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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Texas Instruments SN74LV574ANS

Name: SN74LV574ANS
Brand: Texas Instruments
SKU: SN74LV574ANS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LV574ANS

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: -

Datasheet:: SN74LV574ANS.pdf

Description:: BUS DRIVER

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Product details

Overview

SN74LV574ANS from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for 2-V to 5.5-V V_CC operation. It features 10 ns max propagation delay at 5 V, I_off support for partial-power-down mode, and latch-up performance exceeding 250 mA per JESD 17 - used in bidirectional bus drivers and I/O port buffering in industrial control systems.

For engineers reviewing the SN74LV574ANS datasheet, SN74LV574ANS pinout, SN74LV574ANS application, or SN74LV574ANS equivalent, key selection criteria include its 20-pin SO (NS) package, 3-state output enable control, mixed-mode voltage operation across ports, and compatibility with 3.3-V/5-V logic interfaces in data acquisition subsystems.

Technical Context

The SN74LV574ANS implements eight independent D-type latches triggered on the positive clock edge, with synchronous data capture and asynchronous 3-state output control via OE. Its I_off circuitry actively disables outputs during power-down, preventing backflow current when V_CC = 0 V.

It supports mixed-mode signaling: inputs tolerate voltages up to 5.5 V regardless of V_CC, enabling interfacing between 3.3-V logic and 5-V buses. Output drive strength is ±16 mA at 5 V, with guaranteed VOH ≥ 3.8 V and VOL ≤ 0.55 V under full load.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2 V to 5.5 V - enables single-supply operation across 3.3-V and 5-V systems without level shifters.
Max t_pd	10 ns at 5 V - ensures sub-100-MHz timing margin for high-speed bus latching in microcontroller peripherals.
I_off	5 μA max - guarantees safe isolation during partial power-down, critical for hot-swap and low-power standby modes.
Output Drive	±16 mA at V_CC = 4.5–5.5 V - drives standard TTL loads and 50-pF PCB traces without external buffers.
t_su/t_h	3.5 ns / 1.5 ns at 5 V - defines minimal data setup/hold window before CLK↑, easing timing closure in FPGA-to-ASIC glue logic.
ESD Rating	2000-V HBM - meets industrial IEC 61000-4-2 system-level robustness requirements without added protection circuitry.
Operating Temp	−40°C to +85°C - qualified for extended temperature range in automotive body control modules and factory automation PLCs.

Pinout & Package

SN74LV574ANS uses a 20-pin SO (Small Outline) package per JEDEC MS-012, with 0.300-inch body width and 0.050-inch lead pitch. Pin 1 is located at top-left corner with beveled edge marking.

Pin/Terminal	Circuit Role	Design Meaning
1	OE (Output Enable)	Active-low control: asserts high-impedance state on all Q outputs when high; does not affect internal latch state.
2–9	1D–8D	Data inputs for each of eight D-type flip-flops; sampled on rising CLK edge.
10	GND	Ground reference for all internal logic and output drivers.
11	V_CC	Power supply input (2–5.5 V); powers both core logic and output buffers.
12–19	1Q–8Q	Tri-stateable buffered outputs; reflect D-input values after CLK↑ when OE is low.
20	CLK	Clock input with Schmitt-triggered threshold; triggers simultaneous latching of all eight D inputs on rising edge.

Key Features

Feature	Design Value
Mixed-mode voltage operation	Inputs accept 0–5.5 V regardless of V_CC, enabling direct interface between 3.3-V FPGAs and 5-V legacy peripherals.
I_off protection	Prevents damaging current flow when V_CC = 0 V, allowing safe insertion/removal in powered-backplane systems.
Low ground bounce (V_OLP)	<0.8 V at 3.3 V - minimizes noise coupling into shared ground planes in dense digital layouts.
High noise immunity	V_IL(D) = 0.99 V and V_IH(D) = 2.31 V at 3.3 V - provides >0.6-V noise margin against EMI in motor-drive environments.
Thermal performance	θ_JA = 60°C/W (NS package) - supports continuous operation at 85°C ambient without forced airflow in enclosed enclosures.

