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SN74AHC1G02DBVR

Single 2-input NOR gate, 2-5.5V, 6.5ns, Schmitt inputs, SOT-23-5

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Manufacturer Part：

SN74AHC1G02DBVR

Package：

SOT-23-5 (2.9 x 1.6 x 1.1 mm, DBV package)

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Description

Product Overview

The SN74AHC1G02DBVR from Texas Instruments is a single 2-input positive-NOR gate with 2-5.5V supply, 6.5ns propagation delay, Schmitt-trigger inputs, and +/-8mA output drive in a 5-pin SOT-23 package.

Key Specifications

Logic Function 2-Input Positive-NOR Gate
Supply Voltage 2V to 5.5V
Propagation Delay 6.5 ns (max @ 5V)
Quiescent Current 10 uA (max)
Output Drive +/-8 mA @ 5V
Input Type Schmitt Trigger (all inputs)
ESD Protection HBM +/-2000V, CDM +/-1000V
Package SOT-23-5 (DBV)
Operating Temperature -40 to +125 C

Features

  • 2V to 5.5V wide supply range
  • 6.5ns max propagation delay at 5V
  • 10uA max quiescent current
  • Schmitt-trigger inputs for slow edge tolerance
  • +/-8mA output drive at 5V

Applications

  • Logic glue functions
  • Signal polarity inversion with NOR
  • Debounce and signal conditioning
  • Industrial control logic

The SN74AHC1G02DBVR from Texas Instruments is a single 2-input positive-NOR gate from the 74AHC (Advanced High-Speed CMOS) logic family. The device performs the Boolean function Y = A x B (or Y = NOT(A OR B)) in positive logic. The AHC family provides the speed of bipolar logic with the low power consumption of CMOS, operating from a wide 2V to 5.5V supply range. The 6.5ns maximum propagation delay at 5V enables use in high-speed logic applications. A key feature is the Schmitt-trigger action on all inputs, which provides hysteresis that improves noise immunity and allows the device to accept slowly changing input signals without oscillation or excessive supply current. This makes the SN74AHC1G02DBVR particularly useful for interfacing with mechanical switches (debouncing), slow-rise-time signals from RC networks, or noisy signal environments. The +/-8mA output drive at 5V is sufficient for driving multiple CMOS or TTL loads. The 10uA maximum quiescent current minimizes power consumption in battery-powered applications. The tiny SOT-23-5 package (2.9 x 1.6mm) occupies minimal board space, making it ideal for adding single-gate logic functions without dedicating a multi-gate IC. The device supports the extended -40 to +125C temperature range, suitable for automotive and industrial applications.

The SN74AHC1G02DBVR implements a single 2-input NOR gate using CMOS technology. Key subsystems include: (1) NOR Logic – the core logic uses complementary P-channel and N-channel MOSFET networks; the pull-up network (PMOS) connects VCC to Y when both inputs are LOW; the pull-down network (NMOS) connects Y to GND when either input is HIGH; this implements the NOR function Y = NOT(A OR B); (2) Schmitt-Trigger Inputs – each input has a Schmitt-trigger buffer with different switching thresholds for rising and falling edges; the positive-going threshold (VT+) is higher than the negative-going threshold (VT-); the difference (VT+ – VT-) is the hysteresis voltage (typically 0.4V at 5V supply); this hysteresis prevents output oscillation when the input is near the switching threshold; (3) Output Stage – a CMOS push-pull output stage provides rail-to-rail output swing with low output impedance; the +/-8mA drive capability at 5V is determined by the on-resistance of the output MOSFETs; (4) AHC Technology – the Advanced High-Speed CMOS process provides faster switching than standard HC (High-Speed CMOS) while maintaining low static power consumption; the input and output voltage levels are compatible with both CMOS and TTL logic families when operated at 5V.

Pin Name Function
1 A Input A
2 B Input B
3 GND Ground
4 Y Output (Y = NOT(A OR B))
5 VCC Supply voltage (2V to 5.5V)
  • Active-low reset: NOR gate with one input tied LOW acts as inverter; NOR with one input HIGH acts as always-LOW output
  • Signal debounce: Schmitt-trigger input accepts slow switch transitions without oscillation for clean logic output
  • Logic glue: add a single NOR function between MCU and peripheral without using a multi-gate IC
  • Window comparator: two NOR inputs from comparators detect when signal is outside acceptable range
Manufacturer Part Number Package Notes
TI SN74AHC1G02DCKR SC-70-5 Smaller SC-70 package
Nexperia 74AHC1G02GW SOT-353 Pin-compatible equivalent
TI SN74LVC1G02DBVR SOT-23-5 LVC version, 1.65-5.5V
TI SN74AHC1G00DBVR SOT-23-5 NAND gate (different logic function)
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