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Texas Instruments 74LVC2G126DCURG4
- Part No.:
- 74LVC2G126DCURG4
- Manufacturer:
- Texas Instruments
- Package:
- 8-VFSOP (0.091", 2.30mm Width)
- Datasheet:
-
74LVC2G126DCURG4.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,305
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Product details
Overview
74LVC2G126DCURG4 from Texas Instruments is a dual 3-state bus buffer gate optimized for 1.65 V to 5.5 V operation, delivering ±24 mA output drive at 3.3 V, 4 ns max propagation delay, and 5.5 V-tolerant inputs. It enables bidirectional signal isolation in high-speed digital interfaces such as LED drivers, logic level translation, and bus conditioning in industrial control and video infrastructure systems.
For engineers reviewing the 74LVC2G126DCURG4 datasheet, 74LVC2G126DCURG4 pinout, 74LVC2G126DCURG4 application, or 74LVC2G126DCURG4 equivalent, key selection criteria include Ioff-enabled live insertion support, 3-state output timing (tdis/ten ≤ 5.4 ns at 3.3 V), 10 µA max ICC, and VSSOP-8 package compatibility with space-constrained PCB layouts.
Technical Context
The 74LVC2G126DCURG4 implements two independent noninverting buffers, each with dedicated output-enable (OE) control, supporting Boolean function Y = A. Its Ioff circuitry actively disables outputs during partial power-down, blocking back-drive current when VCC = 0 V.
It supports voltage translation across supply domains: inputs accept up to 5.5 V regardless of VCC (e.g., 5 V logic driving 3.3 V or 1.8 V buses), while outputs swing rail-to-rail between GND and VCC. Propagation delay remains stable across –40°C to +125°C, with tpd ≤ 5 ns at 3.3 V over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 5.5 V - Enables interoperability across 1.8 V, 2.5 V, 3.3 V, and 5 V logic domains |
| Max tpd | 4 ns at 3.3 V - Supports >100 MHz signal integrity in high-speed data paths |
| Output Drive | ±24 mA at 3.3 V - Sufficient to drive multiple CMOS loads or low-current LEDs without external amplification |
| Ioff Current | ±10 µA max - Prevents damaging current flow during hot-swap or mixed-voltage system power sequencing |
| Input Tolerance | 5.5 V absolute max - Allows direct interfacing with legacy 5 V peripherals without level-shifter components |
| ESD Rating | 2000 V HBM - Meets industrial-grade robustness requirements per JESD22-A114 |
| Operating Temp | –40°C to +125°C - Qualified for under-hood automotive, motor control, and outdoor video infrastructure |
Pinout & Package
VSSOP-8 (DCU) package: 2.30 mm × 2.00 mm body, 0.5 mm pitch, exposed pad not present, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE | Active-high enable input for Channel 1 | Drives 1Y high-impedance when low; ties to VCC via pulldown resistor for power-up safety |
| 1A | Noninverting data input for Channel 1 | Accepts 0–5.5 V signals; no external clamping required due to integrated protection |
| 1Y | Noninverting 3-state output for Channel 1 | Provides rail-to-rail output swing; sinks/sourcing capability defined by VCC and load |
| 2OE | Active-high enable input for Channel 2 | Independent control allows staggered bus activation or channel-specific isolation |
| 2A | Noninverting data input for Channel 2 | Electrically identical to 1A; supports asynchronous dual-channel buffering |
| 2Y | Noninverting 3-state output for Channel 2 | Enables wired-OR configurations or parallel load sharing when enabled simultaneously |
| GND | Ground reference | Single ground plane required; decoupling capacitor must be placed within 3 mm of pin 4 |
| VCC | Power supply | Supplies both channels; requires 0.1 µF ceramic bypass capacitor adjacent to pin 8 |
Key Features
| Feature | Design Value |
|---|---|
| 5.5 V-tolerant inputs | Eliminates external voltage translators when interfacing 5 V microcontrollers with 3.3 V FPGAs or ASICs |
| Ioff partial-power-down | Permits safe insertion into live backplanes or hot-swappable modules without disrupting upstream logic |
| NanoFree™ packaging | VSSOP-8 footprint reduces board area by >40% vs. standard SOIC-8, critical for portable and dense video encoders |
| Low ground bounce (VOLP < 0.8 V) | Maintains signal integrity in multi-output switching scenarios, reducing need for ferrite beads or layout tuning |
| Wide temp range support | Validated operation from –40°C to +125°C ensures reliability in motor drives and broadcast transcoders |
Applications
| LED Driver Interface | Industrial Bus Isolation |
|---|---|
Use Scenario: Driving high-brightness status LEDs from a 3.3 V MCU GPIO while maintaining compatibility with 5 V sensor subsystems. IC Role / Device Role / Timing Role: Noninverting buffer with 3-state control acts as programmable current sink/source, enabling dynamic LED on/off and brightness modulation via PWM. Use Value: ±24 mA drive eliminates external transistor stages; 5.5 V input tolerance allows direct connection to 5 V I²C pull-ups without level shifters. | Use Scenario: Isolating SPI or parallel data buses between FPGA-based video scalers and legacy motor controller ICs operating at different supply voltages. IC Role / Device Role / Timing Role: Dual-channel 3-state buffer provides direction-controlled signal pass-through with precise enable timing (ten/tdis ≤ 5.1 ns). Use Value: Independent OE pins allow asymmetric bus arbitration; Ioff prevents latch-up during power sequencing mismatches. |
| Video Infrastructure Signal Conditioning | High-Speed Data Acquisition Front-End |
