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| PartNumber | SN74LS166ANSR | SN74LS166AN | SN74LS166ANS |
| Description | Counter Shift Registers Serial-out shift Registers | Counter Shift Registers Serial-out shift Registers | IC SHFT REG PAR-LD 8BIT 16SO |
| 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 | 1 | 4 | - |
| Number of Bits | 8 bit | 8 bit | - |
| Package / Case | SO-16 | PDIP-16 | - |
| Logic Family | LS | 74LS | - |
| Logic Type | Bipolar | Bipolar | - |
| Number of Input Lines | 9 | 4 / 2 | - |
| Propagation Delay Time | 25 ns | 25 ns | - |
| Supply Voltage Min | 4.75 V | - | - |
| 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 | - |
| Features | Parallel Enable Input | - | - |
| Function | Shift Register | Shift Register | - |
| Height | 1.95 mm | - | - |
| Length | 10.3 mm | - | - |
| Operating Temperature Range | 0 C to + 70 C | 0 C to + 70 C | - |
| Series | SN74LS166A | SN74LS166A | - |
| Width | 5.3 mm | 6.35 mm | - |
| Brand | Texas Instruments | Texas Instruments | - |
| Mounting Style | SMD/SMT | Through Hole | - |
| Number of Output Lines | 1 | 2 | - |
| Supply Current Max | 20 mA | - | - |
| Operating Supply Voltage | 5 V | 4.75 V to 5.25 V | - |
| Product Type | Counter Shift Registers | Counter Shift Registers | - |
| Reset Type | Asynchronous | - | - |
| Factory Pack Quantity | 2000 | 25 | - |
| Subcategory | Logic ICs | Logic ICs | - |
| Triggering Type | Positive Edge | - | - |
| Unit Weight | 0.007055 oz | 0.033570 oz | - |