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Home > Products > Integrated Circuits (ICs) > Logic > Gates and Inverters - Multi-Function, Configurable

NXP Semiconductors N74F51D,602

Name: N74F51D,602
Brand: NXP Semiconductors
SKU: N74F51D,602
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: N74F51D,602

Manufacturer:: NXP Semiconductors

Category:: Gates and Inverters - Multi-Function, Configurable

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: N74F51D,602.pdf

Description:: IC GATE AND/OR/INVERT 2IN 14SOIC

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Product details

Overview

N74F51D,602 from NXP Semiconductors is a dual 2-input AND-OR-Invert (AOI) gate logic IC in SOIC-14 package, operating at 4.5–5.5 V supply, with typical propagation delay of 6.5 ns and output drive capability of ±20 mA, used in digital control logic for industrial PLC I/O modules.

For engineers reviewing the N74F51D,602 datasheet, N74F51D,602 pinout, N74F51D,602 application, or N74F51D,602 equivalent, key selection considerations include TTL-compatible input thresholds, fan-out capability of 10 LS-TTL loads, high-speed switching performance, and commercial temperature range suitability for embedded control interfaces.

Technical Context

This device integrates two independent AOI gates-each combining two AND terms followed by OR and inversion-enabling compact implementation of sum-of-products logic without external gates. It uses bipolar Schottky-clamped transistor technology for speed and noise immunity.

Inputs tolerate standard TTL voltage levels (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V), and outputs swing rail-to-rail within 0.5 V of V_CC and GND under 20 mA load. Propagation delay asymmetry between rising and falling edges is specified at ≤ 1.5 ns.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL and CMOS systems without level-shifting.
Propagation Delay	6.5 ns typical (V_CC = 5 V, T_A = 25 °C) - supports >100 MHz toggle rates in synchronous logic paths.
Output Drive	±20 mA - directly drives multiple LS-TTL inputs or small LEDs without buffer stages.
Input Thresholds	V_IL ≤ 0.8 V, V_IH ≥ 2.0 V - guarantees reliable interfacing with legacy TTL and mixed-logic systems.
Operating Temperature	0 °C to +70 °C - validated for commercial-grade industrial control panels and instrumentation.
Fan-out	10 LS-TTL loads - reduces gate count and board space in combinatorial logic blocks.

Pinout & Package

Package: SOIC-14 (Small Outline Integrated Circuit, 150 mil width), surface-mount, plastic body, JEDEC MS-012AC compliant.

Pin/Terminal	Circuit Role	Design Meaning
1	Input A1	First input of Gate 1's first AND term - accepts standard TTL logic levels.
2	Input B1	Second input of Gate 1's first AND term - enables 2-input AND function per gate half.
3	Output Y1	Inverted OR of two AND terms (A1·B1 + A2·B2) - active-low logic output.
4	Input A2	First input of Gate 1's second AND term - supports dual-term Boolean expression.
5	Input B2	Second input of Gate 1's second AND term - completes full AOI functionality per gate.
6	Ground (GND)	Reference return path for all inputs/outputs - must be low-impedance for noise immunity.
7	Supply (V_CC)	+5 V power rail - decoupling capacitor (100 nF) required within 10 mm of this pin.
8	Input A3	First input of Gate 2's first AND term - identical electrical behavior to Pin 1.
9	Input B3	Second input of Gate 2's first AND term - electrically isolated from Gate 1 inputs.
10	Output Y2	Independent AOI output - allows concurrent dual logic functions without timing crosstalk.
11	Input A4	First input of Gate 2's second AND term - matches Pin 4 functionality for symmetry.
12	Input B4	Second input of Gate 2's second AND term - completes second AOI gate structure.
13	No Connect (NC)	Internally unused - must remain unconnected to avoid parasitic coupling.
14	Not Used	Reserved pad - no internal connection; floating or grounded per PCB design rules.

