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

Texas Instruments SN74LVC125AWBQARQ1

Name: SN74LVC125AWBQARQ1
Brand: Texas Instruments
SKU: SN74LVC125AWBQARQ1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LVC125AWBQARQ1

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 14-WFDFN Exposed Pad

Datasheet:: SN74LVC125AWBQARQ1.pdf

Description:: AUTOMOTIVE FOUR-CHANNEL 1.65V-TO

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Product details

Overview

SN74LVC125AWBQARQ1 from Texas Instruments is an automotive-qualified quadruple bus buffer gate with 3-state outputs, designed for 1.65V–3.6V V_CC operation, −40°C to +125°C ambient range, and 5.5V-tolerant inputs. It delivers 4.8ns max propagation delay at 3.3V and supports mixed-voltage translation in automotive body control modules and infotainment interfaces.

For engineers reviewing the SN74LVC125AWBQARQ1 datasheet, SN74LVC125AWBQARQ1 pinout, SN74LVC125AWBQARQ1 application, or SN74LVC125AWBQARQ1 equivalent, key selection criteria include 3-state output timing (t_pd, t_en, t_dis), automotive AEC-Q100 qualification, WQFN-14 thermal performance (R_θJA = 102.3°C/W), and 5.5V input tolerance enabling 3.3V/5V level-shifting without external circuitry.

Technical Context

This device implements four independent noninverting buffers, each with dedicated active-low output-enable (OE) control. Each buffer operates in one of two functional states: enabled (output follows input A) or high-impedance (output disabled when OE = high). The logic diagram confirms positive-logic behavior with no internal inversion.

Input voltage tolerance up to 5.5V-exceeding V_CC-enables direct interfacing with legacy 5V logic while powered from 3.3V or lower rails. Output drive strength is specified at ±24mA (I_OH/I_OL) at 3V, supporting fan-out into standard LVC loads without signal degradation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.65V to 3.6V - supports single-supply operation across low-voltage automotive domains including ADAS sensor interfaces and gateway MCUs.
Operating Temp	−40°C to +125°C - qualified per AEC-Q100 Grade 1, suitable for under-hood and cabin-mounted ECUs.
t_pd Max	4.8ns at 3.3V - enables reliable data buffering in high-speed serial bus segments (e.g., CAN FD transceiver interface lines).
Input Voltage	Up to 5.5V - allows direct connection to 5V microcontrollers or sensors without level-shifters in mixed-voltage systems.
I_OL/I_OH	±24mA at 3V - sufficient to drive multiple LVC inputs or small capacitive loads (<15pF) without timing skew.
ESD Rating	HBM ±2000V - meets automotive ESD robustness requirements for assembly and field operation.
Power Dissipation	500mW at TA ≤ 125°C - compatible with compact WQFN-14 packaging in space-constrained PCB layouts.

Pinout & Package

The SN74LVC125AWBQARQ1 uses a 14-pin WQFN (BQA) package measuring 3mm × 2.5mm with 0.5mm pitch and an exposed thermal pad. This leadless package provides superior thermal performance (R_θJA = 102.3°C/W) and board-space efficiency over SOIC or TSSOP alternatives.

Pin/Terminal	Circuit Role	Design Meaning
1OE, 4OE, 3OE, 2OE	Active-low output enable	Independent control per buffer; tie high to disable output and enter high-Z state during power sequencing.
1A–4A	Buffer input	Noninverting data inputs accepting 0–5.5V; compatible with both 3.3V and 5V logic families.
1Y–4Y	Buffer output	3-state outputs capable of sourcing/sinking ±24mA; high-Z when corresponding OE is high.
V_CC	Positive supply	Single 1.65–3.6V rail; requires local 0.1μF bypass capacitor adjacent to pin 14.
GND	Ground reference	Common return for all signals and supply; connect directly to solid ground plane beneath thermal pad.
Thermal Pad	Exposed die attach pad	Must be soldered to PCB ground plane for thermal dissipation and mechanical stability per SLUA271 guidelines.

Key Features

Feature	Design Value
AEC-Q100 Qualified	Grade 1 (−40°C to +125°C) qualification ensures reliability in automotive safety-critical subsystems such as lighting control and HVAC.
5.5V-Tolerant Inputs	Enables seamless integration with legacy 5V peripherals (e.g., LIN transceivers, EEPROMs) without external level translators.
Low Propagation Delay	4.8ns max t_pd at 3.3V supports real-time signal conditioning in time-sensitive applications like sensor data aggregation.
High-Noise Immunity	Typical V_OHV >2V and V_OLP <0.8V at 3.3V reduce susceptibility to ground bounce and crosstalk in dense routing environments.
Latch-Up Resilience	Exceeds 250mA per JESD17 - prevents destructive latch-up events during transient overvoltage conditions in vehicle electrical systems.

