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

Texas Instruments SN74LV125ADBR

Name: SN74LV125ADBR
Brand: Texas Instruments
SKU: SN74LV125ADBR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LV125ADBR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 14-SSOP (0.209", 5.30mm Width)

Datasheet:: SN74LV125ADBR.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SN74LV125ADBR from Texas Instruments is a quadruple 3-state bus buffer gate designed for level-shifting and bus isolation in mixed-voltage systems. It operates from 2 V to 5.5 V, delivers 6 ns max propagation delay at 5 V, supports 5.5-V-tolerant inputs, and features I_off for partial-power-down mode. It is used in enterprise SSDs and Power over Ethernet (PoE) interfaces where controlled output enable and low ground bounce are critical.

For engineers reviewing the SN74LV125ADBR datasheet, SN74LV125ADBR pinout, SN74LV125ADBR application, or SN74LV125ADBR equivalent, this page provides verified functional identity, SSOP-14 package mapping, confirmed 3-state buffer behavior, real-world noise performance (VOLP < 0.8 V at 3.3 V), and two validated alternative parts with documented functional and application differences.

Technical Context

The SN74LV125ADBR implements four independent noninverting buffers, each with an active-low 3-state output enable (OE). Its CMOS design enables bidirectional voltage translation: inputs tolerate up to 5.5 V regardless of V_CC, while outputs swing rail-to-rail between GND and V_CC. The I_off feature disables current flow when V_CC = 0, preventing back-drive during hot insertion.

It exhibits low dynamic noise-typical VOLP < 0.8 V and VOHV > 2.3 V at 3.3 V/25°C-and meets JESD 17 latch-up (>250 mA) and JESD 22 ESD ratings (4000-V HBM, 2000-V CDM). Switching performance scales with supply: t_pd = 3.4 ns (typ) at 5 V, 4.8 ns at 3.3 V, and 6.8 ns at 2.5 V, all measured into 15-pF load.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2 V to 5.5 V - supports mixed-mode voltage operation across ports and enables down-translation from 5-V logic to 3.3-V or 2.5-V buses
Max t_pd	6 ns at 5 V - ensures fast signal routing in high-speed digital interfaces without excessive timing margin overhead
Input Voltage Tolerance	Up to 5.5 V - allows safe interfacing with higher-voltage controllers while powered from lower V_CC
I_off Current	≤5 µA at 5.5 V - guarantees isolation during partial power-down, protecting powered sections from unpowered ones
Output Drive	±16 mA at 5 V - sufficient for driving moderate capacitive loads (e.g., PCB traces, multiple CMOS inputs) without external buffering
ESD Rating (HBM)	±4000 V - exceeds industrial requirements and reduces need for external protection in board-level ESD zones
Operating Temperature	–40°C to +125°C - qualified for extended industrial and PoE-powered equipment environments

Pinout & Package

SN74LV125ADBR is packaged in a 14-pin SSOP (Shrink Small Outline Package) with body size 6.20 mm × 5.30 mm and standard 0.65-mm lead pitch. This surface-mount package supports automated assembly and offers improved thermal resistance (R_θJA = 105.0°C/W) versus SOIC.

Pin/Terminal	Circuit Role	Design Meaning
1, 4, 10, 13 (1OE, 2OE, 3OE, 4OE)	Active-Low Output Enable	Each controls one buffer's 3-state output independently; pulled high via resistor to ensure high-Z at power-up
2, 5, 9, 12 (1A, 2A, 3A, 4A)	Buffer Input	CMOS-compatible inputs tolerant to 5.5 V regardless of V_CC; must be tied to V_CC or GND if unused
3, 6, 8, 11 (1Y, 2Y, 3Y, 4Y)	Noninverting Buffer Output	3-state outputs drive rail-to-rail (GND to V_CC) when enabled; high-impedance when OE = high
7	GND	Ground reference for all logic and output stages; requires low-inductance connection to system ground plane
14	V_CC	Power supply input (2–5.5 V); requires local 0.1-µF ceramic bypass capacitor placed adjacent to pin

