NXP Semiconductors N74F157AN,602

Overview

N74F157AN,602 from Philips Semiconductors is a quad 2-input non-inverting data selector/multiplexer in 16-pin plastic DIP (SOT38-4) packaging, operating at 5V ±10%, with 4.6ns typical propagation delay, 15mA typical supply current, and industrial-grade temperature range support (–40°C to +85°C). It routes four parallel data bits from one of two input buses to a common output bus under shared Select (S) and active-low Enable (E) control-commonly used in register-to-bus data routing in TTL-based digital systems.

For engineers reviewing the N74F157AN,602 datasheet, N74F157AN,602 pinout, N74F157AN,602 application, or N74F157AN,602 equivalent, key selection considerations include its non-inverting logic behavior, guaranteed 20mA low-level output drive, 4.5ns–7.5ns propagation delay across commercial/industrial ranges, and compatibility with standard 74F logic families for bus arbitration and data path switching.

Technical Context

The N74F157AN,602 implements four independent 2:1 multiplexers sharing one Select (S) and one active-low Enable (E) input. Each channel passes I0n when S = L and I1n when S = H, provided E = L; all outputs go low when E = H. Its totem-pole output structure supports fan-out of up to 33 low-state loads.

Designed for 5V TTL systems, it meets IEEE/IEC standard logic symbols for multiplexers and complies with absolute maximum ratings including VCC = –0.5V to +7.0V and output short-circuit current ≤ –150mA. Input thresholds are VIH ≥ 2.0V and VIL ≤ 0.8V, ensuring robust noise margin in mixed-signal environments.

Key Specifications

Pinout & Package

Package: 16-pin plastic dual in-line package (DIP), SOT38-4, 300 mil width, through-hole mountable with 2.54 mm pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2:1 multiplexer applications.

Compared with SN74F157N and 74ACT157PC, the N74F157AN,602 provides verified industrial temperature operation and strict 74F-family electrical compatibility-making it the sole choice for legacy system repair, military/aerospace retrofits, and environments demanding –40°C startup reliability.

Availability

N74F157AN,602 is available at Aetrix Electronics and suitable for register file switching, bus arbitration logic, test mode selection, and digital signal routing requiring stable component supply across industrial temperature ranges and long-lifecycle programs.

Supply support for N74F157AN,602 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

Philips Semiconductors (now NXP Semiconductors) is a global semiconductor innovator founded in the Netherlands, specializing in logic, analog, and automotive ICs with emphasis on industrial reliability and long-term product support.

The 74F logic family-including N74F157AN,602-was engineered for high-speed TTL-compatible digital systems requiring robust noise immunity, consistent propagation timing, and drop-in replacement capability across decades of embedded control equipment.

FAQ

What logic family does the N74F157AN,602 belong to, and what are its voltage compatibility requirements?

The N74F157AN,602 belongs to the 74F (Fast TTL) logic family. It operates from a nominal 5V supply with a recommended range of 4.5V to 5.5V. Input high-level voltage (VIH) must be ≥2.0V, and input low-level voltage (VIL) must be ≤0.8V. These thresholds ensure interoperability with standard 74LS, 74F, and 74AS devices while maintaining noise margins in noisy industrial environments. The N74F157AN,602 is not compatible with 3.3V logic families without level translation.

How does the Enable (E) input affect output behavior in the N74F157AN,602?

In the N74F157AN,602, the Enable (E) input is active-low: when E = HIGH, all four outputs (Ya–Yd) are forced LOW regardless of Select (S) or data inputs. When E = LOW, the multiplexer functions normally-routing I0n or I1n to Yn based on S. This behavior allows global output disabling for bus isolation or power sequencing, and differs from tri-state muxes since outputs remain actively driven low rather than going high-impedance.

Does the N74F157AN,602 support industrial temperature operation, and what is its rated range?

Yes, the N74F157AN,602 is specified for industrial temperature operation from –40°C to +85°C. This rating is explicitly confirmed in the Philips datasheet's Ordering Information table for the "I74F157AN" variant, and the N74F157AN,602 shares the same die and qualification-making it suitable for programmable logic controllers, motor drives, and outdoor instrumentation where ambient extremes are expected.

What is the maximum propagation delay of the N74F157AN,602 across its full operating range?

The maximum propagation delay of the N74F157AN,602 is 7.5ns for the I0n/I1n → Yn path and 11.0ns for the S → Yn path, both measured under industrial conditions (VCC = 4.5V–5.5V, Tamb = –40°C to +85°C, CL = 50pF). These values define the worst-case timing window for synchronous data routing and must be included in setup/hold analysis for clocked systems using the N74F157AN,602.

Can the N74F157AN,602 be used as a direct replacement for SN74F157N in existing PCB layouts?

Yes, the N74F157AN,602 is pin-compatible and electrically identical to the SN74F157N, sharing the same 16-pin DIP package (SOT38-4), pinout, DC/AC specifications, and functional behavior. Both meet JEDEC-standard 74F157 requirements. No PCB changes are required when substituting N74F157AN,602 for SN74F157N in legacy designs, provided sourcing traceability and lot consistency are maintained per Aetrix Electronics' quality protocols.