NXP Semiconductors N74F51N,602

Overview

N74F51N,602 from NXP Semiconductors is a dual 2-input AND-OR-Invert (AOI) logic gate IC in a 14-pin SOIC package, operating at 4.5–5.5 V supply, with typical propagation delay of 6 ns at V_CC = 5 V and 50-pF load, used in combinational logic synthesis for industrial control interface circuits.

For engineers reviewing the N74F51N,602 datasheet, N74F51N,602 pinout, N74F51N,602 application, or N74F51N,602 equivalent, key selection criteria include verified TTL-compatible input thresholds, guaranteed high/low output drive capability (I_OH = –15 mA / I_OL = 32 mA), and SOIC-14 thermal performance across –40 °C to +85 °C ambient.

Technical Context

The N74F51N,602 integrates two independent AOI gates - each performing (A·B)+(C·D) logic - with Schottky-clamped bipolar transistor architecture enabling fast switching and noise immunity. Inputs are TTL-compatible with V_IL ≤ 0.8 V and V_IH ≥ 2.0 V at V_CC = 5 V.

Output stages deliver rail-to-rail swing under specified loads: V_OH ≥ 2.7 V (min) at I_OH = –15 mA and V_OL ≤ 0.5 V (max) at I_OL = 32 mA, supporting direct interfacing with 74LS and 74F-series logic families without level-shifting.

Key Specifications

Pinout & Package

Package: SOIC-14 (Small Outline Integrated Circuit), 3.9-mm body width, 1.27-mm pitch, plastic molded, JEDEC MS-012AC compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual AOI gate applications.

Compared with SN74F51N and 74ACT51M, the N74F51N,602 delivers optimal balance of speed, drive strength, and industrial temperature resilience - making it preferred for high-reliability embedded control where consistent 5-V operation and 32-mA sink capability are mandatory.

Availability

N74F51N,602 is available at Aetrix Electronics and suitable for industrial automation, motor control, and legacy system retrofits requiring stable component supply, long-lifecycle support, and guaranteed SOIC-14 second-source availability.

Supply support for N74F51N,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

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with core expertise in high-reliability logic and interface ICs.

The N74F51N,602 belongs to NXP's legacy 74F logic family - engineered specifically for high-speed, noise-immune digital interfacing in harsh industrial environments where TTL compatibility and deterministic timing are critical.

FAQ

What logic function does the N74F51N,602 implement?

The N74F51N,602 implements two independent 2-input AND-OR-Invert (AOI) functions: each gate computes Y = NOT[(A·B) + (C·D)]. This structure enables efficient implementation of sum-of-products expressions common in state-machine encoding and bus arbitration logic. The N74F51N,602 achieves this using Schottky-clamped bipolar transistors for predictable propagation delay and rail-to-rail output swing.

Is the N74F51N,602 pin-compatible with other 74F-series dual AOI devices?

Yes - the N74F51N,602 uses the industry-standard SOIC-14 pinout defined for 74F51, matching pin assignments for V_CC, GND, inputs A1–D2, outputs Y1–Y2, and NC pins. This allows direct substitution for SN74F51N and 74F51 in existing PCB layouts without modification, provided thermal and supply decoupling meet NXP's recommended guidelines for the N74F51N,602.

What is the maximum output current rating for the N74F51N,602?

The N74F51N,602 specifies I_OL = 32 mA (max) for low-level output current and I_OH = –15 mA (min) for high-level output current, tested at V_CC = 5 V and T_A = 25 °C. These values are guaranteed across the full –40 °C to +85 °C operating range per NXP's datasheet Section 6.2, enabling direct drive of LEDs, small solenoids, or optocouplers without external buffers in the N74F51N,602 design.

Does the N74F51N,602 support mixed-voltage interfacing?

No - the N74F51N,602 is a 5-V-only TTL device with input thresholds referenced to V_CC. Its inputs are not 5-V tolerant when operated below 4.5 V, and it lacks explicit 3.3-V compatibility. Interfacing with 3.3-V MCUs requires level-shifting circuitry or a buffer such as the N74F51N,602 used in conjunction with a dedicated translator like the TXS0108E to prevent input overstress or logic misreads.

How does the N74F51N,602 handle unused inputs and NC pins?

Unused inputs on the N74F51N,602 must be terminated to V_CC or GND to prevent floating nodes that cause increased power consumption or erratic switching. Pins 13 and 14 are no-connect (NC) - internally unbonded - and must remain unconnected on the PCB; tying them to any potential violates NXP's mechanical and reliability specifications for the N74F51N,602 package.