My Inquiry
My Account
Texas Instruments SN74LVC126AQDRQ1
- Part No.:
- SN74LVC126AQDRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74LVC126AQDRQ1.pdf
- Description:
- IC BUF NON-INVERT 3.6V 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,310
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LVC126AQDRQ1 from Texas Instruments is an automotive-qualified quadruple bus buffer gate with 3-state outputs, designed for 1.65V–3.6V VCC operation and 5.5V-tolerant inputs. It delivers 4.7ns max propagation delay at 3.3V, supports –40°C to +125°C operation, and features latch-up immunity >250mA per JESD17 - used in automotive infotainment data buses and ADAS sensor interface level-shifting.
For engineers reviewing the SN74LVC126AQDRQ1 datasheet, SN74LVC126AQDRQ1 pinout, SN74LVC126AQDRQ1 application, or SN74LVC126AQDRQ1 equivalent, key selection criteria include 3-state output control timing (ten/tdis ≤ 6.7ns), ground-bounce (VOLP < 0.8V) and undershoot (VOHV > 2V) performance at 3.3V, and AEC-Q100 Grade 1 qualification for under-hood signal routing.
Technical Context
This device implements four independent CMOS buffer channels, each with dedicated active-high output-enable (OE) control enabling precise bus isolation. Each channel operates as a non-inverting driver with high-impedance (Z) state activated when OE = low.
Input voltage tolerance up to 5.5V allows direct interfacing with legacy 5V logic while powered from 3.3V or lower rails, making it suitable for mixed-voltage domain translation in automotive body control modules and gateway ECUs without external level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - enables compatibility with modern low-voltage microcontrollers and legacy 3.3V systems |
| Input Voltage Tolerance | Up to 5.5V - permits direct connection to 5V peripherals without clamping diodes or external protection |
| Max Propagation Delay | 4.7ns at 3.3V - ensures sub-5ns timing margin for high-speed digital control loops in real-time automotive subsystems |
| Output Drive Strength | ±24mA at 3V - sufficient to drive 50pF loads across PCB traces and connectors in distributed vehicle networks |
| Operating Temperature | –40°C to +125°C - meets AEC-Q100 Grade 1 requirements for engine bay and powertrain applications |
| Latch-up Immunity | >250mA per JESD17 - guarantees robustness against transient current surges during ESD events or supply glitches |
| ESD Rating | ±2000V HBM - exceeds automotive system-level ESD immunity requirements per ISO 10605 |
Pinout & Package
SN74LVC126AQDRQ1 is packaged in a 14-pin SOIC (D package), 8.65mm × 6mm body size, with exposed pad not present. Pin 7 is GND and Pin 14 is VCC; all four OE inputs are active-high and independently control corresponding A→Y buffers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 (1OE–4OE) | Input | Active-high enable for respective buffer channel - tie low for high-Z output; pulldown recommended at power-up |
| 2, 5, 9, 12 (1A–4A) | Input | Non-inverting data input per channel - accepts 0–5.5V signals regardless of VCC |
| 3, 6, 8, 11 (1Y–4Y) | Output | 3-state buffered output - high-Z when OE = low; drives rail-to-rail between GND and VCC when enabled |
| 7 (GND) | Power | Ground reference for all logic and output stages - must be low-impedance connection to system ground plane |
| 14 (VCC) | Power | Supply rail for internal logic and output drivers - requires local 0.1µF ceramic bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Grade 1 (–40°C to +125°C) - certified for automotive powertrain, chassis, and ADAS applications |
| 5.5V-Tolerant Inputs | Operates with 5V logic inputs while powered from 1.65–3.6V - eliminates need for discrete level translators |
| Low Ground Bounce | VOLP < 0.8V at VCC = 3.3V - minimizes noise coupling into shared ground paths in dense automotive PCBs |
| Fast Enable/Disable | ten/tdis ≤ 6.7ns at 3.3V - enables rapid bus arbitration and dynamic channel switching in multiplexed communication links |
| High Noise Immunity | VIH/VIL thresholds scale with VCC - maintains consistent logic margins across full supply range |
Applications
| Automotive Infotainment Data Bus | ADAS Sensor Interface |
|---|---|
Use Scenario: Isolating and buffering I²C or SPI signals between head unit SoC (3.3V) and legacy display controllers (5V). IC Role / Device Role / Timing Role: Level-translating bus buffer with independent 3-state control per channel to prevent contention during hot-plug detection. Use Value: Eliminates external voltage translators while maintaining <4.7ns propagation delay and AEC-Q100 compliance for cabin electronics. |
Use Scenario: Driving LVDS or parallel video data lines from camera module to image processor in surround-view systems. IC Role / Device Role / Timing Role: High-speed, low-noise buffer with controlled output enable sequencing to suppress switching noise during frame sync transitions. Use Value: Reduces ground bounce (VOLP < 0.8V) and undershoot (VOHV > 2V), improving signal integrity on long flex cables. |
| Body Control Module (BCM) Gateway | Electric Power Steering (EPS) ECU |
Use Scenario: Interfacing LIN transceivers (5V) with 3.3V microcontroller GPIOs in door module controllers. IC Role / Device Role / Timing Role: Bidirectional voltage-tolerant buffer enabling reliable wake-up signaling and diagnostic response over shared bus lines. Use Value: Supports 5.5V input tolerance and ±24mA drive strength to meet LIN physical layer load requirements without additional components. |
