| part number | 68A21 |
| manufacturer | Motorola |
| lead free | No |
| prefix | U |
| Description | Peripheral Interface Adapter |
| octopart part number | |
| package | DIP-40 |
| RoHS | No |
| Pulse width, E low | 430 (6821) 280 (68A21) 210 (68B21)ns |
| Max. clock frequency | 1 (6821) 1.5 (68A21) 2 (68B21)MHz |
| Pulse width, E high | 450 (6821) 280 (68A21) 220 (68B21)ns |
| Min. RESET pulse length | 1µs |
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