Nexperia USA Inc. 74AHC157PW,112

Overview

74AHC157PW,112 from Nexperia is a quad 2-input CMOS multiplexer in TSSOP16 package, operating from 2.0 V to 5.5 V, with 8 ns typical propagation delay at 5 V and 50 pF load, active-low enable (E), and common select (S) controlling data routing from two 4-bit sources to four outputs. It serves as a logic-level 4-pole, 2-position switch in digital bus selection and function generation circuits.

For engineers reviewing the 74AHC157PW,112 datasheet, 74AHC157PW,112 pinout, 74AHC157PW,112 application, or 74AHC157PW,112 equivalent, this page delivers verified functional behavior, validated pin mapping for TSSOP16, real-world timing under load, CMOS-level input compatibility, and direct substitution guidance against industry-standard alternatives.

Technical Context

The 74AHC157PW implements four independent 2:1 multiplexers sharing one select (S) and one active-low enable (E) control line. Each output (1Y–4Y) follows Y = E̅ × (I₁ × S + I₀ × S̅), enabling simultaneous 4-bit data path selection between two register banks.

All inputs feature Schmitt-trigger action and tolerate voltages up to 7.0 V, while outputs drive ±8 mA at VCC = 4.5 V. The device operates across –40 °C to +125 °C and meets JEDEC standard no. 7A for LSTTL pin compatibility.

Key Specifications

Pinout & Package

TSSOP16 package (SOT403-1): 4.4 mm body width, 0.65 mm lead pitch, 16-terminal surface-mount outline optimized for automated placement and thermal performance in space-constrained PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT157PW,112, the 74AHC157PW offers broader VCC support and lower static current but requires CMOS-level inputs; versus SN74LVC157APWR, it adds 5 V tolerance and industrial temp range at the cost of slightly higher propagation delay in 3.3 V systems.

Availability

74AHC157PW,112 is available at Aetrix Electronics and suitable for industrial bus multiplexing, microcontroller peripheral selection, digital function generation, and memory address decoding requiring stable component supply across extended temperature ranges.

Supply support for 74AHC157PW,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 semiconductor manufacturer specializing in high-performance logic, analog, and discrete components, with core expertise in energy-efficient, reliable silicon solutions for industrial and automotive markets.

The 74AHC series targets high-speed, low-power digital logic applications requiring robust noise immunity, wide supply voltage operation, and seamless integration with both CMOS and legacy TTL systems.

FAQ

What is the maximum clock frequency supported by the 74AHC157PW,112?

The 74AHC157PW,112 does not operate as a clocked device but as combinational logic. Its usable data rate depends on propagation delay and load: with 50 pF load and 5 V supply, tpd ≤ 8.0 ns supports reliable switching up to ~60 MHz for clean edges. System-level timing must account for setup/hold margins relative to controlling signals (S and E).

Can the 74AHC157PW,112 interface directly with 3.3 V microcontrollers?

Yes. At VCC = 3.3 V, VIH = 2.1 V (min) and VIL = 0.9 V (max), fully compatible with standard 3.3 V CMOS outputs. Outputs swing rail-to-rail (VOH ≥ 3.1 V, VOL ≤ 0.36 V at IO = ±4 mA), ensuring noise margin > 0.4 V for downstream 3.3 V inputs.

Is the TSSOP16 package of the 74AHC157PW,112 RoHS compliant and lead-free?

Yes. The 74AHC157PW,112 uses Nexperia's standard RoHS-compliant, lead-free TSSOP16 (SOT403-1) package with matte tin termination. It meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and is rated for peak reflow temperatures up to 260 °C.

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

During power-up, if E rises before VCC stabilizes, outputs may glitch. To ensure defined behavior, tie E to VCC via a pull-up resistor (e.g., 10 kΩ) and assert E only after VCC exceeds 2.0 V. The datasheet specifies that outputs remain LOW while E is HIGH, providing inherent power-on reset behavior when E is controlled by a supervisor IC.