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| PartNumber | N74F191 | N74F191D | N74F191N |
| Description | Counter, Up/Down, 4 Bit Binary, 16 Pin, Plastic, SOP | Counter, Up/Down, 4 Bit Binary, 16 Pin, Plastic, DIP | |
| Manufacturer | - | NXP Semiconductors | NXP Semiconductors |
| Product Category | - | Logic - Counters, Dividers | Logic - Counters, Dividers |
| Series | - | 74F | 74F |
| Packaging | - | Tube | Tube |
| Package Case | - | 16-SOIC (0.154", 3.90mm Width) | 16-DIP (0.300", 7.62mm) |
| Operating Temperature | - | 0°C ~ 70°C | 0°C ~ 70°C |
| Mounting Type | - | Surface Mount | Through Hole |
| Direction | - | Up, Down | Up, Down |
| Voltage Supply | - | 4.5 V ~ 5.5 V | 4.5 V ~ 5.5 V |
| Supplier Device Package | - | 16-SO | 16-DIP |
| Number of Elements | - | 1 | 1 |
| Logic Type | - | Binary Counter | Binary Counter |
| Number of Bits per Element | - | 4 | 4 |
| Reset | - | - | - |
| Timing | - | Asynchronous | Asynchronous |
| Count Rate | - | 125MHz | 125MHz |
| Trigger Type | - | Positive Edge | Positive Edge |