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

Texas Instruments SN74LV125APWRG4

Name: SN74LV125APWRG4
Brand: Texas Instruments
SKU: SN74LV125APWRG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LV125APWRG4

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: SN74LV125APWRG4.pdf

Description:: IC BUF NON-INVERT 5.5V 14TSSOP

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Product details

Overview

SN74LV125APWRG4 from Texas Instruments is a quadruple 3-state bus buffer gate designed for level-translating, bidirectional bus isolation in mixed-voltage systems. It operates from 2 V to 5.5 V, delivers ≤5.5 ns propagation delay at 5 V, supports 5.5-V-tolerant inputs, features I_off partial-power-down protection, and is qualified for industrial temperature range (–40°C to 125°C). It is used in enterprise SSD interconnects and PoE-powered endpoint interfaces.

For engineers reviewing the SN74LV125APWRG4 datasheet, SN74LV125APWRG4 pinout, SN74LV125APWRG4 application, or SN74LV125APWRG4 equivalent, key selection criteria include its 3-state output control timing (t_en/t_dis), V_CC-scalable drive strength (±16 mA at 5 V), ground-bounce immunity (V_OLP < 0.8 V @ 3.3 V), and compatibility with 14-pin TSSOP layout constraints.

Technical Context

The SN74LV125APWRG4 implements four independent noninverting buffers, each with an active-low 3-state output enable (OE) input. Its CMOS design enables mixed-mode voltage operation: inputs tolerate up to 5.5 V regardless of V_CC, allowing down-translation from 5-V logic to 3.3-V or 2.5-V buses.

It integrates I_off circuitry that disables all outputs and blocks current flow when V_CC = 0 V, supporting live insertion and back-drive protection. Latch-up immunity exceeds 250 mA per JESD 17, and ESD robustness meets ±4000-V HBM, ±2000-V CDM, and ±200-V MM ratings.

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)	5.5 ns @ 5 V, 15 pF - Ensures sub-6-ns signal routing for high-speed control bus applications.
I_OL/I_OH	±16 mA @ 5 V - Provides sufficient drive for stub-loaded parallel buses while limiting ground bounce.
V_I (max)	5.5 V - Allows 5-V inputs to safely interface with lower V_CC supplies (e.g., 3.3 V), enabling voltage translation.
I_off	5 µA max @ 5.5 V - Prevents damaging current flow during partial power-down or hot-swap events.
Operating Temp	–40°C to +125°C - Supports deployment in industrial motor drives and PoE-powered infrastructure equipment.
ESD Rating	±4000-V HBM - Reduces risk of field failure in handling-sensitive manufacturing and field-replaceable modules.

Pinout & Package

TSSOP-14 (PW) package: 5.00 mm × 4.40 mm body, 0.65 mm lead pitch, exposed pad not present, RoHS-compliant NiPdAu finish, MSL Level-1.

Pin/Terminal	Circuit Role	Design Meaning
1, 4, 10, 13 (1OE, 2OE, 3OE, 4OE)	Active-low output enable	Individually disables corresponding Y output into high-impedance state; tie high via pullup for power-up safety.
2, 5, 9, 12 (1A, 2A, 3A, 4A)	Buffer input	5.5-V-tolerant CMOS input; accepts logic levels independent of V_CC value.
3, 6, 8, 11 (1Y, 2Y, 3Y, 4Y)	Noninverting buffered output	3-state CMOS output; drives high/low when OE low; high-Z when OE high.
7	GND	Reference ground for all I/O and internal circuitry; requires low-inductance connection to system ground plane.
14	V_CC	Primary supply rail; bypass with 0.1 µF ceramic capacitor placed within 2 mm of pin.

Key Features

Feature	Design Value
Mixed-mode voltage operation	Inputs accept 0–5.5 V regardless of V_CC (2–5.5 V), enabling seamless 5-V-to-3.3-V bus translation without external components.
I_off partial-power-down support	Blocks current flow between powered and unpowered sections, preventing back-drive damage during hot-swap or staged power sequencing.
Low ground bounce (V_OLP)	<0.8 V @ 3.3 V - Minimizes noise coupling into shared ground paths in dense PCB layouts.
High noise immunity (V_OHV)	>2.3 V @ 3.3 V - Suppresses undershoot-induced false triggering on adjacent signal lines.
Latch-up immunity	>250 mA per JESD 17 - Ensures robust operation under transient overcurrent conditions in industrial environments.

