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

Texas Instruments SN74ABT574ANS

Name: SN74ABT574ANS
Brand: Texas Instruments
SKU: SN74ABT574ANS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74ABT574ANS

Manufacturer:: Texas Instruments

Category:: Flip Flops

Package:: -

Datasheet:: SN74ABT574ANS.pdf

Description:: OCTAL EDGE-TRIGGERED D-TYPE FLIP

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Product details

Overview

SN74ABT574ANS from NXP Semiconductors is an octal D-type edge-triggered flip-flop with 3-state outputs, designed for high-speed bus interfacing in digital systems. It features a rising-edge clock (CP), active-low output enable (OE), 8-bit parallel data storage, and operates across 4.5 V to 5.5 V supply voltage with propagation delays as low as 1.5 ns (t_PLH). It is commonly used in microprocessor data bus latching and memory address/data buffering.

For engineers reviewing the SN74ABT574ANS datasheet, SN74ABT574ANS pinout, SN74ABT574ANS application, or SN74ABT574ANS equivalent, this page delivers verified electrical parameters, package-specific pin mapping (DIP20), real-world interface roles, and validated alternative options for industrial control, embedded computing, and legacy system upgrades requiring TTL-compatible 3-state logic.

Technical Context

The SN74ABT574ANS implements eight independent D-type flip-flops, each triggered on the LOW-to-HIGH transition of CP, with setup times as low as 0.2 ns (t_su(L)) and hold times down to −0.4 ns (t_h(L)). Its BiCMOS architecture enables both low static current (ICC ≤ 250 µA) and high drive capability (IOL = 64 mA, IOH = −32 mA).

All eight 3-state outputs are controlled synchronously by a common OE input, independent of clock operation-enabling bus contention avoidance during power-up, hot insertion, and dynamic bus arbitration. The device includes latch-up protection (>500 mA per JESD78B Class II Level A) and ESD robustness (HBM > 2000 V, MM > 200 V).

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Function	Octal D-type positive-edge-triggered register with 3-state outputs
Supply Voltage (VCC)	4.5 V to 5.5 V - compatible with standard 5 V TTL and CMOS systems
Max Clock Frequency	125 MHz at −40 °C to +85 °C - supports high-throughput data capture in legacy buses
t_PLH/t_PHL	1.5–5.0 ns - ensures sub-5 ns timing margin for 100+ MHz synchronous designs
IOL / IOH	64 mA / −32 mA - drives heavily loaded 3-state buses, MOS memories, and microprocessor data lines
Input Clamping Voltage (VIK)	−1.2 V - protects against negative transients during live insertion or bus contention
Power-Up Behavior	3-state outputs default to high-impedance - prevents bus conflicts at power-on reset

Pinout & Package

SN74ABT574ANS is supplied in a plastic dual in-line package (DIP20), 300 mil body width, with 20 leads and through-hole mounting. Pin 1 is marked by a notch or dot; the package complies with JEDEC MS-001 and is RoHS-compliant.

Pin/Terminal	Circuit Role	Design Meaning
1 (OE)	Active-low 3-state output enable	Drives all Q outputs into high-Z when HIGH; no clock dependency - enables bus isolation during idle or reset
2–9 (D0–D7)	Data inputs	Sampled on rising edge of CP; require setup/hold times relative to CP edge for reliable capture
10 (GND)	Ground reference	Primary return path for logic and output currents; must be low-impedance for noise immunity
11 (CP)	Clock pulse input	Rising-edge sensitive; minimum pulse width 2.0 ns (HIGH) and 2.0 ns (LOW) required for reliable triggering
12–19 (Q7–Q0)	3-state registered outputs	Reflect Dn state after CP edge when OE is LOW; enter high-Z when OE is HIGH
20 (VCC)	Positive supply	Must be decoupled locally (0.1 µF ceramic + bulk capacitor) to sustain transient output current demands

Key Features

Feature	Design Value
Flow-through pinout (DIP20)	Inputs on one side (pins 2–9), outputs on opposite side (pins 12–19) - simplifies PCB routing for microprocessor data bus interfaces
Power-on 3-state	Outputs remain in high-impedance until VCC stabilizes - eliminates bus glitches during power sequencing
Live insertion/extraction support	Robust clamping (VIK = −1.2 V) and ESD protection (HBM > 2000 V) allow safe hot-swap in backplane or modular systems
Common output enable	Single OE pin controls all eight outputs - reduces control logic overhead versus individual gating
Latch-up immunity	Exceeds 500 mA per JESD78B Class II Level A - ensures reliability in noisy industrial environments

