Motorola 6820
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 |
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