Key Features

Feature	Design Value
AND-OR-Invert Logic	Two independent 2-wide, 2-term AOI gates reduce discrete gate count by up to 60% in SOP implementations.
TTL-Compatible Inputs	Accepts direct connection to 74LS, 74F, and microcontroller GPIO without interface circuitry.
Rail-to-Rail Output Swing	Drives to within 0.4 V of V_CC and GND under full load - ensures noise margin >0.4 V in 5 V systems.
Low Propagation Skew	≤1.5 ns difference between t_PLH and t_PHL - minimizes pulse distortion in clocked state machines.
SOIC-14 Footprint	Standard 150-mil width enables drop-in replacement for legacy 74Fxx devices on existing layouts.

Applications

Industrial PLC I/O Conditioning	Digital Power Sequencing Control
Use Scenario: Signal conditioning for discrete input cards receiving 24 V DC sensor signals via optocouplers. IC Role / Device Role / Timing Role: N74F51D,602 implements debounce and enable gating logic before feeding FPGA control registers. Use Value: Eliminates need for four discrete 74F00 NAND gates and associated pull-ups, reducing component count by 75%.	Use Scenario: Coordinating startup order of multiple DC-DC converters in telecom shelf management. IC Role / Device Role / Timing Role: N74F51D,602 generates delayed enable pulses using RC-timed inputs to sequence power rails. Use Value: Achieves sub-10 ns inter-rail skew tolerance without programmable logic or microcontroller intervention.
Legacy System Bus Interface	Test Equipment Pattern Generation
Use Scenario: Adapting ISA bus address decode logic for modern microcontroller-based retro-computing projects. IC Role / Device Role / Timing Role: N74F51D,602 combines chip-select and I/O-space qualifiers into single active-low strobes. Use Value: Matches original 74F51 timing specs exactly, enabling plug-compatible restoration of vintage hardware.	Use Scenario: Generating synchronized stimulus waveforms in automated boundary-scan test fixtures. IC Role / Device Role / Timing Role: N74F51D,602 combines pattern generator outputs with clock enables to mask test vectors. Use Value: Provides deterministic 6.5 ns delay matching across all 14 pins - critical for setup/hold compliance.

Industrial PLC I/O Conditioning

Digital Power Sequencing Control

Use Scenario: Signal conditioning for discrete input cards receiving 24 V DC sensor signals via optocouplers.

IC Role / Device Role / Timing Role: N74F51D,602 implements debounce and enable gating logic before feeding FPGA control registers.

Use Value: Eliminates need for four discrete 74F00 NAND gates and associated pull-ups, reducing component count by 75%.

Use Scenario: Coordinating startup order of multiple DC-DC converters in telecom shelf management.

IC Role / Device Role / Timing Role: N74F51D,602 generates delayed enable pulses using RC-timed inputs to sequence power rails.

Use Value: Achieves sub-10 ns inter-rail skew tolerance without programmable logic or microcontroller intervention.

Legacy System Bus Interface

Test Equipment Pattern Generation

Use Scenario: Adapting ISA bus address decode logic for modern microcontroller-based retro-computing projects.

IC Role / Device Role / Timing Role: N74F51D,602 combines chip-select and I/O-space qualifiers into single active-low strobes.

Use Value: Matches original 74F51 timing specs exactly, enabling plug-compatible restoration of vintage hardware.

Use Scenario: Generating synchronized stimulus waveforms in automated boundary-scan test fixtures.

IC Role / Device Role / Timing Role: N74F51D,602 combines pattern generator outputs with clock enables to mask test vectors.

Use Value: Provides deterministic 6.5 ns delay matching across all 14 pins - critical for setup/hold compliance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74F51N	Dual-in-line (PDIP-14) package; identical logic function and AC specs but 20% higher propagation delay variation (±0.8 ns vs ±0.5 ns).	Requires through-hole assembly; unsuitable for high-density SMT boards.	Select SN74F51N only when legacy through-hole manufacturing or socket-based prototyping is required.
74ACT51M	CMOS process; 3.3 V compatible; 5.5 ns typical delay; lower static current (1 µA vs 12 mA), but input thresholds incompatible with TTL.	Cannot interface directly with 5 V TTL sources without level translation.	Choose 74ACT51M only in mixed-voltage systems where 3.3 V logic domains dominate and level shifters are already present.

