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Texas Instruments CD74HCT74E — Logic ICs

CD74HCT74E D-Type Flip-Flop, 50 MHz, 14-PDIP, -55°C to 125°C

MPNCD74HCT74E
End of Life

Texas Instruments 74HCT series D-Type flip-flop, CD74HCT74E, dual 1-bit positive-edge triggered, set/preset and reset, complementary outputs, 50 MHz clock, 4.5V-5.5V supply, 14-PDIP, -55°C to 125°C.

$0.62Ref. price · indicative, final on quote
Packaging14-DIP (0.300", 7.62mm)
RoHSROHS3 Compliant
Series74HCT
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

CD74HCT74E specifications
ParameterValue
TypeD-Type
Series74HCT
Output typeComplementary
Trigger typePositive Edge
MountingThrough Hole
Supply voltage4.5V ~ 5.5V
Current - quiescent4 µA
Current - output high, low4mA, 4mA
Clock frequency50 MHz
Operating temperature-55°C ~ 125°C (TA)
PackageTube
FunctionSet(Preset) and Reset
Case14-DIP (0.300\", 7.62mm)
Input capacitance10 pF
Number of elements2
Number of bits per element1
Max propagation delay @ v, max CL35ns @ 4.5V, 50pF

Product details

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.

The 14-PDIP package (0.300" wide, 7.62 mm pitch) is socket-friendly for prototyping and field service.

It is also RoHS3 compliant.

Frequently asked questions

What is the difference between CD74HCT74E and CD74HC74E?

Both are dual D-type flip-flops with the same pinout and function. The CD74HCT74E uses HCT logic (TTL-compatible input thresholds at 5 V), while the CD74HC74E uses HC logic (CMOS input thresholds). If your system already has TTL-level signals, the HCT variant is the direct drop-in.

Is CD74HCT74E RoHS compliant?

Yes, the CD74HCT74E is RoHS3 compliant per the manufacturer's specification.

How do I replace CD74HCT74E with a surface mount version?

The 74HCT family includes surface-mount alternatives in SOIC-14 (CD74HCT74M) or TSSOP-14 packages. Verify the pinout matches — same dual D-type function with set/reset — and adjust the PCB footprint accordingly. The electrical specs (50 MHz, 4.5 V-5.5 V, -55°C to 125°C) are identical across the package variants.