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Texas Instruments SN74LVTH374IPWREP

Name: SN74LVTH374IPWREP
Brand: Texas Instruments
SKU: SN74LVTH374IPWREP
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LVTH374IPWREP

Manufacturer:: Texas Instruments

Category:: Flip Flops

Package:: 20-TSSOP (0.173", 4.40mm Width)

Datasheet:: SN74LVTH374IPWREP.pdf

Description:: IC FF D-TYPE SNGL 8BIT 20TSSOP

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Product details

Overview

SN74LVTH374IPWREP from Texas Instruments is an octal edge-triggered D-type flip-flop designed for 3.3-V V_CC operation with 5-V tolerant inputs and outputs, supporting mixed-mode signal interfacing between 3.3-V logic and legacy 5-V systems. It features bus-hold circuitry on all data inputs, I_off and power-up 3-state for hot insertion, and operates across −40°C to 85°C. Used in backplane transceivers, memory address latching, and industrial control bus interfaces.

For engineers reviewing the SN74LVTH374IPWREP datasheet, SN74LVTH374IPWREP pinout, SN74LVTH374IPWREP application, or SN74LVTH374IPWREP equivalent, key selection criteria include 3.3-V supply compatibility with 5-V I/O tolerance, guaranteed 150-MHz clock frequency, bus-hold input retention, and TSSOP-20 packaging for high-density PCB layouts.

Technical Context

This device implements eight independent D-type latches triggered on the rising edge of CLK, with asynchronous output-enable (OE) control that places outputs in high-impedance without affecting internal state retention. The bus-hold circuitry actively maintains valid logic levels on undriven D inputs, eliminating external pull resistors.

It incorporates I_off protection to block current backflow during power-down and power-up 3-state logic that forces outputs into high-Z when V_CC is below 1.5 V - both critical for live-insertion in modular systems. Absolute maximum ratings support 4.6-V V_CC, 7-V input/output voltage tolerance, and latch-up immunity >500 mA per JESD 17.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.7 V to 3.6 V - supports unregulated battery operation down to 2.7 V with stable timing and logic integrity.
Input Voltage Tolerance	−0.5 V to 7 V - enables direct interface to 5-V TTL buses without level-shifting components.
Max Clock Frequency	150 MHz - ensures reliable high-speed data capture in synchronous bus architectures.
t_su/t_h	1.5 ns setup / 0.8 ns hold - tight timing margins reduce timing closure risk in dense PCB routing.
I_OL/I_OH	64 mA sink / −32 mA source - drives heavy capacitive loads (e.g., 50-pF traces + multiple inputs) without signal degradation.
Bus-Hold Current	±750 µA at V_CC = 3.6 V - actively holds floating D inputs at valid logic states, removing need for external biasing.
Power-Up 3-State Threshold	Active below 1.5 V V_CC - prevents bus contention during power ramp-up/down sequences.

Pinout & Package

TSSOP-20 (PW) package: 6.5 mm × 4.4 mm × 1.2 mm body, 0.65 mm pitch, lead-free NiPdAu finish, MSL Level-1.

Pin/Terminal	Circuit Role	Design Meaning
1	OE	Active-low output enable - disables all Q outputs to high-impedance independently of CLK or D state.
2–9, 11–18	D1–D8, Q1–Q8	Eight bidirectional data paths - D inputs accept 5-V signals; Q outputs drive 3.3-V or 5-V loads with bus-hold on D only.
10	GND	Ground reference - must be connected before V_CC during hot insertion to ensure I_off activation.
19	V_CC	3.3-V supply input - powers internal logic and output drivers; tolerates 2.7–3.6 V range.
20	CLK	Positive-edge clock - triggers simultaneous latching of all eight D inputs to corresponding Q outputs.

Key Features

Feature	Design Value
Mixed-mode I/O	3.3-V core logic with 5-V tolerant inputs/outputs enables seamless integration into hybrid-voltage systems without translators.
Bus-Hold Circuitry	Eliminates external pullup/pulldown resistors on D inputs, reducing BOM count and PCB area while preventing floating-input metastability.
Hot-Insertion Support	I_off and power-up 3-state prevent damaging current flow and bus conflicts during live board replacement in telecom or server backplanes.
High-Drive Outputs	64-mA sink capability allows direct driving of multiple CMOS/TTL loads or long traces without buffer amplification.
Latch-Up Immunity	Exceeds 500 mA per JESD 17 - ensures robust operation in electrically noisy industrial environments with transient coupling.

