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Home > Products > Integrated Circuits (ICs) > Logic > Flip Flops

NXP Semiconductors N74F574N,602

Name: N74F574N,602
Brand: NXP Semiconductors
SKU: N74F574N,602
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: N74F574N,602

Manufacturer:: NXP Semiconductors

Category:: Flip Flops

Package:: 20-DIP (0.300", 7.62mm)

Datasheet:: N74F574N,602.pdf

Description:: IC FF D-TYPE SNGL 8BIT 20DIP

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Product details

Overview

N74F574N,602 from Philips Semiconductors is an octal D-type edge-triggered flip-flop with 3-State outputs, designed for bus-oriented microprocessor I/O port expansion and data latching in TTL-compatible systems. It features a 180 MHz maximum clock frequency, 5.0 ns typical propagation delay (CP to Qn), 50 mA typical total supply current at VCC = 5 V, and broadside 20-pin DIP packaging enabling clean PCB routing. It operates across 0°C to +70°C with 4.5–5.5 V supply voltage.

For engineers reviewing the N74F574N,602 datasheet, N74F574N,602 pinout, N74F574N,602 application, or N74F574N,602 equivalent, key selection considerations include its rising-edge clock trigger behavior, independent active-low Output Enable (OE), high-drive 3-State outputs (24 mA sink), glitch-free power-up output state, and compatibility with legacy 74F374-based designs requiring broadside layout optimization.

Technical Context

The N74F574N,602 implements eight fully edge-triggered D flip-flops synchronized on the Low-to-High transition of the CP input, with setup time of 2.5 ns and hold time of 0 ns at 25°C. Each flip-flop drives a dedicated 3-State output buffer controlled separately by the active-Low OE signal.

Its broadside pinout places all eight D inputs on one side (pins 2–9) and corresponding Q outputs on the opposite side (pins 12–19), minimizing trace crossovers when interfacing with 8-bit data buses. The device maintains high-impedance outputs during power-up/down transitions, preventing bus contention without external reset circuitry.

Key Specifications

Parameter	Value and Actual Design Meaning
Function	Octal D-type positive-edge-triggered flip-flop with 3-State outputs
f_MAX	180 MHz - supports high-speed synchronous data capture in fast microprocessor interfaces
t_PLH/t_PHL (CP→Q)	3.0–8.0 ns - ensures minimal clock-to-output latency for timing-critical control paths
I_OL	24 mA - drives heavily loaded TTL/CMOS buses without external buffers
V_CC Range	4.5–5.5 V - compatible with standard 5 V logic rails and tolerates ±10% supply variation
t_PZH/t_PZL (OE→Q)	2.0–8.5 ns - enables rapid bus arbitration and dynamic output enable/disable sequencing
Operating Temperature	0°C to +70°C - qualified for commercial-grade embedded and industrial control applications

Pinout & Package

Package: 20-pin plastic dual in-line package (DIP), 300 mil width, SOT146-1 footprint. Pin 10 = GND, Pin 20 = VCC.

Pin/Terminal	Circuit Role	Design Meaning
1	OE (Output Enable)	Active-Low global control for all eight 3-State outputs; enables/disables bus driving independently of clock or latch state
2–9	D0–D7 (Data Inputs)	Asynchronous data inputs sampled on Low-to-High CP edge; each has 1.0 FAST Unit Load loading
11	CP (Clock Pulse)	Rising-edge trigger for all eight flip-flops; requires minimum 3.0 ns pulse width high/low
12–19	Q0–Q7 (3-State Outputs)	Edge-triggered registered outputs; drive up to 24 mA low / 3 mA high; enter high-Z when OE = High
10	GND	Ground reference for all internal logic and output drivers
20	VCC	+5 V supply for core logic and output buffers; decoupling recommended per standard TTL practice

Key Features

Feature	Design Value
Broadside pinout (D0–D7 vs Q0–Q7 on opposite sides)	Reduces PCB trace congestion and simplifies 8-bit bus routing in microprocessor peripheral designs
Glitch-free 3-State outputs during power-up/down	Prevents bus contention at system startup or brownout without requiring external power-on reset coordination
Independent OE control	Allows dynamic bus sharing between multiple devices without affecting internal register state or clock timing
High-speed F-series performance	180 MHz f_MAX and sub-8 ns propagation delays support real-time I/O buffering in 16–20 MHz CPU systems
Standard 74F374 functional equivalence	Direct drop-in replacement for existing 74F374 designs, preserving logic behavior while improving layout efficiency

