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

Texas Instruments SN74ABT574ANE4

Name: SN74ABT574ANE4
Brand: Texas Instruments
SKU: SN74ABT574ANE4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74ABT574ANE4

Manufacturer:: Texas Instruments

Category:: Flip Flops

Package:: -

Datasheet:: SN74ABT574ANE4.pdf

Description:: SN74ABT574A OCTAL EDGE-TRIGGERED

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Product details

Overview

SN74ABT574ANE4 from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs in a 20-pin PDIP package, operating at 4.5–5.5 V, supporting 150 MHz clock frequency, −32 mA/64 mA high-drive outputs, and Ioff partial-power-down capability. It serves as a bidirectional bus driver or I/O port register in industrial control backplanes and legacy data acquisition systems.

For engineers reviewing the SN74ABT574ANE4 datasheet, SN74ABT574ANE4 pinout, SN74ABT574ANE4 application, or SN74ABT574ANE4 equivalent, key selection criteria include its 3-state output enable timing (tPZL = 2.5 ns typ), ground-bounce immunity (<1 V VOLP), latch-up robustness (>500 mA), and compatibility with 5-V TTL/CMOS bus interfaces requiring high fan-out and hot-swap support.

Technical Context

This device implements eight independent positive-edge-triggered D flip-flops with synchronous data capture on CLK↑ and asynchronous 3-state control via OE. Each Q output retains its state when OE is high, and enters high-impedance when OE is low-without affecting internal storage.

It features Ioff circuitry enabling safe partial-power-down operation, ESD protection exceeding 2000-V HBM and 200-V MM, and rail-to-rail input tolerance (−0.5 V to 7 V). The design targets high-noise industrial environments where bus contention, ground bounce, and power sequencing must be managed without external components.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Function	Octal D-type flip-flop with 3-state outputs - enables time-synchronized latching and bus isolation in shared-data-path systems.
Supply Voltage	4.5 V to 5.5 V - compatible with standard 5-V TTL logic rails and tolerant of supply ripple up to ±0.5 V.
Output Drive	−32 mA IOH / 64 mA IOL - drives heavy capacitive loads (e.g., >50 pF traces) without external buffers or pull-ups.
Max Clock Frequency	150 MHz - supports high-speed parallel data transfer in legacy microprocessor peripheral interfaces.
Ioff Current	±100 μA max at VCC = 0 - prevents backflow current during power-down, enabling live insertion in modular backplane systems.
Propagation Delay	tPLH/tPHL ≤ 6.8 ns (CLK→Q) - ensures tight setup/hold timing margins for synchronous 150-MHz operation.
Enable Timing	tPZL ≤ 5.9 ns, tPHZ ≤ 6.2 ns (OE→Q) - guarantees fast bus release and acquisition for dynamic bus arbitration.

Pinout & Package

SN74ABT574ANE4 uses a 20-pin plastic dual in-line package (PDIP-N), 0.300″ wide, with standard through-hole mounting and JEDEC MS-001 compliant footprint. Pin 1 is located at the top-left corner with notch orientation marking.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 6, 7, 8	Data inputs (1D–8D)	Asynchronous D inputs for each flip-flop; sampled on rising CLK edge.
9	GND	Power ground reference for all logic and output stages.
10	VCC	Positive supply (4.5–5.5 V); powers internal logic and output drivers.
11, 12, 13, 14, 15, 16, 17, 18	Outputs (1Q–8Q)	3-state buffered outputs; driven high/low when OE = L, high-Z when OE = H.
19	CLK	Global positive-edge clock input; triggers simultaneous latching of all eight D inputs.
20	OE	Active-low output enable; controls 3-state behavior independently of clock or data state.

Key Features

Feature	Design Value
High-Drive Outputs	−32 mA source / 64 mA sink capability eliminates need for external bus transceivers in high-capacitance backplane designs.
Ioff Partial-Power-Down	Enables safe insertion/removal while system is powered; prevents damaging current flow when VCC = 0 but bus signals remain active.
Low Ground Bounce	VOLP < 1 V at 5 V/25°C ensures signal integrity during simultaneous output switching in dense PCB layouts.
Latch-Up Immunity	Exceeds 500 mA per JESD17 - critical for reliability in industrial environments with EFT and surge exposure.
ESD Robustness	2000-V HBM and 200-V MM rating reduces risk of handling damage and field failures in unshielded assembly lines.