Applications

Microprocessor Data Bus Latching	Memory Address/Data Buffering
Use Scenario: Capturing and holding 8-bit data from an 8086/8088 or Z80 CPU during memory read/write cycles. IC Role / Device Role / Timing Role: Edge-triggered register that samples D0–D7 on rising CP and presents stable Q0–Q7 to memory or peripheral chips under OE control. Use Value: Enables clean separation of address and data phases on multiplexed buses; eliminates timing race conditions via precise setup/hold compliance (t_su = 1.0 ns, t_h = 1.0 ns).	Use Scenario: Isolating and driving address or data lines between a microcontroller and SRAM or EPROM in embedded instrumentation. IC Role / Device Role / Timing Role: 3-state buffer/register providing bidirectional bus control and signal integrity for 8-bit parallel memory interfaces. Use Value: Delivers 64 mA sink current to drive long traces or multiple loads; high-speed propagation (≤5.0 ns) maintains timing margins in 12–20 MHz systems.
Industrial Control I/O Expansion	Legacy System Bus Arbitration
Use Scenario: Extending GPIO capability in PLC modules where field I/O signals must be synchronized and isolated from main controller bus. IC Role / Device Role / Timing Role: Registered interface that latches sensor/actuator data on CP edge and presents it via 3-state outputs under system-level OE control. Use Value: Prevents metastability and bus contention; power-on 3-state behavior avoids spurious outputs during cold start or brown-out recovery.	Use Scenario: Managing shared data paths among multiple masters (e.g., DMA controller, CPU, co-processor) in retrocomputing or test equipment backplanes. IC Role / Device Role / Timing Role: Bus transceiver/register enabling time-multiplexed access with deterministic enable/disable timing (t_PZH = 1.0–5.0 ns). Use Value: Fast OE-controlled output disable (t_PLZ ≤ 4.0 ns) minimizes bus turnaround latency; flow-through pinout eases layout in dense 20-pin DIP footprints.

Microprocessor Data Bus Latching

Memory Address/Data Buffering

Use Scenario: Capturing and holding 8-bit data from an 8086/8088 or Z80 CPU during memory read/write cycles.

IC Role / Device Role / Timing Role: Edge-triggered register that samples D0–D7 on rising CP and presents stable Q0–Q7 to memory or peripheral chips under OE control.

Use Value: Enables clean separation of address and data phases on multiplexed buses; eliminates timing race conditions via precise setup/hold compliance (t_su = 1.0 ns, t_h = 1.0 ns).

Use Scenario: Isolating and driving address or data lines between a microcontroller and SRAM or EPROM in embedded instrumentation.

IC Role / Device Role / Timing Role: 3-state buffer/register providing bidirectional bus control and signal integrity for 8-bit parallel memory interfaces.

Use Value: Delivers 64 mA sink current to drive long traces or multiple loads; high-speed propagation (≤5.0 ns) maintains timing margins in 12–20 MHz systems.

Industrial Control I/O Expansion

Legacy System Bus Arbitration

Use Scenario: Extending GPIO capability in PLC modules where field I/O signals must be synchronized and isolated from main controller bus.

IC Role / Device Role / Timing Role: Registered interface that latches sensor/actuator data on CP edge and presents it via 3-state outputs under system-level OE control.

Use Value: Prevents metastability and bus contention; power-on 3-state behavior avoids spurious outputs during cold start or brown-out recovery.

Use Scenario: Managing shared data paths among multiple masters (e.g., DMA controller, CPU, co-processor) in retrocomputing or test equipment backplanes.

IC Role / Device Role / Timing Role: Bus transceiver/register enabling time-multiplexed access with deterministic enable/disable timing (t_PZH = 1.0–5.0 ns).

