Nexperia USA Inc. 74HCT157PW,112

Overview

74HCT157PW,112 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 active-low enable (E), common select (S), four independent 2:1 data paths (1I0/1I1 to 1Y, etc.), operates from 4.5 V to 5.5 V, supports -40 °C to +125 °C ambient range, and delivers propagation delays as low as 12 ns at VCC = 5 V with CL = 15 pF - enabling use in industrial control logic and microcontroller peripheral interfacing.

For engineers reviewing the 74HCT157PW,112 datasheet, 74HCT157PW,112 pinout, 74HCT157PW,112 application, or 74HCT157PW,112 equivalent, key selection considerations include its TTL-level input compatibility, 16-pin TSSOP package footprint, guaranteed operation across extended temperature, enable-controlled output disable, and non-inverting data path behavior critical for deterministic signal routing in synchronous digital systems.

Technical Context

The 74HCT157PW,112 implements four independent 2:1 multiplexers sharing a single select (S) and active-low enable (E) control line. Its TTL-compatible inputs accept standard 5 V logic thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), while outputs drive CMOS loads with VOH ≥ 3.98 V and VOL ≤ 0.26 V at IO = ±4 mA.

Functionally, it performs bitwise data selection: when E = LOW, outputs Yn follow selected inputs (1Y = S ? 1I1 : 1I0); when E = HIGH, all outputs force LOW. Input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1), 16 leads, body width 4.4 mm, 0.65 mm lead pitch, exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC157PW,112 and SN74LS157DR, the 74HCT157PW,112 uniquely balances TTL input compatibility with CMOS power efficiency and extended temperature operation - making it optimal for new industrial designs needing robust 5 V interoperability without sacrificing thermal headroom or supply flexibility.

Availability

74HCT157PW,112 is available at Aetrix Electronics and suitable for industrial automation controllers, embedded test instrumentation, and automotive body electronics requiring stable component supply across extended temperature and long production lifecycles.

Supply support for 74HCT157PW,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 leading semiconductor manufacturer headquartered in Nijmegen, Netherlands, specializing in high-volume logic, discrete, and MOSFET solutions with emphasis on reliability and energy efficiency.

The 74HCT157 belongs to Nexperia's industry-standard 74HCT logic family, designed specifically to provide TTL-compatible input thresholds with CMOS power characteristics for seamless integration into legacy and mixed-voltage digital systems.

FAQ

What is the maximum clock frequency supported by the 74HCT157PW,112?

The 74HCT157PW,112 does not operate on a clock signal - it is a combinational logic device with propagation delay as the speed metric. At VCC = 5 V and CL = 15 pF, tPD is 12 ns (max 41 ns), supporting reliable data routing in systems with signal transitions up to ~25 MHz. Timing depends on input slew rate and load capacitance, not a fixed clock.

Can the 74HCT157PW,112 be used with a 3.3 V supply?

No - the 74HCT157PW,112 is specified only for 4.5 V to 5.5 V operation. Its TTL-compatible inputs require minimum VIH = 2.0 V, but internal circuitry is not characterized below 4.5 V. For 3.3 V systems, use the 74HC157PW,112 variant, which supports 2.0–6.0 V and has CMOS-level inputs.

Is the exposed pad on the TSSOP16 package electrically connected?

No - the exposed thermal pad on the SOT403-1 (TSSOP16) package is not electrically connected to any internal node. Per Nexperia documentation, it may remain floating or be connected to GND for thermal improvement, but soldering it is optional and carries no electrical requirement.

Does the 74HCT157PW,112 support hot insertion or live swapping?

No - the 74HCT157PW,112 lacks hot-swap protection circuitry such as power-on reset, Ioff, or powered-off isolation. Applying VCC while inputs are driven can cause latch-up or excessive current flow. Power sequencing (VCC before inputs) and system-level hot-swap controllers are required for live insertion scenarios.