Nexperia USA Inc. 74AHCT157BQ-Q100X

Overview

74AHCT157BQ-Q100 from Nexperia is an automotive-qualified quad 2-input multiplexer in DHVQFN16 package, operating at 4.5–5.5 V with TTL-compatible inputs, 8 ns typical propagation delay (CL = 50 pF), active-low enable (E), and common select (S) controlling four independent 2:1 data paths. It functions as a logic-level 4-pole, 2-position switch for bus routing in engine control units and ADAS domain controllers.

For engineers reviewing the 74AHCT157BQ-Q100 datasheet, 74AHCT157BQ-Q100 pinout, 74AHCT157BQ-Q100 application, or 74AHCT157BQ-Q100 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (-40 °C to +125 °C), TTL input threshold compatibility, enable-controlled output disable behavior, and DHVQFN thermal-enhanced packaging for high-density automotive PCBs.

Technical Context

The device implements four independent 2:1 multiplexers sharing one common select (S) and one active-low enable (E). Each output (1Y–4Y) follows Y = E̅ × (I₁ × S + I₀ × S̅), enabling deterministic data routing from two parallel 4-bit sources. All inputs feature Schmitt-trigger action and tolerate voltages up to 7.0 V independent of VCC.

It supports memory chip select decoding and irregular logic synthesis by generating any four of the 16 possible two-variable Boolean functions-using S as the common variable and I₀/I₁ as operand pairs. Propagation delays are balanced across all channels, minimizing skew in synchronized data path switching.

Key Specifications

Pinout & Package

DHVQFN16 (SOT763-1) package: 2.5 mm × 3.5 mm × 0.85 mm body, side-wettable flanks for AOI-compatible solder joint inspection, no leads, 16 copper terminals, exposed 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 74AHC157BQ-Q100, this part offers TTL-level compatibility essential for legacy 5 V systems, while SN74LV4052AQPWRQ1 adds analog signal handling at the cost of higher on-resistance and reduced digital speed - making the 74AHCT157BQ-Q100 optimal for pure digital, high-reliability automotive control paths.

Availability

74AHCT157BQ-Q100 is available at Aetrix Electronics and suitable for engine control units, ADAS domain controllers, instrument clusters, and body control modules requiring stable component supply across automotive production lifecycles.

Supply support for 74AHCT157BQ-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 delivering high-performance, high-reliability logic, discrete, and MOSFET solutions optimized for automotive, industrial, and consumer applications.

The 74AHCT157-Q100 belongs to Nexperia's automotive-qualified logic family, designed specifically for robust signal routing and combinatorial logic implementation in harsh-environment electronic control units.

FAQ

Is the thermal pad on the DHVQFN package electrically connected?

No - the exposed thermal pad (terminal 1 index area) is not electrically connected to any internal circuitry. Per Nexperia's datasheet, it has no electrical or mechanical requirement to be soldered; if connected, it must remain floating or tied to GND to avoid unintended coupling or thermal stress.

Can 74AHCT157BQ-Q100 operate at 3.3 V supply?

No - the 74AHCT variant is specified only for 4.5 V to 5.5 V operation per Table 5. At 3.3 V, input thresholds (VIH ≥ 2.0 V) become non-compliant with standard TTL logic, risking unreliable switching; use 74AHC157BQ-Q100 instead for 3.3 V systems.

What is the maximum clock frequency supported for data switching?

Based on worst-case propagation delay (13.5 ns) and minimum pulse width constraints, the device supports reliable data switching up to 37 MHz (1/13.5 ns) in synchronous applications. For asynchronous routing, setup/hold margins require ≥20 ns minimum S/E transition spacing per functional table timing analysis.

Does the device support hot insertion or live swapping?

No - the datasheet does not specify hot-swap capability. Absolute maximum ratings show VI limits of -0.5 V to +7.0 V, but no controlled power-up sequencing or I/O clamp current specs for partial-power conditions. Use external protection circuitry if live insertion is required.