| Manufacturer | Part Number | Description |
|---|---|---|
Texas Instruments
| SN54LS191 | SYNCHRONOUS UP/DOWN COUNTERS |
Motorola Semiconductor (now NXP Semiconductors)
| 54LS191 | PRESETTABLE BCD/DECADE UP/DOWN COUNTERS |
|
Motorola Semiconductor (now NXP Semiconductors)
| SN54LS191 | PRESETTABLE BCD/DECADE UP/DOWN COUNTER |
|
Texas Instruments
| 54LS191 | SYNCHRONOUS UP/DOWN COUNTERS |
National Semiconductor (now Texas Instruments)
| DM54LS191 | Synchronous 4-Bit Up/Down Counters |
