SN55ALS194, SN75ALS194
QUADRUPLE DIFFERENTIAL LINE DRIVERS
SLLS009D – OCTOBER 1985 – REVISED MAY 1995
D
D
D
D
D
D
D
SN55ALS194 . . . J OR W PACKAGE
SN75ALS194 . . . D OR N PACKAGE
(TOP VIEW)
Meet or Exceed the Requirements of ANSI
Standard EIA/TIA-422-B and ITU
Recommendation V.11
Designed to Operate Up to 20 Mbaud
3-State TTL - Compatible Outputs
Single 5-V Supply Operation
High Output Impedance in Power-Off
Condition
Two Pairs of Drivers, Independently
Enabled
Designed as Improved Replacements for
the MC3487
1A
1Y
1Z
1, 2EN
2Z
2Y
2A
GND
description
1
15
3
14
4
13
5
VCC
4A
4Y
4Z
3, 4EN
3Z
3Y
3A
16
2
12
6
11
7
10
8
9
SN55ALS194 . . . FK PACKAGE
(TOP VIEW)
1Y
1A
NC
V CC
4A
These four differential line drivers are designed
for data transmission over twisted-pair or
parallel-wire transmission lines. They meet the
requirements of ANSI Standard EIA/TIA-422-B
and ITU Recommendation V.11 and are
compatible with 3-state TTL circuits. Advanced
low-power Schottky technology provides high
speed without the usual power penalty. Standby
supply current is typically only 26 mA. Typical
propagation delay time is less than 10 ns, and
enable/disable times are typically less than
16 ns.
4
3 2 1 20 19
18
5
17
6
16
7
15
8
14
9 10 11 12 13
4Y
4Z
NC
3, 4EN
3Z
2A
GND
NC
3A
3Y
1Z
1, 2EN
NC
2Z
2Y
High-impedance inputs keep input currents low:
less than 1 µA for a high level and less than
100 µA for a low level. The driver circuits can be
enabled in pairs by separate active-high enable
inputs. The SN55ALS194 and SN75ALS194 are
capable of data rates in excess of 20 megabits
per second and are designed to operate with the
SN55ALS195 and SN75ALS195 quadruple line
receivers.
NC – No internal connection
The SN55ALS194 is characterized for operation over the full military temperature range of – 55°C to 125°C. The
SN75ALS194 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE
(each driver)
OUTPUTS
INPUTS
A
OUTPUT
EN
H
H
H
L
L
H
L
H
X
L
Z
Z
Y
Z
H = high level, L = low level, X = irrelevant,
Z = high impedance
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 © 1995, 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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
