uA9638C-EP
www.ti.com
SLLSEA4A –DECEMBER 2011–REVISED DECEMBER 2011
DUAL HIGH-SPEED DIFFERENTIAL LINE DRIVER
Check for Samples: uA9638C-EP
1
FEATURES
2
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Meets or Exceeds ANSI Standard
EIA/TIA-422-B
SUPPORTS DEFENSE, AEROSPACE,
AND MEDICAL APPLICATIONS
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•
•
•
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Operates From a Single 5-V Power Supply
Drives Loads as Low as 50 Ω up to 15 Mbps
TTL- and CMOS-Input Compatibility
Output Short-Circuit Protection
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Controlled Baseline
One Assembly/Test Site
One Fabrication Site
Rated From –40°C to 85°C
Extended Product Life Cycle
Extended Product-Change Notification
Product Traceability
Interchangeable With National
Semiconductor™ DS9638
D PACKAGE
(TOP VIEW)
VCC
1A
1Y
1Z
2Y
2Z
1
2
3
4
8
7
6
5
2A
GND
DESCRIPTION
The uA9638C is a dual high-speed differential line driver designed to meet ANSI Standard EIA/TIA-422-B. The
inputs are TTL and CMOS compatible and have input clamp diodes. Schottky-diode-clamped transistors are
used to minimize propagation delay time. This device operates from a single 5-V power supply and is supplied in
an 8-pin package.
The uA9638 provides the current needed to drive low-impedance loads at high speeds. Typically used with
twisted-pair cabling and differential receiver(s), base-band data transmission can be accomplished up to and
exceeding 15 Mbps in properly designed systems. The uA9637A dual line receiver is commonly used as the
receiver. For even faster switching speeds in the same pin configuration, see the SN75ALS191.
The uA9638C is characterized for operation from -40°C to 85°C.
8
8
1Y
1Z
2Y
2Z
2
3
2
3
1Y
1Z
2Y
2Z
1A
2A
7
6
5
1A
2A
7
6
5
This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
Figure 2. Logic Diagram
Figure 1. Logic Symbol
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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.
National Semiconductor is a trademark of National Semiconductor Corporation.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011, Texas Instruments Incorporated