Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Texas Instruments SN74LV574DWR

Name: SN74LV574DWR
Brand: Texas Instruments
SKU: SN74LV574DWR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SN74LV574DWR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: -

Datasheet:: SN74LV574DWR.pdf

Description:: BUS DRIVER

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,000

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SN74LV574DWR from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for 2.7-V to 5.5-V V_CC operation. It features 20-pin SOIC (DW) package, 50 MHz max clock frequency at 5 V, 12 ns typical propagation delay (CLK to Q), and ±16 mA output drive capability. It serves as a bidirectional bus driver or I/O port buffer in digital logic systems.

For engineers reviewing the SN74LV574DWR datasheet, SN74LV574DWR pinout, SN74LV574DWR application, or SN74LV574DWR equivalent, key selection criteria include its 3-state output control via OE, low-voltage compatibility down to 2.7 V, ground bounce < 0.8 V, and latch-up immunity exceeding 250 mA per JEDEC JESD-17.

Technical Context

This device implements eight independent D-type latches triggered on the positive edge of CLK, with synchronous data capture and asynchronous 3-state output control via OE. Its EPIC™ (Enhanced-Performance Implanted CMOS) 2-µm process enables robust noise immunity and rail-to-rail output swing across the full 2.7–5.5 V supply range.

The SN74LV574DWR supports high-capacitance bus driving without external pull-ups due to strong ±16 mA drive strength at 5 V and fast enable/disable times (11 ns t_en, 14 ns t_dis). Input thresholds are voltage-ratio-based: VIH = 3.15 V (at VCC = 4.5–5.5 V) and VIL = 1.65 V, ensuring TTL- and CMOS-compatible interfacing.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.7 V to 5.5 V - Enables interoperability with both 3.3 V and 5 V logic domains without level shifters.
Max Clock Frequency	50 MHz at V_CC = 5 V - Supports high-speed data latching in microcontroller peripheral interfaces and memory buffers.
t_pd (CLK→Q)	12 ns typical at V_CC = 5 V - Ensures tight timing margins in synchronous bus architectures with ≤20 ns cycle times.
I_OL/I_OH	±16 mA at V_CC = 5 V - Drives 50-pF loads directly, eliminating need for external bus transceivers in medium-speed parallel interfaces.
t_su/t_h	5 ns setup / 4 ns hold at V_CC = 5 V - Compatible with standard microprocessor address/data strobe timing windows.
ESD Protection	>2000 V HBM, >200 V MM - Meets industrial-grade reliability requirements without additional protection circuitry.
Latch-Up Immunity	>250 mA per JEDEC JESD-17 - Prevents destructive latch-up during transient overvoltage events on I/O lines.

Pinout & Package

SN74LV574DWR uses a 20-pin SOIC (DW) package with 7.5 mm × 12.8 mm body size and 1.27 mm lead pitch. Pin 1 is marked by a beveled corner or notch; the package is RoHS-compliant and rated for −40°C to +85°C operation.

Pin/Terminal	Circuit Role	Design Meaning
1	OE (Output Enable)	Active-low 3-state control: drives outputs high-Z when high; no effect on internal latch state.
2–9	D1–D8 (Data Inputs)	Asynchronous data inputs sampled on rising CLK edge; TTL/CMOS compatible thresholds.
10	GND	Power ground reference for all logic and output stages.
11–18	Q1–Q8 (Outputs)	Edge-triggered registered outputs with 3-state capability; drive ±16 mA at 5 V.
19	V_CC	Positive supply (2.7–5.5 V); powers internal logic and output drivers.
20	CLK	Positive-edge-triggered clock input; accepts fast transitions (≤100 ns/V slew rate).

Key Features

Feature	Design Value
3-State Outputs with Independent OE	Enables shared-bus arbitration without external tri-state logic or direction control signals.
Low-Voltage Operation (2.7 V min)	Supports mixed-supply systems with 3.3 V microcontrollers while maintaining full 5 V tolerance on I/O.
High Noise Immunity	VOLP < 0.8 V and VOHV > 2 V minimize false triggering from ground bounce or supply undershoot.
EPIC™ Process Technology	Delivers latch-up immunity >250 mA and ESD robustness >2 kV HBM for industrial environments.
SOIC DW Package Footprint	Standard 20-pin SOIC layout compatible with legacy PCB designs and automated assembly processes.

