIA/EIA-422-B and TIA/EIA-485-A
and ITU Recommendations V.10 and V.11
D Designed for Multipoint Bus Transmission
on Long Bus Lines in Noise Environments
D Driver Positive- and Negative-Current
Limiting
D Thermal Shutdown Protection
D Driver 3-State Outputs
D Receiver Common-Mode Input Voltage
Range of –12 V to 12 V
D Receiver Input Sensitivity . . . ±200 mV
D Receiver Hysteresis . . . 50 mV Typ
D Receiver Input Impedance . . . 12 kMin
D Receiver 3-State Outputs (SN751177 Only)
D Operate From Single 5-V Supply
description
The SN751177 and SN751178 dual differential
drivers and receivers are monolithic integrated
circuits that are designed for balanced multipoint
bus transmission at rates up to 10 Mbit/s. They are
designed to improve the performance of
full-duplex data communications over long bus
lines and meet ANSI Standards TIA/EIA-422-B
and TIA/EIA-485-A and ITU Recommendations
V.10 and V.11.
SN751177 . . . N OR NS† PACKAGE
(TOP VIEW)
1B 1
1A 2
1R 3
RE 4
2R 5
2A 6
2B 7
GND 8
16 VCC
15 1D
14 1Y
13 1Z
12 DE
11 2Z
10 2Y
9 2D
SN751178 . . . N OR NS† PACKAGE
(TOP VIEW)
1B 1
1A 2
1R 3
1DE 4
2R 5
2A 6
2B 7
GND 8
16 VCC
15 1D
14 1Y
13 1Z
12 2DE
11 2Z
10 2Y
9 2D
The NS package is only available taped and reeled.
The SN751177 and SN751178 driver outputs provide limiting for both positive and negative currents and
thermal-shutdown protection from line-fault conditions on the transmission bus line.
The receiver features high input impedance of at least 12 k, an input sensitivity of ±200 mV over a
common-mode input voltage range of –12 V to 12 V, and typical input hysteresis of 50 mV. Fail-safe design
ensures that if the receiver inputs are open, the receiver outputs always will be high.
The SN751177 and SN751178 are characterized for operation from –20°C to 85°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
Copyright © 1999, Texas Instruments Incorporated
1




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SN751178 Datasheet Preview

SN751178 Datasheet

DUAL DIFFERENTIAL DRIVERS/RECEIVERS

No Preview Available !

SN751177, SN751178
DUAL DIFFERENTIAL DRIVERS AND RECEIVERS
SLLS059D – FEBRUARY 1990 – REVISED MAY 1999
Function Tables
SN751177, SN751178
(each driver)
INPUT ENABLE
D
DE
OUTPUTS
Y
Z
H
H
H
L
L
H
L
H
X
L
Z
Z
H = high level, L = low level, X = irrelevant,
Z = high impedance (off)
SN751177
(each receiver)
DIFFERENTIAL INPUTS ENABLE OUTPUT
A–B
RE
R
VID 0.2 V
L
H
–0.2 V < VID < 0.2 V
L
?
VID –0.2 V
L
L
X
H
Z
Open
L
H
H = high level, L = low level, ? = indeterminate,
X = irrelevant, Z = high impedance (off)
SN751178
(each receiver)
DIFFERENTIAL INPUTS OUTPUT
A–B
R
VID 0.2 V
–0.2 V < VID < 0.2 V
VID –0.2 V
H = high level, L =
? = indeterminate
H
?
L
low level,
2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Part Number SN751178
Description DUAL DIFFERENTIAL DRIVERS/RECEIVERS
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