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Texas Instruments SN74AUC1G126DCKR
- Part No.:
- SN74AUC1G126DCKR
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SN74AUC1G126DCKR.pdf
- Description:
- IC BUFFER NON-INVERT 2.7V SC70-5
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74AUC1G126DCKR from Texas Instruments is a single-channel CMOS bus buffer gate with tri-state output, designed for 1.65–1.95 V operation and 3.6-V I/O tolerant inputs. It delivers ±8 mA output drive at 1.8 V, achieves 1.6 ns typical propagation delay (CL = 15 pF), and supports partial power-down via Ioff. It is used in portable audio interfaces, SSD control logic, and LED indicator drivers where low-voltage signal buffering with fast edge rates is required.
For engineers reviewing the SN74AUC1G126DCKR datasheet, SN74AUC1G126DCKR pinout, SN74AUC1G126DCKR application, or SN74AUC1G126DCKR equivalent, key selection considerations include its 5-pin SC70 package, sub-1 V operability, 2.5 ns maximum tpd at 1.8 V, Ioff-enabled back-drive protection, and compatibility with mixed-mode 1.8 V/3.3 V signal translation.
Technical Context
The SN74AUC1G126DCKR implements a noninverting buffer with active-high output enable (OE), enabling/disabling the Y output based on OE logic level. Its balanced CMOS push-pull output stage provides symmetrical sourcing and sinking capability up to ±8 mA at 1.8 V, supporting clean signal integrity into light capacitive loads.
It features overvoltage-tolerant inputs (up to 3.6 V), allowing interfacing with higher-voltage controllers while operating from a 1.8 V supply. The Ioff circuitry ensures high-impedance inputs and outputs when VCC = 0 V, preventing current backflow during partial power-down sequences in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 0.8 V to 2.7 V; fully functional down to sub-1 V, optimized for 1.65–1.95 V nominal operation. |
| tpd (A→Y) | 1.6 ns typical at 1.8 V, CL = 15 pF; enables high-speed data path buffering in portable digital systems. |
| IOH/IOL | ±8 mA at 1.65 V; sufficient to directly drive LEDs or interface with standard CMOS inputs without external amplification. |
| Ioff | ±10 µA max at VCC = 0 V; isolates powered-down sections to prevent back-current damage in hot-swap or power-gated designs. |
| Input Tolerance | 3.6 V absolute max input voltage; supports level-shifting from 3.3 V or 2.5 V sources into 1.8 V domains without external components. |
| ESD Rating | ±2000 V HBM; meets industrial-grade robustness requirements for handheld and consumer electronics assembly. |
| ICC | 10 µA max; ultra-low quiescent current enables use in battery-powered always-on signal monitoring paths. |
Pinout & Package
SN74AUC1G126DCKR is packaged in a 5-pin SC70 (DCK) package measuring 2.00 mm × 1.25 mm, with 0.65 mm pitch and bottom-side thermal pad not present. This ultra-small footprint supports high-density PCB layouts in space-constrained portable devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OE | Active-high output enable input | Drives Y high-impedance when low; must be pulled to GND via resistor during power-up/down to guarantee safe tri-state behavior. |
| 2 - A | Noninverting logic input | Accepts 0.8–3.6 V signals; overvoltage tolerant and compatible with 1.2 V, 1.8 V, 2.5 V, and 3.3 V logic families. |
| 3 - GND | Ground reference | Return path for all internal logic and output currents; requires low-inductance connection to system ground plane. |
| 4 - Y | Tri-state buffered output | Reproduces A when OE = high; enters high-Z state when OE = low; capable of ±8 mA drive at 1.8 V. |
| 5 - VCC | Positive supply | Supplies core logic and output drivers; requires local 0.1 µF ceramic bypass capacitor placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| NanoFree™ packaging | Dies-as-package construction eliminates bond wires and mold compound, reducing parasitic inductance and enabling smallest-in-class SC70 footprint. |
| Sub-1 V operability | Functional at 0.8 V supply; supports emerging ultra-low-power microcontroller I/O domains and energy-harvesting applications. |
| Ioff partial power-down | Prevents damaging back-current flow when VCC is off, enabling safe integration into multi-supply systems with staggered power sequencing. |
| 3.6-V I/O tolerance | Allows direct connection to legacy 3.3 V buses without level shifters-critical for cost-sensitive SSD and embedded PC designs. |
| 2.5 ns max tpd at 1.8 V | Meets timing budgets for high-speed serial control lines (e.g., SMBus, PMBus, GPIO expansion) in portable AV equipment. |
Applications
| Portable Audio Signal Routing | SSD Controller Interface |
|---|---|
Use Scenario: Routing audio codec control signals (e.g., reset, clock enable) between a 1.8 V SoC and 3.3 V peripheral in MP3 players or wireless headsets. IC Role / Device Role / Timing Role: Level-translating buffer ensuring reliable signal integrity across voltage domains while minimizing board area. Use Value: Eliminates need for discrete level shifters; ±8 mA drive handles capacitive loading of long traces on compact PCBs. |
Use Scenario: Isolating host processor GPIO lines from NAND flash control signals in client SSD modules during power state transitions. IC Role / Device Role / Timing Role: Tri-state buffer enabling dynamic bus sharing and preventing contention during sleep/wake cycles. Use Value: Ioff protection prevents backfeed into powered-down controller; 1.6 ns tpd preserves timing margins in high-throughput storage protocols. |
| LED Indicator Driver | Embedded PC Power Sequencing |
Use Scenario: Driving status LEDs directly from low-voltage MCU GPIO pins in tablets and PDAs where current sourcing capability is limited. IC Role / Device Role / Timing Role: Current-boosting buffer converting weak MCU outputs into robust 8 mA LED drive signals. Use Value: Reduces firmware overhead by eliminating software-controlled PWM dimming; supports 1.8 V operation matching modern SoC I/O rails. |
Use Scenario: Enabling/disabling voltage rail monitors or supervisor ICs during boot-up in industrial embedded PCs with multi-stage power sequencing. IC Role / Device Role / Timing Role: Controlled signal gate synchronizing power-good assertions across independent supply domains. Use Value: OE pin allows precise timing control of enable signals; sub-1 V operation ensures compatibility with auxiliary 0.9 V bias rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AUC1G125DCKR | Inverting buffer (Y = NOT A); identical electrical specs, package, and Ioff behavior. | Requires logic inversion in signal path; unsuitable where polarity must be preserved. | Select only if system-level logic design accommodates inversion; otherwise, SN74AUC1G126DCKR remains the functional match. |
| SN74LVC1G126DBVR | Higher VCC range (1.65–5.5 V); 32 mA drive at 3.3 V; larger SOT-23-5 package (2.9 × 1.6 mm). | Better suited for 3.3 V–5 V systems; incompatible with sub-1.65 V operation or ultra-dense layouts. | Choose for legacy 3.3 V designs requiring higher drive; avoid when 1.8 V optimization or SC70 size is mandatory. |
Compared with SN74AUC1G126DCKR, SN74AUC1G125DCKR offers identical performance in an inverting configuration, while SN74LVC1G126DBVR trades ultra-low-voltage support and footprint for broader voltage range and higher drive-making SN74AUC1G126DCKR optimal for next-gen 1.8 V portable systems demanding minimal size and power.
