What the CD74HCT74E is and where it fits
The Texas Instruments CD74HCT74E is a dual D-type flip-flop from the 74HCT logic family, packaged in a 14-lead PDIP for through-hole assembly. Each flip-flop has independent set (preset) and reset inputs, positive-edge clock triggering, and complementary Q and Q̅ outputs. It operates from a 4.5 V to 5.5 V supply and draws only 4 µA quiescent current.
50 MHz clock — timing budget for the bus
Rated at 50 MHz clock frequency, this flip-flop handles moderate-speed synchronous logic — state machines, address latching, or register pipelines in industrial controllers and telecom line cards. Propagation delay is 35 ns max at 4.5 V with a 50 pF load, which sets the hold-time margin for back-to-back flip-flop stages. At 15 MHz the DM7474N is a slower alternative, but the 74HCT's 50 MHz ceiling gives more headroom in the timing budget.
Military temperature range — -55°C to 125°C
Rated for -55°C to 125°C ambient, the CD74HCT74E suits avionics, satellite, downhole instrumentation, and outdoor telecom enclosures where commercial-grade parts cannot survive. The 14-PDIP package (0.300" wide, 7.62 mm pitch) is socket-friendly for prototyping and field service.
Active lifecycle — no LTB pressure
The CD74HCT74E carries an Active lifecycle status per the manufacturer. It is also RoHS3 compliant. For new designs or production replenishment, this part is available through independent distribution and can be quoted to order.