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 > Flip Flops

Texas Instruments SN74LV74APWRE4

Name: SN74LV74APWRE4
Brand: Texas Instruments
SKU: SN74LV74APWRE4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SN74LV74APWRE4

Manufacturer:: Texas Instruments

Category:: Flip Flops

Package:: 14-TSSOP (0.173", 4.40mm Width)

Datasheet:: SN74LV74APWRE4.pdf

Description:: IC FF D-TYPE DUAL 1BIT 14TSSOP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,229

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

Product details

Overview

SN74LV74APWRE4 from Texas Instruments is a dual positive-edge-triggered D-type flip-flop IC designed for 2-V to 5.5-V V_CC operation, supporting mixed-mode voltage translation across I/O ports. It delivers 8.5 ns maximum propagation delay at 5 V, features I_off partial-power-down protection, and operates across –40°C to 125°C for industrial programmable logic controller (PLC) and server motherboard timing control.

For engineers reviewing the SN74LV74APWRE4 datasheet, SN74LV74APWRE4 pinout, SN74LV74APWRE4 application, or SN74LV74APWRE4 equivalent, key selection criteria include its dual DFF architecture with independent preset/clear, 14-pin TSSOP package, 25 mA output drive capability, and guaranteed operation down to 2 V supply - critical for low-voltage interface synchronization and state-holding in mixed-supply systems.

Technical Context

This device implements two independent edge-triggered D flip-flops with asynchronous active-low preset (PRE) and clear (CLR) inputs. Each flip-flop transfers data from D to Q on the positive clock edge when PRE and CLR are high, while low assertion of either control forces Q/Q to defined logic states regardless of clock or data.

It supports mixed-voltage I/O: inputs tolerate up to 5.5 V independent of V_CC, enabling level translation from higher-voltage logic domains into 2.5 V or 3.3 V systems. The I_off circuitry disables outputs during power-down to prevent backflow current, satisfying JEDEC JESD78 latch-up requirements (>250 mA).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2 V to 5.5 V - enables interoperability across 2.5 V, 3.3 V, and 5 V logic domains without level shifters.
t_pd Max	8.5 ns at V_CC = 5 V - ensures sub-10 ns timing margin for high-speed synchronous logic in PLC I/O modules.
I_OL/I_OH	±12 mA at V_CC = 4.5–5.5 V - provides sufficient drive for fanout to multiple CMOS loads or light bus termination.
I_off	5 µA max at V_CC = 0 V - guarantees safe isolation during partial power-down in modular server PSU control circuits.
ESD Rating	2000 V HBM, 500 V CDM - meets industrial-grade robustness requirements for factory automation equipment.
Operating Temp	–40°C to +125°C - qualified for under-hood automotive-adjacent industrial environments and server motherboard edge zones.
Input Voltage Tolerance	0 V to 5.5 V on all inputs - allows direct interfacing with 5 V microcontrollers driving 3.3 V FPGA configuration logic.

Pinout & Package

TSSOP-14 (PW) package: 5.00 mm × 4.40 mm body, 0.65 mm pitch, exposed pad optional, RoHS-compliant NiPdAu lead finish, MSL Level-1.

Pin/Terminal	Circuit Role	Design Meaning
1, 13	1CLR / 2CLR	Asynchronous active-low clear for Flip-Flop 1 / 2 - forces Q = L, Q̅ = H independently of clock.
2, 12	1D / 2D	Data input for Flip-Flop 1 / 2 - sampled on rising CLK edge when PRE/CLR are inactive (high).
3, 11	1CLK / 2CLK	Positive-edge clock input for Flip-Flop 1 / 2 - triggers synchronous data transfer only on rising transition.
4, 10	1PRE / 2PRE	Asynchronous active-low preset for Flip-Flop 1 / 2 - forces Q = H, Q̅ = L independently of clock.
5, 9	1Q / 2Q	True output for Flip-Flop 1 / 2 - reflects stored D value after clock edge, unless overridden by PRE/CLR.
6, 8	1Q̅ / 2Q̅	Inverted output for Flip-Flop 1 / 2 - complementary to Q, maintained during PRE/CLR assertion.
7	GND	Ground reference for all internal circuitry and output drivers - must be low-impedance connection.
14	V_CC	Primary power supply - bypassed with 0.1 µF ceramic capacitor placed adjacent to pin per TI layout guidance.