Key Features

Feature	Design Value
Wide V_CC range (2–5.5 V)	Enables single-buffer deployment across 2.5-V, 3.3-V, and 5-V subsystems without redesign or level shifters
5.5-V-tolerant inputs	Permits direct connection to legacy 5-V microcontrollers or FPGAs while operating at 3.3 V, eliminating external translators
I_off partial-power-down support	Blocks current flow between powered and unpowered domains, satisfying hot-swap and live-insertion requirements in modular systems
Low ground bounce (VOLP < 0.8 V)	Reduces switching noise coupling into shared ground paths, improving signal integrity in dense PCB layouts
High ESD robustness (4000-V HBM)	Lowers risk of field failure during handling or end-user operation, reducing warranty claims in industrial deployments

Applications

Enterprise SSD Interconnect	Power over Ethernet (PoE) Controller Interface
Use Scenario: Isolating host controller address/data lines from NAND flash arrays during firmware updates or power sequencing. IC Role / Device Role / Timing Role: 3-state bus buffer enabling selective disconnection of flash channels without disrupting host-side logic. Use Value: Prevents bus contention during partial reconfiguration and supports 5-V-tolerant host signaling at 3.3-V V_CC, simplifying voltage domain bridging.	Use Scenario: Level-shifting control signals between a 5-V PoE PD controller and a 3.3-V MCU managing power classification and detection. IC Role / Device Role / Timing Role: Noninverting buffer with independent OE pins allowing precise timing of power negotiation sequences. Use Value: Eliminates discrete level translators; I_off prevents back-drive when PoE controller powers down before MCU, meeting IEEE 802.3af/at sequencing requirements.
Industrial PLC I/O Expansion	Motor Drive Logic Interface
Use Scenario: Driving isolated digital I/O modules from a central FPGA, where multiple voltage rails coexist on the same backplane. IC Role / Device Role / Timing Role: Quad buffer providing galvanically isolated signal conditioning with per-channel enable for fault containment. Use Value: Enables mixed-voltage backplane designs (e.g., 2.5-V FPGA core, 3.3-V I/O banks, 5-V sensors) using one standardized interface IC.	Use Scenario: Interfacing position encoder feedback (5-V TTL) to a 3.3-V motor control ASIC while maintaining noise immunity. IC Role / Device Role / Timing Role: Low-noise buffer suppressing ground bounce-induced jitter in high-resolution encoder timing paths. Use Value: VOLP < 0.8 V at 3.3 V minimizes timing uncertainty in edge-sensitive quadrature decoding, improving position accuracy.

Enterprise SSD Interconnect

Power over Ethernet (PoE) Controller Interface

Use Scenario: Isolating host controller address/data lines from NAND flash arrays during firmware updates or power sequencing.

IC Role / Device Role / Timing Role: 3-state bus buffer enabling selective disconnection of flash channels without disrupting host-side logic.

Use Value: Prevents bus contention during partial reconfiguration and supports 5-V-tolerant host signaling at 3.3-V V_CC, simplifying voltage domain bridging.

Use Scenario: Level-shifting control signals between a 5-V PoE PD controller and a 3.3-V MCU managing power classification and detection.

IC Role / Device Role / Timing Role: Noninverting buffer with independent OE pins allowing precise timing of power negotiation sequences.

Use Value: Eliminates discrete level translators; I_off prevents back-drive when PoE controller powers down before MCU, meeting IEEE 802.3af/at sequencing requirements.

Industrial PLC I/O Expansion

Motor Drive Logic Interface

Use Scenario: Driving isolated digital I/O modules from a central FPGA, where multiple voltage rails coexist on the same backplane.

IC Role / Device Role / Timing Role: Quad buffer providing galvanically isolated signal conditioning with per-channel enable for fault containment.

Use Value: Enables mixed-voltage backplane designs (e.g., 2.5-V FPGA core, 3.3-V I/O banks, 5-V sensors) using one standardized interface IC.

Use Scenario: Interfacing position encoder feedback (5-V TTL) to a 3.3-V motor control ASIC while maintaining noise immunity.

IC Role / Device Role / Timing Role: Low-noise buffer suppressing ground bounce-induced jitter in high-resolution encoder timing paths.

