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Texas Instruments SN74LVC1G126DBVT
- Part No.:
- SN74LVC1G126DBVT
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
SN74LVC1G126DBVT.pdf
- Description:
- IC BUF NON-INVERT 5.5V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:52,862
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Product details
Overview
SN74LVC1G126DBVT from Texas Instruments is a single-channel 3-state bus buffer gate used for signal isolation and controlled data routing in low-voltage digital systems. It operates from 1.65V to 5.5V, delivers ±24mA output drive at 3.3V, achieves 3.7ns max propagation delay, and supports over-voltage tolerant inputs up to 5.5V - enabling level translation in mixed-supply interfaces such as FPGA I/O expansion or microcontroller peripheral control.
For engineers reviewing the SN74LVC1G126DBVT datasheet, SN74LVC1G126DBVT pinout, SN74LVC1G126DBVT application, or SN74LVC1G126DBVT equivalent, key selection criteria include its SOT-23-5 NanoFree™ package, Ioff-enabled live insertion capability, 10μA max ICC quiescent current, and guaranteed 3-state behavior across –40°C to 125°C industrial temperature range.
Technical Context
The SN74LVC1G126DBVT implements a non-inverting buffer with active-high 3-state enable (OE), where Y = A when OE = HIGH and Y = high-impedance when OE = LOW. Its CMOS input structure accepts voltages up to 5.5V independent of VCC, enabling down-translation from 5V logic to 3.3V or 1.8V domains without external level shifters.
It features balanced push-pull outputs capable of sourcing/sinking ±24mA at 3.3V, Ioff protection that disables all outputs during power-down, and latch-up immunity exceeding 100mA per JESD78 Class II - making it suitable for hot-swap-capable backplane interfaces and motor-control logic sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 5.5V - supports operation across 1.8V, 2.5V, 3.3V, and 5V logic families |
| Max tpd | 3.7ns at 3.3V/CL=15pF - enables timing-critical signal buffering in high-speed digital interconnects |
| Output Drive | ±24mA at 3.3V - sufficient to drive multiple LVC loads or moderate capacitive traces without external buffers |
| Ioff Current | ±10μA max - prevents back-driving and ensures safe partial-power-down in multi-rail systems |
| Input Voltage Tolerance | Up to 5.5V regardless of VCC - allows direct interfacing with legacy 5V peripherals while powered from lower rails |
| ICC Quiescent | 10μA max - minimizes standby power in battery-backed or always-on subsystems |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive, industrial motor drives, and telecom infrastructure |
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 |
|---|---|---|
| A | Data Input | Non-inverting input; accepts 0–5.5V logic levels independent of VCC |
| Y | Buffered Output | True-output with 3-state control; drives high/low or floats based on OE state |
| OE | Enable Input | Active-HIGH enable; pulls Y to high-impedance when LOW |
| GND | Ground Reference | Return path for all internal circuitry and output current sinking |
| VCC | Supply Voltage | Primary power rail; sets logic thresholds and output voltage swing |
Key Features
| Feature | Design Value |
|---|---|
| NanoFree™ SOT-23-5 package | 1.39mm × 0.89mm DSBGA alternative available; reduces board area by >50% vs standard SOT-23 |
| Ioff partial-power-down support | Enables live insertion and prevents back-drive damage when VCC = 0V |
| Over-voltage tolerant inputs | Accepts 5.5V signals while VCC = 1.65V–3.3V - eliminates need for discrete level translators |
| Low dynamic power consumption | Cpd = 19pF at 3.3V - limits switching current and EMI in high-frequency clock/data paths |
| Latch-up immunity | >100mA per JESD78 Class II - ensures robustness in noisy industrial environments |
Applications
| Industrial Motor Control | FPGA I/O Expansion |
|---|---|
Use Scenario: Isolating encoder feedback signals and PWM command lines between MCU and high-voltage gate drivers in servo drives. IC Role / Device Role / Timing Role: Signal buffer with 3-state control enables dynamic bus sharing between position loop and current loop processors. Use Value: ±24mA drive strength sustains signal integrity across 10cm PCB traces; Ioff prevents fault propagation during power sequencing. |
Use Scenario: Extending limited FPGA GPIO count to interface with external ADCs, DACs, and memory-mapped peripherals. IC Role / Device Role / Timing Role: Level-translating buffer allowing 5V legacy sensors to connect to 3.3V FPGA banks without external translators. Use Value: 5.5V-tolerant inputs eliminate discrete clamping diodes; 3.7ns tpd preserves setup/hold margins in 100MHz+ data capture. |
| Automotive Radar Processing | Power Line Communication Modems |
Use Scenario: Routing time-critical LVDS or CMOS clock/data between radar SoC and RF front-end modules in ADAS ECUs. IC Role / Device Role / Timing Role: Low-jitter, low-propagation-delay buffer ensuring deterministic timing alignment across distributed processing units. Use Value: 125°C rating supports under-hood placement; 10μA ICC minimizes thermal load in thermally constrained enclosures. |
Use Scenario: Managing bidirectional data flow between PLC PHY IC and host controller over noisy AC mains wiring. IC Role / Device Role / Timing Role: Direction-controlled bus isolator preventing signal contention during half-duplex line arbitration. Use Value: Fast enable/disable (tdis ≤ 4.2ns at 5V) enables precise turnaround timing; ESD rating (2kV HBM) withstands field-induced transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC1G125DBVT | Inverting buffer (Y = NOT A); identical electrical specs, pinout, and package | Required where signal polarity inversion is acceptable or needed for logic correction | Select when system-level logic requires inversion; otherwise, SN74LVC1G126DBVT provides true buffering without added gates |
| SN74AUP1G126DBVR | Lower ICC (500nA typical), slower tpd (5.8ns max), wider VCC range (0.8–3.6V) | Better suited for ultra-low-power battery-operated devices, not high-speed interfaces | Choose SN74LVC1G126DBVT for speed-critical 3.3V/5V systems; use AUP variant only when sub-μA standby dominates design priorities |
Compared with 74LVC1G125DBVT and SN74AUP1G126DBVR, the SN74LVC1G126DBVT uniquely balances 3.7ns speed, ±24mA drive, and 5.5V input tolerance in a 5-pin SOT-23 - making it optimal for industrial and automotive signal routing where timing, drive strength, and mixed-voltage interoperability are jointly critical.
