Motorola 6821

The Motorola 6821  (P/N 156-0427-03,156-1205-00) is a "Peripheral Interface Adapter (PIA)" monolithic integrated circuit is an I/O port controller for the Motorola 6800 family of microprocessors.

It is an updated version of the Motorola 6820 with slightly different specs.

It was second-sourced by several other companies. The 68B21 (156-1205-00) is a 2 MHz version.

Used in

Some instruments using part Motorola 6821

Instrument	Manufacturer	Class	Model	Description	Introduced
067-1137-99	Tektronix	Plug-in	067-1137-99	GPIB-to-accessory controller	1984
4052	Tektronix	Computer	4052	Graphics-capable desktop microcomputer	1978
4052A	Tektronix	Computer	4052A	Graphics-capable desktop microcomputer	1983
4054	Tektronix	Computer	4054	Graphics-capable desktop microcomputer	1978
4054A	Tektronix	Computer	4054A	Graphics-capable desktop microcomputer	1983
7250	Tektronix	Oscilloscope	7250	6 GHz Transient Digitizer	1986
7A16P	Tektronix	Plug-in	7A16P	150/200 MHz vertical amplifier	1978
7A29P	Tektronix	Plug-in	7A29P	1 GHz programmable amplifier	1988
7B90P	Tektronix	Plug-in	7B90P	400 MHz programmable timebase	1978
CG5001	Tektronix	Plug-in	CG5001	programmable calibration generator	1983
CG5010	Tektronix	Plug-in	CG5010	programmable calibration generator	1990
CG5011	Tektronix	Plug-in	CG5011	programmable calibration generator	1990
CG551AP	Tektronix	Plug-in	CG551AP	programmable calibration generator	1980
Keithley 191	Keithley	Multimeter	191	5½-digit multimeter	1979

Links

• Peripheral Interface Adapter @ Wikipedia

Pictures

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