Nexperia USA Inc. 74HC257PW-Q100J

Overview

74HC257PW-Q100 from Nexperia is an automotive-qualified quad 2-input multiplexer with 3-state outputs, operating across 2.0 V to 6.0 V supply and rated for -40 °C to +125 °C. It features CMOS-level inputs, non-inverting data path, clamp diodes enabling overvoltage-tolerant interfacing, and direct system bus compatibility via high-impedance outputs. Used in vehicle body control modules for signal routing between sensor banks and microcontroller ADC inputs.

For engineers reviewing the 74HC257PW-Q100 datasheet, 74HC257PW-Q100 pinout, 74HC257PW-Q100 application, or 74HC257PW-Q100 equivalent, key selection considerations include AEC-Q100 Grade 1 qualification, 3-state output timing (t_en = 10 ns typ. at V_CC = 6.0 V), input voltage level compatibility (CMOS), propagation delay (t_pd = 10 ns typ. S→Y at V_CC = 6.0 V), and TSSOP16 thermal derating (8.5 mW/K above 91 °C).

Technical Context

This device implements four independent 2:1 multiplexers sharing a common select (S) and output enable (OE) control line. Each channel routes either I0 or I1 to its dedicated Y output based on S logic state, with all outputs placed in high-impedance when OE is HIGH.

Input clamp diodes allow safe interface to signals exceeding V_CC when used with current-limiting resistors. The 3-state outputs meet JEDEC JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V) standards, supporting mixed-voltage system bus architectures without level shifters.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1), 16-lead, 4.4 mm body width, 0.65 mm pitch; optimized for high-density automotive PCB layouts with enhanced thermal performance (P_tot derates 8.5 mW/K above 91 °C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2-input multiplexer applications.

Compared with 74HC257PW-Q100, the 74HCT257PW-Q100 offers seamless integration with 5 V TTL sources but increases static current, while the SN74LV257APWR extends low-voltage capability at the expense of automotive qualification and thermal robustness.

Availability

74HC257PW-Q100 is available at Aetrix Electronics and suitable for automotive body control units, instrument clusters, and engine management diagnostics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC257PW-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 leading semiconductor manufacturer specializing in high-performance, high-reliability logic, analog, and discrete components, with core expertise in automotive-grade silicon solutions.

The 74HC257-Q100 product line delivers AEC-Q100-qualified logic functions optimized for automotive signal routing, sensor interface consolidation, and ECU bus management under harsh environmental conditions.

FAQ

What is the maximum clock frequency supported for reliable multiplexing?

The 74HC257PW-Q100 does not operate on a clock; it is combinational logic. Its usable signal switching rate is determined by propagation delay and transition time. With t_pd = 10 ns (typ.) and t_t = 4 ns (typ.) at V_CC = 6.0 V, it reliably handles input data rates up to ~30 MHz in synchronous routing applications where setup/hold timing is managed externally.

Can this device interface directly with 3.3 V microcontrollers?

Yes. At V_CC = 3.3 V, VIH is guaranteed ≥2.1 V and VIL ≤1.35 V per datasheet Table 6, fully compatible with standard 3.3 V CMOS logic levels. No level-shifting circuitry is required when both controller and multiplexer share the same 3.3 V supply rail.

How does the clamp diode protection function in practice?

Each input has integrated clamp diodes to V_CC and GND. When an input exceeds V_CC + 0.5 V, the upper diode conducts, diverting excess current through an external series resistor. This allows safe interfacing with 12 V automotive sensors or switch signals without damaging the IC, provided resistor value limits current to ≤20 mA per datasheet limiting values.

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, the allowable P_tot reduces from 500 mW to approximately 471 mW. Designers must calculate worst-case dynamic + static power and ensure junction temperature remains below 150 °C using board-level copper area and airflow assumptions.