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Texas Instruments SN74LVC125AQDRG4Q1
- Part No.:
- SN74LVC125AQDRG4Q1
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74LVC125AQDRG4Q1.pdf
- Description:
- IC BUF NON-INVERT 3.6V 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,844
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Product details
Overview
SN74LVC125AQDRG4Q1 from Texas Instruments is an automotive-qualified quadruple bus buffer gate with 3-state outputs, operating from 1.65V to 3.6V supply, supporting –40°C to 125°C ambient temperature, featuring 4.8ns max propagation delay at 3.3V and 5.5V-tolerant inputs - used in automotive infotainment data routing and ADAS sensor interface level translation.
For engineers reviewing the SN74LVC125AQDRG4Q1 datasheet, SN74LVC125AQDRG4Q1 pinout, SN74LVC125AQDRG4Q1 application, or SN74LVC125AQDRG4Q1 equivalent, key selection criteria include automotive AEC-Q100 qualification, 3.3V/5V mixed-voltage interface capability, 14-pin SOIC package thermal performance (RθJA = 127.8°C/W), and guaranteed 3-state output behavior across full temperature range.
Technical Context
This device implements four independent noninverting buffers, each with dedicated active-low output-enable control. Each buffer transitions to high-impedance state when its OE input is high, enabling bidirectional bus control without external logic.
Input voltage tolerance up to 5.5V allows direct interfacing with legacy 5V logic while powered from 3.3V or lower supplies; output drive strength is specified at ±24mA at 3V, with ground bounce (VOLP) <0.8V and undershoot (VOHV) >2V at VCC = 3.3V, ensuring signal integrity in noisy automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.65V to 3.6V - enables operation across wide automotive rail tolerances including cold-crank scenarios. |
| Operating Temperature | –40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and cabin electronics. |
| Max Propagation Delay | 4.8ns at 3.3V - supports high-speed data transfer in CAN FD gateway modules and display timing interfaces. |
| Input Voltage Range | 0V to 5.5V - permits safe connection to 5V microcontrollers or sensors without level-shifting circuitry. |
| Output Drive Strength | ±24mA at 3V - sufficient to drive 50Ω transmission lines or multiple CMOS loads in distributed ECUs. |
| ESD Rating | ±2000V HBM - meets automotive system-level ESD robustness requirements per ISO 10605. |
| Power Dissipation | 500mW at TA ≤ 125°C - supports continuous operation in sealed junction boxes with limited airflow. |
Pinout & Package
SN74LVC125AQDRG4Q1 is supplied in a 14-pin SOIC (D) package measuring 8.65mm × 6mm (body: 8.65mm × 3.91mm), with standard lead pitch of 1.27mm and maximum height of 1.75mm. Thermal resistance is 127.8°C/W (junction-to-ambient).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 4OE, 3OE, 2OE | Active-low output enable | Individually disables corresponding buffer output to high-Z; tie to VCC via pullup for power-up safety. |
| 1A–4A | Buffer input | Noninverting data inputs accepting 0–5.5V; compatible with 3.3V and 5V logic families. |
| 1Y–4Y | Buffer output | 3-state outputs with rail-to-rail swing; capable of sourcing/sinking ±24mA at 3V. |
| VCC (Pin 14) | Positive supply | Primary power rail; requires local 0.1μF bypass capacitor placed adjacent to pin. |
| GND (Pin 7) | Ground reference | Common return path for all signals and supply current; must connect to low-impedance ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Grade 1 certification ensures reliability for automotive powertrain, chassis, and body control modules. |
| 5.5V-tolerant inputs | Eliminates need for external level shifters when interfacing 5V sensors or legacy MCUs with 3.3V domain. |
| Low ground bounce | VOLP <0.8V at 3.3V ensures stable reference during simultaneous switching of multiple outputs. |
| Fast enable/disable timing | ten ≤ 7ns and tdis ≤ 6.5ns at 3.3V enables precise bus arbitration in time-critical communication paths. |
| Latch-up immunity | Exceeds 250mA per JESD17 - prevents destructive latch-up during transient overvoltage events in vehicle electrical systems. |
Applications
| Automotive Infotainment Data Bus | ADAS Sensor Interface Level Translation |
|---|---|
Use Scenario: Routing parallel video or audio data between 3.3V SoC and 5V display controller in head-unit systems. IC Role / Device Role / Timing Role: Bidirectional bus buffer isolating voltage domains while preserving signal timing integrity. Use Value: Enables direct connection without discrete level shifters, reducing BOM count and PCB area by 30% versus discrete solutions. | Use Scenario: Interfacing 5V radar preprocessor outputs to 3.3V ADAS domain controller inputs. IC Role / Device Role / Timing Role: Input-tolerant buffer providing clean, low-jitter signal transfer with sub-5ns propagation delay. Use Value: Maintains timing margin for real-time object detection algorithms by limiting skew to <1.5ns across all four channels. |
| Body Control Module I/O Expansion | Electric Power Steering (EPS) Communication Hub |
Use Scenario: Expanding GPIO count on 3.3V MCU to drive multiple 5V-compatible solenoids and relays. IC Role / Device Role / Timing Role: Output driver with 3-state control enabling shared bus access among multiple subsystems. Use Value: Supports hot-plug-safe bus arbitration via independent OE pins, preventing contention during module replacement. | Use Scenario: Consolidating CAN, LIN, and analog sensor signals into unified diagnostic interface within EPS ECU. IC Role / Device Role / Timing Role: Signal conditioning buffer ensuring noise-immune data handoff between isolated voltage domains. Use Value: Reduces conducted emissions by 8dB through controlled edge rates and low-VOLP output switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125AQPWRQ1 | TSSOP-14 package (5.00mm × 6.4mm); RθJA = 150.8°C/W; same electrical specs and AEC-Q100 qualification. | Better suited for space-constrained layouts; higher thermal resistance requires tighter layout control for high-power operation. | Select when board area is constrained and thermal management includes copper pour or forced air. |
| SN74LVC125AWBQARQ1 | WQFN-14 package (3mm × 2.5mm); RθJA = 102.3°C/W; exposed thermal pad requires PCB soldering for optimal performance. | Optimized for thermally demanding under-hood applications; smaller footprint but requires thermal via design. | Select for high-density automotive modules where thermal dissipation and size are both critical. |
Compared with SN74LVC125AQDRG4Q1 (SOIC), the TSSOP variant offers reduced footprint but higher thermal resistance, while the WQFN provides best thermal performance and smallest area - choice depends on layout density, thermal budget, and assembly capability.