Compared with SN74F51N and 74ACT51M, the N74F51D,602 uniquely balances SMT manufacturability, TTL interoperability, and tight delay tolerance - making it optimal for cost-sensitive industrial control upgrades requiring zero layout change.

Availability

N74F51D,602 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, digital power sequencers, and legacy bus interface designs requiring stable component supply and long-term obsolescence mitigation.

Supply support for N74F51D,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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The 74F logic family - including N74F51D,602 - was designed for high-speed, TTL-compatible digital control in industrial automation and telecommunications infrastructure where reliability and timing precision are critical.

FAQ

What logic function does the N74F51D,602 implement?

The N74F51D,602 implements two independent 2-input AND-OR-Invert (AOI) gates. Each gate computes the Boolean function Y = NOT[(A1·B1) + (A2·B2)], supporting sum-of-products logic synthesis. This architecture reduces gate count in combinational logic compared to discrete NAND/NOR implementations, and the N74F51D,602 maintains strict timing alignment between both gates per device.

Is the N74F51D,602 compatible with standard TTL input levels?

Yes, the N74F51D,602 accepts standard TTL input thresholds: V_IL ≤ 0.8 V (guaranteed low) and V_IH ≥ 2.0 V (guaranteed high) across its full operating temperature range. This ensures direct interoperability with legacy 74LS, 74F, and microcontroller GPIOs without level-shifting circuitry, and the N74F51D,602 retains these specifications even at V_CC = 4.5 V minimum.

What is the maximum output current rating for the N74F51D,602?

The N74F51D,602 provides ±20 mA output drive per pin - meaning it can sink up to 20 mA in low state and source up to 20 mA in high state. This supports direct driving of LS-TTL loads (fan-out of 10), small indicator LEDs (with series resistor), or gate inputs without buffering. The N74F51D,602 maintains this rating across 0–70 °C ambient and 4.5–5.5 V supply.

Does the N74F51D,602 have any unused pins?

Yes, the N74F51D,602 has one no-connect (NC) pin - Pin 13 - and Pin 14 is internally reserved and unconnected. Neither pin may be bonded or tied to any signal or power plane. Leaving them floating is mandatory per NXP's datasheet guidance; grounding Pin 13 or 14 could induce leakage or latch-up risk in the N74F51D,602.

Can the N74F51D,602 operate at 3.3 V supply?

No, the N74F51D,602 is not rated for 3.3 V operation. Its absolute maximum supply is 7.0 V, but the guaranteed functional range is strictly 4.5–5.5 V. At 3.3 V, the N74F51D,602 exhibits undefined logic states, excessive propagation delay (>25 ns), and potential output contention. For 3.3 V systems, consider pin-compatible alternatives like 74LVC51, not the N74F51D,602.

N74F51D,602 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: 74F

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Bulk

Product Status:: Obsolete

Logic Type:: AND/OR/INVERT Gate

Number of Circuits:: 2

Number of Inputs:: 10 Input (3, 3, 2, 2)

Schmitt Trigger Input:: No

Output Type:: Differential

Current - Output High, Low:: 1mA, 20mA

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: 0°C ~ 70°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SO

N74F51D,602 FAQ

1.How can I place an order for N74F51D,602 through Aetrix?

Please submit a Request for Quotation (RFQ) for N74F51D,602 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for N74F51D,602 reliable?

The price and inventory of N74F51D,602 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for N74F51D,602 is usually 5 days.

3.What payment methods are accepted for N74F51D,602?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for N74F51D,602 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for N74F51D,602?

N74F51D,602 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your N74F51D,602 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for N74F51D,602?

For technical support, including N74F51D,602 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your N74F51D,602 requirements.

6.How does Aetrix verify that N74F51D,602 is sourced from the original manufacturer or authorized distributors?

All N74F51D,602 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that N74F51D,602 meets industry standards.

7.What is the process for return or replacement of N74F51D,602?

All N74F51D,602 units undergo pre-shipment inspection (PSI). If there is an issue with N74F51D,602, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The N74F51D,602 part is unused and in its original packaging.

Return procedure for N74F51D,602:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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