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 SN74LVTH125PWRE4

Name: SN74LVTH125PWRE4
Brand: Texas Instruments
SKU: SN74LVTH125PWRE4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SN74LVTH125PWRE4

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: SN74LVTH125PWRE4.pdf

Description:: IC BUF NON-INVERT 3.6V 14TSSOP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,986

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

Product details

Overview

SN74LVTH125PWRE4 from Texas Instruments is a quad 3-state noninverting buffer designed for mixed-voltage system interfacing, supporting 5-V TTL inputs/outputs with 3.3-V V_CC, operating down to 2.7 V, and featuring bus-hold on all data inputs. It delivers 64 mA sink current per output, <0.8 V typical output ground bounce at 3.3 V, and supports hot insertion via I_off and power-up 3-state logic. It is used in backplane interface circuits between legacy 5-V logic and modern 3.3-V FPGA or ASIC I/O banks.

For engineers reviewing the SN74LVTH125PWRE4 datasheet, SN74LVTH125PWRE4 pinout, SN74LVTH125PWRE4 application, or SN74LVTH125PWRE4 equivalent, key selection considerations include its 3.3-V supply compatibility with 5-V tolerant inputs, bus-hold elimination of external pull resistors, hot-plug capability, low ground bounce performance, and TSSOP-14 packaging for space-constrained board layouts.

Technical Context

This device implements four independent noninverting buffers, each with an active-low 3-state output-enable (OE) input controlling high-impedance output states. The bus-hold circuitry actively maintains valid logic levels on undriven inputs without external components, and the I_off protection disables outputs during power-down to prevent backflow current.

It operates across −40°C to +85°C with V_CC from 2.7 V to 3.6 V, meets JESD 17 latch-up >500 mA, and exceeds JESD 22 ESD ratings (2000-V HBM, 200-V MM). Propagation delays are specified at 1–4.9 ns (t_PLH/t_PHL) and enable/disable times at 1.1–5.9 ns (t_PZL/t_PHZ) under 50-pF load conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.7 V to 3.6 V - Enables stable operation from unregulated batteries or noisy 3.3-V rails.
I_OL / I_OH	64 mA sink / 32 mA source - Drives heavy capacitive loads or multiple CMOS/TTL inputs directly.
t_PLH/t_PHL	1.0–4.9 ns @ 3.3 V - Supports high-speed data routing in 50-MHz+ digital buses.
V_IH/V_IL	2.0 V / 0.8 V - Accepts standard 5-V TTL logic thresholds while powered from 3.3 V.
V_OHP / V_OLP	<0.8 V typical ground bounce - Minimizes noise coupling into shared V_CC/GND planes.
Bus-Hold Current	±500 µA max - Maintains stable logic state on floating inputs without external resistors.
I_off	±100 µA @ V_CC = 0 V - Blocks current flow during hot insertion or partial power-down.

Pinout & Package

TSSOP-14 package (PW), 5.0 mm × 4.4 mm body, 0.65 mm pitch, exposed pad optional, RoHS-compliant, moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
1, 4, 10, 13	Output Enable (OE)	Active-low control per buffer; high = high-Z output, low = enabled noninverting pass-through.
2, 5, 11, 14	Data Input (A)	Noninverting input for corresponding buffer; includes integrated bus-hold circuitry.
3, 6, 12, 9	Output (Y)	3-state noninverting output; driven high/low when OE low, high-impedance when OE high.
7	GND	Ground reference for all internal logic and output drivers.
14	V_CC	3.3-V supply input; powers all buffers and bus-hold circuitry; supports operation down to 2.7 V.

Key Features

Feature	Design Value
Mixed-mode voltage interface	5-V tolerant inputs/outputs with 3.3-V V_CC - Eliminates level-shifter ICs in 3.3/5-V boundary applications.
Integrated bus-hold	Active input retention without external pullup/pulldown resistors - Reduces BOM count and PCB area.
Hot-insertion support	I_off and power-up 3-state - Prevents backdrive damage and bus contention during live card replacement.
Low ground bounce	<0.8 V typical V_OLP at 3.3 V - Limits simultaneous switching noise in dense multi-buffer layouts.
Latch-up immunity	>500 mA per JESD 17 - Ensures robustness in industrial environments with transient overcurrent events.