Availability
SN74LVC1G126DBVT is available at Aetrix Electronics and suitable for industrial motor controls, automotive radar modules, and power-line communication modems requiring stable component supply across extended temperature and long production lifecycles.
Supply support for SN74LVC1G126DBVT 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 for industrial, automotive, and communications markets.
The SN74LVC1G126DBVT belongs to TI's LVC logic family - engineered for low-voltage operation, high noise immunity, and seamless voltage translation in space-constrained, high-reliability digital systems.
FAQ
What is the maximum operating temperature for the SN74LVC1G126DBVT?
The SN74LVC1G126DBVT is rated for continuous operation from –40°C to +125°C ambient temperature. This full industrial temperature range is validated per JEDEC JESD22-A108 and supports deployment in engine control units, industrial inverters, and outdoor telecom equipment where thermal stress is significant. The SN74LVC1G126DBVT maintains specified timing and drive performance across this range when operated within recommended VCC and load conditions.
Does the SN74LVC1G126DBVT support 5V-tolerant inputs when powered from 3.3V?
Yes, the SN74LVC1G126DBVT supports input voltages up to 5.5V regardless of VCC level - including when VCC = 3.3V. This over-voltage tolerance is implemented via internal protection circuitry without positive clamp diodes, enabling direct connection to 5V peripherals like legacy sensors or microcontrollers without external level-shifting components. The SN74LVC1G126DBVT datasheet explicitly confirms this behavior in Section 5.3 and 7.3.5.
Can the SN74LVC1G126DBVT be used in hot-swap applications?
Yes, the SN74LVC1G126DBVT supports hot-swap operation through its Ioff feature, which disables all outputs and limits leakage to ±10μA when VCC = 0V. This prevents back-driving of live backplanes or powered subsystems during card insertion/removal. The SN74LVC1G126DBVT meets JESD78 Class II latch-up immunity (>100mA), further enhancing reliability in modular chassis systems where the SN74LVC1G126DBVT may interface with active buses.
What is the typical propagation delay of the SN74LVC1G126DBVT at 3.3V?
The SN74LVC1G126DBVT has a maximum propagation delay (tpd) of 3.7ns at VCC = 3.3V, CL = 15pF, and TA = 25°C. Typical delay is lower - approximately 2.5ns under those same conditions - as confirmed in Section 5.6 of the official datasheet. This performance enables reliable use in 100+ MHz digital interfaces, and the SN74LVC1G126DBVT maintains sub-5ns delay even at 125°C per Section 5.8.
Is the SN74LVC1G126DBVT pin-compatible with other 5-pin SOT-23 logic buffers?
The SN74LVC1G126DBVT uses the standard DBV (SOT-23-5) pinout: Pin 1 = OE, Pin 2 = A, Pin 3 = GND, Pin 4 = Y, Pin 5 = VCC. It is pin-compatible with TI's 74LVC1G125DBVT (inverting version) and functionally compatible with ON Semiconductor's NL17SZ126DBVT, though layout validation is required due to minor package dimension variances. Always verify mechanical fit and thermal pad presence before drop-in replacement of the SN74LVC1G126DBVT.
SN74LVC1G126DBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- SC-74A, SOT-753
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
SN74LVC1G126DBVT FAQ
1.How can I place an order for SN74LVC1G126DBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC1G126DBVT 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 SN74LVC1G126DBVT reliable?
The price and inventory of SN74LVC1G126DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC1G126DBVT is usually 5 days.
3.What payment methods are accepted for SN74LVC1G126DBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC1G126DBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC1G126DBVT?
SN74LVC1G126DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC1G126DBVT 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 SN74LVC1G126DBVT?
For technical support, including SN74LVC1G126DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC1G126DBVT requirements.
6.How does Aetrix verify that SN74LVC1G126DBVT is sourced from the original manufacturer or authorized distributors?
All SN74LVC1G126DBVT 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 SN74LVC1G126DBVT meets industry standards.
7.What is the process for return or replacement of SN74LVC1G126DBVT?
All SN74LVC1G126DBVT units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC1G126DBVT, 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 SN74LVC1G126DBVT part is unused and in its original packaging.
Return procedure for SN74LVC1G126DBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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