Applications

Industrial Backplane Interface	Legacy Microprocessor I/O Expansion
Use Scenario: Isolating and latching address/data bus signals between a main controller and modular I/O cards in PLC chassis. IC Role / Device Role / Timing Role: Acts as a synchronized 8-bit buffer register with 3-state outputs to prevent bus contention during card hot-swap. Use Value: Eliminates need for discrete pull-up resistors and bus arbitration logic while maintaining 150-MHz timing compliance.	Use Scenario: Extending parallel I/O ports for Z80 or 8086-based embedded controllers in test equipment. IC Role / Device Role / Timing Role: Provides edge-triggered data capture and tri-state bus driving for memory-mapped peripheral registers. Use Value: Enables direct connection to 5-V TTL buses with no level-shifting, leveraging −32 mA/64 mA drive for long trace runs.
Test Equipment Data Capture	Digital Signal Acquisition Buffer
Use Scenario: Capturing parallel sensor outputs (e.g., 8-channel ADC results) synchronized to a master clock in automated test systems. IC Role / Device Role / Timing Role: Functions as a clocked sample-and-hold register, freezing analog-to-digital conversion results for readout. Use Value: Guarantees deterministic sampling edge (CLK↑) and glitch-free hold via internal D-flip-flop architecture.	Use Scenario: Buffering digital waveform data from high-speed logic analyzers before storage in FIFO or SRAM. IC Role / Device Role / Timing Role: Serves as a transient bus interface that isolates acquisition logic from host processor data transfers. Use Value: High-impedance state during host reads prevents signal corruption; Ioff protects against backfeed during power cycling.

Industrial Backplane Interface

Legacy Microprocessor I/O Expansion

Use Scenario: Isolating and latching address/data bus signals between a main controller and modular I/O cards in PLC chassis.

IC Role / Device Role / Timing Role: Acts as a synchronized 8-bit buffer register with 3-state outputs to prevent bus contention during card hot-swap.

Use Value: Eliminates need for discrete pull-up resistors and bus arbitration logic while maintaining 150-MHz timing compliance.

Use Scenario: Extending parallel I/O ports for Z80 or 8086-based embedded controllers in test equipment.

IC Role / Device Role / Timing Role: Provides edge-triggered data capture and tri-state bus driving for memory-mapped peripheral registers.

Use Value: Enables direct connection to 5-V TTL buses with no level-shifting, leveraging −32 mA/64 mA drive for long trace runs.

Test Equipment Data Capture

Digital Signal Acquisition Buffer

Use Scenario: Capturing parallel sensor outputs (e.g., 8-channel ADC results) synchronized to a master clock in automated test systems.

IC Role / Device Role / Timing Role: Functions as a clocked sample-and-hold register, freezing analog-to-digital conversion results for readout.

Use Value: Guarantees deterministic sampling edge (CLK↑) and glitch-free hold via internal D-flip-flop architecture.

Use Scenario: Buffering digital waveform data from high-speed logic analyzers before storage in FIFO or SRAM.

IC Role / Device Role / Timing Role: Serves as a transient bus interface that isolates acquisition logic from host processor data transfers.

Use Value: High-impedance state during host reads prevents signal corruption; Ioff protects against backfeed during power cycling.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal D-type flip-flop with 3-state output applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74ABT574ADW	SOIC-20 package (DW), same electrical specs, 58°C/W θJA vs. N-package's 69°C/W.	Better thermal performance in surface-mount, space-constrained PCBs; not suitable for through-hole prototyping.	Select when board real estate is limited and reflow assembly is used; verify pad layout per DW drawing MO-118.
SN74ABT574APWR	TSSOP-20 package (PW), same logic and timing, 83°C/W θJA, smaller footprint (4.4 × 6.5 mm).	Higher thermal resistance requires careful power derating above 70°C ambient; ideal for compact consumer-grade modules.	Choose for miniaturized designs where volume production justifies TSSOP reflow process control; avoid in high-ambient industrial enclosures.