Applications

Industrial Backplane Interface	Embedded FPGA I/O Expansion
Use Scenario: Interfacing legacy 5-V peripheral modules (e.g., RS-232 transceivers, optocouplers) to a 3.3-V FPGA-based controller on a modular PLC backplane. IC Role / Device Role / Timing Role: Level-translating buffer isolating voltage domains while preserving signal integrity and timing margins. Use Value: Eliminates discrete level shifters and pull resistors, reducing interconnect delay by ≤2 ns versus resistor-based solutions and enabling direct connection to 5-V TTL peripherals.	Use Scenario: Expanding I/O count of a Xilinx Artix-7 FPGA by driving additional GPIO headers, where some pins must interface with 5-V sensors or actuators. IC Role / Device Role / Timing Role: Noninverting 3-state buffer providing bidirectional signal conditioning and voltage translation on shared data buses. Use Value: Bus-hold prevents floating inputs during reconfiguration; 64 mA drive strength ensures reliable fanout to multiple 5-V CMOS loads without signal degradation.
Hot-Swappable Module Control	Automotive Body Control Unit
Use Scenario: Enabling safe insertion/removal of daughter cards in a telecom line card shelf, where main backplane remains live at 3.3 V while module power ramps. IC Role / Device Role / Timing Role: Isolation buffer enforcing high-Z state during power sequencing using I_off and power-up 3-state behavior. Use Value: Prevents backfeeding into unpowered modules and avoids bus contention during insertion, meeting Telcordia GR-63-CORE reliability requirements.	Use Scenario: Signal conditioning between a 3.3-V microcontroller and 5-V LIN transceivers or relay drivers in a vehicle door module. IC Role / Device Role / Timing Role: Voltage-tolerant buffer handling wake-up signals, sensor reads, and actuator commands across mixed-supply subsystems. Use Value: Operates reliably at 2.7 V minimum V_CC, supporting battery brownout conditions; ESD ratings exceed automotive ISO 10605 requirements.

Industrial Backplane Interface

Embedded FPGA I/O Expansion

Use Scenario: Interfacing legacy 5-V peripheral modules (e.g., RS-232 transceivers, optocouplers) to a 3.3-V FPGA-based controller on a modular PLC backplane.

IC Role / Device Role / Timing Role: Level-translating buffer isolating voltage domains while preserving signal integrity and timing margins.

Use Value: Eliminates discrete level shifters and pull resistors, reducing interconnect delay by ≤2 ns versus resistor-based solutions and enabling direct connection to 5-V TTL peripherals.

Use Scenario: Expanding I/O count of a Xilinx Artix-7 FPGA by driving additional GPIO headers, where some pins must interface with 5-V sensors or actuators.

IC Role / Device Role / Timing Role: Noninverting 3-state buffer providing bidirectional signal conditioning and voltage translation on shared data buses.

Use Value: Bus-hold prevents floating inputs during reconfiguration; 64 mA drive strength ensures reliable fanout to multiple 5-V CMOS loads without signal degradation.

Hot-Swappable Module Control

Automotive Body Control Unit

Use Scenario: Enabling safe insertion/removal of daughter cards in a telecom line card shelf, where main backplane remains live at 3.3 V while module power ramps.

IC Role / Device Role / Timing Role: Isolation buffer enforcing high-Z state during power sequencing using I_off and power-up 3-state behavior.

Use Value: Prevents backfeeding into unpowered modules and avoids bus contention during insertion, meeting Telcordia GR-63-CORE reliability requirements.

Use Scenario: Signal conditioning between a 3.3-V microcontroller and 5-V LIN transceivers or relay drivers in a vehicle door module.

IC Role / Device Role / Timing Role: Voltage-tolerant buffer handling wake-up signals, sensor reads, and actuator commands across mixed-supply subsystems.

Use Value: Operates reliably at 2.7 V minimum V_CC, supporting battery brownout conditions; ESD ratings exceed automotive ISO 10605 requirements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad noninverting buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC125APWR	No bus-hold; 3.3-V only I/O (not 5-V tolerant); lower I_OL (24 mA); faster t_PD (2.5 ns typ).	Suitable for pure 3.3-V systems without legacy 5-V interfaces; requires external pull resistors if inputs float.	Select when cost or speed is prioritized over mixed-voltage tolerance and bus-hold integration.
74ALVC125MTCX	Higher V_CC range (1.65–3.6 V); no 5-V tolerance; ±24 mA I_O; no I_off or hot-insertion support.	Targeted at ultra-low-voltage portable designs; lacks protection features needed for industrial hot-swap use.	Choose for battery-powered IoT edge nodes where supply headroom is tight but 5-V interoperability is unnecessary.

