Nexperia USA Inc. 74HC157BQ-Q100,115

Overview

74HC157BQ-Q100 from Nexperia is a quad 2-input CMOS multiplexer with automotive AEC-Q100 Grade 1 qualification, operating from -40 °C to +125 °C and supporting 2.0 V to 6.0 V supply. It features active-low enable (E), common select (S), non-inverting data path, and clamp diodes for overvoltage-tolerant input interfacing - used in automotive body control modules for signal routing between sensor banks and microcontroller inputs.

For engineers reviewing the 74HC157BQ-Q100 datasheet, 74HC157BQ-Q100 pinout, 74HC157BQ-Q100 application, or 74HC157BQ-Q100 equivalent, key selection criteria include its 16-terminal DHVQFN package with side-wettable flanks, TTL-compatible 74HCT variant option, propagation delay down to 10 ns at 6 V, ±25 mA output drive, and AEC-Q100 temperature range compliance.

Technical Context

The device implements four independent 2:1 multiplexers sharing one global select (S) and one active-low enable (E) input. Each channel routes either I0 or I1 to Y based on S state, with E overriding all outputs to LOW when HIGH. Inputs are CMOS-level compatible (74HC) and tolerate voltages beyond VCC via integrated clamp diodes.

Its logic behavior is fully static and rail-to-rail compatible across the 2.0–6.0 V range, with guaranteed VIH/VIL thresholds defined per VCC level (e.g., VIH ≥ 4.2 V at VCC = 6.0 V). Propagation delays are specified for three paths: data inputs (nI0/nI1) to output (nY), select (S) to nY, and enable (E) to nY - enabling precise timing analysis in synchronous automotive subsystems.

Key Specifications

Pinout & Package

DHVQFN16 package (SOT763-1): 2.5 × 3.5 × 0.85 mm body, no leads, side-wettable flanks for AOI-compatible solder joint inspection. Thermal pad (terminal 1 index area) is electrically isolated - may be left floating or connected to GND per layout requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HCT157BQ-Q100, the HC variant offers superior noise immunity and lower static current at 3.3 V operation, while SN74LV4052AQPWRQ1 trades digital precision for analog flexibility - making each optimal for distinct signal-domain requirements in automotive subsystems.

Availability

74HC157BQ-Q100 is available at Aetrix Electronics and suitable for automotive body control units, instrument clusters, and engine management systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC157BQ-Q100 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 Dutch semiconductor manufacturer specializing in high-volume logic, discrete, and MOSFET solutions optimized for automotive, industrial, and consumer applications.

The 74HC157-Q100 series belongs to Nexperia's automotive-qualified logic portfolio, designed specifically to replace legacy 74-series devices in safety-critical vehicle subsystems while meeting AEC-Q100 Grade 1 reliability and thermal performance targets.

FAQ

What is the maximum clock frequency supported by the 74HC157BQ-Q100?

The 74HC157BQ-Q100 does not operate on a clock; it is a combinational logic device. Its usable signal switching rate depends on propagation delay and transition time. At VCC = 6.0 V, tpd ≤ 21 ns and tt ≤ 13 ns, supporting reliable data routing for digital signals with edge rates up to ~50 MHz - verified via dynamic characteristics in Table 7 of the datasheet.

Can the thermal pad (terminal 1 index area) be left unconnected?

Yes - the thermal pad (GND(1)) is electrically isolated and has no internal connection. Per Nexperia's datasheet Section 5.1, it may remain floating or be connected to GND solely for mechanical stability or thermal relief. No electrical functionality depends on this pad, and soldering it is optional.

How does the enable (E) input interact with the select (S) input?

E is asynchronous and dominant: when E = HIGH, all four outputs (1Y–4Y) are forced LOW regardless of S state or input values. Only when E = LOW does S determine whether I0 or I1 is passed to each Y output. This priority logic enables hardware-level signal blanking during system reset or fault conditions.

Is the 74HC157BQ-Q100 compatible with 3.3 V microcontroller GPIOs?

Yes - at VCC = 3.3 V, VIH is guaranteed ≥ 2.1 V (per Table 6), comfortably exceeding typical 3.3 V MCU HIGH output (≥ 2.4 V). VOH at 4 mA load is ≥ 2.9 V, ensuring solid HIGH recognition by receiving 3.3 V logic. Full compatibility is confirmed across -40 °C to +125 °C.