Nexperia USA Inc. 74HC251D-Q100J

Overview

74HC251D-Q100 from Nexperia is an automotive-grade 8-input CMOS multiplexer with complementary outputs (Y and Y), three binary select lines (S0–S2), and active-low 3-state output enable (OE). It operates from 2.0 V to 6.0 V, supports -40 °C to +125 °C ambient range, and delivers propagation delay as low as 14 ns at VCC = 6.0 V - used in vehicle body control modules for signal routing between sensor banks and microcontroller inputs.

For engineers reviewing the 74HC251D-Q100 datasheet, 74HC251D-Q100 pinout, 74HC251D-Q100 application, or 74HC251D-Q100 equivalent, this page provides verified pin functions, AEC-Q100 Grade 1 qualification evidence, SO16 package thermal derating data, and direct comparison against 74HCT251D-Q100 and SN74LV4051A for automotive signal selection use cases.

Technical Context

This device implements a non-inverting 8:1 data selector with dual complementary outputs and high-impedance tri-state control. Its input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors - critical for mixed-voltage domains in modern ECUs.

The logic function is fully static CMOS, with TTL-compatible input thresholds only on the 74HCT variant; the 74HC251D-Q100 uses CMOS-level inputs (VIH ≥ 0.7×VCC). Output drive strength is ±4 mA at VCC = 4.5 V, and disable timing (tdis) is guaranteed ≤36 ns over full temperature range.

Key Specifications

Pinout & Package

74HC251D-Q100 uses the SOT109-1 (SO16) plastic small outline package: 16-pin, 3.9 mm body width, 1.27 mm pitch, JEDEC MS-012 compliant. Thermal resistance θJA = 80.6 K/W (typical); total power dissipation derates linearly at 12.4 mW/K above 110 °C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-input multiplexer applications.

Compared with 74HCT251D-Q100, the 74HC251D-Q100 offers superior noise margins and lower static power but requires CMOS-level input drivers; versus SN74LV4051A, it provides deterministic digital logic behavior and complementary outputs essential for synchronous bus architectures.

Availability

74HC251D-Q100 is available at Aetrix Electronics and suitable for automotive body control modules, instrument clusters, ADAS camera interfaces, and powertrain diagnostic ports requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC251D-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 delivering high-performance logic, analog, and MOSFET solutions optimized for automotive, industrial, and mobile applications - with manufacturing rooted in process reliability and AEC-Q100 compliance.

The 74HC251D-Q100 belongs to Nexperia's automotive-qualified HC logic family, designed specifically for robust signal routing in harsh-temperature ECU environments where latch-up immunity, ESD resilience, and wide VCC tolerance are mandatory.

FAQ

Is 74HC251D-Q100 pin-compatible with 74HC251N (DIP-16) or 74HC251PW-Q100 (TSSOP-16)?

Yes - all variants share identical pin numbering and logic function. The 74HC251D-Q100 (SO16/SOT109-1) matches the DIP-16 footprint electrically but differs mechanically; the TSSOP-16 (74HC251PW-Q100) uses SOT403-1 with same pinout but tighter pitch (0.65 mm vs. 1.27 mm) and lower θJA (62 K/W).

What is the maximum clock rate supported for reliable channel switching?

Based on worst-case propagation delay (51 ns at VCC = 4.5 V, −40 °C to +125 °C), the maximum deterministic switching frequency is 9.8 MHz. For glitch-free operation with setup/hold margins, design for ≤5 MHz in safety-critical automotive paths.

Can OE be left unconnected in a static application?

No - OE must be actively driven LOW for normal operation or HIGH for high-Z state. Leaving OE floating risks undefined output states due to noise coupling; tie to GND via 10 kΩ resistor if permanently enabled, or to VCC via same if permanently disabled.

Does 74HC251D-Q100 support hot-swap insertion in live backplanes?

It supports limited hot-swap behavior due to input clamp diodes and controlled output transition times, but lacks explicit hot-swap circuitry (e.g., slew-rate limiting, precharge). Use only with current-limited supplies and series resistors per I/O line per ISO 16750-2 section 4.6.