| part number | MC6821 |
| octopart part number | 1306859206752 |
| manufacturer | MOTOROLA |
| lead free | ??? |
| prefix | U |
| Description | MC6821 |
| imported from octopart | yes |
| package | |
| RoHS | ??? |
| pin 23 activelow | true |
| pin 21 description | read/write select |
| pin 2 description | port A |
| pin 13 description | port B |
| pin 20 description | supply voltage |
| pin 4 description | port A |
| pin 6 description | port A |
| pin 8 description | port A |
| pin 40 description | peripheral control (port A) |
| Max. clock frequency | 1 (6821) 1.5 (68A21) 2 (68B21) MHz |
| pin 36 description | register select (address bus) |
| pin 19 description | peripheral control (port B) |
| pin 16 description | port B |
| pin 25 description | clock |
| pin 37 activelow | true |
| pin 30 description | data bus |
| pin 37 description | interrupt output (active low) |
| pin 33 description | data bus |
| pin 27 description | data bus |
| pin 3 description | port A |
| pin 5 description | port A |
| pin 34 description | master reset (active low) |
| pin 10 description | port B |
| pin 32 description | data bus |
| pin 39 description | peripheral control (port A) |
| Pulse width, E high | 450 (6821) 280 (68A21) 220 (68B21) ns |
| pin 17 description | port B |
| Pulse width, E low | 430 (6821) 280 (68A21) 210 (68B21) ns |
| pin 31 description | data bus |
| pin 14 description | port B |
| pin 18 description | peripheral control (port B) |
| pin 34 activelow | true |
| pin 26 description | data bus |
| pin 15 description | port B |
| pin23 description | chip select (active high) |
| Min. RESET pulse length | 1 µs |
| pin 21 activelow | true |
| pin 28 description | data bus |
| pin 38 activelow | true |
| pin 24 description | chip select (active high) |
| pin 7 description | port A |
| pin 38 description | interrupt output (active low) |
| pin 29-description | data bus |
| pin 12 description | port B |
| pin 9 description | port A |
| pin 11 description | port B |
| pin 1 description | ground |
| pin 22 description | chip select (active high) |
| pin 35 description | register select (address bus) |
Reference Designs (0)
Pricing and Availability
| Supplier | Part Number | # In Stock | |
|---|---|---|---|
| ComponentsMAX | MC6821 | RFQ | Buy Now |
| Vyrian | MC6821 | RFQ | Buy Now |
| ASAP Semiconductor | MC6821 | RFQ | Buy Now |
Total Suppliers: 3
Min Price: 1000000000000
Max Price: 0
Min Price: 1000000000000
Max Price: 0
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