Skip to main content
Log in
Texas Instruments SN74HCS02BQAR — Logic ICs

SN74HCS02BQAR Quad 2-Input NOR Gate, Schmitt Trigger, 2V-6V

MPNSN74HCS02BQAR
End of Life

Texas Instruments 74HCS series, Logic Type NOR Gate, 4 Circuits, 2 Inputs, Schmitt Trigger Input, 2V ~ 6V Supply, -40°C ~ 125°C, Surface Mount, 14-QFN Exposed Pad.

$0.58Ref. price · indicative, final on quote
Texas Instruments SN74HCS02BQAR datasheet (PDF)
Packaging14-QFN Exposed Pad
RoHSROHS3 Compliant
Series74HCS
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SN74HCS02BQAR specifications
ParameterValue
Series74HCS
Logic typeNOR Gate
MountingSurface Mount
Supply voltage2V ~ 6V
Current - quiescent2 µA
Current - output high, low7.8mA, 7.8mA
I/O channels2
Operating temperature-40°C ~ 125°C
PackageTape & Reel (TR); Cut Tape (CT)
FeaturesSchmitt Trigger Input
Case14-QFN Exposed Pad
Number of circuits4
Input logic level - low1V ~ 3V
Input logic level - high1.5V ~ 4.2V
Max propagation delay @ v, max CL12ns @ 6V, 50pF

Product details

Supply range and noise immunity

The SN74HCS02BQAR: The 2V to 6V supply range lets this gate bridge 3.3V and 5V logic domains without an external level shifter, simplifying the BOM. The Schmitt-trigger inputs accept slow edges (e.g., from RC debounce circuits or long PCB traces) without oscillation, with a typical hysteresis of several hundred millivolts. Quiescent current maxes at 2 µA, so it adds negligible standby draw in battery-backed systems.

The SN74HCS02BQAR is an active, ROHS3-compliant part from TI's 74HCS series.

Frequently asked questions

Is SN74HCS02BQAR a Schmitt trigger device?

Yes, each of the four NOR gates has a Schmitt-trigger input, providing hysteresis for noise rejection on slow or noisy signals.

Where can I buy SN74HCS02BQAR?

This part is sourced through independent distribution. Submit an RFQ for current pricing and availability — confirmed at quote time.

What is the equivalent of SN74HCS02BQAR?

The SN74HCS04PWR is a hex inverter from the same 74HCS family with Schmitt-trigger inputs; it differs in logic function (inverter vs NOR) and circuit count (6 vs 4). For a direct functional replacement, stay within the 74HCS NOR gate family.