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Product details

Parameters

Supply voltage(s) (Nom) (V) 5 Number of TX 2 Number of RX 0 Duplex Signaling rate (Max) (Mbps) 15 IEC 61000-4-2 contact (+/- kV) None HBM ESD (kV) None Fault protection (V) -15 to 15 Number of nodes 32 Common mode range -7 to 7 ICC (Max) (mA) 65 Isolated No Rating Catalog Operating temperature range (C) 0 to 70 Approx. price (US$) 0.22 | 1ku open-in-new Find other RS-485 & RS-422 transceivers

Package | Pins | Size

PDIP (P) 8 93 mm² 9.81 x 9.43 SOIC (D) 8 19 mm² 3.91 x 4.9 open-in-new Find other RS-485 & RS-422 transceivers

Features

  • Meets or Exceeds ANSI Standard EIA/TIA-422-B
  • Operates From a Single 5-V Power Supply
  • Drives Loads as Low as 50 up to 15 Mbps
  • TTL- and CMOS-Input Compatibility
  • Output Short-Circuit Protection
  • Interchangeable With National SemiconductorTM DS9638

    National Semiconductor is a trademark of National Semiconductor Corporation.

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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 0°C to 70°C.

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Technical documentation

= Featured
No results found. Please clear your search and try again. View all 5
Type Title Date
* Datasheet Dual High-Speed Differential Line Driver datasheet (Rev. C) Apr. 01, 1994
Technical articles Small doesn’t mean you compromise performance when implementing signal isolation May 25, 2017
Technical articles Upgrading the standard: a better way to drive peripherals Jun. 20, 2014
Technical articles How Thunderbolt™ 2 enables 4k video resolution Apr. 03, 2014
Technical articles Going for distance or going for speed on the RS-485 bus? Mar. 05, 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Design tools & simulation

SIMULATION TOOLS Download
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide

CAD/CAE symbols

Package Pins Download
PDIP (P) 8 View options
SOIC (D) 8 View options

Ordering & quality

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Videos

RS-485 Overview

This training video provides an overview of the RS-485 standard the basics, the benefits and the reasons to choose RS-485 over other standards.

Posted: 03-Jan-2017
Duration: 19:28

View TI's RS-485 portfolio

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