Key Features

Feature	Design Value
Wide V_CC range (2–5.5 V)	Eliminates need for external level translators when interfacing 5 V sensors to 3.3 V microcontrollers in DCS analog input modules.
Asynchronous PRE/CLR	Enables deterministic initialization or fault recovery in safety-critical PLC sequencers without waiting for clock edges.
I_off protection	Prevents back-current damage during hot-swap or staggered power sequencing in modular server motherboards.
Low ground bounce (<0.8 V)	Maintains signal integrity on shared ground planes in dense AV receiver PCB layouts with concurrent switching outputs.
250 mA latch-up immunity	Ensures robust operation in industrial environments with ESD events or transient coupling on control lines.

Applications

Programmable Logic Controller (PLC)	Server Motherboard
Use Scenario: Synchronizing discrete I/O status updates between fieldbus controllers and local digital input registers. IC Role / Device Role / Timing Role: Dual DFF latches sensor states on rising edge of isolated clock, providing metastability-hardened sampling before CPU read. Use Value: 8.5 ns t_pd and –40°C to 125°C rating ensure deterministic timing in harsh factory-floor cabinets with thermal cycling.	Use Scenario: Managing reset sequencing and configuration handshaking between BMC and PCIe switch logic. IC Role / Device Role / Timing Role: Edge-triggered storage element holding boot mode bits or error flags across power domain boundaries. Use Value: I_off and 5.5 V-tolerant inputs allow safe operation during partial power-down of auxiliary rails without external isolation.
DCS Analog Input Module	AV Receiver
Use Scenario: Capturing calibrated ADC conversion results before multiplexing to system bus. IC Role / Device Role / Timing Role: Dual register holding simultaneous channel readings from sigma-delta converters, synchronized to master timing engine. Use Value: Mixed-voltage support enables direct interface to both 5 V precision references and 3.3 V digital core logic.	Use Scenario: Glitch-free routing of audio format select signals between DSP, HDMI controller, and amplifier stages. IC Role / Device Role / Timing Role: Synchronizer preventing race conditions when switching SPDIF sample rates or channel configurations. Use Value: Low ground bounce minimizes crosstalk-induced jitter on adjacent high-fidelity audio traces in compact chassis layouts.

Programmable Logic Controller (PLC)

Server Motherboard

Use Scenario: Synchronizing discrete I/O status updates between fieldbus controllers and local digital input registers.

IC Role / Device Role / Timing Role: Dual DFF latches sensor states on rising edge of isolated clock, providing metastability-hardened sampling before CPU read.

Use Value: 8.5 ns t_pd and –40°C to 125°C rating ensure deterministic timing in harsh factory-floor cabinets with thermal cycling.

Use Scenario: Managing reset sequencing and configuration handshaking between BMC and PCIe switch logic.

IC Role / Device Role / Timing Role: Edge-triggered storage element holding boot mode bits or error flags across power domain boundaries.

Use Value: I_off and 5.5 V-tolerant inputs allow safe operation during partial power-down of auxiliary rails without external isolation.

DCS Analog Input Module

AV Receiver

Use Scenario: Capturing calibrated ADC conversion results before multiplexing to system bus.

IC Role / Device Role / Timing Role: Dual register holding simultaneous channel readings from sigma-delta converters, synchronized to master timing engine.

Use Value: Mixed-voltage support enables direct interface to both 5 V precision references and 3.3 V digital core logic.

Use Scenario: Glitch-free routing of audio format select signals between DSP, HDMI controller, and amplifier stages.

IC Role / Device Role / Timing Role: Synchronizer preventing race conditions when switching SPDIF sample rates or channel configurations.

Use Value: Low ground bounce minimizes crosstalk-induced jitter on adjacent high-fidelity audio traces in compact chassis layouts.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC74APWR	Lower V_CC min (1.65 V), faster t_pd (6.7 ns @ 3.3 V), no 5.5 V input tolerance.	Better suited for battery-powered portable devices but incompatible with legacy 5 V logic interfaces.	Select when operating exclusively in 1.8 V/3.3 V systems and maximum speed is prioritized over voltage flexibility.
MC74LCX74DT	Higher I_OL/I_OH (±24 mA), wider temp range (–55°C to +125°C), no I_off support.	Preferred for military/aerospace where extended temperature and drive strength outweigh partial-power-down needs.	Choose for extreme-environment applications requiring higher output current and broader thermal qualification.

Compared with SN74LVC74APWR and MC74LCX74DT, SN74LV74APWRE4 uniquely balances 2–5.5 V operation, 5.5 V-tolerant inputs, and I_off protection - making it optimal for industrial mixed-supply systems where interoperability and safe power sequencing are non-negotiable.

