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Texas Instruments SN74LVC1G126YEAR
- Part No.:
- SN74LVC1G126YEAR
- Manufacturer:
- Texas Instruments
- Package:
- 5-XFBGA, DSBGA
- Datasheet:
-
SN74LVC1G126YEAR.pdf
- Description:
- IC BUF NON-INVERT 5.5V 5DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,262
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Product details
Overview
SN74LVC1G126YEAR from Texas Instruments is a single-channel 3-state bus buffer gate used for signal isolation and bidirectional bus control in low-voltage digital systems. It features true (non-inverting) logic, 3.3V/5V-compatible operation, ±24mA output drive at 3.3V, 3.7ns max propagation delay, and Ioff support for live insertion. It serves in high-speed data acquisition paths and motor control interface stages.
For engineers reviewing the SN74LVC1G126YEAR datasheet, SN74LVC1G126YEAR pinout, SN74LVC1G126YEAR application, or SN74LVC1G126YEAR equivalent, key selection criteria include 3-state enable timing (ten/tdis), over-voltage tolerant inputs (up to 5.5V), Ioff current specification (±10μA), thermal metrics for SOT-23-5 (RθJA = 357.1°C/W), and compatibility with 1.65V–5.5V supply rails.
Technical Context
The SN74LVC1G126YEAR implements a non-inverting CMOS buffer with active-high output-enable control. Its 3-state output supports bus sharing by enabling/disabling signal flow without loading downstream nodes. The device uses balanced CMOS output drivers capable of sourcing and sinking equal current (±24mA at 3.3V), ensuring symmetrical edge rates.
It incorporates Ioff circuitry that disables all outputs when VCC = 0V, preventing back-drive current during partial power-down. Inputs tolerate up to 5.5V regardless of VCC level-enabling mixed-voltage interfacing-and feature standard CMOS input structure with 4pF typical input capacitance and ±5μA leakage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 5.5V - supports direct interface with 1.8V, 2.5V, 3.3V, and 5V logic domains |
| tpd (max) | 3.7ns at 3.3V, CL = 15pF - enables >200MHz data throughput in short trace applications |
| Output Drive | ±24mA at 3.3V - sufficient to drive 50Ω transmission lines or multiple 74LVC inputs |
| Ioff Current | ±10μA max - ensures safe hot-plug operation and prevents back-current into powered subsystems |
| Input Voltage Range | 0V to 5.5V - allows 5V-tolerant inputs on sub-3.3V supplies, eliminating level shifters |
| ICC (max) | 10μA - ultra-low static power ideal for battery-backed or always-on monitoring circuits |
| ESD Rating | HBM: 2000V - meets industrial-grade ESD robustness per ANSI/ESDA/JEDEC JS-001 |
Pinout & Package
SN74LVC1G126YEAR is packaged in the YEA (SOT-23-5) variant of Texas Instruments' NanoFree™ package: 2.9mm × 2.8mm footprint, 2.9mm × 1.6mm body, 0.95mm max height, and lead-free / RoHS-compliant construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - A | Input | Data input node; accepts 0–5.5V signals independent of VCC |
| 2 - GND | Ground Reference | Primary return path for output current and internal logic; must be low-impedance |
| 3 - OE | Enable Input | Active-high 3-state control; drives Y high-impedance when low (logic 0) |
| 4 - Y | 3-State Output | True-buffered output; drives high/low or floats based on OE state and A input |
| 5 - VCC | Power Supply | Core supply rail (1.65–5.5V); powers internal logic and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Over-voltage tolerant inputs | Accepts 0–5.5V on A/OE pins with any VCC ≥1.65V - eliminates external level translators |
| Ioff partial-power-down protection | Blocks current flow between A/OE/Y and VCC/GND when VCC = 0V - enables hot-swap capability |
| Balanced CMOS 3-state outputs | Sources/sinks ±24mA symmetrically at 3.3V - ensures matched rise/fall times and clean signal integrity |
| NanoFree™ SOT-23-5 package | 2.9mm × 2.8mm footprint with no bond wires - reduces parasitic inductance and improves high-frequency performance |
| Low dynamic power consumption | Cpd = 19pF at 3.3V - minimizes switching current and system-level EMI in dense PCB layouts |
Applications
| Cable Modem Termination Systems | High-Speed Data Acquisition |
|---|---|
Use Scenario: Isolating DOCSIS upstream/downstream data paths during firmware updates or channel reconfiguration. IC Role / Device Role / Timing Role: 3-state buffer controlling bidirectional data routing between PHY and MAC layers under software-controlled OE. Use Value: Prevents bus contention during reconfiguration while maintaining <3.7ns propagation delay for real-time packet forwarding. |
Use Scenario: Buffering ADC output streams before FPGA capture, especially where multiple ADCs share a common data bus. IC Role / Device Role / Timing Role: Single-channel bus driver enabling time-multiplexed sampling across parallel ADC channels via synchronized OE control. Use Value: ±24mA drive strength sustains signal integrity across 10cm PCB traces; Ioff prevents back-driving during ADC power cycling. |
| Military Radar Signal Processing | Motor Control Interface |
Use Scenario: Interfacing FPGAs to radiation-hardened DACs in phased-array radar front-ends requiring fault-isolated signal paths. IC Role / Device Role / Timing Role: Non-inverting buffer with 3-state output managing clock/data handshaking between FPGA and high-voltage DAC controllers. Use Value: 125°C operational rating and 100mA latch-up immunity meet MIL-STD-883 Class II requirements for airborne systems. |
Use Scenario: Level-shifting and isolating microcontroller GPIOs driving gate drivers in BLDC motor inverters with 48V+ bus voltages. IC Role / Device Role / Timing Role: Voltage-tolerant buffer translating 3.3V MCU logic to isolated gate-driver enable inputs while blocking transients. Use Value: 5.5V input tolerance eliminates discrete clamping diodes; 3.7ns tpd supports PWM dead-time precision below 10ns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G125YEAR | Inverting logic function (A → NOT Y); identical pinout, specs, and package | Requires logic inversion in signal path; unsuitable where polarity must be preserved | Select only if system-level logic inversion is acceptable or already compensated |
| 74AUP1G126GW,125 | Lower ICC (5μA max), slower tpd (5.2ns @ 3.3V), different package (SC-70-5) | Better for ultra-low-power sleep modes; less suitable for >150MHz timing-critical paths | Prefer for battery-powered sensor nodes where static power dominates; avoid for high-speed acquisition |
Compared with SN74LVC1G126YEAR, SN74LVC1G125YEAR preserves timing and drive but flips logic polarity, while 74AUP1G126GW,125 trades speed for lower quiescent current and uses a different thermal profile due to SC-70 packaging.
