MM54C373

· Wide supply voltage range 3V to 15V
· High noise immunity 0.45 V_CC (typ.)
· Low power consumption
· TTL compatibility Fan out of 1 driving standard TTL
· Bus driving capability
· TRI-STATE outputs
· Eight storage elements in one package
· Single CLOCK/LATCH ENABLE and OUTPUT DISABLE control inputs
· 20-pin dual-in-line package with 0.300× centers takes half the board space of a 24-pin package

The MM54C373/MM74C373, MM54C374/MM74C374 are integrated, complementary MOS (CMOS), 8-bit storage elements with TRI-STATE outputs. These outputs have been specially designed to drive high capacitive loads, such as one might find when driving a bus, and to have a fan out of 1 when driving standard TTL. When a high logic level is applied to the OUTPUT DISABLE input, all outputs of MM54C373 go to a high impedance state, regardless of what signals are present at the other inputs and the state of the storage elements.

The MM54C373/MM74C373 is an 8-bit latch. When LATCH ENABLE is high, the Q outputs will follow the D inputs.

WhenLATCH ENABLE goes low, data at the D inputs, which meets the set-up and hold time requirements, will be retained at the outputs untilLATCH ENABLE returns high again.

The MM54C374/MM74C374 is an 8-bit, D-type, positiveedge triggered flip-flop. Data at the D inputs, meeting the set-up and hold time requirements, is transferred to the Q outputs on positive-going transitions of the CLOCK input.