Availability

SN74LV74APWRE4 is available at Aetrix Electronics and suitable for programmable logic controller (PLC), server motherboard, and DCS analog input module applications requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for SN74LV74APWRE4 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 and embedded processing technologies, with decades of expertise in logic, power management, and signal chain solutions.

The SN74LV74A product line delivers low-voltage, high-noise-immunity dual D-type flip-flops optimized for industrial automation, communications infrastructure, and computing platforms demanding robust timing control across wide supply ranges.

FAQ

What is the maximum clock frequency supported by SN74LV74APWRE4 at 3.3 V?

At V_CC = 3.3 V ± 0.3 V and CL = 15 pF, SN74LV74APWRE4 supports a maximum clock frequency (f_max) of 140 MHz under typical conditions. This value drops to 70 MHz at CL = 50 pF. These figures are specified across –40°C to +125°C and reflect guaranteed performance for synchronous state transitions in real-world industrial designs using SN74LV74APWRE4.

Does SN74LV74APWRE4 support 5 V logic inputs when powered from 3.3 V?

Yes, SN74LV74APWRE4 supports 5.5 V-tolerant inputs across all pins - meaning it accepts 0 V to 5.5 V logic levels regardless of V_CC setting. When powered from 3.3 V, this enables direct interfacing with legacy 5 V microcontrollers or sensors without external level-shifting circuitry, a key design advantage confirmed in the SN74LV74APWRE4 datasheet Section 6.3.

How does the I_off feature function in SN74LV74APWRE4 during power-down?

The I_off circuitry in SN74LV74APWRE4 automatically disables all outputs when V_CC is near 0 V, limiting leakage current to ≤5 µA. This prevents damaging back-current flow through the device when connected to live buses in partially powered systems - a critical requirement verified in SN74LV74APWRE4's electrical characteristics table (Section 6.4) and explicitly called out in its feature list.

What is the recommended bypass capacitor for SN74LV74APWRE4?

Texas Instruments recommends a 0.1-µF ceramic capacitor placed as close as possible to the V_CC pin (Pin 14) of SN74LV74APWRE4 to suppress high-frequency noise and stabilize supply rail during output switching. For multi-rail systems, additional 0.01–0.022 µF capacitors may be used per power terminal, as documented in SN74LV74APWRE4 Application Report SCLS381M Section 10.

Can SN74LV74APWRE4 replace SN74LV74APWR in existing designs?

Yes - SN74LV74APWRE4 is a drop-in replacement for SN74LV74APWR, sharing identical TSSOP-14 (PW) package dimensions, pinout, electrical specifications, and thermal characteristics. The "E4" suffix denotes TI's standard green packaging and tape-and-reel configuration, with no functional or timing differences from the base SN74LV74APWR part number.

SN74LV74APWRE4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LV

Package/Case:: 14-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Function:: Set(Preset) and Reset

Type:: D-Type

Output Type:: Complementary

Number of Elements:: 2

Number of Bits per Element:: 1

Clock Frequency:: 140 MHz

Max Propagation Delay @ V, Max CL:: 9.3ns @ 5V, 50pF

Trigger Type:: Positive Edge

Current - Output High, Low:: 12mA, 12mA

Voltage - Supply:: 2V ~ 5.5V

Current - Quiescent (Iq):: 20 µA

Input Capacitance:: 2 pF

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-TSSOP

SN74LV74APWRE4 FAQ

1.How can I place an order for SN74LV74APWRE4 through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LV74APWRE4 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 SN74LV74APWRE4 reliable?

The price and inventory of SN74LV74APWRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV74APWRE4 is usually 5 days.

3.What payment methods are accepted for SN74LV74APWRE4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV74APWRE4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74LV74APWRE4?

SN74LV74APWRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LV74APWRE4 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 SN74LV74APWRE4?

For technical support, including SN74LV74APWRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV74APWRE4 requirements.

6.How does Aetrix verify that SN74LV74APWRE4 is sourced from the original manufacturer or authorized distributors?

All SN74LV74APWRE4 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 SN74LV74APWRE4 meets industry standards.

7.What is the process for return or replacement of SN74LV74APWRE4?

All SN74LV74APWRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV74APWRE4, 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 SN74LV74APWRE4 part is unused and in its original packaging.

Return procedure for SN74LV74APWRE4:

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…