Use Value: VOLP < 0.8 V at 3.3 V minimizes timing uncertainty in edge-sensitive quadrature decoding, improving position accuracy.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-state buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC125A	Lower V_CC min (1.65 V), faster t_pd (3.5 ns @ 3.3 V), but only 3.6-V input tolerance - not 5.5-V tolerant	Suitable for pure 3.3-V or 2.5-V systems; unsuitable where 5-V inputs must be accepted at 3.3-V V_CC	Select SN74LVC125A only if all driving sources are ≤3.6 V and sub-4-ns speed is required.
74AUP1G125	Single-channel, ultra-low power (I_CC = 0.9 µA), 0.8–3.6-V operation, but no 5.5-V input tolerance and only 12-mA drive	Targeted at battery-powered sensor nodes; lacks quad integration and industrial drive strength	Choose 74AUP1G125 for space-constrained, low-quiescent IoT endpoints-not for multi-channel industrial bus isolation.

Compared with SN74LV125ADBR, SN74LVC125A trades 5.5-V input tolerance for higher speed and lower voltage operation, while 74AUP1G125 sacrifices channel count and drive strength for nanowatt standby power-neither matches the SN74LV125ADBR's combination of quad 3-state buffering, 5.5-V tolerance, and industrial temperature range.

Availability

SN74LV125ADBR is available at Aetrix Electronics and suitable for enterprise SSD interconnect, Power over Ethernet (PoE) controller interfaces, and industrial PLC I/O expansion requiring stable component supply across long production lifecycles.

Supply support for SN74LV125ADBR 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 industrial-grade interface ICs.

The SN74LV125A product line delivers robust, wide-supply 3-state buffers for voltage-domain bridging in harsh environments-designed specifically for reliability-critical industrial, PoE, and storage applications.

FAQ

What is the maximum operating temperature for SN74LV125ADBR?

The SN74LV125ADBR is rated for operation from –40°C to +125°C ambient temperature. This extended industrial temperature range is validated per TI's characterization and testing protocols and supports deployment in enclosed PoE-powered equipment and motor drive enclosures where internal temperatures exceed 85°C.

Does SN74LV125ADBR support 5-V inputs when powered at 3.3 V?

Yes, SN74LV125ADBR supports input voltages up to 5.5 V regardless of V_CC level. When V_CC = 3.3 V, the inputs remain fully 5-V tolerant-enabling direct connection to 5-V microcontrollers or legacy peripherals without external level-shifting circuitry.

What is the purpose of the I_off feature in SN74LV125ADBR?

The I_off feature in SN74LV125ADBR disables current flow through the device when V_CC = 0 V, preventing back-drive from powered downstream circuits into unpowered sections. This supports safe hot-insertion in modular systems and satisfies partial-power-down requirements in complex power-sequenced designs.

Can SN74LV125ADBR replace SN74LV125ADR in a design?

SN74LV125ADBR (SSOP-14) and SN74LV125ADR (SOIC-14) share identical electrical specifications and logic functionality. However, they differ in package dimensions, thermal resistance (R_θJA = 105.0°C/W vs. 92.7°C/W), and solder reflow profile-requiring PCB layout and process validation before substitution.

What is the typical ground bounce (VOLP) performance of SN74LV125ADBR?

At V_CC = 3.3 V and T_A = 25°C, SN74LV125ADBR exhibits typical output ground bounce (VOLP) of less than 0.8 V. This low noise characteristic helps maintain signal integrity in high-density layouts where multiple buffers switch simultaneously on shared ground planes.

SN74LV125ADBR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LV

Package/Case:: 14-SSOP (0.209", 5.30mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

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-SSOP

SN74LV125ADBR FAQ

1.How can I place an order for SN74LV125ADBR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LV125ADBR 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 SN74LV125ADBR reliable?

The price and inventory of SN74LV125ADBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV125ADBR is usually 5 days.

3.What payment methods are accepted for SN74LV125ADBR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV125ADBR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74LV125ADBR?

SN74LV125ADBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LV125ADBR 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 SN74LV125ADBR?

For technical support, including SN74LV125ADBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV125ADBR requirements.

6.How does Aetrix verify that SN74LV125ADBR is sourced from the original manufacturer or authorized distributors?

All SN74LV125ADBR 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 SN74LV125ADBR meets industry standards.

7.What is the process for return or replacement of SN74LV125ADBR?

All SN74LV125ADBR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV125ADBR, 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 SN74LV125ADBR part is unused and in its original packaging.

Return procedure for SN74LV125ADBR:

1.Submit a request within 90 days.

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

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