Nexperia USA Inc. 74VHC02BQ,115

Overview

74VHC02BQ,115 from Nexperia is a quad 2-input NOR gate in DHVQFN14 package, operating at 2.0–5.5 V supply with CMOS input levels, 7 ns max propagation delay (VCC = 4.5–5.5 V, CL = 15 pF), and rated for -40 °C to +125 °C. It provides discrete logic-level signal inversion and combinatorial gating in digital control paths of industrial microcontroller interfaces and power sequencers.

For engineers reviewing the 74VHC02BQ,115 datasheet, 74VHC02BQ,115 pinout, 74VHC02BQ,115 application, or 74VHC02BQ,115 equivalent, this page delivers verified pin functions, thermal-enhanced QFN package details, TTL-compatible timing behavior, and validated alternatives for logic-level translation and noise-immune gate design.

Technical Context

This device implements four independent 2-input NOR gates using high-speed Si-gate CMOS technology, fully compliant with JEDEC Std. 7-A and pin-compatible with LSTTL. Each gate features Schmitt-trigger inputs enabling robust noise rejection on slow-rising signals.

It accepts input voltages up to 7.0 V regardless of VCC, supports rail-to-rail output swing, and maintains balanced tPLH/tPHL propagation delays across temperature and voltage ranges - critical for synchronous logic state transitions in timing-critical subsystems.

Key Specifications

Pinout & Package

DHVQFN14 (SOT762-1) package: 2.5 × 3.0 × 0.85 mm body, no leads, thermally enhanced exposed pad (non-electrical unless connected to GND), 14 terminals, lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2-input NOR gate applications.

Compared with 74VHC02BQ,115, the 74VHCT02BQ,115 offers guaranteed TTL-level input recognition but sacrifices 2.0 V minimum supply support; SN74LVC02APWR delivers faster speed at 3.3 V but removes 5 V interoperability entirely - making the original part uniquely suited for dual-voltage industrial control backplanes.

Availability

74VHC02BQ,115 is available at Aetrix Electronics and suitable for industrial motor control logic, microcontroller reset sequencing, programmable logic interface, and power supply sequencing monitor applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74VHC02BQ,115 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 delivering high-performance logic, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial and automotive applications.

The 74VHC series targets high-speed, low-power CMOS logic replacement for legacy TTL systems, emphasizing pin compatibility, wide supply range, and robust ESD performance in harsh environments.

FAQ

Is the exposed thermal pad on the DHVQFN14 package electrically connected?

No - the exposed pad (terminal 1 index area) has no electrical function per Nexperia's datasheet. It may remain floating or be soldered to GND for thermal improvement, but no electrical connection is required or specified. Soldering it to GND improves thermal resistance by ~15 °C/W but does not affect logic operation.

Can 74VHC02BQ,115 drive a 50 pF load at 5 V while maintaining timing specs?

Yes - at VCC = 4.5–5.5 V and CL = 50 pF, the maximum propagation delay remains 9.5 ns across -40 °C to +125 °C, matching the datasheet's dynamic characteristics table. Output drive capability of ±8.0 mA ensures stable edges into that load without overshoot or excessive rise/fall time degradation.

What is the significance of "Schmitt-trigger action" on all inputs?

Schmitt-trigger inputs provide hysteresis (typically 0.3–0.5 V), meaning VIH and VIL thresholds differ. This prevents oscillation on slow or noisy signals - such as mechanical switch bounce or long PCB traces - by ensuring clean, single-transition output responses even with millisecond-scale input ramp times.

Does 74VHC02BQ,115 support partial power-down or I^OFF protection?

No - the device lacks I^OFF circuitry. When VCC = 0 V, input/output pins exhibit leakage up to ±20 μA but do not isolate. For hot-swap or partial-power systems, external isolation (e.g., series resistors or dedicated bus switches) is required to prevent backfeeding or contention.