Compared with SN74LVTH125PWRE4, SN74LVC125APWR offers higher speed at lower cost but forfeits 5-V tolerance and bus-hold, while 74ALVC125MTCX enables sub-2-V operation but removes hot-plug safety and mixed-voltage capability-making SN74LVTH125PWRE4 uniquely suited for robust 3.3/5-V bridging in industrial and telecom infrastructure.

Availability

SN74LVTH125PWRE4 is available at Aetrix Electronics and suitable for industrial backplane interfaces, FPGA I/O expansion, hot-swappable telecom modules, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LVTH125PWRE4 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 experience in industrial, automotive, and communications IC design.

The SN74LVTH125PWRE4 belongs to TI's LVTH logic family, engineered specifically for mixed-voltage system interfacing-enabling seamless integration between legacy 5-V TTL infrastructure and modern 3.3-V digital systems.

FAQ

What is the maximum input voltage rating for SN74LVTH125PWRE4?

The SN74LVTH125PWRE4 supports input voltages up to 7 V, including 5-V TTL logic levels, while operating from a 3.3-V supply. This 5-V tolerance is explicitly guaranteed in the absolute maximum ratings and recommended operating conditions, allowing direct connection to legacy 5-V buses without external level shifting.

Does SN74LVTH125PWRE4 require external pullup or pulldown resistors on its inputs?

No. The SN74LVTH125PWRE4 integrates bus-hold circuitry on all data inputs, actively maintaining a valid logic state when inputs are unused or undriven. TI explicitly states that external pullup/pulldown resistors are not recommended when bus-hold is enabled, reducing component count and layout complexity.

Can SN74LVTH125PWRE4 be used in hot-insertion applications?

Yes. The SN74LVTH125PWRE4 is fully specified for hot-insertion use via two key features: I_off circuitry disables outputs during power-down to prevent damaging current backflow, and power-up 3-state logic forces outputs into high-impedance during V_CC ramp-up/down, eliminating bus contention.

What is the thermal performance of SN74LVTH125PWRE4 in its TSSOP-14 package?

The SN74LVTH125PWRE4 in PW (TSSOP-14) package has a θ_JA of 113°C/W, measured per JESD 51-7. This value reflects typical board-level convection cooling; actual junction temperature rise depends on PCB copper area, airflow, and power dissipation-max ICC is 7 mA under full output loading at 3.6 V.

How does the bus-hold feature behave when V_CC is below 1.5 V?

When V_CC is between 0 and 1.5 V, the SN74LVTH125PWRE4 enters a high-impedance state regardless of OE status. However, bus-hold remains functional only above ~1.5 V; below that threshold, inputs may float unless externally biased, as confirmed in the functional description and power-up 3-state specifications.

SN74LVTH125PWRE4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVTH

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 4

Number of Bits per Element:: 1

Input Type:: -

Output Type:: 3-State

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

Voltage - Supply:: 2.7V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-TSSOP

SN74LVTH125PWRE4 FAQ

1.How can I place an order for SN74LVTH125PWRE4 through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVTH125PWRE4 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 SN74LVTH125PWRE4 reliable?

The price and inventory of SN74LVTH125PWRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTH125PWRE4 is usually 5 days.

3.What payment methods are accepted for SN74LVTH125PWRE4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVTH125PWRE4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74LVTH125PWRE4?

SN74LVTH125PWRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LVTH125PWRE4 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 SN74LVTH125PWRE4?

For technical support, including SN74LVTH125PWRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTH125PWRE4 requirements.

6.How does Aetrix verify that SN74LVTH125PWRE4 is sourced from the original manufacturer or authorized distributors?

All SN74LVTH125PWRE4 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 SN74LVTH125PWRE4 meets industry standards.

7.What is the process for return or replacement of SN74LVTH125PWRE4?

All SN74LVTH125PWRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH125PWRE4, 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 SN74LVTH125PWRE4 part is unused and in its original packaging.

Return procedure for SN74LVTH125PWRE4:

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…