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Texas Instruments SN74HCT273PW — Logic ICs

SN74HCT273PW TI D-Type Flip-Flop, 37 MHz, 20-TSSOP

MPNSN74HCT273PW
End of Life

Texas Instruments 74HCT series D-Type flip-flop, SN74HCT273PW, 8-bit, non-inverted output, positive edge trigger, master reset, 37 MHz, 4.5-5.5V supply, -40 to 85°C, 20-TSSOP.

$1.33Ref. price · indicative, final on quote
Texas Instruments SN74HCT273PW datasheet (PDF)
Packaging20-TSSOP (0.173", 4.40mm Width)
RoHSROHS3 Compliant
Series74HCT
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SN74HCT273PW specifications
ParameterValue
TypeD-Type
Series74HCT
Output typeNon-Inverted
Trigger typePositive Edge
MountingSurface Mount
Supply voltage4.5V ~ 5.5V
Current - quiescent8 µA
Current - output high, low4mA, 4mA
Clock frequency37 MHz
Operating temperature-40°C ~ 85°C (TA)
PackageTube
FunctionMaster Reset
Case20-TSSOP (0.173\", 4.40mm Width)
Input capacitance3 pF
Number of elements1
Number of bits per element8
Max propagation delay @ v, max CL29ns @ 5.5V, 50pF

Product details

8-bit register with master reset — what it does on the board

The Texas Instruments SN74HCT273PW is a single-element 8-bit D-type flip-flop with a master reset input. It captures data on the positive edge of the clock and holds it until the next clock edge or until the reset line is asserted. The non-inverted outputs drive up to 4 mA per pin, enough for most TTL-level loads or to drive a bus transceiver input. The master reset pin is asynchronous — pulling it low clears all eight registers immediately, regardless of the clock state. This makes the part useful for power-on reset state machines, data latching in microcontroller systems, and address/control register banks in industrial logic.

There is no last-time-buy or end-of-life notice.

Frequently asked questions

What is the difference between SN74HCT273PW and SN74HC273PW?

The HCT version (SN74HCT273PW) has TTL-compatible input thresholds, while the HC version uses CMOS-level thresholds. In a 5V system driven by TTL outputs, the HCT part provides better noise margin. Both share the same pinout and timing specifications, so they are interchangeable in most designs if the input drive levels are compatible.

Is SN74HCT273PW lead-free?

Yes, the SN74HCT273PW is ROHS3 compliant, meaning it meets the EU RoHS directive for lead-free and other restricted substances.

What is the typical propagation delay of 74HCT273?

The maximum propagation delay is 29 ns at 5.5V supply and 50 pF load. Typical delay is lower, but the 29 ns max is the value to use for timing closure in worst-case analysis.