SN75ALS181
DIFFERENTIAL DRIVER AND RECEIVER PAIR
SLLS152B – DECEMBER 1992 – REVISED APRIL 2003
N OR NS PACKAGE
(TOP VIEW)
Meets TIA/EIA-422-B, TIA/EIA-485-A, and
CCITT Recommendations V.11 and X.27
Low Supply-Current Requirements . . .
30 mA Max
NC
R
RE
DE
D
V
V
A
B
Z
Y
1
2
3
4
5
6
7
14
13
12
11
10
9
CC
CC
Driver Output Capacity . . . ±60 mA
Thermal Shutdown Protection
Driver Common-Mode Output Voltage
Range of –7 V to 12 V
GND
GND
NC
8
Receiver Input Impedance . . . 12 kΩ Min
Receiver Input Sensitivity . . . ±200 mV
Receiver Input Hysteresis . . . 60 mV Typ
NC – No internal connection
Receiver Common-Mode Input Voltage
Range of ±12 V
Operates From Single 5-V Supply
Glitch-Free Power-Up and Power-Down
Protection
description/ordering information
The SN75ALS181 is a differential driver and receiver pair designed for bidirectional data communication on
multipoint bus transmission lines. The design provides for balanced transmission lines and meets
TIA/EIA-422-B and TIA/EIA-485-A, and CCITT recommendations V.10, V.11, X.26, and X.27.
The SN75ALS181 combines a 3-state differential line driver and a differential-input line receiver that 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 to separate pins for greater flexibility and are designed to offer
minimum loading to the bus when the driver is disabled or V
negative common-mode voltage changes, making the device suitable for party-line applications.
= 0. These ports feature wide positive and
CC
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
T
A
PACKAGE
PDIP (N)
Tube of 25
SN75ALS181N
SN75ALS181N
75ALS181
0°C to 70°C
SOP (NS)
Reel of 2000
SN75ALS181NSR
†
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
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