| Part Number | 74ACT161SCX | 74ACT161SJX | 
|---|---|---|
| Manufacturer | Fairchild Semiconductor | Fairchild Semiconductor | 
| Category | Logic - Counters, Dividers | Logic - Counters, Dividers | 
|   |   | |
| Product Status | Obsolete | Obsolete | 
| Logic Type | Binary Counter | Binary Counter | 
| Direction | Up | Up | 
| Number of Elements | 1 | 1 | 
| Number of Bits per Element | 4 | 4 | 
| Reset | Asynchronous | Asynchronous | 
| Timing | Synchronous | Synchronous | 
| Count Rate | 125 MHz | 125 MHz | 
| Trigger Type | Positive Edge | Positive Edge | 
| Voltage - Supply | 4.5 V ~ 5.5 V | 4.5 V ~ 5.5 V | 
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | 16-SOIC (0.154", 3.90mm Width) | 16-SOIC (0.209", 5.30mm Width) | 
| Supplier Device Package | 16-SOIC | 16-SOP |