Applications

Industrial I/O Expansion	Microcontroller Bus Interface
Use Scenario: Adding parallel GPIO to a PLC CPU board with limited native I/O pins. IC Role / Device Role / Timing Role: Acts as an octal latch buffer, capturing sensor status bits from an 8-bit parallel bus on CLK↑ and holding stable outputs until next update. Use Value: Eliminates need for discrete pull-ups and reduces MCU firmware overhead by offloading input sampling to hardware edge-triggered logic.	Use Scenario: Isolating an ARM Cortex-M4's 16-bit data bus from a legacy 8-bit peripheral during read/write cycles. IC Role / Device Role / Timing Role: Provides direction-controlled 3-state buffering: OE synchronized to bus control signals to prevent contention during data transfer. Use Value: Enables clean bus sharing without arbitration logic, supporting burst transfers at up to 100 MHz with verified t_pd < 10 ns.
Digital Test Equipment	Automotive Body Control
Use Scenario: Capturing real-time waveform samples from a 8-channel ADC in automated test fixtures. IC Role / Device Role / Timing Role: Latches parallel ADC output bits on precise CLK edges, then presents stable data to FPGA for processing while next sample is acquired. Use Value: Achieves deterministic sampling jitter < 1.5 ns (t_h), meeting Class B test equipment repeatability requirements.	Use Scenario: Driving LED clusters and relay coils in vehicle door modules using a 3.3-V MCU with insufficient drive capability. IC Role / Device Role / Timing Role: Buffers MCU GPIOs to deliver ±16 mA per channel, with OE tied to MCU reset to ensure safe high-Z state at power-on. Use Value: Meets AEC-Q100 Grade 2 thermal and ESD requirements without external protection components.

Industrial I/O Expansion

Microcontroller Bus Interface

Use Scenario: Adding parallel GPIO to a PLC CPU board with limited native I/O pins.

IC Role / Device Role / Timing Role: Acts as an octal latch buffer, capturing sensor status bits from an 8-bit parallel bus on CLK↑ and holding stable outputs until next update.

Use Value: Eliminates need for discrete pull-ups and reduces MCU firmware overhead by offloading input sampling to hardware edge-triggered logic.

Use Scenario: Isolating an ARM Cortex-M4's 16-bit data bus from a legacy 8-bit peripheral during read/write cycles.

IC Role / Device Role / Timing Role: Provides direction-controlled 3-state buffering: OE synchronized to bus control signals to prevent contention during data transfer.

Use Value: Enables clean bus sharing without arbitration logic, supporting burst transfers at up to 100 MHz with verified t_pd < 10 ns.

Digital Test Equipment

Automotive Body Control

Use Scenario: Capturing real-time waveform samples from a 8-channel ADC in automated test fixtures.

IC Role / Device Role / Timing Role: Latches parallel ADC output bits on precise CLK edges, then presents stable data to FPGA for processing while next sample is acquired.

Use Value: Achieves deterministic sampling jitter < 1.5 ns (t_h), meeting Class B test equipment repeatability requirements.

Use Scenario: Driving LED clusters and relay coils in vehicle door modules using a 3.3-V MCU with insufficient drive capability.

IC Role / Device Role / Timing Role: Buffers MCU GPIOs to deliver ±16 mA per channel, with OE tied to MCU reset to ensure safe high-Z state at power-on.

Use Value: Meets AEC-Q100 Grade 2 thermal and ESD requirements without external protection components.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC574APW	Lower V_CC min (1.65 V), higher speed (t_pd = 6.5 ns @ 3.3 V), but no I_off support.	Not suitable for partial-power-down systems; requires external pull-ups on OE for safe power sequencing.	Choose for higher-speed 3.3-V-only designs where power sequencing is controlled externally.
74ACT574SC	Higher drive (±24 mA), TTL-compatible inputs, but V_CC limited to 4.5–5.5 V only.	Cannot interface with 3.3-V logic without level translation; lacks mixed-voltage tolerance.	Choose only for legacy 5-V-only systems requiring stronger drive and TTL input thresholds.

