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Texas Instruments 74LVC1G126DBVTE4
- Part No.:
- 74LVC1G126DBVTE4
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
74LVC1G126DBVTE4.pdf
- Description:
- IC BUF NON-INVERT 5.5V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,836
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Product details
Overview
74LVC1G126DBVTE4 from Texas Instruments is a single 3-state non-inverting bus buffer gate in SOT-23-5 (DBV) package, supporting 1.65–5.5V VCC, 5.5V-tolerant inputs, ±24mA output drive at 3.3V, and 3.7ns max propagation delay. It enables bidirectional data isolation in low-voltage digital interfaces such as FPGA I/O expansion and microcontroller peripheral multiplexing.
For engineers reviewing the 74LVC1G126DBVTE4 datasheet, 74LVC1G126DBVTE4 pinout, 74LVC1G126DBVTE4 application, or 74LVC1G126DBVTE4 equivalent, key selection criteria include 3-state control timing (ten/tdis ≤ 5.5ns), Ioff support for live insertion, overvoltage-tolerant inputs up to 5.5V, and NanoFree™ packaging for space-constrained PCB layouts.
Technical Context
The 74LVC1G126DBVTE4 implements a CMOS-based non-inverting buffer with active-high output-enable (OE) control, where Y = A when OE = HIGH and Y = high-impedance when OE = LOW. Its balanced push-pull output stage supports symmetrical sourcing/sinking capability across the full 1.65–5.5V supply range.
It features Ioff protection enabling partial power-down operation, input clamp diodes for ESD robustness (2000V HBM), and overvoltage-tolerant inputs that accept up to 5.5V independent of VCC. The device operates from –40°C to +125°C and meets JESD78 Class II latch-up immunity (>100mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 5.5V - Enables interoperability between 1.8V, 2.5V, 3.3V, and 5V logic domains |
| Input Voltage Tolerance | Up to 5.5V - Allows direct connection to higher-voltage buses without level-shifting |
| tpd (max) | 3.7ns at VCC = 3.3V, CL = 15pF - Supports >200MHz data rates in short-trace applications |
| IOH/IOL | ±24mA at VCC = 3.3V - Drives moderate capacitive loads (≤50pF) and fan-out of ≥10 LVC gates |
| ICC (max) | 10μA - Enables ultra-low static power in battery-backed or always-on subsystems |
| Ioff | ±10μA at VCC = 0V - Prevents back-drive current during hot-swap or partial power-down |
| Operating Temperature | –40°C to +125°C - Qualified for industrial and extended-temperature embedded systems |
Pinout & Package
SOT-23-5 (DBV) package: 2.9mm × 2.8mm footprint, 1.6mm body width, 1.3mm height, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OE | Active-high output enable input | Drives Y into high-Z when LOW; requires pull-down or controlled logic to prevent floating during power-up |
| 2 - A | Data input | Non-inverting input accepting 0–5.5V; must be terminated to VCC or GND if unused |
| 3 - GND | Ground reference | Return path for all currents; requires low-inductance connection to system ground plane |
| 4 - Y | 3-state buffered output | True replica of A when OE = HIGH; floats when OE = LOW - may require external pull-up/down for defined idle state |
| 5 - VCC | Power supply | Supplies internal logic and output drivers; requires local 0.1μF ceramic bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| NanoFree™ packaging | Eliminates leadframe - reduces package size by 40% vs standard SOT-23 and enables direct die attach on PCB |
| Down-translation capability | Accepts 5.5V inputs while operating at 1.65V VCC, enabling seamless interfacing with legacy 5V peripherals |
| Live-insertion support | Ioff limits leakage to ±10μA when VCC = 0V, preventing bus contention during hot-plug operations |
| ESD robustness | 2000V HBM and 1000V CDM ratings - exceeds JEDEC JS-001/JS-002 requirements for automated assembly |
| Latch-up immunity | >100mA per JESD78 Class II - ensures reliability in noisy industrial environments with transient coupling |
Applications
| Industrial Motor Control | FPGA I/O Expansion |
|---|---|
Use Scenario: Isolating encoder feedback signals from high-noise PWM-driven motor drivers in servo amplifiers. IC Role / Device Role / Timing Role: 3-state buffer isolates position data lines during fault conditions or configuration updates. Use Value: Prevents bus contention when multiple encoders share a common data bus; Ioff blocks back-drive during controller reset. |
Use Scenario: Expanding limited FPGA GPIO count to drive external ADCs, DACs, and sensors in compact edge nodes. IC Role / Device Role / Timing Role: Non-inverting buffer with fast tpd (≤3.7ns) preserves signal integrity across 50pF trace loads. Use Value: Enables reliable 100+ MHz SPI/I²C clock distribution without added skew or jitter from passive termination. |
| Video Infrastructure Transcoders | SSD Internal Signal Routing |
Use Scenario: Managing parallel video data lanes (e.g., BT.656/1120) between FPGA-based scalers and multi-format encoders. IC Role / Device Role / Timing Role: Bus buffer provides clean enable-controlled signal gating for format switching. Use Value: 5.5V-tolerant inputs accept legacy video sync signals; ±24mA drive sustains signal levels across 10cm PCB traces. |
Use Scenario: Isolating NAND flash command/address lines from host controller during power-state transitions in M.2 SSD modules. IC Role / Device Role / Timing Role: 3-state gate decouples flash interface during suspend/resume cycles. Use Value: Ioff prevents current leakage into unpowered flash banks; 125°C rating supports thermal throttling in dense storage stacks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G125DBVTE4 | Inverting logic (Y = NOT A); identical electrical specs, pinout, and package | Requires logic inversion in signal path - unsuitable where polarity must be preserved | Select only when system-level inversion is acceptable or required |
| 74LVC1G126DCKTE4 | Same function and specs, but in SC70-5 (DCK) package: 2.0mm × 2.1mm, 1.25mm body width | Smaller footprint than DBV but lower thermal resistance (RθJA = 371°C/W vs 357°C/W) - less suitable for sustained 24mA loads | Prefer for ultra-dense layouts where board area is critical and peak drive is intermittent |
Compared with SN74LVC1G125DBVTE4, the 74LVC1G126DBVTE4 preserves signal polarity essential for timing-critical control paths; compared with 74LVC1G126DCKTE4, its larger DBV package offers better thermal performance under continuous 24mA output loading.
