Nexperia USA Inc. 74HC257PW,112

Overview

74HC257PW,112 from Nexperia is a quad 2-input CMOS multiplexer with 3-state outputs, designed for data routing and bus interface in digital logic systems. It operates across 2.0 V to 6.0 V supply, delivers propagation delay as low as 10 ns at VCC = 6.0 V, supports -40 °C to +125 °C ambient range, and features TTL-compatible input thresholds in the 74HCT variant. It is used in microcontroller peripheral selection and shared-bus arbitration circuits.

For engineers reviewing the 74HC257PW,112 datasheet, 74HC257PW,112 pinout, 74HC257PW,112 application, or 74HC257PW,112 equivalent, key selection criteria include its 3-state output enable timing (ten ≤ 38 ns), input voltage compatibility (CMOS-level for HC, TTL-level for HCT), bus-interface capability, and TSSOP16 package thermal performance.

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 multiplexer routes either I0 or I1 to its Y output based on S state, while OE controls high-impedance output assertion.

All inputs include clamp diodes enabling safe interfacing to voltages exceeding VCC when current-limiting resistors are used. The logic family ensures high noise immunity (typical VIH/VIL margins >1.2 V at VCC = 4.5 V) and latch-up immunity exceeding 100 mA per JESD78 Class II Level B.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1), 16-lead, body width 4.4 mm, lead pitch 0.65 mm, suitable 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,112, the 74HCT257PW,112 improves input compatibility in 5 V TTL environments, while SN74LV257APW offers superior speed and efficiency in 3.3 V applications-neither is pin- or functionally identical without verifying OE polarity and timing alignment.

Availability

74HC257PW,112 is available at Aetrix Electronics and suitable for industrial control panels, test instrumentation, and embedded communication modules requiring stable component supply across extended temperature ranges.

Supply support for 74HC257PW,112 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 high-volume, high-reliability logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74HC257 belongs to Nexperia's standard logic portfolio, engineered for robustness in harsh environments and optimized for seamless integration into space-constrained, thermally demanding PCB layouts.

FAQ

What is the maximum clock frequency supported by 74HC257PW,112?

The device does not operate on a clock; it is combinational logic. Its usable data rate depends on propagation delay and system timing margins. With tpd ≤ 33 ns at VCC = 4.5 V and ten/tdis ≤ 45 ns, it reliably supports asynchronous bus switching up to ~10 MHz in typical load conditions (CL = 15 pF).

Can 74HC257PW,112 interface directly with 3.3 V microcontrollers?

Yes. At VCC = 3.3 V, VIH is guaranteed ≥ 2.1 V and VIL ≤ 1.2 V per datasheet Table 6, fully compatible with standard 3.3 V CMOS logic thresholds. Outputs swing rail-to-rail, ensuring clean high/low levels for receiving devices.

Is the 74HC257PW,112 RoHS compliant and halogen-free?

Yes. Nexperia confirms the 74HC257PW,112 meets RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21, with no brominated flame retardants or chlorine-based compounds in the TSSOP16 package materials.

How does the 3-state output behavior respond to OE during power-up?

OE is active LOW and internally pulled weakly HIGH at power-on reset. Until VCC stabilizes and OE is actively driven, outputs remain in high-impedance state-preventing bus conflicts during power sequencing. No external pull-up is required for safe startup.