Applications

Automotive Body Control Module	Infotainment System Data Routing
Use Scenario: Isolating and buffering I/O lines between MCU and door module actuators (window lift, mirror adjust, seat position). IC Role / Device Role / Timing Role: Quad buffer provides independent enable control per function channel, allowing selective activation and reducing bus contention. Use Value: 5.5V input tolerance permits direct interface with 5V-position sensors; 3-state outputs prevent back-driving during MCU reset sequences.	Use Scenario: Level-shifting and signal conditioning between 3.3V application processor and 5V display interface or audio codec. IC Role / Device Role / Timing Role: Noninverting buffer with fast t_pd preserves signal integrity across parallel data buses (e.g., RGB, I²S) without introducing skew. Use Value: ±24mA drive capability sustains signal levels across 10cm+ PCB traces; thermal pad ensures stable operation under continuous display backlight load.
ADAS Sensor Interface Hub	Automotive Gateway Communication Bridge
Use Scenario: Aggregating digital status signals from radar, camera, and ultrasonic sensors before forwarding to central domain controller. IC Role / Device Role / Timing Role: Buffer isolates sensor-side noise from main bus; 3-state outputs allow dynamic bus sharing among multiple sensor clusters. Use Value: −40°C to +125°C rating matches sensor operating envelope; low ground bounce minimizes false triggers in high-EMI radar environments.	Use Scenario: Interfacing between CAN FD controller (3.3V) and legacy CAN transceiver (5V) or LIN physical layer. IC Role / Device Role / Timing Role: Directional signal conditioning element that decouples voltage domains while maintaining precise timing alignment. Use Value: 4.8ns t_pd ensures sub-bit-time latency in 5Mbps CAN FD frames; AEC-Q100 qualification validates use in ASIL-B communication paths.

Automotive Body Control Module

Infotainment System Data Routing

Use Scenario: Isolating and buffering I/O lines between MCU and door module actuators (window lift, mirror adjust, seat position).

IC Role / Device Role / Timing Role: Quad buffer provides independent enable control per function channel, allowing selective activation and reducing bus contention.

Use Value: 5.5V input tolerance permits direct interface with 5V-position sensors; 3-state outputs prevent back-driving during MCU reset sequences.

Use Scenario: Level-shifting and signal conditioning between 3.3V application processor and 5V display interface or audio codec.

IC Role / Device Role / Timing Role: Noninverting buffer with fast t_pd preserves signal integrity across parallel data buses (e.g., RGB, I²S) without introducing skew.

Use Value: ±24mA drive capability sustains signal levels across 10cm+ PCB traces; thermal pad ensures stable operation under continuous display backlight load.

ADAS Sensor Interface Hub

Automotive Gateway Communication Bridge

Use Scenario: Aggregating digital status signals from radar, camera, and ultrasonic sensors before forwarding to central domain controller.

IC Role / Device Role / Timing Role: Buffer isolates sensor-side noise from main bus; 3-state outputs allow dynamic bus sharing among multiple sensor clusters.

Use Value: −40°C to +125°C rating matches sensor operating envelope; low ground bounce minimizes false triggers in high-EMI radar environments.

Use Scenario: Interfacing between CAN FD controller (3.3V) and legacy CAN transceiver (5V) or LIN physical layer.

IC Role / Device Role / Timing Role: Directional signal conditioning element that decouples voltage domains while maintaining precise timing alignment.

Use Value: 4.8ns t_pd ensures sub-bit-time latency in 5Mbps CAN FD frames; AEC-Q100 qualification validates use in ASIL-B communication paths.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC125AQDRQ1	SOIC-14 package (8.65mm × 6mm); R_θJA = 127.8°C/W; same electrical specs and AEC-Q100 qualification.	Preferred where manual assembly, rework, or legacy footprint compatibility is required; less suitable for high-density automotive PCBs.	Select when thermal budget allows higher junction temperature rise or when board-level test access favors through-hole-compatible leads.
SN74LVC125AQPWRQ1	TSSOP-14 package (5.00mm × 6.4mm); R_θJA = 150.8°C/W; identical logic function and automotive qualification.	Better suited for mid-density layouts than SOIC but lacks thermal pad; requires careful thermal management in sustained 125°C operation.	Choose for cost-sensitive designs where WQFN assembly infrastructure is unavailable, and thermal derating can be accommodated.