Use Scenario: Buffering PWM motor control signals from MCU to gate drivers in high-reliability EPS actuation circuits. IC Role / Device Role / Timing Role: Precision timing buffer with <6.7ns enable/disable latency to synchronize torque command updates across dual-motor configurations. Use Value: Ensures deterministic signal routing with latch-up immunity >250mA, critical for functional safety (ISO 26262 ASIL-B) compliance. |
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 (1OE–4OE inverted); otherwise identical electrical specs and packaging | Requires inverted enable logic from host MCU - unsuitable where OE polarity must match existing firmware | Select only if system design uses active-low enable signals and layout accommodates same pinout |
| SN74LVCH126A-Q1 | Includes bus-hold circuitry on all inputs; higher ICC (max 40μA vs. 20μA); same VCC, timing, and AEC-Q100 rating | Eliminates external pull-up/down resistors on unused inputs - beneficial in space-constrained modules with floating pins | Prefer when input stability without external biasing is required; verify bus-hold current impact on signal rise time |
Compared with SN74LVC126AQDRQ1, SN74LVC125A-Q1 requires OE logic inversion and SN74LVCH126A-Q1 adds bus-hold functionality at slightly higher quiescent current - both share identical 14-pin SOIC packaging and automotive qualification but differ in enable polarity and input handling architecture.
Availability
SN74LVC126AQDRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS sensor interfaces, and body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVC126AQDRQ1 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 broad portfolio of AEC-Q100 qualified products.
The SN74LVC126AQDRQ1 belongs to TI's LVC logic family, engineered specifically for automotive signal integrity, voltage translation, and bus isolation in harsh environments - targeting powertrain, chassis, and advanced driver-assistance systems.
FAQ
What is the maximum operating voltage for SN74LVC126AQDRQ1 inputs?
The SN74LVC126AQDRQ1 inputs tolerate up to 5.5V regardless of VCC level, enabling direct interfacing with 5V logic devices while operating from 1.65V–3.6V supplies. This specification is verified per absolute maximum ratings and confirmed in Section 4.1 of the official datasheet, with no derating required across the full temperature range.
Does SN74LVC126AQDRQ1 support AEC-Q100 qualification?
Yes, SN74LVC126AQDRQ1 is explicitly qualified to AEC-Q100 Grade 1 standards (–40°C to +125°C), with test reports covering HTOL, TC, UHAST, and ESD per JESD22-A114. This qualification is documented in the device folder and product change notifications, confirming suitability for automotive powertrain and chassis applications.
What is the typical propagation delay of SN74LVC126AQDRQ1 at 3.3V?
The typical propagation delay (tpd) of SN74LVC126AQDRQ1 is 4.7ns at VCC = 3.3V, TA = 25°C, as specified in Section 4.6 Switching Characteristics. This value applies to A→Y transitions under 50pF load and 500Ω termination, and remains within 6.2ns maximum across full operating conditions.
How should unused inputs be handled on SN74LVC126AQDRQ1?
All unused inputs on SN74LVC126AQDRQ1 must be tied to VCC or GND to prevent floating states that cause increased ICC and potential logic instability. TI recommends using pullup/pulldown resistors (e.g., 10kΩ) - guidance is provided in Section 7.2.1 Layout Guidelines and application report SCBA004.
Is SN74LVC126AQDRQ1 available in packages other than SOIC?
Yes, SN74LVC126AQDRQ1 is also offered in TSSOP (PW) and WQFN (BQA) packages, as confirmed in Section 2 and Table 10-1 of the datasheet. The SOIC variant (D package) is identified by orderable part number SN74LVC126AQDRQ1, while PW and BQA variants use distinct suffixes (e.g., PWRQ1, WBQARQ1).
SN74LVC126AQDRQ1 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
SN74LVC126AQDRQ1 FAQ
1.How can I place an order for SN74LVC126AQDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC126AQDRQ1 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 SN74LVC126AQDRQ1 reliable?
The price and inventory of SN74LVC126AQDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC126AQDRQ1 is usually 5 days.
3.What payment methods are accepted for SN74LVC126AQDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC126AQDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC126AQDRQ1?
SN74LVC126AQDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC126AQDRQ1 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 SN74LVC126AQDRQ1?
For technical support, including SN74LVC126AQDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC126AQDRQ1 requirements.
6.How does Aetrix verify that SN74LVC126AQDRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74LVC126AQDRQ1 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 SN74LVC126AQDRQ1 meets industry standards.
7.What is the process for return or replacement of SN74LVC126AQDRQ1?
All SN74LVC126AQDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC126AQDRQ1, 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 SN74LVC126AQDRQ1 part is unused and in its original packaging.
Return procedure for SN74LVC126AQDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LVC126AQDRQ1 Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
