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Texas Instruments 74LVC1G126DBVRG4
- Part No.:
- 74LVC1G126DBVRG4
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
74LVC1G126DBVRG4.pdf
- Description:
- IC BUF NON-INVERT 5.5V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,446
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Product details
Overview
74LVC1G126DBVRG4 from Texas Instruments is a single non-inverting bus buffer gate with 3-state output, designed for level translation and bidirectional bus isolation in low-voltage digital systems. It operates from 1.65V to 5.5V, supports 5.5V-tolerant inputs, delivers ±24mA drive at 3.3V, achieves 3.7ns max propagation delay, and features Ioff for live insertion in partial-power-down systems - used in high-speed data acquisition and video infrastructure signal routing.
For engineers reviewing the 74LVC1G126DBVRG4 datasheet, 74LVC1G126DBVRG4 pinout, 74LVC1G126DBVRG4 application, or 74LVC1G126DBVRG4 equivalent, key selection criteria include 3-state enable timing (ten/tdis ≤5.5ns), overvoltage-tolerant input compatibility with mixed-supply interfaces, thermal performance in SOT-23-5 (RθJA = 357.1°C/W), and Ioff leakage <±10μA at VCC = 0V.
Technical Context
The 74LVC1G126DBVRG4 implements a CMOS-based non-inverting buffer with active-high output-enable control (OE), where Y = A when OE = HIGH and Y = high-impedance when OE = LOW. Its balanced 3-state outputs support symmetrical sourcing/sinking up to ±24mA at 3.3V, enabling robust driving of light capacitive loads (≤50pF) without external termination.
It integrates overvoltage-tolerant input circuitry that accepts up to 5.5V regardless of VCC (1.65–5.5V), enabling seamless interfacing between 1.8V, 2.5V, 3.3V, and 5V logic domains. The Ioff feature disables all outputs when VCC = 0V, preventing back-drive current and supporting hot-plug operation in modular systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 5.5V - enables interoperability across 1.8V/2.5V/3.3V/5V logic families without level shifters |
| Input Voltage Tolerance | Up to 5.5V - allows direct connection to higher-voltage buses while powered from lower VCC |
| tpd (max) | 3.7ns at VCC = 3.3V, CL = 15pF - supports >100MHz data rates in short-trace, low-capacitance paths |
| Output Drive | ±24mA at VCC = 3.3V - sufficient to drive multiple CMOS inputs or moderate PCB traces without buffering |
| Ioff Leakage | <±10μA at VCC = 0V - prevents power rail contention during hot-swap or partial power-down sequences |
| ICC (max) | 10μA - ensures ultra-low static power in battery-backed or always-on monitoring circuits |
| ESD Rating (HBM) | 2000V - meets industrial-grade handling requirements without additional protection circuitry |
Pinout & Package
SOT-23-5 (DBV) package: 2.9mm × 2.8mm footprint, 1.6mm body width, 5-pin surface-mount with gull-wing leads. Designed for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OE | Active-high output enable input | Drives Y into high-impedance when LOW; must be tied to GND during power-up to prevent bus contention |
| 2 - A | Data input | Non-inverting input accepting 0–5.5V; compatible with 1.65V–5.5V VCC without level translation |
| 3 - GND | Ground reference | Primary return path for supply and signal currents; requires low-inductance connection to system ground plane |
| 4 - Y | 3-state buffered output | True replica of A when OE = HIGH; high-Z state isolates downstream circuitry when OE = LOW |
| 5 - VCC | Power supply | Supplies internal logic and output drivers; requires local 0.1μF bypass capacitor adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Overvoltage-tolerant inputs | Accepts up to 5.5V regardless of VCC (1.65–5.5V), eliminating need for external clamping or translation in mixed-voltage systems |
| Low propagation delay | 3.7ns max at 3.3V/15pF enables clean signal integrity in high-speed digital interconnects up to ~270MHz |
| Ioff partial-power-down | Blocks current flow through I/O pins when VCC = 0V, enabling safe live insertion into powered backplanes or modular chassis |
| Balanced 3-state drive | ±24mA output capability at 3.3V ensures matched rise/fall times and stable termination into typical CMOS loads |
| NanoFree™ packaging | SOT-23-5 footprint minimizes board area and thermal resistance (RθJA = 357.1°C/W), supporting compact, thermally efficient designs |
Applications
| Video Broadcasting Infrastructure | High-Speed Data Acquisition |
|---|---|
Use Scenario: Signal routing between FPGA I/O banks and SDI serializer ICs operating at different voltage domains (e.g., 1.8V FPGA core, 3.3V serializer interface). IC Role / Device Role / Timing Role: Level-translating bus buffer isolating bidirectional control lines and enabling/disabling parallel data paths under FPGA control. Use Value: Eliminates need for discrete level shifters; 5.5V-tolerant A input accepts 3.3V control signals while VCC = 1.8V, preserving timing margins with 3.7ns tpd. |
Use Scenario: Isolating ADC digital output lines from shared microcontroller data bus during conversion cycles to prevent sampling corruption. IC Role / Device Role / Timing Role: 3-state buffer gated by ADC BUSY signal to place Y in high-Z during conversion, then pass converted data on completion. Use Value: Prevents bus contention and reduces dynamic power; Ioff ensures no leakage current flows into ADC when microcontroller is powered down. |
| Military Radar Signal Processing | Motor Control Interface |
Use Scenario: Enabling/disabling JESD204B lane alignment words between high-speed DACs and FPGA-based beamforming engines in radars. IC Role / Device Role / Timing Role: Single-buffer gate synchronizing alignment pulse distribution with system clock domain boundaries using OE edge-triggered enable. Use Value: Guarantees sub-4ns timing precision between lanes; ±24mA drive sustains signal integrity over 50mm FR4 traces at 1Gbps. |
Use Scenario: Interfacing isolated gate driver enable signals (5V logic) to 3.3V microcontroller GPIOs in servo amplifier modules. IC Role / Device Role / Timing Role: Voltage-tolerant buffer translating MCU output to gate driver input while providing noise-immune 3-state isolation during fault conditions. Use Value: Withstands 5.5V transients on A pin during ESD events; 2000V HBM rating eliminates need for external TVS diodes on control lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G125DBVR | Inverting logic (Y = NOT A); identical VCC range, drive strength, and timing specs | Requires logic inversion in signal path; unsuitable where polarity must be preserved | Select only if system-level logic already accounts for inversion; otherwise, 74LVC1G126DBVRG4 is required for true buffering |
| 74AUP1G126GW,125 | Lower ICC (5μA vs. 10μA), slower tpd (5.2ns vs. 3.7ns), same 3-state architecture and 5.5V-tolerant inputs | Better suited for ultra-low-power battery-operated sensors; marginal for >100MHz timing-critical paths | Prefer 74LVC1G126DBVRG4 when speed or drive strength dominates; choose 74AUP1G126GW,125 only when sub-5μA static current is mandatory |
Compared with SN74LVC1G125DBVR and 74AUP1G126GW,125, the 74LVC1G126DBVRG4 uniquely balances 3.7ns speed, ±24mA drive, and 5.5V input tolerance in a NanoFree™ SOT-23-5 package - making it optimal for high-fidelity signal routing where polarity preservation, timing margin, and mixed-voltage resilience are jointly critical.