Compared with SN74ABT574ADW and SN74ABT574APWR, SN74ABT574ANE4 offers mechanical robustness and hand-soldering compatibility via PDIP, lower thermal resistance than TSSOP, and proven reliability in legacy repair and field-service scenarios-making it optimal for maintenance, prototyping, and low-volume industrial builds.

Availability

SN74ABT574ANE4 is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy microprocessor I/O expansion, and test equipment data capture requiring stable component supply, long-term obsolescence management, and through-hole assembly compatibility.

Supply support for SN74ABT574ANE4 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

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and logic solutions with emphasis on reliability, longevity, and industrial-grade qualification.

The SN74ABT574A family was designed for robust 5-V bus interfacing in harsh environments-targeting programmable logic controllers, instrumentation, and military/aerospace subsystems requiring latch-up immunity, ESD resilience, and partial-power-down safety.

FAQ

What is the maximum clock frequency supported by SN74ABT574ANE4?

The SN74ABT574ANE4 supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 5 V, TA = 25°C). This value is guaranteed across the full commercial temperature range (−40°C to 85°C), with typical propagation delays (tPLH/tPHL) of 2.2–6.8 ns ensuring timing margin for synchronous bus protocols.

Does SN74ABT574ANE4 support partial-power-down operation?

Yes, SN74ABT574ANE4 incorporates Ioff circuitry that disables outputs when VCC = 0, limiting Ioff to ±100 μA maximum. This feature prevents damaging current backflow during hot-insertion or staged power sequencing-critical for modular backplane systems where SN74ABT574ANE4 may be powered down while bus lines remain active.

What is the output drive strength of SN74ABT574ANE4?

SN74ABT574ANE4 delivers −32 mA high-level output current (IOH) and 64 mA low-level output current (IOL) at VCC = 5 V. This high-drive capability allows direct driving of heavily loaded 5-V TTL/CMOS buses (e.g., >50 pF traces or multiple gate inputs) without external buffers or pull-up resistors.

How does the OE pin function on SN74ABT574ANE4?

The OE (output enable) pin on SN74ABT574ANE4 is active-low and asynchronous: when OE = L, outputs reflect current Q states; when OE = H, all eight outputs enter high-impedance mode regardless of CLK or D input activity. OE does not affect internal flip-flop operation-data can be latched or retained while outputs are disabled.

Is SN74ABT574ANE4 pin-compatible with other packages in the SN74ABT574A family?

Yes, SN74ABT574ANE4 shares identical pinout and logic functionality with all SN74ABT574A variants-including SOIC (DW), SSOP (DB), TSSOP (PW), and VFBGA (GQN/ZQN)-as confirmed by TI's SCBS191F datasheet. All packages use the same 20-pin assignment: pins 1–8 = D inputs, 11–18 = Q outputs, 19 = CLK, 20 = OE, 9 = GND, 10 = VCC.

SN74ABT574ANE4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Function:: -

Type:: -

Output Type:: -

Number of Elements:: -

Number of Bits per Element:: -

Clock Frequency:: -

Max Propagation Delay @ V, Max CL:: -

Trigger Type:: -

Current - Output High, Low:: -

Voltage - Supply:: -

Current - Quiescent (Iq):: -

Input Capacitance:: -

Operating Temperature:: -

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SN74ABT574ANE4 FAQ

1.How can I place an order for SN74ABT574ANE4 through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74ABT574ANE4 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 SN74ABT574ANE4 reliable?

The price and inventory of SN74ABT574ANE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT574ANE4 is usually 5 days.

3.What payment methods are accepted for SN74ABT574ANE4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT574ANE4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74ABT574ANE4?

SN74ABT574ANE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74ABT574ANE4 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 SN74ABT574ANE4?

For technical support, including SN74ABT574ANE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT574ANE4 requirements.

6.How does Aetrix verify that SN74ABT574ANE4 is sourced from the original manufacturer or authorized distributors?

All SN74ABT574ANE4 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 SN74ABT574ANE4 meets industry standards.

7.What is the process for return or replacement of SN74ABT574ANE4?

All SN74ABT574ANE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT574ANE4, 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 SN74ABT574ANE4 part is unused and in its original packaging.

Return procedure for SN74ABT574ANE4:

1.Submit a request within 90 days.

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

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