Availability
SN74AUC1G126DCKR is available at Aetrix Electronics and suitable for portable audio, solid-state drive (SSD), and embedded PC applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for SN74AUC1G126DCKR 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 delivering analog and embedded processing solutions, with over 90 years of innovation in precision analog, power management, and logic technologies.
The SN74AUC1G126DCKR belongs to TI's AUC ultra-low-voltage logic family, engineered specifically for high-speed, low-power signal routing in battery-operated portable electronics and space-constrained embedded systems.
FAQ
What is the recommended operating voltage range for SN74AUC1G126DCKR?
The SN74AUC1G126DCKR is specified for 0.8 V to 2.7 V supply operation, with optimal performance and guaranteed functionality between 1.65 V and 1.95 V. At 1.8 V, it achieves 1.6 ns typical propagation delay and ±8 mA output drive. Operation below 0.8 V is not characterized and may result in undefined behavior or increased ICC.
How does the Ioff feature protect circuits using SN74AUC1G126DCKR?
The Ioff feature in SN74AUC1G126DCKR disables both inputs and outputs when VCC = 0 V, limiting leakage current to ±10 µA. This prevents damaging back-current flow from live signal lines into a powered-down section-critical in multi-rail systems like SSDs or embedded PCs where power sequencing is asynchronous. The SN74AUC1G126DCKR thus enables safe partial power-down without external isolation components.
Can SN74AUC1G126DCKR interface between 3.3 V and 1.8 V logic domains?
Yes. SN74AUC1G126DCKR accepts input voltages up to 3.6 V while operating from a 1.8 V supply, making it suitable for translating 3.3 V control signals (e.g., from a PMIC or supervisor IC) down to 1.8 V logic domains. Its output remains compatible with 1.8 V receivers, and the 3.6-V tolerance eliminates need for external level shifters in SN74AUC1G126DCKR-based designs.
What is the correct power-up sequence for SN74AUC1G126DCKR to ensure tri-state safety?
To guarantee high-impedance output during power-up, the OE pin of SN74AUC1G126DCKR must be held low via a pulldown resistor to GND. TI recommends a resistor value selected based on the driver's sink capability-typically 10 kΩ suffices. This ensures Y remains in tri-state until VCC stabilizes and OE is intentionally asserted, preventing bus contention or unintended signal assertion.
Is SN74AUC1G126DCKR suitable for driving LEDs directly?
Yes. SN74AUC1G126DCKR can source or sink up to ±8 mA at 1.65 V, sufficient to drive standard indicator LEDs with series resistors. For example, at 1.8 V VCC and 2 V LED forward voltage, a 100 Ω resistor yields ~8 mA. Its fast 1.6 ns tpd also supports PWM dimming without waveform distortion. Always verify total output current stays within ±20 mA absolute maximum ratings per device.
SN74AUC1G126DCKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AUC
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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:
- 9mA, 9mA
- Voltage - Supply:
- 0.8V ~ 2.7V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
SN74AUC1G126DCKR FAQ
1.How can I place an order for SN74AUC1G126DCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AUC1G126DCKR 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 SN74AUC1G126DCKR reliable?
The price and inventory of SN74AUC1G126DCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AUC1G126DCKR is usually 5 days.
3.What payment methods are accepted for SN74AUC1G126DCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AUC1G126DCKR transactions.
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4.How is shipping managed for SN74AUC1G126DCKR?
SN74AUC1G126DCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AUC1G126DCKR 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 SN74AUC1G126DCKR?
For technical support, including SN74AUC1G126DCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AUC1G126DCKR requirements.
6.How does Aetrix verify that SN74AUC1G126DCKR is sourced from the original manufacturer or authorized distributors?
All SN74AUC1G126DCKR 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 SN74AUC1G126DCKR meets industry standards.
7.What is the process for return or replacement of SN74AUC1G126DCKR?
All SN74AUC1G126DCKR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AUC1G126DCKR, 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 SN74AUC1G126DCKR part is unused and in its original packaging.
Return procedure for SN74AUC1G126DCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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