| PartNumber | SN74LS166ADR | SN74LS166AD | SN74LS166ADG4 |
| Description | Counter Shift Registers Serial-out shift Registers | Counter Shift Registers Serial-out shift Registers | Counter Shift Registers Serial Out Shift Registers |
| Manufacturer | Texas Instruments | Texas Instruments | - |
| Product Category | Counter Shift Registers | Counter Shift Registers | - |
| RoHS | Y | Y | - |
| Counting Sequence | Serial/Parallel to Serial | Serial/Parallel to Serial | - |
| Number of Circuits | 4 | 4 | - |
| Number of Bits | 8 bit | 8 bit | - |
| Package / Case | SOP-16 | SOP-16 | - |
| Logic Family | 74LS | 74LS | - |
| Logic Type | Bipolar | Bipolar | - |
| Number of Input Lines | 4 / 2 | 4 / 2 | - |
| Propagation Delay Time | 25 ns | 25 ns | - |
| Supply Voltage Max | 5.25 V | 5.25 V | - |
| Minimum Operating Temperature | 0 C | 0 C | - |
| Maximum Operating Temperature | + 70 C | + 70 C | - |
| Packaging | Reel | Tube | - |
| Function | Shift Register | Shift Register | - |
| Operating Temperature Range | 0 C to + 70 C | 0 C to + 70 C | - |
| Series | SN74LS166A | SN74LS166A | - |
| Width | 3.91 mm | 3.91 mm | - |
| Brand | Texas Instruments | Texas Instruments | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Number of Output Lines | 2 | 2 | - |
| Operating Supply Voltage | 4.75 V to 5.25 V | 4.75 V to 5.25 V | - |
| Product Type | Counter Shift Registers | Counter Shift Registers | - |
| Factory Pack Quantity | 2500 | 40 | - |
| Subcategory | Logic ICs | Logic ICs | - |
| Unit Weight | 0.004998 oz | 0.004998 oz | - |