Nexperia USA Inc. 74HCT157PW,118

Overview

74HCT157PW,118 from Nexperia is a quad 2-input TTL-compatible multiplexer IC used for digital signal routing in data selection and bus management circuits. It features a single active-low enable (E) input, common select (S) control, four independent 2:1 data paths (1Y–4Y), operates from 4.5 V to 5.5 V, supports -40 °C to +125 °C industrial temperature range, and uses TSSOP16 package with 0.65 mm pitch - deployed in microcontroller peripheral interfacing and FPGA I/O expansion.

For engineers reviewing the 74HCT157PW,118 datasheet, 74HCT157PW,118 pinout, 74HCT157PW,118 application, or 74HCT157PW,118 equivalent, key selection criteria include TTL-level input compatibility, propagation delay under 41 ns at 5 V, low static current (<160 μA), ESD robustness (HBM >2000 V), and thermal performance in compact TSSOP packaging.

Technical Context

The 74HCT157PW,118 implements four independent 2:1 multiplexers sharing one select (S) and one enable (E) input. Its TTL-compatible inputs accept 0.8 V/2.0 V logic thresholds at VCC = 5 V, enabling direct interface with legacy 5 V TTL systems without level shifting. The non-inverting data path ensures output polarity matches selected input.

Each multiplexer output (1Y–4Y) drives CMOS loads up to ±4 mA while maintaining VOL ≤ 0.4 V and VOH ≥ 3.7 V at VCC = 4.5 V. Propagation delays are specified separately for data-to-output (16–41 ns), select-to-output (22–56 ns), and enable-to-output (15–39 ns) paths, reflecting asymmetric timing behavior critical for synchronous bus arbitration.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1); 16-pin, 4.4 mm body width, 0.65 mm lead pitch, 1.20 mm max height - optimized for high-density PCB layouts and automated surface-mount assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HCT157PW and 74LVC157PW, the 74HCT157PW,118 delivers the tightest propagation delay specification at 5 V, lowest high-temperature supply current, and guaranteed TTL-level input compatibility - making it optimal for industrial 5 V logic consolidation where timing predictability and interoperability are non-negotiable.

Availability

74HCT157PW,118 is available at Aetrix Electronics and suitable for industrial automation, embedded microcontroller systems, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT157PW,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 specializing in high-performance, energy-efficient logic, analog, and MOSFET components - founded in 2017 as a spin-off from NXP, now serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.

The 74HCT157PW,118 belongs to Nexperia's 74HCT logic family, engineered specifically for seamless integration between legacy 5 V TTL systems and modern CMOS-based controllers - emphasizing robustness, wide temperature operation, and pin-for-pin compatibility across voltage-tolerant variants.

FAQ

Can the 74HCT157PW,118 operate reliably at 3.3 V?

No - the 74HCT157PW,118 is specified only for 4.5 V to 5.5 V operation. At 3.3 V, its TTL input thresholds (VIH = 2.0 V, VIL = 0.8 V) become invalid, and output drive capability degrades significantly. For 3.3 V systems, use the 74LVC157PW instead, which supports 1.65–5.5 V with CMOS-compatible inputs.

What is the maximum capacitive load the outputs can drive?

The outputs are characterized up to 50 pF load capacitance per channel, with propagation delay and transition time specifications guaranteed under this condition. Driving >50 pF may increase tPD and tt beyond datasheet limits and risk signal integrity issues; add series termination or buffer stages for heavier loads.

Is the enable (E) input truly active-low, and does it override select (S)?

Yes - E is active-low and has absolute priority: when E = HIGH, all outputs (1Y–4Y) are forced LOW regardless of S state or input values. This hard disable function is essential for bus isolation and prevents contention during system reset or power sequencing.

Does the TSSOP16 package require thermal pad soldering?

No - the SOT403-1 (TSSOP16) package has no exposed thermal pad. Unlike QFN variants, its thermal performance relies solely on copper traces and vias connected to VCC/GND pins; no special PCB land pattern or solder paste stencil is needed beyond standard TSSOP footprint guidelines.