onsemi SN74LS194A
The SN74LS194A is a High Speed 4-Bit Bidirectional Universal Shift Register. It may be used in serial-serial, shift left, shift right, serial-parallel, parallel-serial, and parallel-parallel data register transfers. The LS194A is similar in operation to the LS195A Universal Shift Register, with added features of shift left without external connections and hold (do nothing) modes of operation.
| Part No. |
SN74LS194A |
| Datasheet |
SN74LS194A
Download
|
| Manufacturer |
 onsemi |
| Description |
4-Bit Bidirectional Universal Shift Register |
| Buy |
Stock & Price
|
DESCRIPTION
The Logic Diagram and Truth Table indicate the functional characteristics of the LS194A 4-Bit Bidirectional Shift Register. The LS194A is similar in operation to the ON Semiconductor LS195A Universal Shift Register when used in serial or parallel data register transfers. Some of the common features of the two devices are described below: All data and mode control inputs are edge-triggered, responding only to the LOW to HIGH transition of the Clock (CP). The only timing restriction, therefore, is that the mode control and selected data inputs must be stable one set-up time prior to the positive transition of the clock pulse. The register is fully synchronous, with all operations taking place in less than 15 ns (typical) making the device especially useful for implementing very high speed CPUs, or the memory buffer registers. The four parallel data inputs (P0, P1, P2, P3) are D-type inputs. When both S0 and S1 are HIGH, the data appearing on P0, P1, P2, and P3 inputs is transferred to the Q0, Q1, Q2, and Q3 outputs respectively following the next LOW to HIGH transition of the clock.
