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Texas Instruments SN74LVC126AQPWRQ1
- Part No.:
- SN74LVC126AQPWRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC126AQPWRQ1.pdf
- Description:
- IC BUF NON-INVERT 3.6V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,350
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Product details
Overview
SN74LVC126AQPWRQ1 from Texas Instruments is an automotive-qualified quadruple bus buffer gate with independent 3-state outputs, operating from 1.65V to 3.6V supply, supporting 5.5V-tolerant inputs, delivering ≤4.7ns propagation delay at 3.3V, and rated for –40°C to +125°C ambient operation - used in automotive infotainment data routing and body control module signal conditioning.
For engineers reviewing the SN74LVC126AQPWRQ1 datasheet, SN74LVC126AQPWRQ1 pinout, SN74LVC126AQPWRQ1 application, or SN74LVC126AQPWRQ1 equivalent, key selection criteria include 3-state output timing (tpd ≤ 5.7ns, ten ≤ 5.7ns), input voltage tolerance (up to 5.5V), latch-up immunity (>250mA), ESD robustness (±2000V HBM), and AEC-Q100 Grade 1 qualification for automotive deployment.
Technical Context
This device implements four independent non-inverting buffers, each with dedicated active-high output-enable (OE) control enabling precise per-channel bus isolation. Each buffer supports mixed-voltage translation between 3.3V logic domains and legacy 5V systems due to 5.5V-tolerant inputs and 1.65V–3.6V VCC compatibility.
Its 3-state architecture ensures high-impedance outputs when OE is low, minimizing bus contention in shared-data-path applications. Ground-bounce (VOLP < 0.8V) and undershoot (VOHV > 2V) are characterized at 3.3V/25°C, confirming signal integrity under fast switching in automotive power environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - enables direct integration into 2.5V/3.3V automotive subsystems without level-shifting. |
| Input Voltage Tolerance | Up to 5.5V - allows safe interfacing with 5V microcontrollers or sensors without external clamping. |
| Max Propagation Delay | 4.7ns at 3.3V - supports high-speed data transfer in CAN/LIN gateway buffering and display interface timing-critical paths. |
| Output Drive Strength | ±24mA at 3V - sufficient to drive 50pF loads across PCB traces in distributed automotive ECUs. |
| Operating Temperature | –40°C to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood and cabin electronics. |
| ESD Rating | ±2000V HBM - exceeds automotive ESD immunity standards for assembly and field reliability. |
| Latch-up Immunity | >250mA per JESD17 - prevents destructive failure during transient overvoltage events in vehicle electrical systems. |
Pinout & Package
SN74LVC126AQPWRQ1 is available in PW (TSSOP-14) package: 5mm × 6.4mm body size, 0.65mm lead pitch, 1.2mm max height, with exposed thermal pad requiring connection to PCB ground plane via multiple vias for thermal stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | 1OE / 2OE / 3OE / 4OE | Active-high output enable controls - each independently disables its respective buffer output to high-impedance state. |
| 2, 5, 9, 12 | 1A / 2A / 3A / 4A | Buffer input terminals - accept 5.5V-tolerant logic signals regardless of VCC level (1.65V–3.6V). |
| 3, 6, 8, 11 | 1Y / 2Y / 3Y / 4Y | Non-inverting buffered outputs - drive downstream logic with rail-to-rail swing (0V to VCC) and ±24mA capability. |
| 7 | GND | Ground reference - must be connected to system ground; thermal pad tied to internal PCB ground plane. |
| 14 | VCC | Power supply pin - requires local 0.1µF bypass capacitor placed adjacent to pin for noise suppression. |
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 | Enables seamless 3.3V ↔ 5V logic translation without external components in mixed-voltage domains. |
| Low Ground Bounce | VOLP < 0.8V at VCC = 3.3V - reduces noise coupling into sensitive analog or RF sections on same PCB. |
| Fast 3-State Enable/Disable | ten ≤ 5.7ns, tdis ≤ 6.0ns at 3.3V - minimizes bus turnaround time in bidirectional communication interfaces. |
| High Noise Immunity | VIH/VIL thresholds scale with VCC (e.g., VIH = 0.65×VCC at 1.65V) - ensures reliable operation across full supply range. |
Applications
| Automotive Infotainment Data Routing | Body Control Module Signal Conditioning |
|---|---|
|
Use Scenario: Isolating and buffering I²C/SPI signals between head unit MCU and display/touch controller ICs in vehicles. IC Role / Device Role / Timing Role: Quad buffer provides independent channel control for clock/data lines, with 3-state outputs preventing bus contention during hot-plug events. Use Value: 4.7ns tpd and 5.5V-tolerant inputs eliminate need for discrete level shifters, reducing BOM count and layout area in space-constrained dashboards. |
Use Scenario: Driving LED indicators, relay drivers, and sensor interface lines in door modules and lighting control units. IC Role / Device Role / Timing Role: Acts as a configurable signal conditioner - OE pins allow software-controlled activation/deactivation of individual outputs. Use Value: ±24mA drive strength directly drives LEDs or small relays; AEC-Q100 qualification ensures long-term reliability in harsh cabin environments. |
| ADAS Camera Interface Buffering | Gateway ECU Bus Isolation |
|
Use Scenario: Buffering parallel camera sensor data lanes (e.g., MIPI D-PHY clock/data pairs) before serialization in surround-view systems. IC Role / Device Role / Timing Role: Provides matched propagation delay across channels and low VOLP to preserve signal integrity at multi-MHz pixel rates. Use Value: ≤1ns skew between channels and <0.8V ground bounce maintain eye diagram margins required for error-free image transmission. |
Use Scenario: Isolating diagnostic (UDS) and firmware update traffic between main ECU and sub-nodes in domain controller architectures. IC Role / Device Role / Timing Role: Functions as a directionally controlled bus switch - OE pins synchronized to protocol handshaking for clean data handoff. Use Value: 3.6V VCC max and –40°C to +125°C rating support operation in high-temp engine bay gateways; latch-up immunity prevents failure during load-dump transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125AQPWRQ1 | Active-low OE inputs instead of active-high; otherwise identical electrical specs and pinout. | Requires inverted enable logic in host MCU firmware or external inverter; unsuitable where OE polarity must match existing design. | Select only if system-level enable signaling is inverted or can be reconfigured in software. |
| SN74LVCH126AQDRQ1 | Includes bus-hold circuitry on all inputs; higher ICC (max 40μA vs. 20μA); same VCC range and temperature grade. | Eliminates need for external pull-up/down resistors on unused inputs but increases static current in always-on modules. | Prefer when floating input prevention is critical and power budget allows +20μA quiescent current increase. |
Compared with SN74LVC126AQPWRQ1, SN74LVC125AQPWRQ1 requires OE logic inversion and SN74LVCH126AQDRQ1 adds bus-hold functionality at higher ICC - both share identical timing, drive strength, and AEC-Q100 qualification but differ in enable polarity and input biasing strategy.