Applications

Enterprise SSD Interconnect	Power over Ethernet Endpoint
Use Scenario: Isolating host controller address/data buses from NAND flash channel controllers in multi-die SSD modules. IC Role / Device Role / Timing Role: Bidirectional 3-state buffer enabling time-multiplexed access to shared command/address lines between host and flash controller ASICs. Use Value: Eliminates need for discrete level shifters due to 5.5-V-tolerant inputs and 2–5.5-V V_CC scalability, reducing BOM count and board area.	Use Scenario: Buffering control signals (e.g., PD detection, classification, and maintenance messages) between PoE PSE controller and powered device PHY. IC Role / Device Role / Timing Role: Low-propagation-delay bus gate isolating 3.3-V microcontroller I/O from 5-V auxiliary power management circuitry. Use Value: Sub-6-ns t_pd ensures timing-critical PD classification pulses meet IEEE 802.3af/at deadlines without added latency.
Programmable Logic Controller I/O Expansion	Motor Drive Control Interface
Use Scenario: Expanding digital I/O capacity on PLC backplanes by buffering FPGA-configurable GPIO to isolated field-side terminals. IC Role / Device Role / Timing Role: Quad 3-state driver providing galvanically isolated signal conditioning between logic-level FPGA banks and optocoupler input stages. Use Value: I_off protection prevents fault currents from propagating into unpowered FPGA banks during field module hot-swap operations.	Use Scenario: Interfacing microcontroller PWM outputs to gate drivers in multi-axis servo inverters with distributed control architecture. IC Role / Device Role / Timing Role: Noninverting buffer stage ensuring clean, slew-controlled logic transitions reach isolated gate driver inputs without ringing. Use Value: Controlled edge rates and low V_OLP minimize EMI generation near sensitive current-sense amplifiers and analog feedback paths.

Enterprise SSD Interconnect

Power over Ethernet Endpoint

Use Scenario: Isolating host controller address/data buses from NAND flash channel controllers in multi-die SSD modules.

IC Role / Device Role / Timing Role: Bidirectional 3-state buffer enabling time-multiplexed access to shared command/address lines between host and flash controller ASICs.

Use Value: Eliminates need for discrete level shifters due to 5.5-V-tolerant inputs and 2–5.5-V V_CC scalability, reducing BOM count and board area.

Use Scenario: Buffering control signals (e.g., PD detection, classification, and maintenance messages) between PoE PSE controller and powered device PHY.

IC Role / Device Role / Timing Role: Low-propagation-delay bus gate isolating 3.3-V microcontroller I/O from 5-V auxiliary power management circuitry.

Use Value: Sub-6-ns t_pd ensures timing-critical PD classification pulses meet IEEE 802.3af/at deadlines without added latency.

Programmable Logic Controller I/O Expansion

Motor Drive Control Interface

Use Scenario: Expanding digital I/O capacity on PLC backplanes by buffering FPGA-configurable GPIO to isolated field-side terminals.

IC Role / Device Role / Timing Role: Quad 3-state driver providing galvanically isolated signal conditioning between logic-level FPGA banks and optocoupler input stages.

Use Value: I_off protection prevents fault currents from propagating into unpowered FPGA banks during field module hot-swap operations.

Use Scenario: Interfacing microcontroller PWM outputs to gate drivers in multi-axis servo inverters with distributed control architecture.

IC Role / Device Role / Timing Role: Noninverting buffer stage ensuring clean, slew-controlled logic transitions reach isolated gate driver inputs without ringing.

Use Value: Controlled edge rates and low V_OLP minimize EMI generation near sensitive current-sense amplifiers and analog feedback paths.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC125APWR	Lower V_CC min (1.65 V), faster t_pd (3.7 ns @ 3.3 V), but only 3.6-V input tolerance - no 5-V input support.	Suitable for pure 3.3-V or 2.5-V systems; unsuitable where legacy 5-V signaling coexists.	Select when operating exclusively below 3.6 V and maximum speed is critical; avoid if 5-V inputs must be accepted.
74LVX125MTCX	Same 2–3.6-V V_CC range and 5-V-tolerant inputs, but slower t_pd (9.5 ns @ 3.3 V) and higher I_off (10 µA).	Better suited for cost-sensitive, lower-speed industrial controls where timing margin is ample.	Choose for legacy designs migrating from older LVX family; verify timing slack with worst-case t_pd + t_dis.

