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| Part Number | 74AC161PC | 74ACT161PC | 74AC163PC | 74AC169PC | 74AC161SC | 74AC191PC |
|---|---|---|---|---|---|---|
| Manufacturer | Fairchild Semiconductor | Fairchild Semiconductor | Fairchild Semiconductor | Fairchild Semiconductor | onsemi | onsemi |
| Product Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
| Logic Type | Binary Counter | Binary Counter | Binary Counter | Binary Counter | Binary Counter | Binary Counter |
| Direction | Up | Up | Up | Up, Down | Up | Up, Down |
| Number of Elements | 1 | 1 | 1 | 1 | 1 | 1 |
| Number of Bits per Element | 4 | 4 | 4 | 4 | 4 | 4 |
| Reset | Asynchronous | Asynchronous | Synchronous | - | Asynchronous | - |
| Timing | Synchronous | Synchronous | Synchronous | Synchronous | Synchronous | Synchronous |
| Count Rate | 167 MHz | 125 MHz | 140 MHz | 154 MHz | 167 MHz | 133 MHz |
| Trigger Type | Positive Edge | Positive Edge | Positive Edge | Positive Edge | Positive Edge | Positive Edge |
| Voltage - Supply | 2 V ~ 6 V | 4.5 V ~ 5.5 V | 2 V ~ 6 V | 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 | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole | Surface Mount | Through Hole |
| Package / Case | 16-DIP (0.300", 7.62mm) | 16-DIP (0.300", 7.62mm) | 16-DIP (0.300", 7.62mm) | 16-DIP (0.300", 7.62mm) | 16-SOIC (0.154", 3.90mm Width) | 16-DIP (0.300", 7.62mm) |
| Supplier Device Package | 16-PDIP | 16-PDIP | 16-PDIP | 16-PDIP | 16-SOIC | 16-PDIP |
