| PartNumber | SN74ALS191AD | SN74ALS191ADR | SN74ALS191ADG4 |
| Description | Counter ICs 4bit Synch Up/Dn | Counter ICs 4-Bit Synch Up/Down Binary Counter | Counter ICs 4B Synch Up Down Binary Counters |
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Category | Counter ICs | Counter ICs | Counter ICs |
| RoHS | Y | Y | Y |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | SOP-16 | SOP-16 | SOP-16 |
| Counter Type | Binary | Binary | Binary |
| Logic Family | ALS | ALS | ALS |
| Number of Bits | 4 bit | 4 bit | 4 bit |
| Counting Sequence | Up/Down | Up/Down | Up/Down |
| Operating Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Minimum Operating Temperature | 0 C | 0 C | 0 C |
| Maximum Operating Temperature | + 70 C | + 70 C | + 70 C |
| Series | SN74ALS191A | SN74ALS191A | SN74ALS191A |
| Packaging | Tube | Reel | Tube |
| Function | Counter | Counter | Counter |
| Operating Temperature Range | 0 C to + 70 C | 0 C to + 70 C | 0 C to + 70 C |
| Output Current | 8 mA/- 0.4 mA | 8 mA/- 0.4 mA | 8 mA/- 0.4 mA |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Type | Counter ICs | Counter ICs | Counter ICs |
| Factory Pack Quantity | 40 | 2500 | 40 |
| Subcategory | Counter ICs | Counter ICs | Counter ICs |
| Unit Weight | 0.004998 oz | 0.004998 oz | 0.004998 oz |
| Counting Method | - | - | Synchronous |