Nexperia USA Inc. 74HC251PW-Q100J

Overview

74HC251PW-Q100 from Nexperia is an automotive-grade 8-input CMOS multiplexer with three select lines (S0–S2), active-low output enable (OE), complementary outputs (Y and Y̅), and 3-state capability. 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 6.0 V (CL = 50 pF). It routes one of eight digital inputs to the output under AEC-Q100 Grade 1 qualification for engine control unit signal routing.

For engineers reviewing the 74HC251PW-Q100 datasheet, 74HC251PW-Q100 pinout, 74HC251PW-Q100 application, or 74HC251PW-Q100 equivalent, key selection considerations include its TTL-compatible variant (74HCT251PW-Q100), 3-state output behavior during OE assertion, input clamping diode support for overvoltage-tolerant interfacing, and TSSOP16 package thermal derating above 91 °C.

Technical Context

This device implements a non-inverting 8:1 data selector using standard CMOS logic architecture. Its select inputs decode binary addresses S2S1S0 to route exactly one of I0–I7 to Y/Y̅, while OE controls high-impedance tri-state output behavior-asserting OE HIGH disables both outputs simultaneously.

The internal structure includes input clamp diodes enabling safe interface to signals exceeding VCC, latch-up immunity >100 mA per JESD78 Class II Level B, and ESD protection rated at HBM >2000 V and CDM >1000 V. It complies with JEDEC standards JESD8C (2.7–3.6 V) and JESD7A (2.0–6.0 V).

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1); 16 leads; body width 4.4 mm; 0.65 mm lead pitch; exposed pad not present; RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HCT251PW-Q100, the 74HC251PW-Q100 provides broader supply flexibility and lower static current at 2.0 V, while SN74LV251APWR trades automotive qualification for improved 3.3 V noise margin and reduced dynamic power at 1 MHz.

Availability

74HC251PW-Q100 is available at Aetrix Electronics and suitable for engine control units, body control modules, instrument clusters, and ADAS camera interfaces requiring stable component supply across automotive production lifecycles.

Supply support for 74HC251PW-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 MOSFET solutions for automotive, industrial, and consumer markets.

The 74HC251-Q100 belongs to Nexperia's automotive-qualified HC logic family, designed specifically for robust signal routing in harsh-environment electronic control units where AEC-Q100 compliance and wide temperature operation are mandatory.

FAQ

What is the maximum clock frequency supported by the 74HC251PW-Q100?

The 74HC251PW-Q100 does not operate on a clock signal-it is a combinational logic device. Its effective maximum data rate depends on propagation delay and load capacitance. At VCC = 6.0 V and CL = 50 pF, tpd = 14 ns (min), supporting input signal transitions up to approximately 35 MHz for reliable setup/hold timing in synchronous systems.

Can the 74HC251PW-Q100 interface directly with 3.3 V microcontrollers?

Yes. With VCC = 3.3 V, VIH = 2.31 V (min) and VIL = 0.99 V (max), fully compatible with standard 3.3 V CMOS I/O. Its 2.0–6.0 V supply range allows native operation without level-shifting circuitry when driven by or driving 3.3 V MCUs such as STM32G4 or NXP S32K1.

How does the output enable (OE) pin behave electrically?

OE is active LOW: driving OE LOW enables Y/Y̅ outputs with standard CMOS drive strength; driving OE HIGH forces both outputs into high-impedance (Z) state. Input leakage on OE is ±1.0 μA max at +125 °C, allowing direct MCU GPIO control without external pull-up resistors in most cases.

Is thermal derating required for continuous operation at 125 °C ambient?

Yes. For the TSSOP16 (SOT403-1) package, total power dissipation derates linearly at 8.5 mW/K above 91 °C. At +125 °C ambient, Ptot must be limited to ≤500 mW − (8.5 mW/K × 34 K) = 211 mW to ensure junction temperature remains within safe limits per datasheet specifications.