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| Part Number | SN74LS49 |
| Description | BCD-TO-SEVEN-SEGMENT DECODERS/DRIVERS |
| Info | SN5446A, ’47A, ’48, SN54LS47, ’LS48, ’LS49. |
| Manufacture | etcTI |
| for PC | Download SN74LS49 Datasheet |
| Part Number | SN74LS490 |
| Description | DUAL DECADE COUNTER |
| Info | DUAL DECADE COUNTER The SN54 / 74LS490 contains a . |
| Manufacture | Motorola |
| for PC | Download SN74LS490 Datasheet |
| Part Number | SN74LS491A |
| Description | 10-Bit Counter |
| Info | . |
| Manufacture | Monolithic Memories |
| for PC | Download SN74LS491A Datasheet |