The 8251 is a Universal Synchronous/Asynchronous Receiver/Transmitter packaged in a 28-pin DIP made by Intel. It is typically used for serial communication and was rated for 19.2 kilobits per second signalling rate.
It includes 5 sections
- read/write control logic
- data bus system
- modem control
There is a version of 8251A available for USD $6.40 in quantity of 100.
- Mikrocomputer Bausteine, Datenbuch 1979/80, Band 3, Peripherie, Siemens AG, Bestellnummer B 2049, pp. 64–101.
- NEC Electronics (Europe) GmbH, 1982 Catalog, pp. 631–648
- Intel peripherals enhance 8086 system design, Intel Preview Special Issue: 16-Bit Solutions, Intel Corporation, May/June 1980, page 22sundra