Compared with SN74LVC574APW and 74ACT574SC, the SN74LV574ANS uniquely combines wide V_CC range (2–5.5 V), I_off protection, and industrial temperature rating - making it the sole option for mixed-voltage, hot-pluggable, and extended-temp embedded control applications.

Availability

SN74LV574ANS is available at Aetrix Electronics and suitable for industrial I/O expansion, microcontroller bus interfacing, and automotive body control applications requiring stable component supply across long production lifecycles.

Supply support for SN74LV574ANS 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 specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.

The SN74LV574A family was engineered for robust, low-power data latching in mixed-voltage systems - targeting industrial PLCs, test equipment, and automotive ECUs where reliability, wide supply range, and power-down safety are mandatory.

FAQ

What is the maximum clock frequency supported by SN74LV574ANS at 3.3 V?

The SN74LV574ANS supports up to 145 MHz maximum operating frequency (f_max) at V_CC = 3.3 V with 15-pF load, as specified in the switching characteristics table. This value assumes proper signal integrity, controlled impedance routing, and decoupling - actual system-level frequency may be limited by board layout and load capacitance.

Does SN74LV574ANS require external pull-up resistors on the OE pin?

Yes - to ensure outputs remain in high-impedance state during power-up or brownout, OE should be tied to V_CC via a pull-up resistor. The minimum resistance depends on the driver's sink capability; TI recommends ≥10 kΩ for typical microcontroller GPIOs driving OE directly.

Can SN74LV574ANS operate with V_CC = 2.5 V while interfacing with 5-V logic inputs?

Yes - the SN74LV574ANS supports mixed-mode voltage operation: inputs tolerate 0–5.5 V regardless of V_CC. At V_CC = 2.5 V, VIH is 1.75 V and VIL is 0.75 V, providing valid logic recognition of 5-V signals without level translation.

What is the thermal resistance θ_JA of the SN74LV574ANS NS package?

The SN74LV574ANS in the SO (NS) package has a junction-to-ambient thermal resistance (θ_JA) of 60°C/W, measured per JESD 51-7 on a standard 2-layer JEDEC test board. This value enables reliable operation at 85°C ambient with typical power dissipation below 150 mW.

Is SN74LV574ANS pin-compatible with other packages in the SN74LV574A family?

Yes - all SN74LV574A variants (DB, DGV, DW, NS, PW, RGY) share identical 20-pin functional pinout and logic behavior. The SN74LV574ANS uses the NS package, which is mechanically compatible with SOIC footprints but has slightly different lead form; PCB layout must match NS-specific dimensions.

SN74LV574ANS Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Logic Type:: -

Number of Elements:: -

Number of Bits per Element:: -

Input Type:: -

Output Type:: -

Current - Output High, Low:: -

Voltage - Supply:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

SN74LV574ANS FAQ

1.How can I place an order for SN74LV574ANS through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LV574ANS 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 SN74LV574ANS reliable?

The price and inventory of SN74LV574ANS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV574ANS is usually 5 days.

3.What payment methods are accepted for SN74LV574ANS?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV574ANS transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74LV574ANS?

SN74LV574ANS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LV574ANS 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 SN74LV574ANS?

For technical support, including SN74LV574ANS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV574ANS requirements.

6.How does Aetrix verify that SN74LV574ANS is sourced from the original manufacturer or authorized distributors?

All SN74LV574ANS 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 SN74LV574ANS meets industry standards.

7.What is the process for return or replacement of SN74LV574ANS?

All SN74LV574ANS units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV574ANS, 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 SN74LV574ANS part is unused and in its original packaging.

Return procedure for SN74LV574ANS:

1.Submit a request within 90 days.

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

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