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Diodes Incorporated 74LVC1G126QSE-7
- Part No.:
- 74LVC1G126QSE-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
74LVC1G126QSE-7.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V SOT353
- Quantity:
- Payment:
- Shipping:
Inventory:18,321
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Product details
Overview
74LVC1G126QSE-7 from Diodes Incorporated is an automotive-grade, single non-inverting buffer with 3-state output, designed for voltage-level shifting and signal isolation in mixed-voltage systems. It operates from 1.65V to 5.5V, supports ±24mA drive at 3.3V, features IOFF partial-power-down protection, and is AEC-Q100 Grade 1 qualified (–40°C to +125°C) for use in automotive body control modules.
For engineers reviewing the 74LVC1G126QSE-7 datasheet, 74LVC1G126QSE-7 pinout, 74LVC1G126QSE-7 application, or 74LVC1G126QSE-7 equivalent, key selection criteria include 3-state enable timing (tEN/tDIS ≤ 7.0 ns at 3.3V), 5.5V-tolerant inputs, IOFF leakage < ±2 µA, and SOT353 package thermal resistance (θJA = 385°C/W).
Technical Context
This device implements a CMOS-based non-inverting buffer with active-HIGH output enable (OE), enabling bidirectional bus control in low-power automotive subsystems. Its IOFF circuitry actively disables both output FETs during power-down, blocking current backflow even when input/output voltages exceed VCC or reach 5.5V.
The logic function follows a simple truth table: OE = HIGH enables Y = A; OE = LOW forces Y into high-impedance (Z). Input thresholds are supply-dependent (VIH = 0.65×VCC min at 1.65V; VIL = 0.35×VCC max), ensuring robust noise immunity across 1.65–5.5V operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.65V to 5.5V - Enables direct interface between 1.8V, 2.5V, 3.3V, and 5V logic domains without level shifters. |
| Input Voltage Tolerance | Up to 5.5V - Allows safe connection of 5V signals to lower-VCC systems (e.g., 1.8V MCU inputs) without external clamping. |
| Output Drive Strength | ±24mA at VCC = 3.0V - Sufficient to drive moderate capacitive loads (e.g., 10–15 pF traces + IC inputs) with <6.0 ns propagation delay. |
| IOFF Leakage Current | ±2 µA max at VCC = 0V - Prevents damaging back-current flow during hot-insertion or partial power-down sequences in automotive ECUs. |
| Propagation Delay (tPD) | 0.5 ns (min) to 6.0 ns (max) at 3.3V - Supports reliable timing in sub-100 MHz digital control paths with predictable setup/hold margins. |
| ESD Robustness | 2000V HBM, 1000V CDM - Meets AEC-Q100 stress requirements for under-hood and cabin electronics assembly environments. |
| Operating Temperature | –40°C to +125°C (Grade 1) - Validated for engine bay, transmission control, and ADAS sensor interface applications. |
Pinout & Package
SOT353 (SC-70-5) package: 2.15 mm × 2.10 mm × 1.10 mm body, 0.65 mm lead pitch, matte tin-plated leads, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output Enable (active HIGH) | Drives output Y to high-impedance state when LOW; must be pulled HIGH (e.g., via 10kΩ to VCC) when unused per datasheet Note 6. |
| 2 (A) | Data Input | Non-inverting input node; accepts 5.5V-tolerant signals regardless of VCC value; internally clamped. |
| 3 (GND) | Ground Reference | Primary return path for all internal logic and output current; requires low-inductance PCB connection to minimize ground bounce. |
| 4 (Y) | 3-State Output | Buffered, non-inverted replica of A when OE = HIGH; enters high-Z state (leakage < ±2 µA) when OE = LOW. |
| 5 (VCC) | Power Supply | Supplies core logic and output drivers; bypass capacitor (100 nF X7R) required within 5 mm of pin per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Grade 1 Automotive Qualification | AEC-Q100 qualified, PPAP capable, manufactured in IATF 16949 certified facilities - meets OEM requirements for safety-critical vehicle subsystems. |
| IOFF Partial-Power-Down Protection | Active shutdown of output FETs at VCC = 0V - eliminates risk of current injection into unpowered rails during system sleep or fault recovery. |
| 5.5V-Tolerant Inputs | VI range –0.5V to 6.5V - enables direct interfacing with legacy 5V sensors or microcontrollers without external resistive dividers or translators. |
| Low Dynamic Power Consumption | CPD = 19 pF (enabled), 3 pF (disabled) at 3.3V - reduces switching noise and total system power in always-on automotive modules. |
| High-Reliability Packaging | SOT353 with matte tin plating, J-STD-020 Level 1 moisture sensitivity - supports standard reflow profiles without baking, ideal for high-volume automotive SMT lines. |
Applications
| Automotive Body Control Module | Industrial PLC I/O Isolation |
|---|---|
|
Use Scenario: Signal buffering between 3.3V CAN transceiver and 5V microcontroller GPIO in door module ECU. IC Role / Device Role / Timing Role: Non-inverting level shifter and enable-controlled signal gate for wake-up line routing. Use Value: Eliminates need for discrete MOSFET level shifter; IOFF prevents backfeed into powered-down CAN PHY during sleep mode. |
Use Scenario: Isolating field-side 24V digital inputs from 3.3V FPGA logic in modular PLC base unit. IC Role / Device Role / Timing Role: 3-state buffer enabling multiplexed input scanning while maintaining signal integrity across voltage domains. Use Value: ±24mA drive ensures clean edge transitions into FPGA input capacitance; 125°C rating supports operation near power supplies. |
| Automotive Infotainment Display Interface | Medical Diagnostic Equipment Data Bus |
|
