| Configuration | Serial-in, Parallel-out |
| Bits (#) | 8 |
| Technology Family | LS |
| Supply voltage (Min) (V) | 4.75 |
| Supply voltage (Max) (V) | 5.25 |
| Input type | Bipolar |
| Output type | Push-Pull |
| Clock Frequency (MHz) | 25 |
| IOL (Max) (mA) | 8 |
| IOH (Max) (mA) | -0.4 |
| ICC (Max) (uA) | 27000 |
| Features | High speed (tpd 10-50ns) |
- Gated Serial Inputs
- Fully Buffered Clock and Serial Inputs
- Asynchronous Clear
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These 8-bit shift registers feature gated serial inputs and an asynchronous clear. The gated serial inputs (A and B) permit complete control over incoming data as a low at either input inhibits entry of the new data and resets the first flip-flop to the low level at the next clock pulse. A high-level input enables the other input which will then determine the state of the first flip-flop. Data at the serial inputs may be changed while the clock is high or low, but only information meeting the setup-time requirements will be entered. Clocking occurs on the low-to-high-level transition of the clock input. All inputs are diode-clamped to minimize transmission-line effects.
The SN54164 and SN54LS164 are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74164 and SN74LS164 are characterized for operation from 0°C to 70°C.
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