My Inquiry
My Account
Texas Instruments SN74AUC1G125DCKR
- Part No.:
- SN74AUC1G125DCKR
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SN74AUC1G125DCKR.pdf
- Description:
- IC BUFFER NON-INVERT 2.7V SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:12,536
Please send an inquiry. Send us your inquiry, and we will respond immediately.
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 maximum propagation delay at 1.8 V/30 pF, 0.8–2.7-V operating voltage range, and over-voltage tolerant I/Os supporting up to 3.6 V independent of VCC. It serves as a high-speed signal redriver in compact portable logic interfaces.
For engineers reviewing the SN74AUC1G125 datasheet, SN74AUC1G125 pinout, SN74AUC1G125 application, or SN74AUC1G125 equivalent, key selection criteria include its NanoFree™/SC70 package compatibility, Ioff-enabled partial power-down capability, ultra-low-voltage TTL (ULTTL) output structure for 50–65-Ω transmission line driving, and guaranteed 250-MHz operation under 15-pF load.
Technical Context
The SN74AUC1G125 implements a noninverting 3-state buffer with active-low output-enable (OE) control, where Y = A when OE is low and Y = high-impedance when OE is high. Its ULTTL output stage provides matched sourcing/sinking capability and dynamic impedance control during transitions to suppress ringing on moderate-length PCB traces.
It supports true partial-power-down operation via Ioff circuitry that disables outputs and limits back-drive current when VCC = 0 V, while maintaining over-voltage tolerance on all I/O pins up to 3.6 V regardless of supply state. The device is fully characterized from –40°C to +85°C and specified for 0.8–2.7-V VCC, with optimal performance between 1.65 V and 1.95 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 0.8 V to 2.7 V - enables direct interface with 1.2-V, 1.8-V, and 2.5-V logic domains without level shifting. |
| Max Propagation Delay | 2.5 ns at 1.8 V, 30-pF load - supports >250-MHz data rates in point-to-point routing with controlled-impedance lines. |
| Output Drive Strength | ±8 mA at 1.8 V - sufficient to drive 50–65-Ω transmission lines up to 15 cm without external termination. |
| I/O Over-Voltage Tolerance | Up to 3.6 V independent of VCC - allows safe interfacing with higher-voltage peripherals or hot-swap scenarios. |
| Ioff Current | ±10 µA max at 2.7 V - ensures negligible leakage and robust back-drive protection during system power sequencing. |
| Quiescent ICC | 10 µA max - minimizes standby power in battery-powered or always-on subsystems. |
| ESD Rating (HBM) | ±2000 V - meets industrial-grade ESD immunity requirements per ANSI/ESDA/JEDEC JS-001. |
Pinout & Package
SN74AUC1G125DCKR uses the SC70-5 (DCK) package: 2.00 mm × 1.25 mm body size, 0.65-mm lead pitch, surface-mount, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OE | Active-low output enable input | Drives Y to high-impedance when high; must be pulled up to VCC during power-up/down to ensure defined Z-state. |
| 2 - A | Noninverting logic input | Accepts 0.8–2.7-V logic signals; over-voltage tolerant to 3.6 V; requires tie-off to VCC or GND if unused. |
| 3 - GND | Ground reference | Primary return path for output current and internal logic; requires low-inductance connection to system ground plane. |
| 4 - Y | 3-state buffered output | Delivers rail-to-rail CMOS-compatible output when enabled; presents high-Z (≤±10 µA leakage) when disabled. |
| 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™ SC70 package | Dies-as-package construction reduces footprint to 2.00 mm × 1.25 mm - ideal for space-constrained mobile and wearables PCBs. |
| ULTTL output architecture | Dynamic impedance control delivers clean edges into 50–65-Ω lines ≤15 cm without external termination resistors. |
| Ioff partial power-down | Disables outputs and blocks reverse current flow when VCC = 0 V - critical for multi-rail systems with staggered power sequencing. |
| Over-voltage tolerant I/Os | All pins withstand 3.6 V regardless of VCC state - eliminates need for external clamping diodes in mixed-voltage interconnects. |
| Low ICC and Cpd | 10-µA max quiescent current and 2-pF typical input capacitance minimize loading and dynamic power in high-density logic arrays. |
Applications
| High-Speed Signal Redriving | Logic-Level Translation Interface |
|---|---|
|
Use Scenario: Reconditioning degraded clock or data signals across long PCB traces or flex cables in portable SSD controllers. IC Role / Device Role / Timing Role: Noninverting 3-state buffer redriving LVCMOS signals with minimal added jitter and no DC-level shift. Use Value: Restores edge integrity and timing margin using only 1.8-V supply and no external components - reduces BOM count and layout area. |
Use Scenario: Isolating and enabling bidirectional data paths between 1.2-V SoC I/O banks and 1.8-V peripheral sensors. IC Role / Device Role / Timing Role: Direction-controlled bus buffer enabling synchronous read/write handshaking without voltage translation ICs. Use Value: Leverages 3.6-V I/O tolerance to safely accept 1.8-V inputs while operating from 1.2-V VCC - avoids level shifter latency and power overhead. |
| Partial-Power-Down System Control | Hot-Swap Capable Peripheral Enable |
|
Use Scenario: Managing power states in modular IoT edge nodes where sensor clusters power down independently of host MCU. IC Role / Device Role / Timing Role: Gate controlling enable lines to downstream regulators or ADCs, with Ioff preventing backfeed during VCC ramp-down. Use Value: Eliminates risk of latch-up or damage during uncontrolled power sequencing - certified to JESD78 Class II latch-up (>100 mA). |
Use Scenario: Enabling/disabling USB or I²C peripherals in field-replaceable modules where connectors may be mated under power. IC Role / Device Role / Timing Role: Output-enable controlled buffer isolating hot-plug I/O from main system bus during insertion/removal events. Use Value: 3.6-V tolerant I/Os survive transient overvoltage spikes during mating; high-Z state prevents bus contention before firmware initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G125DCKR | 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), no Ioff. | Supports legacy 3.3-V systems but lacks over-voltage tolerance and partial power-down capability. | Choose when interfacing with 3.3-V or 5-V logic and Ioff is not required; avoid in 1.8-V-only or multi-rail sequenced designs. |
| NC7SZ125P5X | Smaller SC70-5 footprint (1.6 × 1.6 mm), same 1.65–3.6-V range, ±24 mA @ 3.3 V, tpd = 3.5 ns @ 3.3 V/50 pF, no Ioff. | Offers tighter layout density but no 3.6-V I/O tolerance or Ioff - limited to single-supply, non-hot-swap use cases. | Prefer for ultra-compact 3.3-V designs where space is critical and power sequencing is simple; verify I/O voltage compatibility. |
Compared with SN74LVC1G125DCKR and NC7SZ125P5X, SN74AUC1G125DCKR uniquely combines 1.8-V optimization, 3.6-V I/O tolerance, and Ioff - making it the only choice for robust, low-voltage, multi-rail portable systems requiring guaranteed high-Z behavior during power transitions.
