Nexperia USA Inc. 74AHC02BQ-Q100X

Overview

74AHC02BQ-Q100 from Nexperia is an automotive-qualified quad 2-input NOR gate in DHVQFN14 package, operating from -40 °C to +125 °C with CMOS-level inputs, 5.5 V absolute max supply voltage, and propagation delay as low as 2.9 ns (VCC = 4.5–5.5 V, CL = 15 pF). It delivers balanced timing, Schmitt-trigger inputs, and input overvoltage tolerance-enabling robust logic interfacing in engine control units and ADAS domain controllers.

For engineers reviewing the 74AHC02BQ-Q100 datasheet, 74AHC02BQ-Q100 pinout, 74AHC02BQ-Q100 application, or 74AHC02BQ-Q100 equivalent, key selection criteria include AEC-Q100 Grade 1 qualification, DHVQFN thermal performance, TTL/CMOS input compatibility across variants, and verified 14-terminal pin mapping for PCB layout and signal integrity validation.

Technical Context

This device implements four independent 2-input NOR gates using high-speed Si-gate CMOS technology, pin-compatible with LSTTL. Its Schmitt-trigger inputs provide noise immunity, while input voltage tolerance beyond VCC supports mixed-voltage interface bridging without level shifters.

The logic function follows standard Boolean NOR behavior: output HIGH only when both inputs are LOW; otherwise output LOW. Propagation delays are tightly balanced between rising and falling edges (tPLH ≈ tPHL), critical for synchronous combinatorial logic in safety-critical automotive subsystems.

Key Specifications

Pinout & Package

DHVQFN14 (SOT762-1) package: 2.5 mm × 3.0 mm × 0.85 mm body, side-wettable flanks for AOI-compatible solder joint inspection, thermally enhanced construction with exposed die pad (non-electrical, optional GND connection).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT02BQ-Q100, the 74AHC02BQ-Q100 offers superior noise immunity via Schmitt-trigger inputs and wider input voltage tolerance, while SN74LVC02AQDRQ1 trades package flexibility and speed for broader low-voltage support-making the BQ variant optimal for new high-density automotive designs requiring AOI and fast timing.

Availability

74AHC02BQ-Q100 is available at Aetrix Electronics and suitable for engine control units, ADAS domain controllers, body control modules, and electric power steering systems requiring stable component supply across extended temperature ranges and automotive lifecycle commitments.

Supply support for 74AHC02BQ-Q100 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 specializing in high-performance, high-reliability logic, analog, and discrete components, with leadership in automotive-qualified silicon.

The 74AHC-Q100 series delivers AEC-Q100-compliant logic functions optimized for automotive powertrain, chassis, and safety systems where timing precision, thermal resilience, and long-term reliability are non-negotiable.

FAQ

What is the maximum clock frequency supported by 74AHC02BQ-Q100 in toggle mode?

The device is a combinational logic gate-not a clocked device-so it has no defined clock frequency. Its usable toggle rate depends on propagation delay and load capacitance: with 15 pF load and 5 V supply, minimum pulse width is ~5.8 ns, supporting up to ~172 MHz continuous toggling. System-level timing must account for board trace delays and fan-out.

Can 74AHC02BQ-Q100 drive a 50 pF capacitive load at 125 °C ambient?

Yes. At VCC = 5.5 V and Tamb = +125 °C, propagation delay increases to 7.0 ns (max) with 50 pF load, remaining within specification. Output drive strength (±25 mA) is maintained across temperature, and total power dissipation stays below 500 mW with proper PCB copper area under the exposed pad.

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

No. The exposed pad (terminal 1 index area) is not electrically connected to any internal node. Per datasheet note, it may be left floating or connected to GND-but if soldered, it must not be tied to any other net. No electrical requirement exists for its connection; thermal benefit is achieved even when unconnected.

How does the Schmitt-trigger input improve system robustness in automotive environments?

Schmitt-trigger inputs provide 0.3–0.5 V hysteresis, rejecting transient noise spikes <10 ns wide commonly induced by ignition systems or DC-DC converters. This eliminates need for external RC filters or software debouncing in critical signal paths like crankshaft position decoding, directly enhancing functional safety compliance.