Motorola 6820

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The Motorola 6820  (P/N 156-0427-00) is a "Peripheral Interface Adapter (PIA)" monolithic integrated circuit is an I/O port controller for the Motorola 6800 family of microprocessors.

The Motorola 6821 is an updated version with slightly different electrical specs.

Other manufacturer's versions with various electrical differences are

  • WDC – W65C21S
  • CMD/GTE – G65SC21
  • Hitachi – HD6821, HD6321 (CMOS)
  • MOS Technology – 6521
  • Rockwell – R6520, R6521, R65C21
  • ST Micro – EF6821

Used in

Some instruments using part Motorola 6820

Instrument Manufacturer Class Model Description Introduced
021-0206-00 Tektronix Interface 021-0206-00 GPIB Interface for P7001 (?)
7A16P Tektronix Plug-in 7A16P 150/200 MHz vertical amplifier 1978
7B81P Tektronix Plug-in 7B81P programmable timebase (?)
7B90P Tektronix Plug-in 7B90P 400 MHz programmable timebase 1978
Keithley 175A Keithley Multimeter 175A 4½-digit TRMS digital multimeter (?)
Keithley 197 Keithley Multimeter 197 5½-digit digital multimeter (?)
Keithley 485 Keithley Multimeter 485 Digital picoamperemeter (?)
Keithley 580 Keithley Multimeter 580 5½-digit microohmmeter 1985

Links

Pictures

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