Applications

Microprocessor I/O Port Expansion	Bus Interface Latching
Use Scenario: Expanding address/data bus width in 8085/8088-based systems using parallel I/O ports. IC Role / Device Role / Timing Role: Acts as an 8-bit output latch for peripheral control registers, triggered by CPU write strobe synchronized to CP. Use Value: Enables deterministic write timing with 2.5 ns data setup and zero hold time, eliminating need for external timing glue logic.	Use Scenario: Isolating and latching data between two asynchronous buses (e.g., CPU bus ↔ peripheral bus). IC Role / Device Role / Timing Role: Provides bidirectional 3-State isolation with independent OE control, allowing safe bus turnaround without contention. Use Value: 24 mA sink capability and <8.5 ns output enable/disable times support reliable handshaking in multi-master bus architectures.
Industrial Control Register Storage	Legacy System Data Capture
Use Scenario: Holding setpoint or configuration data in PLC I/O modules where values must persist across scan cycles. IC Role / Device Role / Timing Role: Stores stable 8-bit control words synchronized to system clock; retains state until next CP edge. Use Value: Edge-triggered operation prevents metastability from noisy control signals, ensuring deterministic register updates.	Use Scenario: Capturing sensor or encoder data in vintage test equipment using TTL-level sampling clocks. IC Role / Device Role / Timing Role: Functions as a synchronous data sampler, transferring analog-to-digital converter outputs into CPU-accessible registers. Use Value: 180 MHz f_MAX allows oversampling up to 22.5 MSPS (8-bit) with margin, supporting high-resolution legacy instrumentation.

Microprocessor I/O Port Expansion

Bus Interface Latching

Use Scenario: Expanding address/data bus width in 8085/8088-based systems using parallel I/O ports.

IC Role / Device Role / Timing Role: Acts as an 8-bit output latch for peripheral control registers, triggered by CPU write strobe synchronized to CP.

Use Value: Enables deterministic write timing with 2.5 ns data setup and zero hold time, eliminating need for external timing glue logic.

Use Scenario: Isolating and latching data between two asynchronous buses (e.g., CPU bus ↔ peripheral bus).

IC Role / Device Role / Timing Role: Provides bidirectional 3-State isolation with independent OE control, allowing safe bus turnaround without contention.

Use Value: 24 mA sink capability and <8.5 ns output enable/disable times support reliable handshaking in multi-master bus architectures.

Industrial Control Register Storage

Legacy System Data Capture

Use Scenario: Holding setpoint or configuration data in PLC I/O modules where values must persist across scan cycles.

IC Role / Device Role / Timing Role: Stores stable 8-bit control words synchronized to system clock; retains state until next CP edge.

Use Value: Edge-triggered operation prevents metastability from noisy control signals, ensuring deterministic register updates.

Use Scenario: Capturing sensor or encoder data in vintage test equipment using TTL-level sampling clocks.

IC Role / Device Role / Timing Role: Functions as a synchronous data sampler, transferring analog-to-digital converter outputs into CPU-accessible registers.

Use Value: 180 MHz f_MAX allows oversampling up to 22.5 MSPS (8-bit) with margin, supporting high-resolution legacy instrumentation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal D flip-flop applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74F374N	Same function and pinout but non-broadside layout; 5.5 ns max t_PLH/t_PHL; identical AC/DC specs	Requires PCB redesign due to different D/Q pin arrangement; no change in logic or timing behavior	Select SN74F374N only when reusing legacy board layouts designed for narrow-side pinout
74ACT574PC	Advanced CMOS (ACT) family; 3.3 V tolerant inputs; 10 ns max t_PLH/t_PHL; lower ICC (20 mA typ)	Not 5 V TTL-compatible; requires level-shifting if interfacing with legacy 5 V buses	Choose 74ACT574PC for new low-power, mixed-voltage designs where 5 V tolerance is not required

Compared with SN74F374N and 74ACT574PC, the N74F574N,602 uniquely combines 5 V TTL compatibility, broadside layout advantage, and guaranteed glitch-free 3-State behavior during power transitions-making it optimal for retrofitting and maintaining legacy microprocessor systems without layout revision.