Availability
SN74AUC1G125DCKR is available at Aetrix Electronics and suitable for high-speed signal redriving, logic-level interface isolation, and partial-power-down system control requiring stable component supply across consumer, industrial, and automotive electronics programs.
Supply support for SN74AUC1G125DCKR 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, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
SN74AUC1G125 belongs to TI's AUC sub-1-V Little Logic family, engineered specifically for speed and signal integrity in ultra-low-voltage digital interfaces - targeting portable, battery-powered, and space-constrained applications demanding <3 ns propagation delay and minimal power.
FAQ
What is the maximum operating frequency supported by SN74AUC1G125DCKR?
SN74AUC1G125DCKR supports reliable operation above 250 MHz under optimal conditions: 1.8-V supply, 15-pF load, and proper PCB layout with controlled-impedance routing. This is validated by its 2.5-ns maximum propagation delay at 1.8 V/30 pF and documented 500-Mbps capability in TI application notes - though actual system frequency depends on trace length, termination, and noise margin.
Does SN74AUC1G125DCKR require external pull-up or pull-down resistors on its inputs?
Yes - all unused inputs of SN74AUC1G125DCKR, including A and OE, must be tied to VCC or GND to prevent floating states that cause excessive power consumption or oscillation. A 10-kΩ resistor is recommended for OE to ensure high-impedance output during power-up; A should be tied to VCC or GND based on functional requirement, never left open.
Can SN74AUC1G125DCKR interface safely between 1.8-V and 3.3-V logic domains?
SN74AUC1G125DCKR can accept 3.3-V inputs safely due to its 3.6-V over-voltage tolerant I/Os, but its outputs swing only from GND to VCC (max 2.7 V). To drive a 3.3-V receiver, VCC must be set to ≥3.0 V - however, SN74AUC1G125DCKR's recommended VCC range ends at 2.7 V. Therefore, it is not suitable as a 1.8-V-to-3.3-V translator; use SN74LVC1G125DCKR instead for that function.
What is the purpose of the Ioff feature in SN74AUC1G125DCKR?
The Ioff feature in SN74AUC1G125DCKR disables all outputs and limits leakage current to ±10 µA when VCC = 0 V, preventing damaging back-current flow from powered sections of the system into unpowered ones. This is essential for robust power sequencing in multi-rail devices like smartphones or modular IoT hardware where subsystems power up/down independently.
Which package variant does SN74AUC1G125DCKR use, and what are its mechanical dimensions?
SN74AUC1G125DCKR uses the SC70-5 (DCK) package: a 5-pin, surface-mount, RoHS-compliant package with nominal body dimensions of 2.00 mm × 1.25 mm and 0.65-mm lead pitch. It is distinct from the SOT-23 (DBV) and DSBGA (YZP) variants - this specific part number is orderable only in SC70 packaging per TI's official packaging addendum.
SN74AUC1G125DCKR 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
SN74AUC1G125DCKR FAQ
1.How can I place an order for SN74AUC1G125DCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AUC1G125DCKR 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 SN74AUC1G125DCKR reliable?
The price and inventory of SN74AUC1G125DCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AUC1G125DCKR is usually 5 days.
3.What payment methods are accepted for SN74AUC1G125DCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AUC1G125DCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AUC1G125DCKR?
SN74AUC1G125DCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AUC1G125DCKR 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 SN74AUC1G125DCKR?
For technical support, including SN74AUC1G125DCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AUC1G125DCKR requirements.
6.How does Aetrix verify that SN74AUC1G125DCKR is sourced from the original manufacturer or authorized distributors?
All SN74AUC1G125DCKR 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 SN74AUC1G125DCKR meets industry standards.
7.What is the process for return or replacement of SN74AUC1G125DCKR?
All SN74AUC1G125DCKR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AUC1G125DCKR, 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 SN74AUC1G125DCKR part is unused and in its original packaging.
Return procedure for SN74AUC1G125DCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74AUC1G125DCKR Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
