Nexperia USA Inc. 74AHC157D,112

Overview

74AHC157D,112 from Nexperia is a quad 2-input CMOS multiplexer in SO16 package, operating from 2.0 V to 5.5 V, with propagation delay as low as 3.2 ns (VCC = 5 V, CL = 15 pF), active-low enable (E), and common select (S) controlling four independent 2:1 data paths - used for bus routing, function generation, and memory chip select decoding in industrial control logic.

For engineers reviewing the 74AHC157D,112 datasheet, 74AHC157D,112 pinout, 74AHC157D,112 application, or 74AHC157D,112 equivalent, key selection criteria include its CMOS-level input compatibility, -40 °C to +125 °C temperature rating, 16-pin SO package footprint, and guaranteed low-output leakage (<0.1 μA) across full voltage range.

Technical Context

The 74AHC157D implements four independent 2:1 multiplexers sharing one common select (S) and one active-low enable (E), with each output (1Y–4Y) driven only when E = LOW. Its logic equations follow Yn = E̅ × (In1 × S + In0 × S̅), enabling deterministic signal routing without internal latching or clocking.

All inputs feature Schmitt-trigger action and tolerate voltages up to 7.0 V regardless of VCC, while outputs drive ±8 mA at VCC = 4.5 V and maintain VOL ≤ 0.36 V (IO = 8 mA). The device supports TTL-compatible operation only in AHCT variant; this AHC version strictly accepts CMOS input thresholds (VIH ≥ 3.85 V at VCC = 5.5 V).

Key Specifications

Pinout & Package

74AHC157D,112 is housed in a plastic small outline package (SO16, SOT109-1) with 3.9 mm body width, 16 leads, and standard 1.27 mm pitch - compatible with IPC-7351B SOIC-16 land patterns and reflow soldering profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT157D,112, the 74AHC157D,112 offers superior noise margin and lower ICC but requires CMOS-level drivers; versus SN74LVC157APWR, it delivers 3× faster speed at 5 V and full industrial temperature support, at the cost of higher minimum VCC.

Availability

74AHC157D,112 is available at Aetrix Electronics and suitable for industrial PLCs, motor drive controllers, and embedded instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AHC157D,112 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-performance logic, analog, and discrete components for industrial, automotive, and computing applications.

The 74AHC logic family was designed for high-speed, low-power CMOS-compatible digital interfacing in harsh environments - emphasizing robustness, predictable timing, and wide supply tolerance.

FAQ

What is the maximum clock frequency supported by 74AHC157D,112?

The 74AHC157D,112 has no internal clock; it is asynchronous. Its usable data rate depends on propagation delay and load capacitance. With CL = 15 pF and VCC = 5 V, tpd = 3.2 ns (typ), supporting clean signal routing up to ~150 MHz toggle rate in point-to-point configurations. System-level timing must account for setup/hold margins relative to control edges on S and E.

Can 74AHC157D,112 interface directly with 3.3 V microcontrollers driving 5 V-tolerant inputs?

Yes - its inputs accept voltages up to 7.0 V independent of VCC, so a 3.3 V MCU GPIO can safely drive S, E, or data inputs even when VCC = 5 V. Outputs swing rail-to-rail (0 V to 5 V), requiring level-shifting if feeding a 3.3 V-only receiver. No external clamping diodes are needed.

Is the SO16 package (SOT109-1) lead-free and RoHS compliant?

Yes - 74AHC157D,112 is manufactured in a lead-free, RoHS-compliant SO16 package per Nexperia's standard product policy. The device meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) and is rated for standard reflow profiles including Pb-free SAC305 peak temperatures up to 260 °C.

Does the 74AHC157D,112 require external pull-up or pull-down resistors on unused inputs?

No - all inputs have Schmitt-trigger action and defined thresholds, but floating inputs are not recommended. For unused channels, tie I0/I1 to GND or VCC (not left open), and hold S at fixed logic level. E should be pulled LOW (active) if always enabled, or controlled actively - never left floating due to its direct impact on output state.