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Texas Instruments SN74AUC1G125DBVR
- Part No.:
- SN74AUC1G125DBVR
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
SN74AUC1G125DBVR.pdf
- Description:
- IC BUF NON-INVERT 2.7V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,334
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Product details
Overview
SN74AUC1G125 from Texas Instruments is a single 3-state bus buffer gate optimized for 1.8-V operation, delivering ±8-mA output drive, 2.5-ns max propagation delay at 1.8 V/30 pF, 0.8–2.7-V supply range, and over-voltage tolerant I/Os up to 3.6 V. It serves as a high-speed signal redriver in low-voltage digital interfaces such as memory data paths and FPGA I/O expansion.
For engineers reviewing the SN74AUC1G125 datasheet, SN74AUC1G125 pinout, SN74AUC1G125 application, or SN74AUC1G125 equivalent, key selection criteria include 3-state control timing (tdis/ten), Ioff-enabled partial power-down capability, ULTTL output impedance matching for 50–65-Ω transmission lines, and NanoFree™ DSBGA package compatibility with ultra-dense PCB layouts.
Technical Context
The SN74AUC1G125 implements a noninverting 3-state buffer with active-low output-enable (OE) logic. Its ULTTL output structure dynamically adjusts impedance during signal transitions to suppress ringing and minimize reflections on controlled-impedance lines under 15 cm.
It supports true partial-power-down operation via Ioff circuitry that disables outputs and limits back-drive current when VCC = 0 V. Input tolerance extends to 3.6 V independent of VCC, enabling level-shifting between 1.8-V logic domains and higher-voltage peripherals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 0.8 V to 2.7 V - enables interoperability across 1.2-V, 1.8-V, and 2.5-V logic families without level shifters |
| Max Propagation Delay | 2.5 ns at 1.8 V, 30-pF load - supports >250-MHz signal re-driving in high-speed digital interconnects |
| Output Drive Strength | ±8 mA at 1.8 V - sufficient to drive 50-Ω transmission lines directly without external termination resistors |
| Ioff Current | ±10 µA at 2.7 V - ensures safe isolation during hot-swap or partial system power-down sequences |
| Input Voltage Tolerance | Up to 3.6 V - allows interfacing with 3.3-V peripherals while powered from 1.8-V rail |
| Quiescent Current | 10 µA max - minimizes standby power in battery-sensitive portable and IoT applications |
| ESD Rating (HBM) | ±2000 V - meets industrial-grade robustness requirements for board-level handling and field operation |
Pinout & Package
SN74AUC1G125DBVR uses the 5-pin SOT-23 (DBV) package, measuring 2.90 mm × 1.60 mm, with exposed pad not present. Pin functions are validated per TI SCES382M Rev M (Aug 2022): OE (active-low enable), A (noninverting input), Y (3-state output), VCC (supply), GND (ground).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OE | Active-low output enable input | Drives Y to high-impedance when high; ties to VCC via pull-up for power-up safety |
| 2 - A | Noninverting logic input | Accepts 0.8–3.6-V signals; must be terminated to VCC or GND if unused |
| 3 - GND | Ground reference | Primary return path for output current and internal logic; requires low-inductance PCB connection |
| 4 - Y | 3-state buffered output | Drives A with same logic state when OE low; presents >10⁹ Ω impedance when OE high |
| 5 - VCC | Positive supply | Supplies core logic and output drivers; requires local 0.1-µF bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| ULTTL Output Architecture | Dynamic impedance control enables clean 50–65-Ω line driving ≤15 cm without external termination |
| Ioff Partial Power-Down | Prevents back-current flow when VCC = 0 V - critical for hot-plug and multi-rail power sequencing |
| Over-Voltage Tolerant I/Os | 3.6-V input/output tolerance independent of VCC - eliminates need for discrete level translators |
| NanoFree™ Packaging | Dies-as-packages (DSBGA option) reduce footprint by >50% vs SOT-23 - ideal for space-constrained mobile designs |
| Low-Power Operation | 10-µA max ICC enables always-on buffering in energy-harvesting and ultra-low-power sensor nodes |
Applications
| Memory Interface Redriving | FPGA I/O Expansion |
|---|---|
|
Use Scenario: Re-timing and strengthening DDR2/DDR3 data strobes and address lines between SoC and memory modules. IC Role / Device Role / Timing Role: Noninverting 3-state buffer providing signal integrity restoration and fanout extension with sub-3-ns delay budget. Use Value: Eliminates need for external series termination and reduces jitter accumulation across long trace runs. |
Use Scenario: Isolating and enabling/disabling peripheral buses (e.g., SPI, I²C, GPIO) connected to FPGA banks operating at mixed voltage levels. IC Role / Device Role / Timing Role: Voltage-tolerant bus switch enabling dynamic routing and power-gated subsystem control. Use Value: Supports 1.8-V FPGA core logic interfacing with 3.3-V sensors or displays without level-shifter ICs. |
| USB 2.0 Signal Conditioning | Industrial Sensor Hub Interface |
|
Use Scenario: Buffering USB D+/D− differential pair control signals in host-side hub controllers where ESD robustness and fast edge rates are required. IC Role / Device Role / Timing Role: Low-skew, high-drive buffer ensuring signal fidelity across split-plane PCB sections. Use Value: ±2000-V HBM rating protects against ESD events during cable insertion; 2.5-ns tpd preserves USB full-speed timing margins. |
