Intel 8251

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C8251 from Intel

The Intel 8251 is a programmable serial interface module ( USART , RS-232 ), which for the Intel-8080 / 8085 processors has been developed. The module is supplied in a 28-pin DIL housing . He was u. a. licensed to NEC and Siemens . The transfer rate in asynchronous mode is up to 19,200  baud .

This module is a slightly incompatible variant of the NSC 8250 , which was provided in the IBM PC standard design.

Literature and data sheets

  • Horst Pelka: Practice with microprocessors , 2nd edition, Franzis-Verlag, Munich 1980, ISBN 3-7723-6582-5 , pp. 58-72.
  • Andreas Stiller: All about the timer , c't, 1988, issue 4.
  • Intel Datasheet: 8251A Programmable communication interface
  • Microcomputer modules, data book 1979/80, volume 3, peripherals, Siemens AG, order number B 2049, pp. 64-101.
  • NEC Electronics (Europe) GmbH, 1982 Catalog, pp. 631-648.