Nexperia USA Inc. 74AHC157D-Q100J

Overview

74AHC157D-Q100 from Nexperia is an automotive-qualified quad 2-input multiplexer in SO16 package, implementing four independent 2:1 data selectors with active-low enable (E) and common select (S). It operates from 2.0 V to 5.5 V, delivers propagation delays as low as 3.2 ns (VCC = 5 V, CL = 15 pF), and supports -40 °C to +125 °C ambient operation. It functions as a logic-level 4-pole, 2-position switch for bus routing in engine control units and ADAS sensor interfaces.

For engineers reviewing the 74AHC157D-Q100 datasheet, 74AHC157D-Q100 pinout, 74AHC157D-Q100 application, or 74AHC157D-Q100 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, CMOS input compatibility, balanced tPLH/tPHL timing, Schmitt-trigger inputs for noise immunity, and support for memory chip select decoding in safety-critical automotive subsystems.

Technical Context

This device implements four parallel 2:1 multiplexers sharing one select line (S) and one active-low enable (E), with logic equations 1Y = E × (1I1 × S + 1I0 × S̅), and similarly for 2Y–4Y. All inputs accept voltages up to 7.0 V regardless of VCC, enabling mixed-voltage interfacing.

It features Schmitt-trigger action on all inputs for robust noise rejection, supports TTL-level inputs only in the AHCT variant (not this AHC version), and provides rail-to-rail output swing with VOH ≥ 3.94 V and VOL ≤ 0.36 V at VCC = 4.5 V and IO = ±8 mA.

Key Specifications

Pinout & Package

74AHC157D-Q100 uses the SO16 plastic small outline package (SOT109-1), 16-pin, 3.9 mm body width, with gull-wing leads and pin 1 index marker.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT157D-Q100, the 74AHC157D-Q100 provides superior noise immunity via Schmitt-trigger inputs and higher VIH margin, while SN74LV157AQPWRQ1 adds design flexibility at 2.5 V but trades off static power efficiency.

Availability

74AHC157D-Q100 is available at Aetrix Electronics and suitable for engine control units, ADAS camera interfaces, infotainment display drivers, and body control modules requiring stable component supply across automotive production lifecycles.

Supply support for 74AHC157D-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 semiconductor manufacturer specializing in high-performance, high-reliability logic, analog, and discrete components for automotive, industrial, and consumer markets.

The 74AHC157D-Q100 belongs to Nexperia's automotive-qualified AHC logic family, designed specifically for robust, low-power signal routing in safety-critical vehicle subsystems operating across extended temperature ranges.

FAQ

Can 74AHC157D-Q100 operate reliably at 2.0 V supply?

Yes. The device is fully specified down to 2.0 V VCC, with VIH = 1.5 V min and VOL ≤ 0.55 V at 4 mA load over -40 °C to +125 °C. Propagation delay increases to 12.5 ns (CL = 15 pF), but functionality remains guaranteed per datasheet Table 5 and Table 6.

What is the function of the Schmitt-trigger inputs?

All inputs feature Schmitt-trigger action with typical hysteresis of 0.3 V at VCC = 3.3 V. This prevents false triggering from slow-rising or noisy signals-critical for automotive harnesses where EMI and crosstalk are prevalent-and eliminates need for external RC filtering.

Is pin 1 index orientation consistent across SO16, TSSOP16, and DHVQFN16 packages?

Yes. All three packages (SOT109-1, SOT403-1, SOT763-1) follow JEDEC-standard pin 1 indexing: corner with notch, bevel, or dot adjacent to pin 1. Pin 1 location is top-left in top-down view with marking feature at that corner, confirmed in Figures 8–10 of the datasheet.

How does the active-low enable (E) interact with output states during power-up?

When VCC ramps from 0 V, E must remain HIGH until VCC exceeds 1.5 V to ensure all outputs stay LOW and prevent bus contention. Internal power-on reset circuitry guarantees E is sampled only after VCC stabilization, per functional description Section 6 and Figure 3.