A serial bus transceiver for the automotive environment

Author

Moriarty, John K., Jr. ; Jones, R. Clifton ; Dinkledine, Thomas L.

Author_Institution

Delco Electron. Corp., Kokomo, IN, USA

Volume

23

Issue

2

fYear

1988

fDate

4/1/1988 12:00:00 AM

Firstpage

450

Lastpage

456

Abstract

A custom monolithic integrated circuit used as a direct interface between a single-wire data link and microcomputer assemblies in the harsh automotive environment is described. Unusual circuitry allows operation from a single 5-V supply with a grounded substrate despite 6-V ground differences between the nodes. The IC features a 10-mA tristate output with a voltage swing to within 1/2 V of each rail. In addition, the output maintains the high-impedance state during loss of ground and through shorts to -16 and +16 V, remains stable for unlimited capacitive loads, and provides protection from short circuits and high-voltage transients. On-chip waveshaping referenced to an external RC time constant approximates a third-order filter for precise control of rise times and radiated noise in transmitted data. The differential receiver accepts voltage levels from -6 to +12 V and filters input signals for noise immunity. Bit rates to 9600 baud are possible in the described application

Keywords

VLSI; automobiles; bipolar integrated circuits; computer interfaces; electromagnetic compatibility; transceivers; 10 mA; 16 V; 5 V; 9600 bit/s; ASIC; HV transients protection; VLSI; automotive electronics; automotive environment; bipolar IC; capacitive loads; control of rise times; custom ICs; custom monolithic integrated circuit; differential receiver; direct interface; external RC time constant; filters input signals; grounded substrate; microcomputer assemblies; noise immunity; onchip waveshaping; operation; protection from short circuits; serial bus transceiver; single 5-V supply; single-wire data link; third-order filter; tristate output; voltage levels; voltage swing; Assembly; Automotive engineering; Circuit noise; Filters; Microcomputers; Monolithic integrated circuits; Protection; Rails; Transceivers; Voltage;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.1006

Filename

1006