Nexperia USA Inc. 74AHCT157PW,112

Overview

74AHCT157PW,112 from Nexperia is a quad 2-input multiplexer IC operating at 4.5–5.5 V, featuring TTL-compatible inputs, 16-pin TSSOP package, -40 °C to +125 °C temperature range, and active-low enable (E) for bus isolation in digital logic systems. It selects four parallel data bits from two sources (I0/I1) using a shared select line (S), commonly used in address/data routing and function generation in microcontroller peripheral interfaces.

For engineers reviewing the 74AHCT157PW,112 datasheet, 74AHCT157PW,112 pinout, 74AHCT157PW,112 application, or 74AHCT157PW,112 equivalent, key selection criteria include TTL-level input compatibility, propagation delay under 8 ns at 5 V/50 pF, low static current (<80 μA), Schmitt-trigger input tolerance, and pinout validation for TSSOP16 layout integration.

Technical Context

The 74AHCT157PW,112 implements four independent 2:1 multiplexers sharing one common select (S) and one active-low enable (E). Its logic equations follow Y = E̅ × (I1 × S + I0 × S̅), enabling deterministic data routing without internal latching or clocking. All inputs accept TTL voltage thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), ensuring interoperability with legacy 5 V logic families.

It operates strictly as combinational logic with no internal state retention, and its output drive capability (±8 mA at VOH/VOL) supports direct connection to standard CMOS/TTL loads. Propagation delays are asymmetrically specified-S-to-Y and E-to-Y paths differ from data-input-to-Y paths-requiring timing analysis per signal path in synchronous designs.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1); 16 leads; body width 4.4 mm; 0.65 mm 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 SN74AHCT157PWR, the 74AHCT157PW,112 offers tighter static current control and identical industrial temperature support, while the 74LVC157PW,118 trades voltage flexibility for speed and power efficiency-making it unsuitable as a functional substitute in 5 V applications.

Availability

74AHCT157PW,112 is available at Aetrix Electronics and suitable for industrial control systems, test instrumentation, microcontroller peripheral expansion, and memory interface logic requiring stable component supply across extended temperature ranges.

Supply support for 74AHCT157PW,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 global semiconductor expert delivering high-performance logic, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial, consumer, and communications markets.

The 74AHCT series targets robust 5 V digital interfacing with TTL compatibility, designed specifically for noise-immune, high-speed data routing in harsh industrial and automotive-adjacent environments.

FAQ

What is the maximum clock frequency supported by the 74AHCT157PW,112?

The 74AHCT157PW,112 is a purely combinational device with no internal clock; its usable data rate depends on propagation delay and load capacitance. With CL = 50 pF and VCC = 5 V, tPD ≤ 13.5 ns limits reliable toggle rates to ≤37 MHz for single-output switching, though practical bus multiplexing typically operates below 10 MHz to ensure setup/hold margins.

Can the 74AHCT157PW,112 be used with 3.3 V logic inputs?

No-74AHCT157PW,112 requires TTL-compatible inputs (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and is specified only for 4.5–5.5 V supply. A 3.3 V input may not reliably exceed VIH threshold under worst-case conditions; use 74AHC157 or level translators instead for mixed-voltage interfacing.

Is the exposed pad on the TSSOP16 package electrically connected?

No-the thermal pad on SOT403-1 (TSSOP16) is not electrically connected to any internal node. Per Nexperia documentation, it has no electrical or mechanical requirement to be soldered; if attached, it must remain floating or be connected to GND to avoid parasitic coupling or thermal stress.

Does the 74AHCT157PW,112 support hot insertion or live swapping?

It does not include built-in hot-swap protection features such as power-up sequencing or I²t limiting. While its absolute maximum ratings allow brief overvoltage exposure, controlled power-rail ramping and current-limiting circuitry must be implemented externally to prevent damage during live insertion into powered backplanes.