Nexperia USA Inc. 74AHC157BQ-Q100X

Overview

74AHC157BQ-Q100 from Nexperia is an automotive-qualified quad 2-input multiplexer in DHVQFN16 package, operating from 2.0 V to 5.5 V with CMOS-level inputs, 8 ns typical propagation delay (VCC = 5 V, CL = 50 pF), Schmitt-trigger inputs, and active-low enable (E). It routes four parallel data bits from two sources (I0/I1) to four outputs (Y1–Y4) under common select (S) control-used in automotive body control modules for signal routing between sensor banks and MCU interfaces.

For engineers reviewing the 74AHC157BQ-Q100 datasheet, 74AHC157BQ-Q100 pinout, 74AHC157BQ-Q100 application, or 74AHC157BQ-Q100 equivalent, key selection criteria include AEC-Q100 Grade 1 qualification (-40 °C to +125 °C), input voltage tolerance beyond VCC, balanced tPLH/tPHL timing, low static ICC (<80 μA at VCC = 5.5 V), and compatibility with 3.3 V/5 V mixed-signal systems.

Technical Context

The 74AHC157BQ-Q100 implements four independent 2:1 multiplexers sharing one data select (S) and one active-low enable (E) input. Its logic equations are Yn = E̅ × (In1 × S + In0 × S̅), enabling simultaneous 4-bit bus selection without internal fanout constraints. All inputs feature Schmitt-trigger action for noise immunity on slow-rising signals.

It operates across 2.0 V–5.5 V supply range with VIH/VIL thresholds scaling with VCC (e.g., VIH = 3.85 V min at VCC = 5.5 V), supporting both 3.3 V and 5 V logic domains. Propagation delays are tightly balanced (Δtpd < 1.5 ns across channels at VCC = 5 V), critical for synchronous data routing in automotive gateway ECUs.

Key Specifications

Pinout & Package

DHVQFN16 package (SOT763-1), 2.5 mm × 3.5 mm × 0.85 mm body, side-wettable flanks for AOI-compatible solder joint inspection, no leads, 16 copper terminals, thermal pad (non-electrical, optional GND connection).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT157BQ-Q100, the subject part offers superior noise immunity via Schmitt-trigger inputs and broader VCC range, while SN74LV4052AQPWRQ1 trades digital control simplicity for analog signal fidelity-making 74AHC157BQ-Q100 optimal for deterministic digital path selection in harsh automotive environments.

Availability

74AHC157BQ-Q100 is available at Aetrix Electronics and suitable for automotive body control units, instrument cluster signal routing, ADAS camera module interfaces, and infotainment system bus steering requiring stable component supply across extended temperature ranges and AEC-Q100 compliance.

Supply support for 74AHC157BQ-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 global semiconductor expert focused on essential efficiency technologies, delivering high-performance logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74AHC157BQ-Q100 belongs to Nexperia's AEC-Q100-qualified automotive logic family, designed specifically for robust signal routing in safety-critical vehicle subsystems where reliability, thermal stability, and ESD resilience are mandatory.

FAQ

Is the 74AHC157BQ-Q100 pin-compatible with standard 74LS157 devices?

Yes-it is pin-compatible with Low Power Schottky TTL (LSTTL) devices like 74LS157, sharing identical SO16, TSSOP16, and DHVQFN16 footprints and pin assignments. However, it requires no pull-up resistors on inputs and draws significantly less quiescent current (80 μA vs. ~15 mA), reducing system power load.

Can the 74AHC157BQ-Q100 operate reliably at 2.0 V supply?

Yes-the device is fully specified down to 2.0 V supply, with guaranteed VIH = 1.5 V min and VOL = 0.55 V max at 4 mA output load. Propagation delay increases to 12.5 ns (CL = 50 pF), but functionality remains intact for low-power wake-up circuits in battery-supplied automotive modules.

What is the function of the exposed thermal pad on the DHVQFN16 package?

The exposed pad (terminal 1 index area) has no electrical function and requires no solder connection. If soldered, it must remain electrically floating or be tied to GND; it serves solely for mechanical stability and thermal conduction to the PCB, improving power dissipation by ~15% under continuous operation.

Does the 74AHC157BQ-Q100 support hot insertion or live swapping?

No-this device lacks Ioff protection or power-off isolation. Applying input signals while VCC = 0 V may cause latch-up or excessive current through input clamps. Always ensure VCC is stable before asserting any inputs, especially in modular automotive subassemblies with staggered power sequencing.