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| Part Number | 74AC161SCX | 74AC163SCX | 74ACT161SCX | 74AC161SJX | 74AC169SCX | 74AC191SCX | 74AC161SC |
|---|---|---|---|---|---|---|---|
| Manufacturer | Fairchild Semiconductor | Fairchild Semiconductor | Fairchild Semiconductor | Fairchild Semiconductor | onsemi | onsemi | onsemi |
| Product Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
| Logic Type | Binary Counter | Binary Counter | Binary Counter | Binary Counter | Binary Counter | Binary Counter | Binary Counter |
| Direction | Up | Up | Up | Up | Up, Down | Up, Down | Up |
| Number of Elements | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Number of Bits per Element | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Reset | Asynchronous | Synchronous | Asynchronous | Asynchronous | - | - | Asynchronous |
| Timing | Synchronous | Synchronous | Synchronous | Synchronous | Synchronous | Synchronous | Synchronous |
| Count Rate | 167 MHz | 140 MHz | 125 MHz | 167 MHz | 154 MHz | 133 MHz | 167 MHz |
| Trigger Type | Positive Edge | Positive Edge | Positive Edge | Positive Edge | Positive Edge | Positive Edge | Positive Edge |
| Voltage - Supply | 2 V ~ 6 V | 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 | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 16-SOIC (0.154", 3.90mm Width) | 16-SOIC (0.154", 3.90mm Width) | 16-SOIC (0.154", 3.90mm Width) | 16-SOIC (0.209", 5.30mm Width) | 16-SOIC (0.154", 3.90mm Width) | 16-SOIC (0.154", 3.90mm Width) | 16-SOIC (0.154", 3.90mm Width) |
| Supplier Device Package | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOP | 16-SOIC | 16-SOIC | 16-SOIC |