Availability
SN74LVC1G126YEAR is available at Aetrix Electronics and suitable for cable modem termination systems, high-speed data acquisition, and motor control interface designs requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for SN74LVC1G126YEAR 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 over 50 years of innovation in high-reliability interface ICs.
The SN74LVC1G126YEAR belongs to TI's LVC (Low-Voltage CMOS) logic family, designed specifically for voltage-flexible, low-power, high-speed digital interfacing in space-constrained industrial and communications equipment.
FAQ
What is the maximum operating temperature for SN74LVC1G126YEAR?
The SN74LVC1G126YEAR is rated for continuous operation from –40°C to +125°C ambient temperature. This extended range is validated per JEDEC JESD78 Class II latch-up testing and supports deployment in under-hood automotive modules, industrial motor drives, and military radar enclosures where thermal margins are critical. The SN74LVC1G126YEAR maintains full electrical specifications across this range when operated within recommended VCC and load conditions.
Does SN74LVC1G126YEAR support 5V-tolerant inputs on a 3.3V supply?
Yes. The SN74LVC1G126YEAR accepts input voltages up to 5.5V on both A and OE pins regardless of VCC level - including when VCC = 3.3V. This over-voltage tolerance is implemented via internal protection circuitry without positive clamp diodes, allowing direct connection to 5V microcontrollers or legacy peripherals without external level shifters. The SN74LVC1G126YEAR datasheet explicitly confirms this behavior in Section 5.3 and 7.3.5.
What is the purpose of the Ioff specification in SN74LVC1G126YEAR?
The Ioff specification (±10μA max) defines leakage current at A, OE, and Y terminals when VCC = 0V. This enables safe live insertion and partial-power-down operation: when one board is powered down while others remain active, the SN74LVC1G126YEAR prevents back-driving current from powered subsystems into its unpowered IO pins. This protects both the SN74LVC1G126YEAR and connected devices - a requirement in modular telecom and test equipment architectures.
Can SN74LVC1G126YEAR drive a 50Ω transmission line directly?
Yes - the SN74LVC1G126YEAR can drive a 50Ω load with controlled impedance, provided the output current remains within its ±24mA rating at 3.3V. At VOH = 2.3V (min), it delivers ~46mA into 50Ω, exceeding absolute max ratings; therefore, a series 33Ω resistor is recommended to limit peak current and suppress reflections. The SN74LVC1G126YEAR's fast 3.7ns tpd and low Cpd (19pF) make it well-suited for such terminated line driving when combined with proper layout practices.
Is SN74LVC1G126YEAR pin-compatible with other SOT-23-5 logic buffers?
SN74LVC1G126YEAR shares the same SOT-23-5 (DBV) pinout as SN74LVC1G125YEAR, SN74LVC1G07YEAR, and SN74LVC1G08YEAR - all use identical 1:A, 2:GND, 3:OE, 4:Y, 5:VCC mapping. However, functional compatibility requires verification: SN74LVC1G126YEAR is non-inverting, while SN74LVC1G125YEAR is inverting. Substituting without logic review may cause system failure. The SN74LVC1G126YEAR pinout is standardized per TI's DBV mechanical drawing SLMS179C.
SN74LVC1G126YEAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 5-XFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-DSBGA (1.4x0.9)
SN74LVC1G126YEAR FAQ
1.How can I place an order for SN74LVC1G126YEAR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC1G126YEAR 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 SN74LVC1G126YEAR reliable?
The price and inventory of SN74LVC1G126YEAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC1G126YEAR is usually 5 days.
3.What payment methods are accepted for SN74LVC1G126YEAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC1G126YEAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC1G126YEAR?
SN74LVC1G126YEAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC1G126YEAR 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 SN74LVC1G126YEAR?
For technical support, including SN74LVC1G126YEAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC1G126YEAR requirements.
6.How does Aetrix verify that SN74LVC1G126YEAR is sourced from the original manufacturer or authorized distributors?
All SN74LVC1G126YEAR 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 SN74LVC1G126YEAR meets industry standards.
7.What is the process for return or replacement of SN74LVC1G126YEAR?
All SN74LVC1G126YEAR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC1G126YEAR, 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 SN74LVC1G126YEAR part is unused and in its original packaging.
Return procedure for SN74LVC1G126YEAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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