| PartNumber | 74ACT161MTR | 74ACT161SC | 74ACT161PC |
| Description | Counter Shift Registers 4-Bit Binary Counter | Counter Shift Registers Syn Binary Counter | Counter Shift Registers Syn Binary Counter |
| Manufacturer | STMicroelectronics | ON Semiconductor | ON Semiconductor |
| Product Category | Counter Shift Registers | Counter Shift Registers | Counter Shift Registers |
| RoHS | Y | Y | Y |
| Counter Type | Presettable | Binary | Binary |
| Counting Sequence | Up | Up | Up |
| Number of Circuits | 1 | 1 | 1 |
| Number of Bits | 4 bit | 4 bit | 4 bit |
| Package / Case | SO-16 | SOIC-16 | PDIP-16 |
| Logic Family | 74ACT | 74ACT | 74ACT |
| Logic Type | CMOS | CMOS | CMOS |
| Number of Input Lines | 4 | 4 | 4 |
| Propagation Delay Time | 9.5 ns | 10.5 ns | 10.5 ns |
| Supply Voltage Max | 5.5 V | 5.5 V | 5.5 V |
| Minimum Operating Temperature | - 55 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 125 C | + 85 C | + 85 C |
| Packaging | Reel | Tube | Tube |
| Function | Advanced high-speed CMOS | Counter | Counter |
| Series | 74AC161 | - | - |
| Width | 4 mm | 4 mm | 6.6 mm |
| Brand | STMicroelectronics | ON Semiconductor / Fairchild | ON Semiconductor / Fairchild |
| Mounting Style | SMD/SMT | SMD/SMT | Through Hole |
| Number of Output Lines | 4 | 4 | 4 |
| Operating Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Product Type | Counter Shift Registers | Counter Shift Registers | Counter Shift Registers |
| Factory Pack Quantity | 2500 | 48 | 25 |
| Subcategory | Logic ICs | Logic ICs | Logic ICs |
| Unit Weight | 0.007079 oz | 0.023492 oz | 0.057419 oz |
| Part # Aliases | - | 74ACT161SC_NL | - |