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Texas Instruments SN74AHCT14D — Analog & Data Acquisition

SN74AHCT14D 74AHCT Hex Schmitt-Trigger Inverter, 5V Supply

MPNSN74AHCT14D
End of Life

Texas Instruments 74AHCT series, SN74AHCT14D, hex Schmitt-trigger inverter, 6 circuits, 1 input per circuit, 4.5V to 5.5V supply, 8ns propagation delay at 5V/50pF, 14-SOIC package, -40°C to 85°C.

$1.16Ref. price · indicative, final on quote
Texas Instruments SN74AHCT14D datasheet (PDF)
Packaging14-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Series74AHCT
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SN74AHCT14D specifications
ParameterValue
Series74AHCT
Logic typeInverter
MountingSurface Mount
Supply voltage4.5V ~ 5.5V
Current - quiescent2 µA
Current - output high, low8mA, 8mA
I/O channels1
Operating temperature-40°C ~ 85°C
PackageTube
FeaturesSchmitt Trigger
Case14-SOIC (0.154\", 3.90mm Width)
Number of circuits6
Input logic level - low0.5V ~ 0.6V
Input logic level - high1.9V ~ 2.1V
Max propagation delay @ v, max CL8ns @ 5V, 50pF

Product details

Supply voltage and why it matters for your BOM

The 4.5V to 5.5V supply range is the headline difference from newer 2V–5.5V families like the 74HCS or 74LVU. If your board already has a regulated 5V rail — common in industrial control, PLC I/O, and legacy telecom — the SN74AHCT14D drops in without a regulator change. The 74HCS04 and 74LVU04 peers run down to 2V, but they also cost more and may not be stocked as deep in the independent channel. For a 5V-only design, this part is the simpler, cheaper call.

No lab, no bench — field-swap reality

The 14-SOIC package is a standard footprint. No exposed pad, no thermal vias.

No last-time-buy notice, no end-of-life risk on the horizon. It is a mature, stable line that distribution carries routinely.

Propagation delay and timing budget

8 ns max at 5V with a 50 pF load.

Output drive — what 8 mA gets you

Each output can sink or source 8 mA.

Frequently asked questions

Is SN74AHCT14D a direct replacement for 74HC14 or 74LS14?

Functionally yes — all three are hex Schmitt-trigger inverters. The SN74AHCT14D is a 5V-only part (4.5V to 5.5V), while the 74HC14 runs from 2V to 6V and the 74LS14 is a 5V bipolar part. In a 5V socket, the SN74AHCT14D is a drop-in CMOS replacement with lower power consumption (2 µA quiescent) and faster speed than the LS14. Pinout is the same 14-SOIC or DIP layout.

What are the equivalents or cross references for SN74AHCT14D?

The closest functional equivalents in the 74-series are the SN74HCS04PWR (74HCS family, 2V to 6V supply, 16 ns delay) and the SN74LVU04APWT (74LVU family, 2V to 5.5V, 7 ns delay). Neither is a direct pin-for-pin replacement without checking the supply voltage and timing — the SN74AHCT14D is the 5V-only, 8 ns option. For automotive-rated designs, the SN74HCS14QDRQ1 is an AEC-Q100 qualified alternative.