| Configuration | Serial-in, Parallel-out |
| Bits (#) | 8 |
| Technology Family | ALS |
| Supply voltage (Min) (V) | 4.5 |
| Supply voltage (Max) (V) | 5.5 |
| Input type | Bipolar |
| Output type | Push-Pull |
| Clock Frequency (MHz) | 50 |
| IOL (Max) (mA) | 8 |
| IOH (Max) (mA) | -0.4 |
| ICC (Max) (uA) | 24000 |
| Features | High speed (tpd 10-50ns) |
- AND-Gated (Enable/Disable) Serial Inputs
- Fully Buffered Clock and Serial Inputs
- Direct Clear
- Package Options Include Plastic Small-Outline (D) Packages and Standard Plastic (N) 300-mil DIPs
This 8-bit parallel-out serial shift register features AND-gated serial (A and B) inputs and an asynchronous clear (CLR\) input. The gated serial inputs permit control over incoming data because 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 determines the state of the first flip-flop. Data at the serial inputs can be changed while the clock is high or low, provided that the minimum setup-time requirements are met. Clocking occurs on the low-to-high-level transition of the clock (CLK) input. All inputs are diode clamped to minimize transmission-line effects.
The SN74ALS164A is characterized for operation from 0°C to 70°C.