HD74LS194AP
HD74LS194AP is 4-bit Bidirectional Universal Shift Register manufactured by Renesas.
- Part of the HD74LS194A comparator family.
- Part of the HD74LS194A comparator family.
features a system designer may want in a shift register. The circuit contains 46 equivalent gates and features parallel inputs, parallel outputs, right-shift and leftshift serial inputs. Operating-mode-control inputs, and a direct overriding clear line. The register has four distinct modes of operation, namely;
- Parallel (broadside) load
- Shift right (in the direction QA toward QD)
- Shift left (in the direction QD toward QA)
- Inhibit clock (do nothing)
Synchronous parallel loading is acplished by applying the four bits of data and taking both mode control inputs, S0 and S1, high. The data are loaded into the associated flip-flops and appear at the outputs after the positive transition of the clock input. During loading, serial data flow is inhibited. Shift right is acplished synchronously with the rising edge of the clock pulse when S0 is high and S1 is low. Serial data for this mode is entered at the shift-right data input. When S0 is low and S1 is high, data shifts left synchronously and new data is entered at the shift-left serial input.
Clocking of the flip-flop is inhibited when both mode control inputs are low.
- Ordering Information
Part Name
Package Type
Package Code (Previous Code)
Package Abbreviation
DILP-16 pin
PRDP0016AE-B
(DP-16FV)
HD74LS194AFPEL SOP-16 pin (JEITA)
PRSP0016DH-B
(FP-16DAV)
Note: Please consult the sales office for the above package availability.
Taping Abbreviation (Quantity)
- EL (2,000 pcs/reel)
Pin Arrangement
Clear 1
Shift Right Serial Input
A3
Parallel B 4 Inputs C 5
D6
Shift Left Serial Input
GND...
