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Texas Instruments SN74LVC1G126DSFR
- Part No.:
- SN74LVC1G126DSFR
- Manufacturer:
- Texas Instruments
- Package:
- 6-XFDFN
- Datasheet:
-
SN74LVC1G126DSFR.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 6SON
- Quantity:
- Payment:
- Shipping:
Inventory:7,552
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Product details
Overview
SN74LVC1G126 from Texas Instruments is a single non-inverting bus buffer gate with 3-state output, designed for level-shifting and bidirectional bus isolation in low-voltage digital systems. It operates from 1.65V to 5.5V VCC, accepts inputs up to 5.5V, delivers ±24mA drive at 3.3V, achieves 3.7ns max propagation delay at 3.3V, and supports live insertion via Ioff.
For engineers reviewing the SN74LVC1G126 datasheet, SN74LVC1G126 pinout, SN74LVC1G126 application, or SN74LVC1G126 equivalent, key selection criteria include 3-state control timing (ten/tdis), over-voltage tolerant inputs, NanoFree™ package compatibility, and Ioff-enabled partial power-down behavior in mixed-supply systems.
Technical Context
The SN74LVC1G126 implements a CMOS-based non-inverting buffer with active-high output-enable (OE) logic. Its 3-state output supports high-impedance disconnection when OE is low, enabling shared-bus architectures without contention. The device features balanced sourcing/sinking capability and over-voltage tolerant inputs that accept up to 5.5V regardless of VCC.
It incorporates Ioff circuitry to disable all outputs when VCC = 0V, preventing back-drive current during hot-swap or partial power-down. Input transition rate limits (5 ns/V at 5V) and clamp diodes on all I/O pins ensure robust ESD resilience and signal integrity in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 5.5V - enables interoperability across 1.8V, 2.5V, 3.3V, and 5V logic domains |
| Max tpd | 3.7ns at 3.3V, CL=15pF - supports >200MHz data rates in point-to-point routing |
| Output Drive | ±24mA at 3.3V - drives 50pF loads while maintaining VOL ≤0.55V and VOH ≥2.3V |
| Ioff Leakage | ±10μA max - prevents current flow between powered/unpowered rails during hot insertion |
| Input Voltage Range | –0.5V to 5.5V - allows 5V-tolerant inputs on sub-3.3V supplies without external level shifters |
| ESD Rating | 2000V HBM - meets industrial-grade ESD immunity per ANSI/ESDA/JEDEC JS-001 |
| Operating Temp | –40°C to +125°C - qualified for automotive under-hood and industrial motor-control environments |
Pinout & Package
SN74LVC1G126DSFR uses the DSF (SON, 6-pin) package: 1mm × 1mm body size, 1mm × 1mm package size, no exposed thermal pad, bottom-side terminals. Pin 1 = A (input), Pin 2 = VCC, Pin 3 = Y (output), Pin 4 = N.C., Pin 5 = GND, Pin 6 = OE (active-high enable).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A | Input | True logic input; passes through to Y when OE = high; accepts voltages up to 5.5V independent of VCC |
| VCC | Power | Primary supply rail; sets output voltage levels and defines VIH/VIL thresholds |
| Y | Output | Non-inverting buffered output; enters high-impedance state when OE = low |
| N.C. | No Connect | Unbonded terminal; must remain unconnected per TI mechanical specification |
| GND | Ground | Reference return path for all I/O and supply currents; required for Ioff functionality |
| OE | Enable Control | Active-high 3-state enable; asserts high-impedance output when low; supports asynchronous bus gating |
Key Features
| Feature | Design Value |
|---|---|
| Over-Voltage Tolerant Inputs | Accepts 0–5.5V signals on A and OE regardless of VCC (1.65–5.5V), eliminating external level translators |
| Ioff Partial Power-Down | Blocks current flow between A/Y/OE and VCC/GND when VCC = 0V, enabling safe live insertion into powered backplanes |
| Balanced CMOS 3-State Outputs | Sinks and sources equal ±24mA at 3.3V, ensuring matched rise/fall times and reduced bus skew |
| NanoFree™ Packaging | DSF (1mm × 1mm SON) reduces PCB area by >60% vs. SOT-23 while maintaining thermal resistance of 234°C/W |
| Low ICC Static Current | 10μA max ICC across full temperature range - enables always-on buffering in battery-backed subsystems |
Applications
| Cable Modem Termination Systems | High-Speed Data Acquisition |
|---|---|
Use Scenario: Isolating downstream DOCSIS data paths between RF front-end and baseband processor while supporting dynamic bandwidth allocation. IC Role / Device Role / Timing Role: Bidirectional bus buffer with 3-state control synchronizes with MAC-layer enable signals to prevent upstream collision during channel reconfiguration. Use Value: ±24mA drive ensures clean 100+ Mbps QAM signal integrity across 50Ω traces; Ioff prevents back-drive during partial system reset. | Use Scenario: Buffering parallel ADC output lines in real-time oscilloscopes where multiple channels share a common data bus. IC Role / Device Role / Timing Role: Single-channel non-inverting buffer gates ADC sample data onto shared LVCMOS bus only when enabled by acquisition controller. Use Value: 3.7ns max tpd preserves sub-ns timing alignment across 8-bit parallel outputs; 5.5V-tolerant inputs interface directly with legacy 5V ADCs. |
| Military Radar Signal Processing | Motor Control Gate Drivers |
