M74HC323

The M54/74HC299/323 are high speed CMOS 8- BIT PIPO SHIFT REGISTERS (3-STATE) fabricated with silicon gate C²MOS technology.

They achieve the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power consumption.

These devices have four modes (HOLD, SHIFT LEFT,SHIFT RIGHTand LOADDATA). Each mode is chosen by two function select inputs (S0, S1). When one or both enable inputs, (G1, G2) are high, the eight input/output terminals are in the highimpedance state ; however sequential operation or clearing of the register is not affected.

Clear function on the HC299 is asynchronous to CLOCK,while the HC323 is cleared synchronous to clock.

All inputs are equipped with protection circuits against static discharge and transient excess voltage.