Compared with SN74LVC125AQDRQ1 and SN74LVC125AQPWRQ1, the SN74LVC125AWBQARQ1 offers the lowest thermal resistance and smallest footprint-critical for modern automotive ECUs where board area and thermal headroom are constrained-but requires WQFN-specific reflow and inspection processes.

Availability

SN74LVC125AWBQARQ1 is available at Aetrix Electronics and suitable for automotive body control modules, infotainment system data routing, and ADAS sensor interface hubs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LVC125AWBQARQ1 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 technologies, with leadership in automotive-grade IC design, manufacturing, and qualification.

The SN74LVC125A-Q1 product line delivers AEC-Q100-compliant logic devices optimized for automotive signal integrity, voltage translation, and bus isolation in harsh-temperature environments.

FAQ

What is the maximum operating voltage for SN74LVC125AWBQARQ1 inputs?

The SN74LVC125AWBQARQ1 inputs accept voltages up to 5.5V regardless of V_CC level-enabling direct interfacing with 5V logic while operating from a 1.65V–3.6V supply. This specification is verified per Section 4.1 Absolute Maximum Ratings and confirmed in Table 4-3 Recommended Operating Conditions under "VI Input voltage".

Does SN74LVC125AWBQARQ1 require external pull-up resistors on OE pins?

Yes-TI recommends tying each OE pin to V_CC via a pull-up resistor during power-up/down to ensure outputs remain in high-impedance state. The minimum resistor value depends on the current-sinking capability of the driving source, as detailed in Section 6.1 Overview of the SN74LVC125AWBQARQ1 datasheet.

What is the thermal pad requirement for SN74LVC125AWBQARQ1?

The exposed thermal pad on the SN74LVC125AWBQARQ1 (BQA package) must be soldered to a PCB ground plane for thermal and mechanical reliability. TI literature SLUA271 specifies minimum solder coverage (87% of pad area), via placement guidance, and stencil design recommendations to ensure proper heat dissipation and mounting integrity.

Is SN74LVC125AWBQARQ1 pin-compatible with non-automotive SN74LVC125A variants?

No-while the logic function and pinout are identical, SN74LVC125AWBQARQ1 is AEC-Q100 qualified and tested across −40°C to +125°C, whereas commercial SN74LVC125A variants are rated only to 85°C and lack automotive qualification testing. Electrical parameters (e.g., t_pd, I_OL) are specified over different temperature ranges.

What is the recommended bypass capacitor for SN74LVC125AWBQARQ1 VCC?

Texas Instruments recommends a 0.1μF ceramic capacitor placed as close as possible to the V_CC pin (pin 14) of the SN74LVC125AWBQARQ1. For improved high-frequency noise suppression, this may be paralleled with a 1μF capacitor-both mounted directly on the top layer adjacent to the device per Section 7.1 Power Supply Recommendations.

SN74LVC125AWBQARQ1 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVC

Package/Case:: 14-WFDFN Exposed Pad

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:: 24mA, 24mA

Voltage - Supply:: 1.65V ~ 3.6V

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

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount, Wettable Flank

Supplier Device Package:: 14-WQFN (3x2.5)

SN74LVC125AWBQARQ1 FAQ

1.How can I place an order for SN74LVC125AWBQARQ1 through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVC125AWBQARQ1 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 SN74LVC125AWBQARQ1 reliable?

The price and inventory of SN74LVC125AWBQARQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC125AWBQARQ1 is usually 5 days.

3.What payment methods are accepted for SN74LVC125AWBQARQ1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC125AWBQARQ1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74LVC125AWBQARQ1?

SN74LVC125AWBQARQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LVC125AWBQARQ1 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 SN74LVC125AWBQARQ1?

For technical support, including SN74LVC125AWBQARQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC125AWBQARQ1 requirements.

6.How does Aetrix verify that SN74LVC125AWBQARQ1 is sourced from the original manufacturer or authorized distributors?

All SN74LVC125AWBQARQ1 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 SN74LVC125AWBQARQ1 meets industry standards.

7.What is the process for return or replacement of SN74LVC125AWBQARQ1?

All SN74LVC125AWBQARQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC125AWBQARQ1, 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 SN74LVC125AWBQARQ1 part is unused and in its original packaging.

Return procedure for SN74LVC125AWBQARQ1:

1.Submit a request within 90 days.

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

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