Applications

Industrial Backplane Interface	Memory Address Latching
Use Scenario: Isolating and synchronizing address/data signals between a 3.3-V FPGA controller and legacy 5-V peripheral cards in modular PLC racks. IC Role / Device Role / Timing Role: Octal D-flip-flop acting as a voltage-tolerant, edge-aligned data latch for parallel bus handshaking. Use Value: Enables direct 5-V ↔ 3.3-V interoperation without level shifters, while bus-hold prevents glitches during card hot-swap transitions.	Use Scenario: Capturing and holding microprocessor address bus signals for static RAM or EPROM access in embedded instrumentation. IC Role / Device Role / Timing Role: Synchronous address register providing glitch-free, clock-aligned output staging for memory decode logic. Use Value: 150-MHz max clock and sub-5-ns propagation delay ensure reliable address setup/hold timing even at high CPU frequencies.
Telecom Line Card Buffering	Automated Test Equipment (ATE) Signal Conditioning
Use Scenario: Driving high-capacitance backplane traces in carrier-grade line cards where signal integrity and hot-swap reliability are critical. IC Role / Device Role / Timing Role: High-drive, hot-pluggable bus interface IC managing bidirectional control signal distribution. Use Value: 64-mA output drive and 7-pF output capacitance minimize rise/fall time degradation over 10-cm FR4 traces.	Use Scenario: Latching test pattern vectors from a 3.3-V pattern generator to drive 5-V DUT pins in semiconductor ATE systems. IC Role / Device Role / Timing Role: Precision timing interface element ensuring deterministic vector launch relative to system clock edge. Use Value: 1.5-ns setup time and 0.8-ns hold time allow tight timing correlation between pattern generator and DUT response sampling.

Industrial Backplane Interface

Memory Address Latching

Use Scenario: Isolating and synchronizing address/data signals between a 3.3-V FPGA controller and legacy 5-V peripheral cards in modular PLC racks.

IC Role / Device Role / Timing Role: Octal D-flip-flop acting as a voltage-tolerant, edge-aligned data latch for parallel bus handshaking.

Use Value: Enables direct 5-V ↔ 3.3-V interoperation without level shifters, while bus-hold prevents glitches during card hot-swap transitions.

Use Scenario: Capturing and holding microprocessor address bus signals for static RAM or EPROM access in embedded instrumentation.

IC Role / Device Role / Timing Role: Synchronous address register providing glitch-free, clock-aligned output staging for memory decode logic.

Use Value: 150-MHz max clock and sub-5-ns propagation delay ensure reliable address setup/hold timing even at high CPU frequencies.

Telecom Line Card Buffering

Automated Test Equipment (ATE) Signal Conditioning

Use Scenario: Driving high-capacitance backplane traces in carrier-grade line cards where signal integrity and hot-swap reliability are critical.

IC Role / Device Role / Timing Role: High-drive, hot-pluggable bus interface IC managing bidirectional control signal distribution.

Use Value: 64-mA output drive and 7-pF output capacitance minimize rise/fall time degradation over 10-cm FR4 traces.

Use Scenario: Latching test pattern vectors from a 3.3-V pattern generator to drive 5-V DUT pins in semiconductor ATE systems.

IC Role / Device Role / Timing Role: Precision timing interface element ensuring deterministic vector launch relative to system clock edge.

Use Value: 1.5-ns setup time and 0.8-ns hold time allow tight timing correlation between pattern generator and DUT response sampling.

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
SN74LVT374PWRE	No bus-hold circuitry; requires external pull resistors on unused D inputs.	Suitable for fixed-configuration systems where all inputs are actively driven; not recommended for hot-swap or floating-bus scenarios.	Choose when cost reduction is prioritized and bus-hold functionality is unnecessary.
SN74LVCH16374ADGGR	16-bit, dual-rail (1.65–3.6 V), no 5-V tolerance; higher pin count (48-pin TSSOP).	Designed for low-voltage, high-density memory interfaces; incompatible with 5-V signal domains.	Choose only for pure 3.3-V or lower systems requiring double the channel count and wider V_CC flexibility.

Compared with SN74LVTH374IPWREP, SN74LVT374PWRE lacks bus-hold and hot-insertion support, limiting use in dynamic systems; SN74LVCH16374ADGGR offers more bits but sacrifices 5-V compatibility and increases layout complexity - making SN74LVTH374IPWREP optimal for mixed-voltage, space-constrained, field-replaceable designs.

Availability

SN74LVTH374IPWREP is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory address latching, and telecom line card buffering requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LVTH374IPWREP 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 connectivity technologies, with decades of heritage in high-reliability logic and interface solutions.

