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Texas Instruments SN74LVC126AQDRG4Q1
- Part No.:
- SN74LVC126AQDRG4Q1
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74LVC126AQDRG4Q1.pdf
- Description:
- IC BUF NON-INVERT 3.6V 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:8,079
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Product details
Overview
SN74LVC126AQDRG4Q1 from Texas Instruments is an automotive-qualified quadruple bus buffer gate with 3-state outputs, designed for 1.65V–3.6V VCC operation, supporting 5.5V-tolerant inputs and delivering ≤4.7ns propagation delay at 3.3V. It enables bidirectional signal isolation in automotive infotainment data buses and ADAS sensor interface modules.
For engineers reviewing the SN74LVC126AQDRG4Q1 datasheet, SN74LVC126AQDRG4Q1 pinout, SN74LVC126AQDRG4Q1 application, or SN74LVC126AQDRG4Q1 equivalent, key selection criteria include 3-state output timing (tpd, ten, tdis), automotive temperature range (–40°C to +125°C), input voltage tolerance (up to 5.5V), and SOIC-14 package compatibility with legacy PCB layouts.
Technical Context
This device implements four independent non-inverting buffers, each with dedicated active-high output-enable (OE) control. Each buffer operates as a level translator between 3.3V logic domains and 5V-tolerant inputs, enabling mixed-voltage system interconnect without external level-shifting circuitry.
All outputs enter high-impedance state when OE is low; power-up/down sequencing is stabilized by tying OE to GND via pulldown resistor. Input clamp diodes and latch-up immunity (>250mA per JESD17) support robust operation in noisy automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - supports dual-supply systems and low-power microcontroller I/O interfaces |
| Input Voltage Tolerance | Up to 5.5V - allows direct connection to 5V legacy peripherals without external clamping |
| Max Propagation Delay | 4.7ns at 3.3V - ensures sub-5ns timing margin for 100MHz+ data bus applications |
| Output Drive Strength | ±24mA at 3.0V - sufficient to drive 50Ω transmission lines or fan-out to ≥10 LVC loads |
| Operating Temperature | –40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and cabin electronics |
| ESD Rating | ±2000V HBM - meets automotive ESD immunity requirements for assembly and field operation |
| Power Dissipation Capacitance | 22pF per enabled gate at 10MHz - enables accurate dynamic power estimation in battery-sensitive designs |
Pinout & Package
SN74LVC126AQDRG4Q1 is supplied in a 14-pin SOIC (D) package measuring 8.65mm × 6.0mm (body: 8.65mm × 3.9mm), with standard 1.27mm pitch and 1.75mm max height. The exposed thermal pad is absent - this is a leaded SOIC variant requiring no thermal pad soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | 1OE, 2OE, 3OE, 4OE | Active-high output enable controls for each of four independent buffers |
| 2, 5, 9, 12 | 1A, 2A, 3A, 4A | Non-inverting input terminals - accept 0–5.5V signals regardless of VCC |
| 3, 6, 8, 11 | 1Y, 2Y, 3Y, 4Y | 3-state buffered outputs - high-Z when corresponding OE is low |
| 7 | GND | Ground reference for all logic and power domains |
| 14 | VCC | Primary supply rail - must be bypassed with 0.1µF ceramic capacitor near pin |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 certified - validated for continuous operation from –40°C to +125°C ambient |
| 5.5V-tolerant inputs | Enables direct interfacing with 5V microcontrollers or sensors without level shifters or resistive dividers |
| Sub-5ns propagation delay | Ensures timing compliance in high-speed parallel buses (e.g., camera sensor data lanes, display interface control) |
| Output ground bounce (VOLP) | <0.8V at VCC = 3.3V - minimizes noise coupling into adjacent analog or RF circuits |
| Latch-up immunity | >250mA per JESD17 - prevents destructive failure during transient overvoltage events in vehicle power systems |
Applications
| Automotive Infotainment Data Bus | ADAS Sensor Interface Hub |
|---|---|
|
Use Scenario: Isolating and buffering parallel data lines between head unit SoC and display/touch controller in a 12V vehicle platform. IC Role / Device Role / Timing Role: Bidirectional 3-state bus buffer enabling shared data bus arbitration and hot-plug-safe signal routing. Use Value: 5.5V-tolerant inputs allow direct connection to legacy display controllers; 4.7ns tpd supports pixel clock synchronization up to 200MHz. |
Use Scenario: Aggregating digital status signals from multiple radar/LiDAR modules into a central domain controller. IC Role / Device Role / Timing Role: Signal-level translator and fan-out buffer for asynchronous sensor alert lines operating across mixed 3.3V/5V subsystems. Use Value: Independent OE pins permit selective activation of sensor channels; –40°C to +125°C rating ensures reliability in engine bay proximity mounting. |
| Body Control Module I/O Expansion | Automotive Gateway CAN Subsystem |
|
Use Scenario: Extending GPIO count on a low-pin-count MCU to manage door lock actuators, mirror controls, and lighting drivers. IC Role / Device Role / Timing Role: Logic-level shifter and buffer for open-drain or push-pull control signals routed through long harnesses. Use Value: ±24mA drive strength sustains signal integrity over 1m+ wire runs; latch-up immunity prevents failure during load dump transients. |
Use Scenario: Isolating diagnostic test access points and firmware update interfaces from primary CAN FD communication paths. IC Role / Device Role / Timing Role: 3-state gate controlling physical-layer access to CAN transceiver configuration pins during bootloader mode. Use Value: High-impedance state eliminates contention during firmware reflash; AEC-Q100 qualification ensures functional safety alignment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125A-Q1 | Quad buffer with active-low OE (1OE̅, 2OE̅, etc.) instead of active-high; identical electrical specs and package options | Requires inverted enable logic from host MCU - unsuitable where OE polarity is fixed in existing firmware | Select SN74LVC125A-Q1 only if system design accommodates active-low enable signaling |
| SN74LVCH126A-Q1 | Includes bus-hold circuitry on all inputs (100kΩ pull-up/pull-down); otherwise matches SN74LVC126AQDRG4Q1 timing and voltage specs | Eliminates need for external pull resistors on unused or floating inputs - reduces BOM count in space-constrained modules | Choose SN74LVCH126A-Q1 when input stability under open-circuit conditions is critical and board area is constrained |
Compared with SN74LVC126AQDRG4Q1, SN74LVC125A-Q1 requires OE signal inversion in firmware, while SN74LVCH126A-Q1 adds bus-hold for floating-input resilience at minor cost premium - both retain AEC-Q100 Grade 1 qualification and SOIC-14 footprint compatibility.
