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Texas Instruments SN74LS02NS — Logic ICs

SN74LS02NS NOR Gate IC, 74LS Series, 4-Ch 2-In, 15 ns

MPNSN74LS02NS
End of Life

Texas Instruments 74LS series, SN74LS02NS, Quad 2-Input NOR Gate, 4.75V to 5.25V supply, 15 ns propagation delay at 5V/15pF, 400µA/16mA output drive, 0°C to 70°C, 14-SOIC package.

$1.36Ref. price · indicative, final on quote
Texas Instruments SN74LS02NS datasheet (PDF)
Packaging14-SOIC (0.209", 5.30mm Width)
RoHSROHS3 Compliant
Series74LS
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SN74LS02NS specifications
ParameterValue
Series74LS
Logic typeNOR Gate
MountingSurface Mount
Supply voltage4.75V ~ 5.25V
Current - output high, low400µA, 16mA
I/O channels2
Operating temperature0°C ~ 70°C (TA)
PackageTube
Case14-SOIC (0.209\", 5.30mm Width)
Number of circuits4
Input logic level - low0.8V
Input logic level - high2V
Max propagation delay @ v, max CL15ns @ 5V, 15pF

Product details

Quad 2-input NOR gate for 5V TTL logic – what you need to know

The SN74LS02NS: Quad 2-input NOR gate from the 74LS series. Four independent gates in one package, each with two inputs. Supply range 4.75 V to 5.25 V, operating temperature 0°C to 70°C. Propagation delay 15 ns at 5 V with 15 pF load. Output drive 400 µA source, 16 mA sink.

The SN74F27NSR (74F series) has 5 ns at 5 V, 50 pF.

Output drive – 400 µA source, 16 mA sink

The 16 mA sink capability is typical for 74LS and enough to drive a standard TTL input or a low-current LED through a series resistor. The 400 µA source is weaker – do not expect to drive a relay coil or a high-impedance load directly. If you need open-collector outputs for wired-OR or higher sink current (24 mA), the SN74ALS38BNSR (quad 2-input NAND, open collector) is a functional alternative, though it is a NAND, not a NOR.

Frequently asked questions

What is the pinout of SN74LS02NS?

Standard 14-pin SOIC pinout for a quad 2-input NOR gate: pins 1-3, 4-6, 8-10, 11-13 are the four gates (inputs A/B, output Y); pin 7 is GND; pin 14 is VCC. Refer to the SN74LS02NS datasheet for the exact diagram.

Is SN74LS02NS RoHS compliant?

Yes, the SN74LS02NS is ROHS3 compliant per the lifecycle record.

What is the SN74LS02NS equivalent or cross reference?

There is no single pin-for-pin drop-in equivalent across all parameters. The SN74ALS38BNSR is a quad 2-input NAND with open-collector outputs (different logic function, higher sink current). The SN74F27NSR is a triple 3-input NOR with faster 5 ns delay but different pinout and fewer gates. For a direct NOR replacement, stick with the SN74LS02NS or a same-series 74LS02 variant in the same package.