| Manufacturer | Part Number | Description |
|---|---|---|
STMicroelectronics
| T74LS191 | (T74LS190 / T74LS191) Presettable Up/Down Counters |
|
STMicroelectronics
| T74LS190 | (T74LS190 / T74LS191) Presettable Up/Down Counters |
| SGS-Ates Componenti Electronici | T74LS190 | (T74LS190 / T74LS191) Presettable Up/Down Counters |
| SGS-Ates Componenti Electronici | T74LS191 | (T74LS190 / T74LS191) Presettable Up/Down Counters |
