| 型号 | 厂家 | 描述 | 大小 | 页数 | 厂家标志 |
|---|---|---|---|---|---|
| HD74AC139FP-EL | KB | ||||
| HD74192P | Synchronous Up/Down Counter | 158 KB | 0 | ||
| HD7420 | Hitachi Semiconductor | TTL HD74/HD74S Series | 143 KB | 4 |  |
| HD74312R | Hitachi Semiconductor | TTL HD74/HD74S Series | 143 KB | 4 | |
| HD74164 | Hitachi Semiconductor | TTL HD74/HD74S Series | 143 KB | 4 | |
