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Texas Instruments SN74LVC125AQDRQ1
- Part No.:
- SN74LVC125AQDRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74LVC125AQDRQ1.pdf
- Description:
- IC BUF NON-INVERT 3.6V 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,958
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Product details
Overview
SN74LVC125AQDRQ1 from Texas Instruments is an automotive-qualified quadruple bus buffer gate with 3-state outputs, operating from 1.65V to 3.6V over –40°C to 125°C. It features 5.5V-tolerant inputs, 4.8ns max propagation delay at 3.3V, and latch-up immunity >250mA-used in automotive infotainment data routing and ECU-level signal isolation.
For engineers reviewing the SN74LVC125AQDRQ1 datasheet, SN74LVC125AQDRQ1 pinout, SN74LVC125AQDRQ1 application, or SN74LVC125AQDRQ1 equivalent, key selection criteria include 3-state output control timing (tdis ≤ 4.4ns at 3.3V), 5.5V input tolerance for mixed-voltage interfacing, and SOIC-14 package compatibility with legacy automotive PCB layouts.
Technical Context
This device implements four independent noninverting buffers, each with dedicated active-low output-enable (OE) control. Each buffer transitions to high-impedance state when its OE is high, enabling bidirectional bus sharing without contention.
Input voltage tolerance up to 5.5V allows direct interfacing with 5V logic while powered from 3.3V or lower supplies. Output drive strength is specified at ±24mA (IOL/IOH) at 3V, supporting TTL- and CMOS-compatible loads across the full automotive temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V–3.6V: Enables operation across low-power microcontroller I/O domains and standard 3.3V automotive subsystems. |
| Operating Temp | –40°C to 125°C: Qualified per AEC-Q100 Grade 1 for under-hood and body-control module deployment. |
| tpd Max | 4.8ns at 3.3V: Supports high-speed data transfer in CAN/LIN gateway buffering and sensor interface multiplexing. |
| Input Voltage | Up to 5.5V: Allows safe connection to legacy 5V peripherals without level-shifting circuitry. |
| Output Drive | ±24mA at 3V: Sufficient to drive 50Ω transmission lines or multiple CMOS inputs in distributed control networks. |
| ESD Rating | HBM ±2000V, CDM ±1000V: Meets AEC-Q100-002/-011 for robustness in manufacturing and field environments. |
| Power Dissipation | 500mW at TA ≤ 125°C: Compatible with passive thermal management in sealed junction boxes and instrument clusters. |
Pinout & Package
SN74LVC125AQDRQ1 is packaged in a 14-pin SOIC (D package) with 8.65mm × 6mm body size and 1.75mm maximum height. The package is RoHS-compliant, lead-finished with NiPdAu, and rated MSL Level-1 for unlimited floor life.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 (OE) | Active-low output enable | Independent control per buffer; tie high to disable output and prevent bus contention. |
| 2, 5, 9, 12 (A) | Buffer input | Noninverting data input; accepts 0–5.5V signals regardless of VCC level. |
| 3, 6, 8, 11 (Y) | 3-state output | Drives bus when OE low; high-Z when OE high-enables shared data path arbitration. |
| 7 (GND) | Ground reference | Primary return path for all I/O and supply currents; requires low-inductance PCB connection. |
| 14 (VCC) | Positive supply | Single power rail for logic core and I/O; bypass with 0.1μF capacitor placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Grade 1 certification ensures reliability in automotive powertrain, chassis, and ADAS modules. |
| 5.5V-tolerant inputs | Eliminates external level shifters when interfacing 5V sensors or legacy controllers to 3.3V MCUs. |
| Low ground bounce | VOLP < 0.8V at 3.3V ensures stable reference during fast switching-critical for noise-sensitive analog domains. |
| Fast enable/disable | tdis ≤ 4.4ns and ten ≤ 5.2ns at 3.3V enables precise timing control in time-triggered communication stacks. |
| Latch-up immunity | Exceeds 250mA per JESD17, preventing destructive failure during transient overvoltage events in vehicle electrical systems. |
Applications
| Automotive Infotainment Data Routing | Body Control Module Signal Isolation |
|---|---|
Use Scenario: Routing audio/video data between head unit MCU and display processor across varying voltage domains. IC Role / Device Role / Timing Role: Bidirectional bus buffer with independent 3-state control per channel, enabling dynamic bus arbitration. Use Value: 5.5V input tolerance eliminates discrete level shifters; 4.8ns tpd supports real-time HDMI auxiliary channel timing. | Use Scenario: Isolating door module LIN transceiver signals from central body controller to prevent fault propagation. IC Role / Device Role / Timing Role: Unidirectional signal conditioner with controlled enable timing to synchronize wake-up sequences. Use Value: –40°C to 125°C operation ensures reliability in door latch actuators; ±24mA drive handles LIN bus capacitive loading. |
| Engine Control Unit Sensor Multiplexing | ADAS Camera Interface Buffering |
Use Scenario: Multiplexing analog sensor outputs (e.g., MAP, TPS) into ADC inputs of engine ECU with noise suppression. IC Role / Device Role / Timing Role: Low-noise buffer stage with high-Z isolation during ADC sampling windows. Use Value: VOLP < 0.8V minimizes ground bounce interference on sensitive analog reference rails. | Use Scenario: Buffering MIPI CSI-2 clock and data lanes between camera sensor and SoC in rear-view systems. IC Role / Device Role / Timing Role: High-speed signal repeater with matched propagation delay across all four channels. Use Value: 4.8ns max tpd and 1.5ns skew (tsk(o)) maintain pixel clock integrity across multi-lane interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125APWRQ1 | TSSOP-14 package (5.00mm × 6.4mm); 150.8°C/W RθJA vs. 127.8°C/W for SOIC. | Better suited for space-constrained PCBs but requires rework of thermal pad layout and stencil design. | Select when board area is constrained and thermal margin permits higher junction temperature rise. |
| SN74LVC125AWBQARQ1 | WQFN-14 (3mm × 2.5mm) with exposed thermal pad; 102.3°C/W RθJA; no leads. | Enables ultra-compact placement and superior thermal performance but demands precision solder paste volume control. | Choose for high-density automotive modules where thermal dissipation and footprint reduction outweigh assembly complexity. |
Compared with SN74LVC125APWRQ1 and SN74LVC125AWBQARQ1, SN74LVC125AQDRQ1 offers the highest mechanical robustness and easiest hand-soldering/reflow compatibility in legacy SOIC footprints-ideal for production continuity in established automotive platforms.