Use Scenario: Driving LVDS serializer clock enable signal from 1.8V SoC to 3.3V display timing controller. IC Role / Device Role / Timing Role: Low-skew, low-jitter buffer with fast enable/disable (tEN/tDIS ≤ 7 ns) for precise display blanking control. Use Value: Propagation delay variation < 1.5 ns across temperature ensures stable pixel clock gating without frame tearing. |
Use Scenario: Enabling/disabling data path between 5V analog front-end ADC and 3.3V ARM Cortex-M7 processor in portable ultrasound unit. IC Role / Device Role / Timing Role: 3-state bus driver providing galvanic isolation during ADC calibration cycles. Use Value: IOFF leakage < ±2 µA prevents signal corruption during calibration; AEC-Q100 qualification satisfies IEC 60601-1 reliability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G126DBVR | Same logic function, SOT-23-5 package (3.0 × 2.8 mm), θJA = 184°C/W - better thermal performance but larger footprint. | Preferred where board space allows and higher continuous power dissipation is needed (e.g., industrial motor drives). | Select when thermal margin > 20°C is required at 50 mA average output current; verify pad layout compatibility with DBV outline. |
| 74LVC1G125QSE-7 | Inverting buffer variant (Y = NOT A); identical electrical specs, package, and qualification. | Required only when logic inversion is part of the signal chain (e.g., active-low enable translation). | Choose only if system-level timing analysis confirms inversion improves setup/hold timing; otherwise, 74LVC1G126QSE-7 avoids unnecessary logic conversion. |
Compared with SN74LVC1G126DBVR, the 74LVC1G126QSE-7 offers smaller PCB area and lower weight but trades ~200°C/W higher thermal resistance; versus 74LVC1G125QSE-7, it provides non-inverting behavior essential for direct signal pass-through without downstream logic correction.
Availability
74LVC1G126QSE-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O subsystems, and medical diagnostic equipment requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for 74LVC1G126QSE-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and integrated circuits, specializing in high-reliability solutions for automotive, industrial, and computing markets.
The 74LVC logic family targets low-voltage, mixed-signal interface applications requiring wide supply range, 5V tolerance, and AEC-Q100 qualification - specifically engineered for automotive infotainment, ADAS, and powertrain subsystems.
FAQ
Can 74LVC1G126QSE-7 operate with VCC = 1.5V?
No. The recommended minimum operating voltage is 1.65V per DS39798 Rev. 3–2 Section 6. Operation below 1.65V violates specification limits for VIH/VIL thresholds and output drive strength, risking metastability and excessive propagation delay. Data retention mode (1.5V) applies only to static storage, not functional operation.
What is the maximum capacitive load this buffer can drive reliably?
Based on tPD = 6.0 ns max and IO = ±24 mA at 3.3V, the device reliably drives ≤15 pF total load (including trace + input capacitance) while maintaining <10% overshoot and monotonic edges. Exceeding this requires series termination or reduced slew rate via RC filtering at the output.
Is the SOT353 package compatible with standard SMT reflow profiles?
Yes. With J-STD-020 Level 1 moisture sensitivity and matte tin plating, the SOT353 package supports industry-standard lead-free reflow profiles (peak 260°C, 60–90 sec above 217°C) without pre-bake. Diodes' recommended pad layout (2.15 × 2.10 mm, 0.65 mm pitch) ensures coplanarity and solder joint reliability.
Does IOFF protection work when VCC = 0V and OE = HIGH?
Yes. IOFF activates whenever VCC is below ~0.8V, regardless of OE state. When VCC = 0V and OE = HIGH, both output FETs are forcibly turned OFF, limiting leakage to ±2 µA maximum - preventing current flow from A or Y into GND or other powered rails during complete system power-down.
74LVC1G126QSE-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- 74LVC
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 32mA, 32mA
- Voltage - Supply:
- 1.65V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-353
74LVC1G126QSE-7 FAQ
1.How can I place an order for 74LVC1G126QSE-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC1G126QSE-7 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 74LVC1G126QSE-7 reliable?
The price and inventory of 74LVC1G126QSE-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC1G126QSE-7 is usually 5 days.
3.What payment methods are accepted for 74LVC1G126QSE-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC1G126QSE-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC1G126QSE-7?
74LVC1G126QSE-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC1G126QSE-7 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 74LVC1G126QSE-7?
For technical support, including 74LVC1G126QSE-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC1G126QSE-7 requirements.
6.How does Aetrix verify that 74LVC1G126QSE-7 is sourced from the original manufacturer or authorized distributors?
All 74LVC1G126QSE-7 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 74LVC1G126QSE-7 meets industry standards.
7.What is the process for return or replacement of 74LVC1G126QSE-7?
All 74LVC1G126QSE-7 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC1G126QSE-7, 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 74LVC1G126QSE-7 part is unused and in its original packaging.
Return procedure for 74LVC1G126QSE-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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