Nexperia USA Inc. 74HC257D-Q100J

Overview

74HC257D-Q100 from Nexperia is an AEC-Q100 Grade 1 qualified quad 2-input multiplexer with 3-state outputs, operating across 2.0 V to 6.0 V supply voltage and -40 °C to +125 °C ambient range. It features CMOS-level inputs, non-inverting data path, and clamp diodes enabling overvoltage-tolerant interfacing in automotive body control modules.

For engineers reviewing the 74HC257D-Q100 datasheet, 74HC257D-Q100 pinout, 74HC257D-Q100 application, or 74HC257D-Q100 equivalent, this device supports high-noise-immunity signal routing in distributed automotive ECUs where bus-compatible 3-state output control, precise propagation delay (10–33 ns at VCC = 6.0 V), and latch-up immunity (>100 mA) are critical selection criteria.

Technical Context

This IC implements four independent 2:1 multiplexers sharing a common select line (S) and a single active-low 3-state output enable (OE). Each channel routes either I0 or I1 to its corresponding Y output based on S state, with all outputs placed in high-impedance when OE is HIGH.

Its CMOS input structure ensures compatibility with both HC- and HCT-series logic families, while built-in clamp diodes allow safe interface to signals exceeding VCC - a key requirement for mixed-voltage domains in modern vehicle networks like LIN gateway nodes and sensor fusion units.

Key Specifications

Pinout & Package

74HC257D-Q100 uses the SO16 plastic small outline package (SOT109-1), 16-pin, 3.9 mm body width, with standard 1.27 mm lead pitch and gull-wing leads suitable for reflow soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC257D-Q100, the 74HCT257D-Q100 offers superior compatibility with legacy 5 V logic but sacrifices supply voltage flexibility below 4.5 V, while the SN74LV257APWR reduces bill-of-materials cost at the expense of automotive qualification and high-temperature reliability.

Availability

74HC257D-Q100 is available at Aetrix Electronics and suitable for automotive body control modules, engine management systems, and lighting control units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC257D-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, reliable logic, analog, and MOSFET solutions optimized for automotive, industrial, and consumer markets.

The 74HC257-Q100 belongs to Nexperia's automotive-qualified HC logic family, designed specifically for robust signal routing in harsh-temperature environments where noise immunity, latch-up resistance, and AEC-Q100 compliance are mandatory.

FAQ

What is the maximum allowable input voltage relative to VCC?

The absolute maximum input voltage is -0.5 V to VCC + 0.5 V, but integrated clamp diodes allow safe operation with external current-limiting resistors when interfacing to signals up to 7 V - verified per limiting values Table 4 and functional description Section 1.

Can 74HC257D-Q100 drive a 50 pF load at 10 MHz without signal degradation?

Yes: with CPD = 45 pF per multiplexer and typical tpd = 13 ns at VCC = 4.5 V, it maintains clean edges into 50 pF loads; measured transition time (tt) is 5 ns (typ.) at that condition, confirming adequate drive capability per Dynamic Characteristics Table 7.

Is the 3-state output disable time symmetric for HIGH-to-Z and LOW-to-Z transitions?

No: tPHZ (HIGH-to-Z) and tPLZ (LOW-to-Z) are both specified as 12–38 ns (VCC = 4.5 V), confirming symmetrical disable behavior - confirmed in Table 7 footnote [3] and Function Table 3 where Z occurs identically for both output states when OE goes HIGH.

Does the device support hot insertion or live bus connection?

No: while clamp diodes and 3-state outputs improve robustness, the datasheet does not specify hot-swap qualification; IOZ leakage remains ±10 μA at +125 °C, and no bus-fault protection beyond JESD78 latch-up rating is documented - unsuitable for unpowered backplane insertion.