Availability
SN74LVC126AQDRG4Q1 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS sensor hubs, and body control modules requiring stable component supply across extended product lifecycles.
Supply support for SN74LVC126AQDRG4Q1 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 automotive-grade logic solutions with over 50 years of automotive qualification experience.
SN74LVC126AQDRG4Q1 belongs to TI's LVC-Q1 automotive logic family, engineered specifically for reliable signal buffering and voltage translation in harsh-temperature vehicle subsystems.
FAQ
What is the maximum input voltage rating for SN74LVC126AQDRG4Q1?
The SN74LVC126AQDRG4Q1 supports input voltages up to 5.5V regardless of VCC level - a key feature enabling interoperability with 5V peripherals in mixed-voltage automotive systems. This rating is absolute and applies across the full operating temperature range (–40°C to +125°C). Inputs remain tolerant even when VCC is powered down, provided current limits are observed.
Does SN74LVC126AQDRG4Q1 require external pull-up or pull-down resistors on unused inputs?
Yes - all unused inputs of SN74LVC126AQDRG4Q1 must be tied to either VCC or GND to prevent floating states that cause undefined output behavior and increased power consumption. TI recommends using 10kΩ resistors for this purpose. The SN74LVC126AQDRG4Q1 does not include internal bus-hold circuitry, unlike the SN74LVCH126A-Q1 variant.
What is the thermal resistance (RθJA) of SN74LVC126AQDRG4Q1 in its SOIC-14 package?
The junction-to-ambient thermal resistance RθJA for SN74LVC126AQDRG4Q1 in the D (SOIC-14) package is 127.8°C/W, measured under standard JEDEC conditions (1s pulse, 2-layer board, 1-inch² copper). This value assumes proper PCB layout with adequate copper pour and thermal vias near the GND and VCC pins.
Can SN74LVC126AQDRG4Q1 be used as a level translator between 3.3V and 5V logic domains?
Yes - SN74LVC126AQDRG4Q1 functions as a unidirectional level translator: 5V-tolerant inputs accept signals up to 5.5V while outputs swing rail-to-rail between 0V and the applied VCC (1.65V–3.6V). For bidirectional translation, two devices with cross-coupled OE control are required, as SN74LVC126AQDRG4Q1 lacks automatic direction sensing.
Is SN74LVC126AQDRG4Q1 pin-compatible with non-automotive SN74LVC126A variants?
Yes - SN74LVC126AQDRG4Q1 shares identical pinout, package dimensions, and electrical characteristics with commercial-grade SN74LVC126A in SOIC-14 (D) packaging. The Q1 suffix denotes AEC-Q100 qualification and enhanced process controls; no PCB layout changes are needed when upgrading from SN74LVC126A to SN74LVC126AQDRG4Q1.
SN74LVC126AQDRG4Q1 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
SN74LVC126AQDRG4Q1 FAQ
1.How can I place an order for SN74LVC126AQDRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC126AQDRG4Q1 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 SN74LVC126AQDRG4Q1 reliable?
The price and inventory of SN74LVC126AQDRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC126AQDRG4Q1 is usually 5 days.
3.What payment methods are accepted for SN74LVC126AQDRG4Q1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC126AQDRG4Q1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC126AQDRG4Q1?
SN74LVC126AQDRG4Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC126AQDRG4Q1 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 SN74LVC126AQDRG4Q1?
For technical support, including SN74LVC126AQDRG4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC126AQDRG4Q1 requirements.
6.How does Aetrix verify that SN74LVC126AQDRG4Q1 is sourced from the original manufacturer or authorized distributors?
All SN74LVC126AQDRG4Q1 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 SN74LVC126AQDRG4Q1 meets industry standards.
7.What is the process for return or replacement of SN74LVC126AQDRG4Q1?
All SN74LVC126AQDRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC126AQDRG4Q1, 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 SN74LVC126AQDRG4Q1 part is unused and in its original packaging.
Return procedure for SN74LVC126AQDRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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