The SN74LVTH374IPWREP belongs to TI's enhanced-product (EP) logic family, engineered for extended temperature operation (−40°C to 85°C), DMS support, and qualification to JEDEC standards - targeting aerospace, defense, and industrial systems where longevity and supply assurance are critical.

FAQ

What is the operating temperature range for SN74LVTH374IPWREP?

The SN74LVTH374IPWREP is rated for continuous operation from −40°C to +85°C ambient temperature. This extended range is validated per JEDEC qualification standards including temperature cycling and biased 85/85 testing, making it suitable for industrial and automotive under-hood applications where thermal stability is essential. The SN74LVTH374IPWREP maintains full electrical performance across this entire range without derating.

Does SN74LVTH374IPWREP support hot insertion, and how is it implemented?

Yes, SN74LVTH374IPWREP supports hot insertion via two integrated features: I_off circuitry disables outputs when V_CC = 0 V to prevent back-current flow, and power-up 3-state forces outputs into high-impedance during V_CC ramp-up below 1.5 V. These functions are intrinsic to the SN74LVTH374IPWREP silicon design and require no external components - enabling safe live replacement in telecom and server backplane systems.

Can SN74LVTH374IPWREP interface directly with 5-V logic without level shifters?

Yes, SN74LVTH374IPWREP accepts 5-V input signals (VI up to 7 V) and drives 5-V loads (VO up to 7 V in high-Z, V_CC + 0.5 V in active state) while operating from a 3.3-V supply. Its input structure is TTL-compatible and its outputs swing rail-to-rail within 3.3-V constraints - allowing direct connection to 5-V buses without external translation. This capability is explicitly specified in the SN74LVTH374IPWREP datasheet absolute maximum and recommended operating conditions tables.

What is the purpose of bus-hold circuitry on SN74LVTH374IPWREP data inputs?

The bus-hold circuitry on SN74LVTH374IPWREP D inputs actively maintains the last-valid logic state when inputs are floating or undriven, eliminating the need for external pullup or pulldown resistors. It draws ±750 µA at V_CC = 3.6 V to override noise-induced transitions - a feature confirmed in the SN74LVTH374IPWREP electrical characteristics table. This reduces BOM cost, saves PCB space, and improves reliability in systems with intermittent signal sources.

What package type and moisture sensitivity level does SN74LVTH374IPWREP use?

SN74LVTH374IPWREP uses a 20-pin TSSOP (PW) package with 0.65-mm pitch, NiPdAu lead finish, and Moisture Sensitivity Level (MSL) 1 - meaning unlimited floor life at ≤30°C/60% RH and peak reflow temperature of 260°C. This MSL rating is documented in TI's official Packaging Information addendum for SN74LVTH374IPWREP and confirms suitability for standard surface-mount assembly without dry-pack requirements.

SN74LVTH374IPWREP Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVTH

Package/Case:: 20-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Standard

Type:: D-Type

Output Type:: Tri-State, Non-Inverted

Number of Elements:: 1

Number of Bits per Element:: 8

Clock Frequency:: 150 MHz

Max Propagation Delay @ V, Max CL:: 4.5ns @ 3.3V, 50pF

Trigger Type:: Positive Edge

Current - Output High, Low:: 32mA, 64mA

Voltage - Supply:: 2.7V ~ 3.6V

Current - Quiescent (Iq):: 190 µA

Input Capacitance:: 3 pF

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-TSSOP

SN74LVTH374IPWREP FAQ

1.How can I place an order for SN74LVTH374IPWREP through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVTH374IPWREP 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 SN74LVTH374IPWREP reliable?

The price and inventory of SN74LVTH374IPWREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTH374IPWREP is usually 5 days.

3.What payment methods are accepted for SN74LVTH374IPWREP?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVTH374IPWREP transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74LVTH374IPWREP?

SN74LVTH374IPWREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LVTH374IPWREP 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 SN74LVTH374IPWREP?

For technical support, including SN74LVTH374IPWREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTH374IPWREP requirements.

6.How does Aetrix verify that SN74LVTH374IPWREP is sourced from the original manufacturer or authorized distributors?

All SN74LVTH374IPWREP 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 SN74LVTH374IPWREP meets industry standards.

7.What is the process for return or replacement of SN74LVTH374IPWREP?

All SN74LVTH374IPWREP units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH374IPWREP, 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 SN74LVTH374IPWREP part is unused and in its original packaging.

Return procedure for SN74LVTH374IPWREP:

1.Submit a request within 90 days.

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

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