Compared with SN74LVC125APWR and 74LVX125MTCX, SN74LV125APWRG4 uniquely balances 5-V input tolerance, industrial temperature range, and sub-6-ns speed - making it optimal for mixed-voltage infrastructure nodes where reliability and voltage flexibility outweigh marginal speed gains.

Availability

SN74LV125APWRG4 is available at Aetrix Electronics and suitable for enterprise SSD interconnects, Power over Ethernet endpoints, and programmable logic controller I/O expansion requiring stable component supply across extended temperature and mixed-voltage conditions.

Supply support for SN74LV125APWRG4 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 company specializing in analog and embedded processing solutions, with leadership in industrial, automotive, and communications markets.

The SN74LV125A belongs to TI's LV logic family, engineered for robust, low-power, mixed-voltage bus interfacing in harsh industrial environments - emphasizing voltage translation, power-down safety, and ESD resilience.

FAQ

What is the maximum input voltage rating for SN74LV125APWRG4?

The SN74LV125APWRG4 supports input voltages up to 5.5 V regardless of V_CC level - a key feature enabling direct interfacing of 5-V logic signals into 3.3-V or 2.5-V systems without external level shifters. This 5.5-V tolerance applies to all A-input pins (1A, 2A, 3A, 4A) and is specified across the full operating temperature range (–40°C to 125°C). The SN74LV125APWRG4 maintains this rating even when V_CC is as low as 2 V.

Does SN74LV125APWRG4 support partial power-down operation?

Yes, SN74LV125APWRG4 includes I_off circuitry that actively disables all outputs and blocks current flow when V_CC = 0 V. This allows safe hot insertion into live backplanes and prevents back-drive damage when one side of a bus is powered while the other is not. Measured I_off is ≤5 µA at 5.5 V, meeting JESD 78 requirements for partial-power-down integrity.

What is the typical propagation delay of SN74LV125APWRG4 at 3.3 V?

At V_CC = 3.3 V and 15-pF load, the typical propagation delay (t_pd) of SN74LV125APWRG4 is 4.8 ns, with a maximum of 11 ns over the full industrial temperature range (–40°C to 125°C). This value is measured from A-input to Y-output transition under standard test conditions defined in TI's SCES124O datasheet Figure 7-1.

Which package variant does SN74LV125APWRG4 use?

SN74LV125APWRG4 uses the TSSOP-14 (PW) package: 5.00 mm × 4.40 mm body size, 0.65 mm lead pitch, 14-pin configuration, RoHS-compliant NiPdAu lead finish, and moisture sensitivity level (MSL) 1 - meaning unlimited floor life at ≤30°C/60% RH. It is supplied in 2000-piece tape-and-reel format.

How does SN74LV125APWRG4 handle ground bounce and output undershoot?

SN74LV125APWRG4 is characterized for low dynamic noise: typical output ground bounce (V_OLP) is <0.8 V and output undershoot (V_OHV) exceeds 2.3 V at V_CC = 3.3 V and T_A = 25°C. These values reflect controlled edge rates and optimized output drive strength - critical for maintaining signal integrity in densely routed industrial PCBs where shared ground paths are common.

SN74LV125APWRG4 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

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:: 16mA, 16mA

Voltage - Supply:: 2V ~ 5.5V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-TSSOP

SN74LV125APWRG4 FAQ

1.How can I place an order for SN74LV125APWRG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LV125APWRG4 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 SN74LV125APWRG4 reliable?

The price and inventory of SN74LV125APWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV125APWRG4 is usually 5 days.

3.What payment methods are accepted for SN74LV125APWRG4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV125APWRG4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74LV125APWRG4?

SN74LV125APWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LV125APWRG4 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 SN74LV125APWRG4?

For technical support, including SN74LV125APWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV125APWRG4 requirements.

6.How does Aetrix verify that SN74LV125APWRG4 is sourced from the original manufacturer or authorized distributors?

All SN74LV125APWRG4 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 SN74LV125APWRG4 meets industry standards.

7.What is the process for return or replacement of SN74LV125APWRG4?

All SN74LV125APWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV125APWRG4, 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 SN74LV125APWRG4 part is unused and in its original packaging.

Return procedure for SN74LV125APWRG4:

1.Submit a request within 90 days.

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

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