NOR gates

Simplify your signal chain with combinational logic

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Resolve common combinational logic issues such as enabling or disabling digital signals, monitoring multiple error signals or creating a latch with our portfolio of more than 100 NOR gates. Included are open-drain and Schmitt-trigger device options available in one- to six-channel configurations.

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Featured NOR gates

SN74LVC7002A
NOR gates

4-ch, 4-input, 1.65V to 3.6V, 24mA drive strength NOR gate with Schmitt-Trigger inputs

Approx. price (USD) 1ku | 0.069

SN74LVC7002A-Q1
NOR gates

Automotive 4-ch, 4-input, 1.65-V to 3.6-V 24 mA drive strength NOR gate with Schmitt-Trigger inputs

Approx. price (USD) 1ku | 0.081

Why choose our NOR gates?

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Wide operating voltage range

Select products ranging from 0.8V to 18V to fulfill all your application needs.

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Diverse package offering

Both leaded and nonleaded packages are available with pin counts ranging from 5 pins to 20 pins. Wettable flanks are available on select packages. 

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Schmitt-trigger inputs

Our high-speed CMOS with Schmitt-trigger (HCS) family features Schmitt-trigger inputs that allow for superior noise immunity. 

Common NOR gate applications

Design an alarm or tamper circuit with an S-R latch

Critical systems that need to flag and address events use alarm circuits. This video presents a simple set-reset (S-R) latching solution designed to avoid missing alarm trigger events.

Featured products for NOR gates
SN74AUP1G02 ACTIVE Single 2-input, 0.8-V to 3.6-V low power NOR gate
SN74AUC2G02 ACTIVE 2-ch, 2-input, 0.8-V to 2.7-V high speed NOR gates
SN74LVC2G02 ACTIVE 2-ch, 2-input, 1.65-V to 5.5-V NOR gates

Reduce noise impact

Our high-speed CMOS with Schmitt-trigger (HCS) family performs over a 2V-to-6V input voltage range. Schmitt-trigger inputs decipher clean signals in 3.3V and 5V applications with high noise, and increase slow signal performance by sharpening logic-level transitions.

Application note
Reduce Noise and Save Power with the New HCS Logic Family (Rev. A)
Designers continuously strive to improve signal integrity, reduce power and increase reliability in their systems. TI designed its next-generation Schmitt-trigger integrated high-speed CMOS family to achieve these goals.
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Application brief
Understanding Schmitt Triggers (Rev. A)
Most CMOS, BiCMOS and TTL devices require fast edges on the high and low transitions of their inputs. If edges are too slow, it can cause excessive current or oscillation or damage the device.
PDF | HTML
Featured products for Schmitt-trigger inputs
SN74HCS27 ACTIVE Triple 3-input NOR gates with Schmitt-trigger inputs
SN74HCS02 ACTIVE 4-ch, 2-input, 2V to 6V low power NOR gates with Schmitt-Trigger inputs
SN74HCS27-Q1 ACTIVE Automotive 3-ch, 3-input, 2-V to 6-V low power NOR gates with Schmitt-Trigger inputs

Optimize board size with cost-efficient solutions

The small-outline transistor thin (SOT-23-THN) DYY package is a discrete logic leaded package measuring 4.2mm by 3.26mm, which is 57% smaller than the thin shrink small-outline package (TSSOP) equivalent. The DYY package's standard 0.5mm pitch enables easy integration into existing manufacturing equipment. 

The BQA 14-pin logic very very quad flat no-lead (WQFN) package measures 3mm by 2.5mm, which is 76% smaller than the TSSOP equivalent and 40% smaller than the previous-generation QFN package. This package also comes in wettable-flank configurations to enable optical inspection rather than traditional X-ray inspection during manufacturing.

Left to right: SOT-23-THN, TSSOP, SOIC, SSOP

Featured products for cutting-edge packages
SN74AHCT02-Q1 ACTIVE Automotive four-channel, dual-input, 4.5-V to 5.5-V NOR gates with TTL-compatible CMOS inputs
SN74HCS02 ACTIVE 4-ch, 2-input, 2V to 6V low power NOR gates with Schmitt-Trigger inputs
SN74AHC02 ACTIVE 4-ch, 2-input, 2-V to 5.5-V NOR gates