Applications

Industrial PLC I/O Expansion	Microcontroller Parallel Bus Interface
Use Scenario: Expanding GPIO count on a programmable logic controller mainboard using a parallel backplane. IC Role / Device Role / Timing Role: Acts as an octal latch and bus driver, capturing status inputs and driving output modules synchronously to system clock. Use Value: Eliminates need for discrete buffers or level shifters due to 2.7–5.5 V operation and ±16 mA drive into 50-pF loads.	Use Scenario: Interfacing an 8-bit microcontroller (e.g., MSP430 or PIC18) to external SRAM or LCD controller via multiplexed address/data bus. IC Role / Device Role / Timing Role: Functions as a data register and bus isolator, latching write data on CLK rise and enabling read data onto bus via OE. Use Value: Provides precise 5 ns setup/4 ns hold timing and 12 ns propagation delay, meeting tight microcontroller bus timing budgets.
Legacy ISA Bus Peripheral Adapter	Digital Test Equipment Signal Conditioning
Use Scenario: Building a PC/104-compatible interface card that maps ISA bus signals to modern FPGA-based logic. IC Role / Device Role / Timing Role: Serves as bidirectional bus transceiver and address latch, isolating FPGA core from noisy ISA bus transients. Use Value: High ESD rating (>2 kV HBM) and latch-up immunity (>250 mA) protect FPGA I/O against bus fault conditions.	Use Scenario: Conditioning digital stimulus signals in automated test equipment before routing to DUT pins. IC Role / Device Role / Timing Role: Provides clean, edge-aligned signal registration and controlled bus drive strength for repeatable test vector timing. Use Value: Ground bounce <0.8 V ensures stable logic levels during simultaneous switching of multiple outputs under load.

Industrial PLC I/O Expansion

Microcontroller Parallel Bus Interface

Use Scenario: Expanding GPIO count on a programmable logic controller mainboard using a parallel backplane.

IC Role / Device Role / Timing Role: Acts as an octal latch and bus driver, capturing status inputs and driving output modules synchronously to system clock.

Use Value: Eliminates need for discrete buffers or level shifters due to 2.7–5.5 V operation and ±16 mA drive into 50-pF loads.

Use Scenario: Interfacing an 8-bit microcontroller (e.g., MSP430 or PIC18) to external SRAM or LCD controller via multiplexed address/data bus.

IC Role / Device Role / Timing Role: Functions as a data register and bus isolator, latching write data on CLK rise and enabling read data onto bus via OE.

Use Value: Provides precise 5 ns setup/4 ns hold timing and 12 ns propagation delay, meeting tight microcontroller bus timing budgets.

Legacy ISA Bus Peripheral Adapter

Digital Test Equipment Signal Conditioning

Use Scenario: Building a PC/104-compatible interface card that maps ISA bus signals to modern FPGA-based logic.

IC Role / Device Role / Timing Role: Serves as bidirectional bus transceiver and address latch, isolating FPGA core from noisy ISA bus transients.

Use Value: High ESD rating (>2 kV HBM) and latch-up immunity (>250 mA) protect FPGA I/O against bus fault conditions.

Use Scenario: Conditioning digital stimulus signals in automated test equipment before routing to DUT pins.

IC Role / Device Role / Timing Role: Provides clean, edge-aligned signal registration and controlled bus drive strength for repeatable test vector timing.

Use Value: Ground bounce <0.8 V ensures stable logic levels during simultaneous switching of multiple outputs under load.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC574APW	Lower V_CC range (1.65–3.6 V); 3.3 V only; 24 mA drive; TSSOP-20 package.	Better suited for pure 3.3 V systems requiring higher drive; not 5 V tolerant.	Select when operating exclusively at 3.3 V and needing stronger output current.
74ACT574SC	5 V only (4.5–5.5 V); faster t_pd (6.5 ns); higher ICC; SOIC-20 package.	Optimized for legacy 5 V TTL systems demanding maximum speed and fanout.	Select for 5 V-only designs where propagation delay is critical and power budget allows.

