8-bit D-type register with tri-state outputs
The Fairchild MM74HCT374J is an 8-bit D-type flip-flop from the 74HCT logic family, featuring positive-edge triggering and tri-state, non-inverted outputs. It operates from a 4.5 V to 5.5 V supply and is specified over the industrial temperature range of -40°C to 85°C. The device is packaged in a through-hole DIP, making it suitable for legacy bus-interface designs, address latching, and general-purpose register storage in industrial control, telecom, and test equipment.
30 MHz clock and 46 ns propagation delay — timing budget fit
The 30 MHz maximum clock frequency and 46 ns propagation delay (at 5 V supply, 150 pF load) define the timing margin for bus-oriented designs.
Active lifecycle — no LTB pressure
Note that this variant is RoHS non-compliant (lead-bearing), which may affect its eligibility for new designs under certain environmental compliance programs.
Quiescent current and output drive
Quiescent current is 8 µA typical, keeping the static power draw negligible in battery-backed or low-standby systems. Each output can source or sink 7.2 mA, adequate for driving TTL loads, LED indicators, or the inputs of a following logic stage. The input capacitance is 10 pF per input, a standard load for 5 V CMOS and TTL drivers.