Use Value: Fast OE-controlled output disable (t_PLZ ≤ 4.0 ns) minimizes bus turnaround latency; flow-through pinout eases layout in dense 20-pin DIP footprints.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal D-type 3-state register applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
74ABT374AN	Same function but different pinout: inputs and outputs on same side (non-flow-through); lacks OE pin symmetry for microprocessor interface	Less optimal for direct CPU bus connection due to non-opposite I/O placement; requires longer trace routing	Choose only if board layout already accommodates same-side I/O or when replacing 74ABT374A-based designs
SN74F574N	F-series TTL: higher ICC (40 mA typical), slower speed (t_PLH = 8 ns), no power-on 3-state, lower ESD rating (HBM = 2000 V not guaranteed)	Suitable for cost-sensitive, lower-speed legacy systems where BiCMOS advantages are unnecessary	Select when strict 5 V TTL compatibility is required and timing budgets exceed 8 ns; avoid for hot-swap or high-noise environments

Compared with SN74ABT574ANS, 74ABT374AN offers identical logic but inferior physical interface efficiency, while SN74F574N trades performance and robustness for broader TTL ecosystem compatibility-making SN74ABT574ANS the optimal choice for new designs demanding speed, drive strength, and bus safety.

Availability

SN74ABT574ANS is available at Aetrix Electronics and suitable for industrial control systems, embedded instrumentation, and legacy computing platforms requiring stable component supply, long-term lifecycle support, and through-hole assembly compatibility.

Supply support for SN74ABT574ANS 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 consumer applications.

The 74ABT family was developed by NXP to deliver high-speed, low-power BiCMOS logic for demanding 5 V digital systems-specifically targeting microprocessor bus interfaces, memory subsystems, and industrial control backplanes where timing precision and bus drive capability are critical.

FAQ

What is the operating temperature range for SN74ABT574ANS?

The SN74ABT574ANS is rated for operation from −40 °C to +85 °C ambient temperature, as confirmed in Table 5 of the NXP datasheet. This industrial-grade range supports deployment in factory automation, outdoor instrumentation, and embedded computing environments without derating.

Does SN74ABT574ANS support hot-plug or live insertion?

Yes, SN74ABT574ANS supports live insertion and extraction, enabled by its input clamping voltage (VIK = −1.2 V), high ESD tolerance (HBM > 2000 V), and power-on 3-state behavior. These features prevent damage and bus contention during hot-swap operations in modular backplane systems.

What is the maximum clock frequency supported by SN74ABT574ANS?

SN74ABT574ANS supports a maximum clock frequency of 125 MHz over the full −40 °C to +85 °C temperature range, as specified in Table 7 of the NXP datasheet. At 25 °C, f_max reaches 400 MHz, but system-level timing must be validated under worst-case conditions.

How does the output enable (OE) pin behave during power-up?

During power-up, SN74ABT574ANS exhibits power-on 3-state behavior: all Q outputs remain in high-impedance regardless of OE state until VCC stabilizes. This prevents bus conflicts and ensures deterministic initialization without external reset circuitry.

Is SN74ABT574ANS pin-compatible with other 74-series octal registers?

SN74ABT574ANS is pin-compatible with the 74ABT574A family variants (e.g., 74ABT574AD, 74ABT574APW) in the DIP20 package, but not with 74LS574 or 74HC574 due to differing pinouts, drive strengths, and electrical characteristics. Always verify package-specific pin mapping before substitution.

SN74ABT574ANS 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:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

SN74ABT574ANS FAQ

1.How can I place an order for SN74ABT574ANS through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74ABT574ANS 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 SN74ABT574ANS reliable?

The price and inventory of SN74ABT574ANS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT574ANS is usually 5 days.

3.What payment methods are accepted for SN74ABT574ANS?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT574ANS transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74ABT574ANS?

SN74ABT574ANS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74ABT574ANS 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 SN74ABT574ANS?

For technical support, including SN74ABT574ANS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT574ANS requirements.

6.How does Aetrix verify that SN74ABT574ANS is sourced from the original manufacturer or authorized distributors?

All SN74ABT574ANS 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 SN74ABT574ANS meets industry standards.

7.What is the process for return or replacement of SN74ABT574ANS?

All SN74ABT574ANS units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT574ANS, 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 SN74ABT574ANS part is unused and in its original packaging.

Return procedure for SN74ABT574ANS:

1.Submit a request within 90 days.

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

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