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Texas Instruments CD74ACT174M — Logic ICs

CD74ACT174M D-Type Flip-Flop, 80 MHz, 16-SOIC, -55 to 125°C

MPNCD74ACT174M
End of Life

Texas Instruments 74ACT series D-type flip-flop, CD74ACT174M, single element 6-bit positive-edge triggered with master reset, non-inverted outputs, 80 MHz clock frequency, 4.5V-5.5V supply, 24 mA output drive, 16-SOIC package, -55 to 125°C military temperature range.

$1.62Ref. price · indicative, final on quote
Texas Instruments CD74ACT174M datasheet (PDF)
Packaging16-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Series74ACT
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

CD74ACT174M specifications
ParameterValue
TypeD-Type
Series74ACT
Output typeNon-Inverted
Trigger typePositive Edge
MountingSurface Mount
Supply voltage4.5V ~ 5.5V
Current - quiescent8 µA
Current - output high, low24mA, 24mA
Clock frequency80 MHz
Operating temperature-55°C ~ 125°C (TA)
PackageTube
FunctionMaster Reset
Case16-SOIC (0.154\", 3.90mm Width)
Input capacitance10 pF
Number of elements1
Number of bits per element6
Max propagation delay @ v, max CL14ns @ 5V, 50pF

Product details

74ACT hex D-type with master reset — 80 MHz edge rate in a 5V logic rail

The Texas Instruments CD74ACT174M is a single-element, 6-bit D-type flip-flop from the 74ACT family, clocked on the positive edge with a non-inverted output and an asynchronous master reset. It runs on a 4.5V to 5.5V supply and clocks at 80 MHz, making it a drop-in for 5V TTL/CMOS bus-interface and register applications where you need six bits of storage with a clean reset line. The 24 mA source and sink drive per output gives it the fan-out to drive multiple CMOS loads or a short backplane trace without a buffer.

Military temperature range — the deployment envelope

The 80 MHz clock rate holds across that range, though the propagation delay of 14 ns at 5V and 50 pF load is the figure to budget for timing closure at the cold end, where CMOS switching slows slightly.

Supply rail and quiescent draw

The 4.5V to 5.5V supply range means this part lives on a regulated 5V rail — not 3.3V or 1.8V logic. Quiescent current is 8 µA typical, negligible for the power budget, but the dynamic draw scales with the 80 MHz clock and the 24 mA output switching load. Input capacitance is 10 pF per pin, which matters for the driving gate's rise-time budget when clocking at full speed.

Package and footprint — 16-SOIC narrow-body

Housed in a 16-SOIC narrow-body (3.90 mm width) package, surface-mount only. The 0.154-inch body width is the standard SOIC-16 footprint — no surprises for the PCB layout.

Qualifying a cross from a second manufacturer now avoids a single-source lock-in later.

Frequently asked questions

Can CD74ACT174M replace 74LS174?

Both are 6-bit positive-edge D-type flip-flops with master reset and non-inverted outputs, so the function matches. The CD74ACT174M runs at 80 MHz versus the 74LS174's typical 40 MHz, and the 74ACT family uses CMOS technology with lower quiescent current (8 µA vs roughly 22 mA for LS). The 74LS174 operates from 4.75V to 5.25V and has a 27 ns propagation delay at 5V and 15 pF, while the ACT174 has 14 ns at 5V and 50 pF. Pinout is the same, so it is a direct replacement in most designs, but check the output drive and timing margins — the ACT174's 24 mA drive is higher than the LS174's 8 mA, whic

What is the difference between CD74ACT174M and 74HC174?

Both are 6-bit D-type flip-flops with the same pinout and function. The key difference is the logic family: 74ACT is designed for 5V TTL-compatible input thresholds (TTL levels) while 74HC uses CMOS thresholds (30%/70% of Vcc). At 5V supply, the ACT174 switches at lower input voltages (0.8V max low, 2.0V min high) which makes it directly compatible with older TTL logic outputs. The HC174 needs rail-to-rail CMOS drive. Clock speed and output drive also differ — the ACT174 is rated for 80 MHz and 24 mA output, while typical HC174 parts run at about 50 MHz and 4 mA output. Choose ACT when interfa