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| Part Number | SN74HC191NS | SN74HC191NSR | SN74HC191NS |
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments |
| Series | 74HC | 74HC | 74HC |
| Package/Case | 16-SOIC (0.209", 5.30mm Width) | 16-SOIC (0.209", 5.30mm Width) | 16-SOIC (0.209", 5.30mm Width) |
| Packaging | Bulk | Tape & Reel (TR) | Tube |
| Product Status | Active | Active | Obsolete |
| Logic Type | Binary Counter | Binary Counter | Binary Counter |
| Direction | Up, Down | Up, Down | Up, Down |
| Number of Elements | 1 | 1 | 1 |
| Number of Bits per Element | 4 | 4 | 4 |
| Reset | Asynchronous | Asynchronous | Asynchronous |
| Timing | Synchronous | Synchronous | Synchronous |
| Count Rate | 24 MHz | 24 MHz | 48 MHz |
| Trigger Type | Positive Edge | Positive Edge | Positive Edge |
| Voltage - Supply | 2 V ~ 6 V | 2 V ~ 6 V | 2 V ~ 6 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C (TA) |
| Grade | - | - | - |
| Qualification | - | - | - |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount |
| Supplier Device Package | 16-SO | 16-SO | 16-SO |
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