Nexperia USA Inc. 74HC157BQ,115

Overview

74HC157BQ,115 from Nexperia is a quad 2-input CMOS multiplexer with active-low enable (E) and common select (S), operating from 2.0 V to 6.0 V supply, delivering propagation delays as low as 10 ns at VCC = 6.0 V, and rated for -40 °C to +125 °C industrial temperature range. It routes four independent data pairs (1I0/1I1 through 4I0/4I1) to corresponding outputs (1Y–4Y) in digital logic control, bus selection, and signal routing applications.

For engineers reviewing the 74HC157BQ,115 datasheet, 74HC157BQ,115 pinout, 74HC157BQ,115 application, or 74HC157BQ,115 equivalent, key selection criteria include its 16-terminal DHVQFN package, TTL-compatible input thresholds (for 74HCT variant), non-inverting data path, latch-up immunity (>100 mA), and ESD robustness (HBM >2000 V, CDM >1000 V).

Technical Context

The device implements four independent 2:1 multiplexers sharing one global select (S) and one active-low enable (E). When E is HIGH, all outputs (1Y–4Y) are forced LOW regardless of S or inputs - enabling synchronous output blanking. S determines source selection: LOW selects I0 inputs, HIGH selects I1 inputs.

Input clamping diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors. The logic family supports mixed-voltage system interfacing due to wide VCC range and CMOS-level (74HC) or TTL-level (74HCT) input compatibility - critical for legacy-to-modern logic bridging and power-efficient digital subsystems.

Key Specifications

Pinout & Package

DHVQFN16 (SOT763-1) package: 2.5 mm × 3.5 mm × 0.85 mm body, thermally enhanced exposed pad (non-soldered by default), 16 terminals, leadless construction optimized for space-constrained PCB layouts and improved thermal performance over SO16/TSSOP.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LV157AQPWRQ1 and 74LVC157APW,118, the 74HC157BQ,115 offers broader supply flexibility (2.0–6.0 V), superior thermal performance via DHVQFN, and proven industrial reliability - making it optimal for mixed-voltage industrial control and legacy 5 V designs where automotive certification is unnecessary.

Availability

74HC157BQ,115 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, test equipment design, and consumer audio control systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC157BQ,115 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, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.

The 74HC157BQ,115 belongs to Nexperia's HC-series logic portfolio, designed for robust, low-power digital signal routing in space-constrained and thermally demanding applications where pin compatibility and long-term supply stability are essential.

FAQ

What is the maximum clock frequency supported by the 74HC157BQ,115?

The 74HC157BQ,115 does not operate on a clock signal - it is a combinational logic device. Its usable data rate depends on propagation delay and system timing margins. With tpd ≤ 25 ns at VCC = 4.5 V, it supports reliable switching of asynchronous control signals up to approximately 20 MHz in well-designed PCB layouts with controlled impedance and proper decoupling.

Can the 74HC157BQ,115 interface directly with 3.3 V microcontrollers?

Yes - the 74HC157BQ,115 operates down to 2.0 V and exhibits CMOS-compatible input thresholds. At VCC = 3.3 V, VIH(min) = 2.1 V and VIL(max) = 1.35 V, providing >0.95 V noise margin against standard 3.3 V GPIO outputs, eliminating the need for level-shifting circuitry in most cases.

Is the exposed thermal pad on the DHVQFN package required to be soldered?

No - the exposed pad (terminal 1 index area) is not electrically connected and has no mandatory solder requirement. If soldered, it must remain electrically floating or be connected to GND solely for thermal conduction; it must never be tied to VCC or any other voltage rail to avoid short-circuit risk.

How does the enable (E) pin behave during power-up sequencing?

The E pin is active-low and internally pulled down in many Nexperia HC devices, but the 74HC157BQ,115 has no internal pull-down. During power-up, E should be held HIGH (via external pull-up) until VCC stabilizes to prevent unintended output glitches; once powered, asserting E LOW enables normal multiplexer operation.