SN74F323
8-BIT UNIVERSAL SHIFT-STORAGE REGISTER
WITH SYNCHRONOUS CLEAR AND 3-STATE OUTPUTS

SDFS072A - D2932, MARCH 1987 - REVISED OCTOBER 1993

features

• Four Modes of Operation:
  • Hold (Store)
  • Shift Right
  • Shift Left
  • Load Data
• Operates With Outputs Enabled or at High Impedance
• 3-State Outputs Drive Bus Lines Directly
• Can Be Cascaded for N-Bit Word Lengths
• Synchronous Clear
• Applications:
  • Stacked or Push-Down Registers
  • Buffer Storage
  • Accumulator Registers
• Package Options Include Plastic Small-Outline Packages and Standard Plastic 300-mil DIPs

description

This 8-bit universal register features multiplexed I/O ports to achieve full 8-bit data handling in a single 20-pin package. Two function-select (S0, S1) and two output-enable (, ) inputs can be used to choose the modes of operation listed in the function table.

Synchronous parallel loading is accomplished by taking both S0 and S1 high. This places the 3-state outputs in a high-impedance state and permits data that is applied on the I/O ports to be clocked into the register. Reading out of the register can be accomplished while the outputs are enabled in any mode. Clearing occurs synchronously when the clear () input is low. Taking either or high disables the outputs but this has no effect on clearing, shifting, or storage of data.

The SN74F323 is characterized for operation from 0°C to 70°C.