Use Scenario: Aggregating and gating analog-to-digital converter (ADC) data streams and sensor interrupt lines in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: 3-state gate enabling time-division multiplexing of multiple sensor outputs onto shared data buses. Use Value: Ioff protection prevents backfeed into unpowered ADC channels during maintenance mode or firmware updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G125DBVR | Wider VCC range (1.65–5.5 V); lower drive (±24 mA @ 3.3 V); slower tpd (3.7 ns @ 3.3 V/30 pF) | Better suited for 3.3-V legacy systems; lacks 0.8-V operation and 3.6-V I/O tolerance | Select when interfacing with 5-V peripherals or requiring higher noise margin at 3.3 V |
| NC7SZ125P5X | Smaller SC70-5 package (2.0 × 1.25 mm); identical 1.65–1.95-V optimization; ±8-mA drive; 2.7-ns tpd @ 1.8 V | Same functional behavior but different thermal resistance (RθJA = 262.5°C/W vs 220.7°C/W for DBV) | Choose for tighter board area constraints where thermal headroom permits |
Compared with SN74LVC1G125DBVR and NC7SZ125P5X, the SN74AUC1G125DBVR delivers superior speed-power trade-off below 2.0 V, unique 3.6-V I/O tolerance, and lowest propagation delay in its voltage class - making it optimal for next-generation 1.8-V embedded interfaces demanding minimal latency and maximum signal fidelity.
Availability
SN74AUC1G125DBVR is available at Aetrix Electronics and suitable for high-speed memory interfaces, FPGA I/O expansion, USB signal conditioning, and industrial sensor hub designs requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for SN74AUC1G125DBVR 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-speed interface and low-power logic technologies.
The SN74AUC1G125 belongs to TI's AUC (Advanced Ultra-CMOS) logic family, engineered specifically for sub-2-V operation in portable, high-density, and high-frequency digital systems where signal integrity, power efficiency, and voltage flexibility are critical.
FAQ
What is the absolute maximum supply voltage for SN74AUC1G125DBVR?
The absolute maximum supply voltage (VCC) for SN74AUC1G125DBVR is 3.6 V, as specified in Section 6.1 of the TI SCES382M datasheet. Exceeding this rating may cause permanent damage. The device operates reliably within the recommended 0.8–2.7-V range, with optimal performance at 1.65–1.95 V.
Does SN74AUC1G125DBVR support partial power-down mode?
Yes, SN74AUC1G125DBVR supports partial power-down mode via its Ioff feature. When VCC = 0 V, the Ioff circuitry disables all outputs, limiting leakage to ±10 µA and preventing damaging back-current flow - essential for hot-swap and multi-rail power sequencing in systems using SN74AUC1G125DBVR.
Can SN74AUC1G125DBVR drive a 50-Ω transmission line directly?
Yes, SN74AUC1G125DBVR is designed to drive 50–65-Ω transmission lines directly without external termination. Its ULTTL output structure provides matched impedance and low reflection characteristics for traces under 15 cm, verified in TI's AUC application notes and confirmed in SN74AUC1G125DBVR switching characteristics tables.
What is the propagation delay of SN74AUC1G125DBVR at 1.8 V?
At 1.8 V supply and 30-pF load, SN74AUC1G125DBVR has a maximum propagation delay (tpd) of 2.5 ns, as documented in Section 6.7 of the TI SCES382M datasheet. Typical tpd is 1.5 ns under those conditions, supporting reliable operation above 250 MHz in re-driving applications.
Is SN74AUC1G125DBVR pin-compatible with other 5-pin logic buffers?
No - SN74AUC1G125DBVR uses the standard SOT-23-5 pinout (OE, A, GND, Y, VCC), but pin compatibility must be verified per function, not package alone. For example, SN74LVC1G125DBVR shares the same pinout and is functionally compatible, whereas SN74AUC1G04DBVR (inverter) has identical package but different logic function and pin mapping.
SN74AUC1G125DBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AUC
- 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:
- 9mA, 9mA
- Voltage - Supply:
- 0.8V ~ 2.7V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
SN74AUC1G125DBVR FAQ
1.How can I place an order for SN74AUC1G125DBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AUC1G125DBVR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of SN74AUC1G125DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AUC1G125DBVR is usually 5 days.
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Once your SN74AUC1G125DBVR 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 SN74AUC1G125DBVR?
For technical support, including SN74AUC1G125DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AUC1G125DBVR requirements.
6.How does Aetrix verify that SN74AUC1G125DBVR is sourced from the original manufacturer or authorized distributors?
All SN74AUC1G125DBVR 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 SN74AUC1G125DBVR meets industry standards.
7.What is the process for return or replacement of SN74AUC1G125DBVR?
All SN74AUC1G125DBVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AUC1G125DBVR, 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 SN74AUC1G125DBVR part is unused and in its original packaging.
Return procedure for SN74AUC1G125DBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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