Use Scenario: Level-shifting and isolating FPGA-configured timing signals to high-voltage IGBT gate drivers in phased-array radar transceivers. IC Role / Device Role / Timing Role: Bus buffer translates 1.8V FPGA GPIO to 3.3V-compatible control signals while providing 3-state isolation during fault conditions. Use Value: –40°C to +125°C operation sustains reliability in sealed radar enclosures; 2000V HBM ESD rating withstands electromagnetic pulse exposure. | Use Scenario: Enabling/disabling PWM signals to isolated gate-driver ICs in servo motor inverters with regenerative braking feedback loops. IC Role / Device Role / Timing Role: 3-state buffer decouples microcontroller PWM outputs from gate-driver inputs during overcurrent shutdown sequences. Use Value: Ioff blocks reverse current from gate-driver bootstrap capacitors into MCU I/O during VCC brownout; 5.5V input tolerance accommodates floating bootstrap node voltages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G125DSFR | Inverting logic function (A → NOT Y); identical pinout, specs, and package | Requires logic inversion in signal path; unsuitable where true-level buffering is mandatory | Select when system design requires inverted enable/control polarity or complements existing non-inverting buffers |
| 74LVC1G126GW,125 | NXP variant in SC-70-5 (DCK) package; same electrical specs but 2mm × 2.1mm footprint | Larger board area; higher RθJA (371°C/W) limits high-density thermal designs | Choose only if DCK package is already standardized in production; avoid for space-constrained layouts requiring DSF's 1mm² footprint |
Compared with SN74LVC1G126DSFR, SN74LVC1G125DSFR provides functional inversion at identical speed and drive strength, while 74LVC1G126GW,125 trades 39% larger PCB area and 60% higher thermal resistance for broader distributor availability in legacy SC-70 assembly lines.
Availability
SN74LVC1G126DSFR is available at Aetrix Electronics and suitable for cable modem termination systems, high-speed data acquisition modules, and military radar signal processors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVC1G126DSFR 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 SN74LVC1G126 belongs to TI's LVC low-voltage CMOS logic family, engineered for voltage translation, bus isolation, and 3-state control in space-constrained, mixed-supply digital systems.
FAQ
What is the maximum input voltage the SN74LVC1G126DSFR can tolerate?
The SN74LVC1G126DSFR accepts input voltages from –0.5V to 5.5V on both A and OE pins, independent of VCC level. This over-voltage tolerance allows direct interfacing with 5V systems while operating from 1.65V–3.3V supplies, eliminating external level-shifters in mixed-voltage designs. Exceeding 5.5V risks permanent damage per Absolute Maximum Ratings.
Does the SN74LVC1G126DSFR support hot-plug operation?
Yes, the SN74LVC1G126DSFR supports hot-plug operation via its Ioff feature. When VCC = 0V, Ioff limits leakage current to ±10μA maximum on all I/O pins, preventing back-drive current into powered circuitry. This enables safe insertion into live backplanes or partial-power-down subsystems without disrupting adjacent components or violating JEDEC JESD78 latch-up requirements.
What is the propagation delay of the SN74LVC1G126DSFR at 3.3V supply?
The SN74LVC1G126DSFR has a maximum propagation delay (tpd) of 3.7ns at VCC = 3.3V with CL = 15pF, measured from A to Y. At higher load capacitances (e.g., 50pF), tpd increases to 4.7ns over –40°C to +125°C. This performance supports reliable operation in 200+ MHz clock domains when routed with controlled impedance and minimal stub length.
Can unused inputs on the SN74LVC1G126DSFR be left floating?
No, unused inputs on the SN74LVC1G126DSFR must not be left floating. Standard CMOS inputs require termination to VCC or GND to prevent oscillation, excessive power consumption, and potential device damage. TI recommends a 10kΩ pull-up or pull-down resistor for unused A or OE pins, especially in systems with slow or intermittent input transitions.
What package type does the SN74LVC1G126DSFR use?
The SN74LVC1G126DSFR uses the DSF package: a 6-pin SON (Small Outline No-lead) with 1mm × 1mm body and package dimensions. It features bottom-side terminals, no exposed thermal pad, and is part of TI's NanoFree™ packaging technology-reducing PCB area by over 60% compared to SOT-23 while maintaining thermal resistance of 234°C/W.
SN74LVC1G126DSFR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 6-XFDFN
- 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:
- 6-SON (1x1)
SN74LVC1G126DSFR FAQ
1.How can I place an order for SN74LVC1G126DSFR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC1G126DSFR 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 SN74LVC1G126DSFR reliable?
The price and inventory of SN74LVC1G126DSFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC1G126DSFR is usually 5 days.
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Once your SN74LVC1G126DSFR 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 SN74LVC1G126DSFR?
For technical support, including SN74LVC1G126DSFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC1G126DSFR requirements.
6.How does Aetrix verify that SN74LVC1G126DSFR is sourced from the original manufacturer or authorized distributors?
All SN74LVC1G126DSFR 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 SN74LVC1G126DSFR meets industry standards.
7.What is the process for return or replacement of SN74LVC1G126DSFR?
All SN74LVC1G126DSFR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC1G126DSFR, 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 SN74LVC1G126DSFR part is unused and in its original packaging.
Return procedure for SN74LVC1G126DSFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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