Availability
74LVC1G126DBVRG4 is available at Aetrix Electronics and suitable for high-speed data acquisition, video broadcasting infrastructure, military radar signal processing, and motor control interface applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for 74LVC1G126DBVRG4 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 innovation in high-reliability interface and power management ICs.
The SN74LVC1G126 product line delivers single-gate 3-state buffers optimized for voltage translation, bus isolation, and hot-swap compatibility in space-constrained industrial, automotive, and communications equipment.
FAQ
What is the maximum input voltage the 74LVC1G126DBVRG4 can tolerate?
The 74LVC1G126DBVRG4 supports input voltages up to 5.5V regardless of VCC level (1.65V–5.5V), enabling direct interfacing with higher-voltage logic families without external level-shifting components. This overvoltage tolerance is implemented via dedicated input protection circuitry without a standard positive clamp diode, as confirmed in the TI datasheet Section 7.3.5. Exceeding 5.5V risks permanent damage per Absolute Maximum Ratings.
Does the 74LVC1G126DBVRG4 support hot-swap or live-insertion applications?
Yes, the 74LVC1G126DBVRG4 supports live insertion via its Ioff feature, which disables all outputs and limits leakage current to <±10μA when VCC = 0V. This prevents back-driving of powered circuitry and eliminates bus contention during module replacement - a key requirement in telecom line cards and modular test equipment. The feature is validated per JESD78 Class II latch-up performance (>100mA).
What is the recommended bypass capacitor for the 74LVC1G126DBVRG4?
A 0.1μF ceramic capacitor placed as close as possible to the VCC pin (Pin 5) and GND pin (Pin 3) is recommended for the 74LVC1G126DBVRG4. TI specifies this value in Section 8.3 to suppress high-frequency noise and stabilize supply voltage during output switching. For enhanced broadband filtering, a parallel 1μF capacitor may be added - but the 0.1μF unit must be physically adjacent to the device with minimal trace length and low-inductance ground return.
Can the 74LVC1G126DBVRG4 drive a 50pF load while meeting timing specs?
Yes, the 74LVC1G126DBVRG4 is characterized to meet all switching specifications (including tpd ≤3.7ns) with CL = 15pF, and TI explicitly states in Section 8.2.1.1 that it can drive loads ≤50pF while maintaining full datasheet compliance. For loads exceeding 50pF, TI recommends adding a series resistor at the output to limit peak current and prevent ringing - ensuring signal integrity without violating absolute maximum ratings.
How does the OE pin behave during power-up, and what is the safe default state?
During power-up, the OE pin must be held LOW (tied to GND) to ensure the Y output remains in high-impedance state until VCC stabilizes and system control logic asserts a valid enable signal. If OE floats or rises before VCC reaches minimum operating voltage (1.65V), the output may enter an undefined state, risking bus contention. TI's Functional Block Diagram and Section 7.1 explicitly recommend tying OE to GND for power-up safety in the 74LVC1G126DBVRG4.
74LVC1G126DBVRG4 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
74LVC1G126DBVRG4 FAQ
1.How can I place an order for 74LVC1G126DBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC1G126DBVRG4 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 74LVC1G126DBVRG4 reliable?
The price and inventory of 74LVC1G126DBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC1G126DBVRG4 is usually 5 days.
3.What payment methods are accepted for 74LVC1G126DBVRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC1G126DBVRG4 transactions.
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4.How is shipping managed for 74LVC1G126DBVRG4?
74LVC1G126DBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC1G126DBVRG4 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 74LVC1G126DBVRG4?
For technical support, including 74LVC1G126DBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC1G126DBVRG4 requirements.
6.How does Aetrix verify that 74LVC1G126DBVRG4 is sourced from the original manufacturer or authorized distributors?
All 74LVC1G126DBVRG4 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 74LVC1G126DBVRG4 meets industry standards.
7.What is the process for return or replacement of 74LVC1G126DBVRG4?
All 74LVC1G126DBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC1G126DBVRG4, 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 74LVC1G126DBVRG4 part is unused and in its original packaging.
Return procedure for 74LVC1G126DBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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