DS1489/DS1489A
Quad Line Receiver
General Description
Features
The DS1489/DS1489A are quad line receivers designed to
interface data terminal equipment with data communications
equipment. They are constructed on a single monolithic
silicon chip. These devices satisfy the specifications of EIA
Standard RS-232D. The DS1489/DS1489A meet and exceed the specifications of MC1489/MC1489A and are
pin-for-pin replacements.
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Four separate receivers per package
Programmable threshold
Built-in input threshold hysteresis
“Fail safe” operating mode: high output for open inputs
Inputs withstand ± 30V
Schematic and Connection Diagrams
00577701
(1⁄4 of unit shown)
DS1489: RF = 10k
DS1489A: RF = 2k
Dual-In-Line or Small-Out Line Package
00577702
Top View
Order Number DS1489M, DS1489MX, DS1489N, DS1489AM, DS1489AMX or DS1489AN
See NS Package Number M14A or N14A
© 2002 National Semiconductor Corporation
DS005777
www.national.com
DS1489/DS1489A Quad Line Receiver
July 2002