Use Scenario: Buffering pixel clock and sync signals in IP-based video transcoders where EMI immunity and signal edge fidelity are critical. IC Role / Device Role / Timing Role: Low-jitter, rail-to-rail buffer preserves rise/fall times (< 10% degradation at 100 MHz) and minimizes ground bounce-induced jitter. Use Value: 4 ns tpd and < 0.8 V VOLP ensure sub-pixel timing accuracy; VSSOP-8 placement simplifies controlled-impedance trace routing. | Use Scenario: Interfacing ADC output buses to high-speed memory controllers in test equipment requiring simultaneous sampling across multiple channels. IC Role / Device Role / Timing Role: Dual buffer gates isolate ADC digital outputs from memory bus noise, with 3-state control enabling time-multiplexed data reads. Use Value: 10 µA max ICC reduces static power in always-on acquisition paths; 125°C rating supports fanless enclosure designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC2G125DCUR | Inverting output logic (Y = NOT A); identical VCC range, drive strength, and timing specs | Required where signal polarity inversion is needed in bus arbitration or differential signaling chains | Select SN74LVC2G125DCUR only when functional inversion is explicitly required; otherwise 74LVC2G126DCURG4 is preferred for direct buffering. |
| 74LVC2G126DCUTG4 | Same die and electrical specs; differs only in tape-and-reel packaging (250-unit small reel vs. 3000-unit large reel) | No functional difference; chosen for prototyping, low-volume builds, or inventory flexibility | 74LVC2G126DCUTG4 is a drop-in replacement for 74LVC2G126DCURG4 in all designs; select based on procurement volume and logistics needs. |
Compared with SN74LVC2G125DCUR, 74LVC2G126DCURG4 avoids unintended signal inversion in bus hold or feedback paths; compared with 74LVC2G126DCUTG4, it offers identical performance but higher unit volume efficiency for production ramp.
Availability
74LVC2G126DCURG4 is available at Aetrix Electronics and suitable for industrial motor controls, video broadcasting infrastructure, high-speed data acquisition systems, and LED driver interfaces requiring stable component supply across extended temperature ranges.
Supply support for 74LVC2G126DCURG4 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 expertise in high-reliability interface ICs.
The SN74LVC2G126 product line delivers compact, high-drive 3-state buffers for voltage translation and bus isolation in space-constrained, thermally demanding applications such as video infrastructure and industrial automation.
FAQ
What is the maximum operating temperature for the 74LVC2G126DCURG4?
The 74LVC2G126DCURG4 is rated for continuous operation from –40°C to +125°C ambient temperature. This specification is validated per JEDEC JESD78 latch-up testing and thermal characterization in the VSSOP-8 package, making it suitable for under-hood automotive modules and industrial motor drives where ambient temperatures exceed 85°C.
Does the 74LVC2G126DCURG4 support 5 V logic inputs when powered at 3.3 V?
Yes, the 74LVC2G126DCURG4 supports 5.5 V-tolerant inputs across its full 1.65 V to 5.5 V VCC range. When powered at 3.3 V, inputs may swing from 0 V to 5.5 V without damage or functional degradation, enabling direct interfacing with 5 V microcontrollers or legacy peripherals without external level-shifting circuitry.
How does the Ioff feature of the 74LVC2G126DCURG4 improve system reliability?
The Ioff feature in the 74LVC2G126DCURG4 disables output leakage paths when VCC = 0 V, limiting Ioff to ±10 µA. This prevents back-driving of powered-down sections in mixed-voltage systems, protects against latch-up during hot-swap events, and ensures safe insertion into live backplanes-critical for modular video infrastructure and industrial PLC I/O cards.
What is the recommended bypass capacitor for the 74LVC2G126DCURG4 VCC pin?
A 0.1 µF ceramic capacitor is recommended for the 74LVC2G126DCURG4 VCC pin, placed within 3 mm of pin 8 and connected directly to the GND plane. This value is specified in TI's power supply recommendations to suppress high-frequency noise and maintain stable rail voltage during fast output transitions, especially under ±24 mA switching loads.
Can the 74LVC2G126DCURG4 be used in wired-OR configurations?
Yes, the 74LVC2G126DCURG4 supports wired-OR configurations using its dual 3-state outputs. By tying 1Y and 2Y together and controlling 1OE and 2OE independently, designers can implement priority encoding or bus arbitration. Ensure total output current remains ≤50 mA per pin and ≤100 mA total to avoid exceeding absolute maximum ratings.
74LVC2G126DCURG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 8-VFSOP (0.091", 2.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- 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:
- 8-VSSOP
74LVC2G126DCURG4 FAQ
1.How can I place an order for 74LVC2G126DCURG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC2G126DCURG4 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 74LVC2G126DCURG4 reliable?
The price and inventory of 74LVC2G126DCURG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC2G126DCURG4 is usually 5 days.
3.What payment methods are accepted for 74LVC2G126DCURG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC2G126DCURG4 transactions.
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4.How is shipping managed for 74LVC2G126DCURG4?
74LVC2G126DCURG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC2G126DCURG4 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 74LVC2G126DCURG4?
For technical support, including 74LVC2G126DCURG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC2G126DCURG4 requirements.
6.How does Aetrix verify that 74LVC2G126DCURG4 is sourced from the original manufacturer or authorized distributors?
All 74LVC2G126DCURG4 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 74LVC2G126DCURG4 meets industry standards.
7.What is the process for return or replacement of 74LVC2G126DCURG4?
All 74LVC2G126DCURG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC2G126DCURG4, 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 74LVC2G126DCURG4 part is unused and in its original packaging.
Return procedure for 74LVC2G126DCURG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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