NXP Semiconductors 74LVC02AD,112

Overview

74LVC02AD from Nexperia is a quad 2-input NOR gate logic IC designed for level translation between 3.3 V and 5 V systems, featuring Schmitt-trigger inputs for noise immunity, 1.2 V to 3.6 V supply operation, and -40 °C to +125 °C temperature range. It delivers 2.2 ns typical propagation delay at 3.3 V and supports 24 mA output drive capability.

For engineers reviewing the 74LVC02AD datasheet, 74LVC02AD pinout, 74LVC02AD application, or 74LVC02AD equivalent, this device is selected for mixed-voltage digital interfacing, bus arbitration, and noise-prone control signal conditioning where input hysteresis and rail-to-rail compatibility are critical.

Technical Context

The 74LVC02AD implements four independent CMOS NOR gates with Schmitt-trigger inputs-each providing hysteresis (typically 0.3 V at VCC = 3.3 V) to tolerate slow-rising signals and reject high-frequency noise. Input voltage tolerance extends to 5.5 V, enabling direct connection to 5 V TTL outputs without external level-shifting circuitry.

Its logic function follows standard NOR truth table behavior (L/L → H, L/H → L, H/L → L, H/H → L), with static output levels guaranteed across full supply (1.2–3.6 V) and temperature (-40 °C to +125 °C) ranges. Propagation delay is supply- and load-dependent, ranging from 4.0 ns (VCC = 1.65–1.95 V) to 2.2 ns (VCC = 3.0–3.6 V) under 30–50 pF load conditions.

Key Specifications

Pinout & Package

74LVC02AD is supplied in SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads, JEDEC MS-012 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad NOR gate applications.

Compared with SN74LVC02APW, the 74LVC02AD offers identical logic behavior and voltage specs but trades off thermal efficiency and size for SO14 manufacturability and legacy board compatibility; versus 74AUP1G02GW, it delivers 2.7× faster propagation and integrated quad functionality at higher static current.

Availability

74LVC02AD is available at Aetrix Electronics and suitable for industrial control logic, microcontroller bus interface, power sequencing monitoring, and reset signal arbitration requiring stable component supply across extended temperature ranges.

Supply support for 74LVC02AD includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert headquartered in Nijmegen, Netherlands, specializing in high-volume logic, discrete, and MOSFET solutions with emphasis on reliability, efficiency, and manufacturability.

The 74LVC02AD belongs to the LVC (Low-Voltage CMOS) logic family, engineered for robust mixed-voltage digital interfacing in industrial, computing, and communications equipment where signal integrity and supply flexibility are essential.

FAQ

Can 74LVC02AD operate with a 1.2 V supply while accepting 5 V inputs?

Yes. The device is explicitly rated for 1.2 V to 3.6 V VCC operation and features overvoltage-tolerant inputs that accept up to 5.5 V regardless of supply voltage. This allows direct connection of 5 V signals (e.g., legacy TTL outputs) to the inputs while powering the IC from a 1.2 V rail - no external clamping or level-shifting components are needed.

What is the maximum output current per pin, and how does it vary with supply voltage?

The absolute maximum output current is ±50 mA per pin, but the recommended operating condition specifies ±24 mA at VCC = 3.0 V for VOH/VOL compliance. At lower VCC (e.g., 1.65 V), the guaranteed drive drops to ±4 mA for VOH ≥ VCC − 0.3 V and VOL ≤ 0.45 V. Derating is linear with VCC; always verify output voltage margins using Table 6 in the datasheet for your specific VCC and load.

Does the Schmitt-trigger input affect propagation delay measurements?

Yes - Schmitt-trigger inputs introduce input hysteresis (≈0.3 V at 3.3 V), which increases effective input transition time but improves noise margin. Propagation delay (tpd) is measured between 50 % input and 50 % output voltage points using defined test waveforms (Fig. 4). The hysteresis does not alter the specified tpd values; those are characterized with proper input edge rates (≤2.5 ns rise/fall) and include internal gate delay only.

Is the 74LVC02AD pin-compatible with older 74HC02 or 74LS02 devices?

No. While functional equivalence exists, pinouts differ: 74HC02 and 74LS02 use standard 14-pin DIP/SO layouts where VCC is pin 14 and GND is pin 7 - same as 74LVC02AD - but input/output assignments per gate do not match. For example, 74LVC02AD places 1Y on pin 1, whereas 74HC02 places 1Y on pin 3. Direct replacement requires PCB redesign or adapter.