Nexperia USA Inc. 74HC257PW,118

Overview

74HC257PW,118 from Nexperia is a quad 2-input CMOS multiplexer with 3-state outputs in TSSOP16 package, operating from 2.0 V to 6.0 V supply, featuring non-inverting data path, ±35 mA output drive, and -40 °C to +125 °C temperature range - used for bus-oriented data routing in digital logic systems.

For engineers reviewing the 74HC257PW,118 datasheet, 74HC257PW,118 pinout, 74HC257PW,118 application, or 74HC257PW,118 equivalent, key selection criteria include 3-state bus interface capability, TTL-compatible input thresholds (for HCT variant), propagation delay under 33 ns at 4.5 V, and latch-up immunity exceeding 100 mA per JESD78 Class II Level B.

Technical Context

This device 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 Y output based on S state, with outputs placed in high-impedance when OE is HIGH.

The internal architecture uses standard CMOS transmission gates and buffer stages, supporting direct connection to system buses without external pull-ups. Input clamp diodes allow safe interfacing to voltages exceeding VCC when current-limiting resistors are used.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1), 16-pin, body width 4.4 mm, lead pitch 0.65 mm, designed for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC257PW,118, the 74HCT257PW,118 offers improved input compatibility with legacy 5 V TTL systems, while the SN74LV257APW delivers faster switching at 3.3 V but sacrifices 6 V tolerance and extended temperature support - making the HC variant optimal for wide-supply industrial control where robustness and voltage flexibility are primary.

Availability

74HC257PW,118 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, embedded microcontroller peripheral sharing, and legacy system bus interface requiring stable component supply across extended temperature ranges.

Supply support for 74HC257PW,118 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 focused on essential efficiency technologies, delivering high-performance logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74HC series targets general-purpose digital logic applications demanding wide supply range, low static power, and robust latch-up immunity - specifically engineered for reliability in harsh industrial environments and long-lifecycle equipment.

FAQ

What is the maximum clock frequency supported by the 74HC257PW,118?

The device does not operate on a clock; it is combinatorial logic. Maximum usable data rate depends on propagation delay and system timing margins. With tpd = 13 ns typical at 4.5 V, it supports reliable data switching up to ~30 MHz in well-designed PCB layouts with proper termination and load capacitance ≤15 pF.

Can the 74HC257PW,118 be used with 3.3 V microcontrollers?

Yes - the 74HC257PW,118 operates from 2.0 V to 6.0 V and has CMOS input thresholds scaling with VCC. At 3.3 V supply, VIH ≈ 2.3 V and VIL ≈ 1.0 V, providing adequate noise margin for 3.3 V LVTTL or LVCMOS outputs driving its inputs directly.

Is there a pin-compatible automotive-grade version?

No - the 74HC257PW,118 is not AEC-Q100 qualified. Nexperia offers automotive-qualified variants under the 74HC257-Q100 designation in SO16 (74HC257D-Q100), but no TSSOP16 automotive version exists. For automotive use, SO16 packaging and full qualification documentation must be verified.

How does the 3-state output behavior interact with bus contention?

When OE is HIGH, all Y outputs enter high-impedance state, electrically disconnecting them from the bus. This prevents contention when multiple devices share the same bus lines. Proper sequencing - asserting OE before changing S or inputs - avoids momentary short-circuits during state transitions.