Availability
SN74LVC125AQDRG4Q1 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS sensor interfaces, and body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVC125AQDRG4Q1 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 and manufacturing.
The SN74LVC125A-Q1 belongs to TI's automotive logic portfolio, engineered specifically for voltage translation and bus isolation in harsh-temperature vehicle subsystems including powertrain, chassis, and infotainment.
FAQ
What is the maximum supply voltage rating for SN74LVC125AQDRG4Q1?
The absolute maximum supply voltage (VCC) for SN74LVC125AQDRG4Q1 is 6.5V, though recommended operation is strictly limited to 1.65V–3.6V per AEC-Q100 specifications. Exceeding 3.6V risks violating automotive qualification limits and may impact long-term reliability in sustained operation.
Does SN74LVC125AQDRG4Q1 support 5V logic inputs while powered at 3.3V?
Yes, SN74LVC125AQDRG4Q1 accepts input voltages up to 5.5V regardless of VCC level - this 5V-tolerant input capability is explicitly characterized and guaranteed across –40°C to 125°C, enabling seamless integration in mixed-voltage automotive systems without external level shifters.
How does the 3-state output behavior function in SN74LVC125AQDRG4Q1?
Each of the four buffers in SN74LVC125AQDRG4Q1 has a dedicated active-low output-enable (OE) input. When OE is high, the corresponding Y output enters high-impedance state; when OE is low, the Y output follows the A input noninverting. This allows independent control of bus loading and contention avoidance in multi-master architectures.
What thermal considerations apply to SN74LVC125AQDRG4Q1 in automotive under-hood use?
SN74LVC125AQDRG4Q1 in SOIC package has RθJA = 127.8°C/W. At 125°C ambient and 500mW dissipation, junction temperature reaches ~190°C - exceeding safe limit. Derating is required: maximum continuous power drops to ~220mW at 125°C ambient, necessitating careful PCB copper area and airflow planning in enclosed enclosures.
Is SN74LVC125AQDRG4Q1 pin-compatible with non-automotive versions like SN74LVC125A?
Yes, SN74LVC125AQDRG4Q1 shares identical pinout, electrical characteristics, and functional behavior with SN74LVC125A, differing only in AEC-Q100 qualification testing, enhanced process controls, and automotive-specific screening - making it a drop-in replacement where automotive reliability is mandated.
SN74LVC125AQDRG4Q1 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:
- Discontinued at Digi-Key
- 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
SN74LVC125AQDRG4Q1 FAQ
1.How can I place an order for SN74LVC125AQDRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC125AQDRG4Q1 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 SN74LVC125AQDRG4Q1 reliable?
The price and inventory of SN74LVC125AQDRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC125AQDRG4Q1 is usually 5 days.
3.What payment methods are accepted for SN74LVC125AQDRG4Q1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC125AQDRG4Q1 transactions.
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4.How is shipping managed for SN74LVC125AQDRG4Q1?
SN74LVC125AQDRG4Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC125AQDRG4Q1 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 SN74LVC125AQDRG4Q1?
For technical support, including SN74LVC125AQDRG4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC125AQDRG4Q1 requirements.
6.How does Aetrix verify that SN74LVC125AQDRG4Q1 is sourced from the original manufacturer or authorized distributors?
All SN74LVC125AQDRG4Q1 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 SN74LVC125AQDRG4Q1 meets industry standards.
7.What is the process for return or replacement of SN74LVC125AQDRG4Q1?
All SN74LVC125AQDRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC125AQDRG4Q1, 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 SN74LVC125AQDRG4Q1 part is unused and in its original packaging.
Return procedure for SN74LVC125AQDRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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