These Schottky TTL eight-bit universal registers feature multiplexed inputs/outputs to achieve full eight-bit data handling in a single 20-pin package. Two function-select inputs and two output-control inputs can be used to choose the modes of operation listed in the function table.
Synchronous parallel loading is accomplished by taking both function-select lines, S0 and S1, high. This places the three-state outputs in a high-impedance state, which permits data that is applied on the input/output lines to be clocked into the register. Reading out of the register can be accomplished while the outputs are enabled in any mode. A direct overriding input is provided to clear the register whether the outputs are enabled or off.
| Configuration | Universal |
| 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) | 24 |
| IOH (max) (mA) | -2.6 |
| Supply current (max) (µA) | 53000 |
| Features | High speed (tpd 10-50ns) |
| Operating temperature range (°C) | -55 to 125 |
| Rating | Military |
| CDIP (J) | 20 | 167.464 mm² 24.2 x 6.92 |
| CFP (W) | 20 | 90.5828 mm² 13.09 x 6.92 |
| LCCC (FK) | 20 | 79.0321 mm² 8.89 x 8.89 |
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