DS1489A National Semiconductor, DS1489A Datasheet

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DS1489A

Manufacturer Part Number
DS1489A
Description
Quad Line Driver
Manufacturer
National Semiconductor
Datasheet

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www.DataSheet4U.com
© 2002 National Semiconductor Corporation
DS1489/DS1489A
Quad Line Receiver
General Description
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 ex-
ceed the specifications of MC1489/MC1489A and are
pin-for-pin replacements.
Schematic and Connection Diagrams
DS1489: R
DS1489A: R
(
1
4
of unit shown)
F
F
= 10k
= 2k
Order Number DS1489M, DS1489MX, DS1489N, DS1489AM, DS1489AMX or DS1489AN
See NS Package Number M14A or N14A
DS005777
Dual-In-Line or Small-Out Line Package
Top View
Features
n Four separate receivers per package
n Programmable threshold
n Built-in input threshold hysteresis
n “Fail safe” operating mode: high output for open inputs
n Inputs withstand
00577702
±
30V
00577701
www.national.com
July 2002

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DS1489A Summary of contents

Page 1

... DS1489 10k F DS1489A Order Number DS1489M, DS1489MX, DS1489N, DS1489AM, DS1489AMX or DS1489AN © 2002 National Semiconductor Corporation Features n Four separate receivers per package n Programmable threshold n Built-in input threshold hysteresis n “Fail safe” operating mode: high output for open inputs n Inputs withstand ...

Page 2

AC Test Circuit and Voltage Waveforms www.DataSheet4U.com www.national.com 00577703 00577704 FIGURE 1. 2 ...

Page 3

... Note 3: Unless otherwise specified min/max limits apply across the 0˚C to +75˚C temperature range for the DS1489 and DS1489A. Note 4: All currents into device pins shown as positive, out of device pins as negative, all voltages referenced to ground unless otherwise noted. All values shown as max or min on absolute value basis ...

Page 4

... Typical Characteristics FIGURE 2. Input Current www.DataSheet4U.com FIGURE 3. DS1489 Input Threshold Voltage Adjustment FIGURE 4. DS1489A Input Threshold Voltage www.national.com V = 5.0V +25˚C unless otherwise noted CC A 00577707 00577708 00577709 Adjustment 4 FIGURE 5. Input Threshold Voltage vs Temperature FIGURE 6. Input Threshold vs Power Supply Voltage FIGURE 7. Noise Rejection vs Capacitance for ...

Page 5

... Typical Application Information *Optional for noise filtering. Noise Filter See Figure 7 www.DataSheet4U.com 00577713 Applications Using the Response Control Pin Threshold Shift See Figures 3, 4 00577714 Application of DS1488, DS1489A and UART 00577716 5 00577705 Noise Filter and Threshold Shift See Figures 00577715 www.national.com ...

Page 6

... Physical Dimensions unless otherwise noted www.DataSheet4U.com www.national.com inches (millimeters) SO Package (M) Order Number DS1489M, DS1489MX or DS1489AM, DS1489AMX NS Package Number M14A 6 ...

Page 7

... National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. inches (millimeters) unless otherwise noted (Continued) Molded Dual-In-Line Package (N) Order Number DS1489N or DS1489AN NS Package Number N14A 2. A critical component is any component of a life ...

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