Availability
SN74LVC126AQPWRQ1 is available at Aetrix Electronics and suitable for automotive infotainment systems, body control modules, and ADAS camera interfaces requiring stable component supply across extended product lifecycles.
Supply support for SN74LVC126AQPWRQ1 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 decades of automotive qualification expertise.
SN74LVC126AQPWRQ1 belongs to TI's LVC logic family designed specifically for low-voltage, high-speed, AEC-Q100-compliant automotive signal routing - balancing speed, power efficiency, and robustness in safety-critical systems.
FAQ
What is the maximum input voltage rating for SN74LVC126AQPWRQ1?
The SN74LVC126AQPWRQ1 supports input voltages up to 5.5V regardless of VCC level - verified per absolute maximum ratings and confirmed in Section 4.1 of the datasheet. This allows direct interfacing with 5V peripherals while operating from 1.65V–3.6V supplies. The SN74LVC126AQPWRQ1 input structure includes built-in protection diodes rated for this voltage range, eliminating need for external clamping in most automotive use cases.
Does SN74LVC126AQPWRQ1 support AEC-Q100 qualification, and what grade is it rated for?
Yes, SN74LVC126AQPWRQ1 is fully AEC-Q100 qualified to Grade 1 (–40°C to +125°C ambient), as stated in the device description and confirmed in the "Features" section. This qualification covers stress testing for temperature cycling, humidity, ESD, and latch-up per JESD22 and JESD17 standards - making SN74LVC126AQPWRQ1 suitable for engine compartment, chassis, and ADAS applications where extended temperature operation is mandatory.
What are the recommended bypass capacitor values for SN74LVC126AQPWRQ1?
Texas Instruments recommends a 0.1µF ceramic capacitor placed as close as possible to the VCC pin (Pin 14) of SN74LVC126AQPWRQ1, per Section 7.1 of the datasheet. For multi-VCC designs (not applicable here, as SN74LVC126AQPWRQ1 has single VCC), smaller values like 0.01µF or 0.022µF may be used per pin - but SN74LVC126AQPWRQ1 requires only one 0.1µF cap. This minimizes power supply noise and stabilizes switching transients during 3-state transitions.
Can SN74LVC126AQPWRQ1 be used as a level shifter between 3.3V and 5V logic domains?
Yes, SN74LVC126AQPWRQ1 functions as a unidirectional level shifter: its 5.5V-tolerant inputs accept 5V signals while operating from a 3.3V VCC, and its outputs swing rail-to-rail (0V to 3.3V). This enables safe 5V→3.3V translation without external components. However, it does not support 3.3V→5V translation since outputs cannot exceed VCC - so SN74LVC126AQPWRQ1 is appropriate only for down-shifting in mixed-voltage automotive subsystems.
What is the thermal pad requirement for the PW (TSSOP-14) package of SN74LVC126AQPWRQ1?
The PW package of SN74LVC126AQPWRQ1 does not include an exposed thermal pad - only the BQA (WQFN-14) variant features a thermal pad requiring connection to PCB ground. The PW package relies on standard lead-frame conduction; no thermal pad soldering or via placement is needed. Thermal performance data (RθJA = 150.8°C/W) assumes standard JEDEC PCB mounting conditions without additional thermal enhancements.
SN74LVC126AQPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-TSSOP
SN74LVC126AQPWRQ1 FAQ
1.How can I place an order for SN74LVC126AQPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC126AQPWRQ1 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 SN74LVC126AQPWRQ1 reliable?
The price and inventory of SN74LVC126AQPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC126AQPWRQ1 is usually 5 days.
3.What payment methods are accepted for SN74LVC126AQPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC126AQPWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC126AQPWRQ1?
SN74LVC126AQPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC126AQPWRQ1 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 SN74LVC126AQPWRQ1?
For technical support, including SN74LVC126AQPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC126AQPWRQ1 requirements.
6.How does Aetrix verify that SN74LVC126AQPWRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74LVC126AQPWRQ1 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 SN74LVC126AQPWRQ1 meets industry standards.
7.What is the process for return or replacement of SN74LVC126AQPWRQ1?
All SN74LVC126AQPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC126AQPWRQ1, 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 SN74LVC126AQPWRQ1 part is unused and in its original packaging.
Return procedure for SN74LVC126AQPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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