Availability
74LVC1G126DBVTE4 is available at Aetrix Electronics and suitable for industrial motor control, FPGA I/O expansion, video infrastructure transcoders, and SSD internal signal routing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74LVC1G126DBVTE4 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 logic solutions, with decades of experience in high-reliability industrial and automotive-grade components.
The SN74LVC1G126 belongs to TI's LVC (Low-Voltage CMOS) logic family, designed specifically for voltage-flexible, low-power, high-speed digital interfacing in space- and power-constrained embedded systems.
FAQ
What is the maximum input voltage the 74LVC1G126DBVTE4 can tolerate?
The 74LVC1G126DBVTE4 accepts input voltages up to 5.5V regardless of VCC level - a feature called overvoltage tolerance. This allows direct connection to 5V buses while operating at 1.65V–3.3V supplies. Exceeding 5.5V violates Absolute Maximum Ratings and risks permanent damage, even briefly.
Does the 74LVC1G126DBVTE4 support hot-swap or live insertion?
Yes, the 74LVC1G126DBVTE4 supports live insertion via its Ioff feature: when VCC = 0V, leakage current at all I/O pins is limited to ±10μA, preventing back-drive current into powered circuitry. This enables safe insertion into partially powered backplanes or modular systems without disrupting bus operation.
What is the recommended bypass capacitor for the 74LVC1G126DBVTE4?
A 0.1μF ceramic capacitor placed as close as possible between VCC and GND pins is recommended for the 74LVC1G126DBVTE4. For improved noise rejection across frequencies, TI advises paralleling it with a 1μF capacitor. Both must use short, wide traces to minimize inductance and ensure effective high-frequency decoupling.
Can unused inputs on the 74LVC1G126DBVTE4 be left floating?
No - unused inputs on the 74LVC1G126DBVTE4 must be tied to either VCC or GND. Floating CMOS inputs cause excessive power consumption, oscillation, and potential device malfunction due to undefined logic states. A 10kΩ pull-up or pull-down resistor is recommended if direct connection isn't feasible.
What is the difference between 74LVC1G126DBVTE4 and 74LVC1G126DCKTE4?
The 74LVC1G126DBVTE4 and 74LVC1G126DCKTE4 share identical logic function, electrical specifications, and pin assignment, but differ in package: DBV is SOT-23-5 (2.9mm × 2.8mm), while DCK is SC70-5 (2.0mm × 2.1mm). The DBV variant offers lower thermal resistance (357°C/W vs 371°C/W), making it preferable for sustained high-current operation.
74LVC1G126DBVTE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
74LVC1G126DBVTE4 FAQ
1.How can I place an order for 74LVC1G126DBVTE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC1G126DBVTE4 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 74LVC1G126DBVTE4 reliable?
The price and inventory of 74LVC1G126DBVTE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC1G126DBVTE4 is usually 5 days.
3.What payment methods are accepted for 74LVC1G126DBVTE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC1G126DBVTE4 transactions.
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4.How is shipping managed for 74LVC1G126DBVTE4?
74LVC1G126DBVTE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC1G126DBVTE4 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 74LVC1G126DBVTE4?
For technical support, including 74LVC1G126DBVTE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC1G126DBVTE4 requirements.
6.How does Aetrix verify that 74LVC1G126DBVTE4 is sourced from the original manufacturer or authorized distributors?
All 74LVC1G126DBVTE4 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 74LVC1G126DBVTE4 meets industry standards.
7.What is the process for return or replacement of 74LVC1G126DBVTE4?
All 74LVC1G126DBVTE4 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC1G126DBVTE4, 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 74LVC1G126DBVTE4 part is unused and in its original packaging.
Return procedure for 74LVC1G126DBVTE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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