Availability
SN74LVC125AQDRQ1 is available at Aetrix Electronics and suitable for automotive infotainment systems, body control modules, and engine control units requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SN74LVC125AQDRQ1 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 ICs and functional safety solutions.
The SN74LVC125A-Q1 belongs to TI's automotive logic portfolio, designed specifically for signal integrity, voltage translation, and bus isolation in harsh-temperature vehicle subsystems.
FAQ
What is the maximum propagation delay of SN74LVC125AQDRQ1 at 3.3V?
The maximum propagation delay (tpd) of SN74LVC125AQDRQ1 is 4.6ns at 3.3V ±0.3V and 25°C, and 6ns across the full –40°C to 125°C operating range. This value applies to the A-to-Y path and ensures deterministic timing in high-speed automotive data paths such as sensor multiplexing and display interface bridging. SN74LVC125AQDRQ1 maintains this performance without derating across its qualified temperature envelope.
Does SN74LVC125AQDRQ1 support 5V input signals while powered at 3.3V?
Yes, SN74LVC125AQDRQ1 supports input voltages up to 5.5V independent of VCC level, enabling direct interfacing with 5V legacy peripherals in mixed-voltage automotive systems. This eliminates external level-shifting components when connecting to 5V sensors or microcontrollers while SN74LVC125AQDRQ1 operates from a 3.3V supply. Input clamp current is limited to ±50mA per absolute maximum ratings.
What is the recommended bypass capacitor for SN74LVC125AQDRQ1?
Texas Instruments recommends a 0.1μF ceramic bypass capacitor placed as close as possible to the VCC pin (Pin 14) of SN74LVC125AQDRQ1 to suppress high-frequency supply noise. For boards with multiple VCC pins or stringent EMI requirements, paralleling a 1μF capacitor improves low-frequency decoupling. SN74LVC125AQDRQ1's SOIC package allows straightforward placement adjacent to Pin 14 without vias or routing detours.
How does SN74LVC125AQDRQ1 handle unused inputs?
All unused inputs of SN74LVC125AQDRQ1 must be tied to either VCC or GND to prevent floating states that cause increased ICC, noise coupling, or undefined logic behavior. TI specifies that unused OE pins should be pulled high (to VCC) via a resistor to ensure outputs remain in high-impedance mode during power-up. SN74LVC125AQDRQ1's input structure tolerates 5.5V, so pull-up resistors may connect directly to 3.3V or 5V rails depending on system architecture.
Is SN74LVC125AQDRQ1 pin-compatible with non-automotive versions like SN74LVC125A?
SN74LVC125AQDRQ1 shares identical pinout, functionality, and electrical characteristics with the commercial SN74LVC125A in SOIC-14 packaging, but adds AEC-Q100 qualification, extended temperature range (–40°C to 125°C), and enhanced reliability testing. SN74LVC125AQDRQ1 is not a drop-in replacement for non-automotive variants in safety-critical designs unless full automotive qualification documentation and PPAP compliance are verified.
SN74LVC125AQDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 14-SOIC (0.154", 3.90mm 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
SN74LVC125AQDRQ1 FAQ
1.How can I place an order for SN74LVC125AQDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC125AQDRQ1 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 SN74LVC125AQDRQ1 reliable?
The price and inventory of SN74LVC125AQDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC125AQDRQ1 is usually 5 days.
3.What payment methods are accepted for SN74LVC125AQDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC125AQDRQ1 transactions.
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4.How is shipping managed for SN74LVC125AQDRQ1?
SN74LVC125AQDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC125AQDRQ1 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 SN74LVC125AQDRQ1?
For technical support, including SN74LVC125AQDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC125AQDRQ1 requirements.
6.How does Aetrix verify that SN74LVC125AQDRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74LVC125AQDRQ1 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 SN74LVC125AQDRQ1 meets industry standards.
7.What is the process for return or replacement of SN74LVC125AQDRQ1?
All SN74LVC125AQDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC125AQDRQ1, 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 SN74LVC125AQDRQ1 part is unused and in its original packaging.
Return procedure for SN74LVC125AQDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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