Availability

N74F574N,602 is available at Aetrix Electronics and suitable for microprocessor I/O port expansion, industrial control register storage, and legacy system data capture requiring stable component supply and long-term obsolescence management.

Supply support for N74F574N,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) was a leading European semiconductor manufacturer known for high-reliability logic families and automotive-grade ICs.

The 74F series was developed as a high-speed TTL-compatible logic family targeting microprocessor support functions-including latches, flip-flops, and bus transceivers-for industrial and computing applications in the 1980s.

FAQ

What is the clocking behavior of the N74F574N,602?

The N74F574N,602 is a positive-edge-triggered octal D flip-flop: data present at D0–D7 one setup time before the Low-to-High transition of the CP input is transferred to Q0–Q7. Its setup time is 2.5 ns (min) at 25°C, and hold time is 0 ns, enabling robust synchronization in high-frequency microprocessor write cycles. This behavior is confirmed in the FUNCTION TABLE – 74F574 section of the Philips specification.

Does the N74F574N,602 have built-in power-up protection for its outputs?

Yes, the N74F574N,602 guarantees glitch-free 3-State outputs during power-up and power-down transitions. Its outputs remain in high-impedance state until VCC stabilizes within operating range, preventing bus contention without external reset circuitry. This feature is explicitly documented under FEATURES and verified in the AC WAVEFORMS and APPLICATIONS sections of the Philips datasheet.

Can the N74F574N,602 be used as a direct replacement for the 74F374?

Yes, the N74F574N,602 is functionally identical to the 74F374 but uses a broadside pinout (D and Q pins on opposite sides of the package). It shares identical AC/DC electrical specifications, timing parameters, and logic behavior. No changes to firmware or timing constraints are needed-only PCB layout may require adaptation to accommodate the revised pin arrangement.

What is the maximum output drive capability of the N74F574N,602?

The N74F574N,602 provides 24 mA low-level output current (I_OL) and –3 mA high-level output current (I_OH) per Q pin, as specified in the DC ELECTRICAL CHARACTERISTICS table. This allows direct interfacing with standard TTL loads and heavily loaded 3-State buses without external drivers, supporting up to 150 FAST Unit Loads in the Low state.

Is the N74F574N,602 compatible with 3.3 V logic systems?

No, the N74F574N,602 is a 5 V TTL-family device with V_CC specified at 4.5–5.5 V and input thresholds (V_IL = 0.8 V, V_VIH = 2.0 V) optimized for 5 V operation. While it may accept 3.3 V logic-high inputs marginally, it is not guaranteed to operate reliably or meet timing specs in 3.3 V systems. Use 74ACT574 or level-shifting circuitry for true 3.3 V compatibility.

N74F574N,602 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: 74F

Package/Case:: 20-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

Function:: Standard

Type:: D-Type

Output Type:: Tri-State, Non-Inverted

Number of Elements:: 1

Number of Bits per Element:: 8

Clock Frequency:: 180 MHz

Max Propagation Delay @ V, Max CL:: 7.5ns @ 5V, 50pF

Trigger Type:: Positive Edge

Current - Output High, Low:: 3mA, 24mA

Voltage - Supply:: 4.5V ~ 5.5V

Current - Quiescent (Iq):: 65 mA

Input Capacitance:: -

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 20-DIP

N74F574N,602 FAQ

1.How can I place an order for N74F574N,602 through Aetrix?

Please submit a Request for Quotation (RFQ) for N74F574N,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 N74F574N,602 reliable?

The price and inventory of N74F574N,602 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for N74F574N,602 is usually 5 days.

3.What payment methods are accepted for N74F574N,602?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for N74F574N,602 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for N74F574N,602?

N74F574N,602 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your N74F574N,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 N74F574N,602?

For technical support, including N74F574N,602 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your N74F574N,602 requirements.

6.How does Aetrix verify that N74F574N,602 is sourced from the original manufacturer or authorized distributors?

All N74F574N,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 N74F574N,602 meets industry standards.

7.What is the process for return or replacement of N74F574N,602?

All N74F574N,602 units undergo pre-shipment inspection (PSI). If there is an issue with N74F574N,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 N74F574N,602 part is unused and in its original packaging.

Return procedure for N74F574N,602:

1.Submit a request within 90 days.

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

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