NXP Semiconductors N74F158AD,602

Overview

N74F158AD,602 from Philips Semiconductors is a quad 2-input inverting data selector/multiplexer in 16-pin SO package (SOT109-1), operating at 4.5–5.5 V, with 3.7 ns typical propagation delay, 14 mA typical supply current, and industrial-grade output drive (20 mA sink). It routes four parallel data bits from one of two input sources to inverted outputs under shared Select (S) and active-low Enable (E) control-used in bus arbitration and register-to-bus data routing.

For engineers reviewing the N74F158AD,602 datasheet, N74F158AD,602 pinout, N74F158AD,602 application, or N74F158AD,602 equivalent, key selection criteria include its inverting output logic, 20 mA low-state drive capability, 3.7 ns propagation delay on data-to-output paths, and compatibility with 5 V TTL/FAST logic families in space-constrained SO packaging.

Technical Context

The N74F158AD,602 implements four independent 2:1 multiplexers with common S and E inputs, where each Yn output equals NOT(I0n) when S = L and NOT(I1n) when S = H, provided E = L; all outputs go HIGH when E = H. Its internal structure uses standard TTL-compatible bipolar transistor logic with totem-pole outputs.

It operates strictly within 5 V ±10% supply and supports commercial temperature range (0°C to +70°C) per ordering code N74F158AD. Input thresholds are VIH ≥ 2.0 V and VIL ≤ 0.8 V; output voltage specs are VOH ≥ 2.5 V (I_OH = –1 mA) and VOL ≤ 0.5 V (I_OL = 20 mA).

Key Specifications

Pinout & Package

Package: 16-pin plastic small outline (SO), body width 3.9 mm, JEDEC MS-012 compliant (SOT109-1), surface-mountable with gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74F158N and 74ACT158M, the N74F158AD,602 offers identical logic function and speed in a space-saving SO package optimized for automated SMT assembly, while maintaining full compatibility with legacy 5 V TTL signal levels and drive strength.

Availability

N74F158AD,602 is available at Aetrix Electronics and suitable for ALU operand routing, bus arbitration logic, and LED driver interface applications requiring stable component supply and long-term industrial availability.

Supply support for N74F158AD,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, delivering logic, analog, and interface ICs for industrial, computing, and communications systems.

The 74F Fast TTL logic family-including N74F158AD,602-was engineered for high-speed, low-noise 5 V digital systems requiring reliable propagation delay and robust fan-out in commercial environments.

FAQ

What is the logic behavior of the N74F158AD,602 when Enable (E) is HIGH?

When Enable (E) is HIGH, all four outputs (Ya–Yd) of the N74F158AD,602 are forced HIGH regardless of Select (S) or input states. This active-high disable ensures predictable bus release in multiplexed systems. The N74F158AD,602 does not tri-state; it actively drives HIGH, making it unsuitable for wired-OR bus topologies without external isolation.

Does the N74F158AD,602 support operation at 3.3 V supply?

No, the N74F158AD,602 is specified only for 4.5–5.5 V operation and is not 3.3 V compatible. Its input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and output drive characteristics assume a 5 V rail. Using it at 3.3 V may result in marginal noise margins, undefined switching, or excessive ICC. For 3.3 V systems, consider 74ACT158M instead of N74F158AD,602.

How does the N74F158AD,602 differ from the N74F157AD,602?

The N74F158AD,602 provides inverting outputs (Yn = NOT(selected input)), whereas N74F157AD,602 provides non-inverting outputs (Yn = selected input). Both share identical pinout, timing (3.7 ns vs. 4.6 ns), supply current (14 mA vs. 15 mA), and control logic. The choice depends solely on whether system-level logic polarity requires inversion at the mux stage.

Can the N74F158AD,602 drive standard TTL loads directly?

Yes-the N74F158AD,602 can drive up to 10 standard TTL unit loads (each defined as 40 µA HIGH / 1.6 mA LOW) per output, based on its 1.0 mA HIGH / 20 mA LOW output ratings. Its 50/33 fan-out ratio (HIGH/LOW) confirms compatibility with legacy TTL buses without buffering, provided total capacitive load remains ≤50 pF.

Is the N74F158AD,602 pin-compatible with SOIC-16 footprints from other manufacturers?

Yes-the N74F158AD,602 uses standard JEDEC MS-012 SOIC-16 dimensions (body width 3.9 mm, lead pitch 1.27 mm), matching industry-wide SOIC-16 land patterns. Pin 1 marking, lead form, and thermal profile align with IPC-7351B Class B, enabling drop-in replacement across brands including TI, ON Semiconductor, and Fairchild-provided logic function and timing requirements match.