Compared with SN74LV574DWR, SN74LVC574APW offers higher drive but narrower voltage range, while 74ACT574SC delivers lower latency at the cost of 5 V exclusivity and higher static current - making SN74LV574DWR the optimal choice for dual-voltage (2.7–5.5 V) industrial bus buffering where robustness and flexibility are prioritized.

Availability

SN74LV574DWR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, microcontroller parallel bus interface, and legacy ISA bus peripheral adapter applications requiring stable component supply and long-term design continuity.

Supply support for SN74LV574DWR 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, with decades of experience in high-reliability industrial and automotive ICs.

The SN74LV574DWR belongs to TI's LV family of low-voltage logic devices, engineered for interoperability across mixed-supply digital systems and robust operation in electrically noisy industrial environments.

FAQ

What is the operating temperature range for SN74LV574DWR?

The SN74LV574DWR is characterized for operation from −40°C to +85°C, making it suitable for industrial environments including factory automation controllers and outdoor instrumentation. This range is confirmed in the recommended operating conditions table of the SCLS199B datasheet, and applies specifically to the DW-package variant including SN74LV574DWR.

Does SN74LV574DWR support 5 V logic levels on its inputs when powered at 3.3 V?

Yes, SN74LV574DWR supports 5 V-tolerant inputs when V_CC = 3.3 V: its VIH threshold is 2.0 V (min) at V_CC = 2.7–3.6 V, and absolute maximum input voltage is V_CC + 0.5 V - allowing safe interfacing with 5 V outputs without external level translation. This is explicitly stated in the "Recommended Operating Conditions" and "Absolute Maximum Ratings" sections of the SCLS199B datasheet.

Can SN74LV574DWR drive a 50-pF capacitive load at 50 MHz?

SN74LV574DWR supports 50 MHz clock operation at V_CC = 5 V with CL = 50 pF, as verified in the "Switching Characteristics" table of SCLS199B. Its t_pd = 12 ns (typical) and t_dis/t_en < 20 ns ensure reliable timing closure in high-speed bus applications - though sustained 50 MHz toggling requires attention to power dissipation (Cpd = 44 pF per flip-flop at 5 V).

Is SN74LV574DWR pin-compatible with standard 74LS574 or 74HC574 devices?

No - SN74LV574DWR shares the same 20-pin SOIC (DW) footprint and pinout as other '574-family devices (including 74LS574 and 74HC574), but differs electrically: it has LV-CMOS input thresholds, higher drive strength, and wider V_CC range. While mechanical replacement is possible, direct substitution requires verification of voltage compatibility and timing margins in the target system.

What is the purpose of the OE pin on SN74LV574DWR, and how does it interact with the internal latches?

The OE (Output Enable) pin on SN74LV574DWR is an active-low control that places Q1–Q8 outputs in high-impedance state without affecting internal latch operation. Data can be updated or retained while OE is asserted high; this allows non-intrusive bus sharing and eliminates bus contention. The SCLS199B datasheet explicitly states "OE does not affect the internal operations of the flip-flops", confirming independent control of output state versus stored data.

SN74LV574DWR 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:: -

SN74LV574DWR FAQ

1.How can I place an order for SN74LV574DWR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LV574DWR 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 SN74LV574DWR reliable?

The price and inventory of SN74LV574DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV574DWR is usually 5 days.

3.What payment methods are accepted for SN74LV574DWR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV574DWR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74LV574DWR?

SN74LV574DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LV574DWR 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 SN74LV574DWR?

For technical support, including SN74LV574DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV574DWR requirements.

6.How does Aetrix verify that SN74LV574DWR is sourced from the original manufacturer or authorized distributors?

All SN74LV574DWR 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 SN74LV574DWR meets industry standards.

7.What is the process for return or replacement of SN74LV574DWR?

All SN74LV574DWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV574DWR, 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 SN74LV574DWR part is unused and in its original packaging.

Return procedure for SN74LV574DWR:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…