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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Texas Instruments CAUC1G125MDCKREP

Name: CAUC1G125MDCKREP
Brand: Texas Instruments
SKU: CAUC1G125MDCKREP
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CAUC1G125MDCKREP

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 5-TSSOP, SC-70-5, SOT-353

Datasheet:: CAUC1G125MDCKREP.pdf

Description:: IC BUFFER NON-INVERT 2.7V SC70-5

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Product details

Overview

CAUC1G125MDCKREP from Texas Instruments is a single-channel 3-state bus buffer gate optimized for 1.65–1.95 V operation, delivering 2.5 ns max propagation delay at 1.8 V, ±8 mA output drive, and I_off support for partial-power-down mode in extended-temperature (–55°C to 125°C) industrial systems.

For engineers reviewing the CAUC1G125MDCKREP datasheet, CAUC1G125MDCKREP pinout, CAUC1G125MDCKREP application, or CAUC1G125MDCKREP equivalent, key selection criteria include sub-1.8-V logic compatibility, 3-state output isolation integrity, low ICC (≤10 µA), and SC-70 (DCK) package footprint constraints in space-constrained digital interface designs.

Technical Context

The CAUC1G125MDCKREP implements a noninverting buffer with active-low 3-state control: output Y follows input A when OE is low; Y enters high-impedance state when OE is high. Its I_off circuitry blocks current backflow during power sequencing, enabling safe mixed-voltage domain interfacing.

Designed for 0.8–2.7 V V_CC operation but specified for 1.65–1.95 V, it supports 3.6-V tolerant I/O, allowing connection to higher-voltage logic without level shifters. Input thresholds scale with V_CC (VIH = 0.65×V_CC, VIL = 0.35×V_CC), ensuring robust noise margins across supply variations.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	0.8 V to 2.7 V - supports ultra-low-voltage operation down to 0.8 V while being fully characterized at 1.65–1.95 V
Max t_pd	2.5 ns at 1.8 V - enables high-speed data buffering in sub-3 ns timing-critical paths
Output Drive	±8 mA at 1.65 V - sufficient to drive 15 pF loads with clean edges in compact PCB layouts
I_CC Max	10 µA - minimizes quiescent power in always-on system management circuits
I_off	±10 µA at 0 V V_CC - prevents damaging back-current during hot-insertion or staggered power-up
Operating Temp	–55°C to 125°C - qualified per JEDEC HAST, temperature cycle, and autoclave testing for aerospace/industrial use
ESD Rating	2000-V HBM - protects against handling damage in automated assembly and field service

Pinout & Package

CAUC1G125MDCKREP is housed in a 5-pin SC-70 (DCK) package - 2.0 mm × 1.25 mm footprint, 0.65 mm pitch, thin-profile surface-mount design suitable for high-density routing and thermal-limited applications.

Pin/Terminal	Circuit Role	Design Meaning
1 (A)	Input	Data input signal; CMOS-compatible, rail-to-rail swing, VIH/VIL scaling with V_CC
2 (Y)	Output	Noninverting buffered output; 3-state capable, 3.6-V tolerant, ±8 mA drive
3 (OE)	Output Enable	Active-low enable; must be pulled up to V_CC via external resistor for defined Hi-Z at power-up
4 (GND)	Ground	Reference return path for all signals and power; requires low-inductance PCB connection
5 (V_CC)	Supply	Core logic supply; decoupling capacitor (0.1 µF) required within 3 mm of pin

Key Features

Feature	Design Value
Sub-1.8-V Optimized Operation	Guaranteed functionality at 1.65–1.95 V V_CC, enabling direct integration with modern low-power SoCs and FPGAs
3.6-V I/O Tolerance	Allows connection to 3.3-V or 2.5-V buses without external level translators, reducing BOM count and layout complexity
I_off Partial-Power-Down Support	Prevents reverse current flow when V_CC = 0 V, critical for hot-swap and multi-rail power sequencing compliance
Extended Temperature Qualification	Validated per JEDEC JESD22-A108 (HAST), JESD22-A104 (Temp Cycle), and JESD22-A110 (Autoclave) for mission-critical reliability
Low Dynamic Power	Typical C_pd = 15 pF at 1.8 V - reduces switching power dissipation in high-frequency enable/disable cycling

Applications

Industrial Sensor Interface	Space-Constrained FPGA I/O Expansion
Use Scenario: Isolating analog sensor ADC outputs from noisy digital control logic in programmable logic controllers. IC Role / Device Role / Timing Role: 3-state buffer isolating SPI/Microwire data lines during processor sleep or reconfiguration cycles. Use Value: Prevents bus contention and leakage-induced offset errors using I_off-enabled high-impedance state at 0 V V_CC.	Use Scenario: Expanding I/O count on a Xilinx Artix-7 FPGA where board real estate limits use of larger packages. IC Role / Device Role / Timing Role: Level-shifting and buffering between 1.8-V FPGA banks and 3.3-V peripheral modules. Use Value: Eliminates need for discrete level translators by leveraging 3.6-V I/O tolerance and 2.5 ns t_pd for timing closure.
Aerospace Data Acquisition Bus	Automotive Body Control Module
Use Scenario: Enabling/disabling sensor data streams on a MIL-STD-1553 or ARINC-429 auxiliary bus controller. IC Role / Device Role / Timing Role: Single-line bus driver with fail-safe Hi-Z default state during cold-start or reset sequences. Use Value: Meets –55°C to 125°C qualification and latch-up immunity (>100 mA per JESD78 Class II) for flight-critical subsystems.	Use Scenario: Managing communication between a 1.8-V microcontroller and legacy 5-V LIN transceivers in door module ECUs. IC Role / Device Role / Timing Role: Voltage-tolerant buffer enabling mixed-supply interoperability without additional regulators. Use Value: Reduces component count and improves EMI margin via low-noise 10 µA I_CC and controlled edge rates (10 ns/V).

Industrial Sensor Interface

Space-Constrained FPGA I/O Expansion

Use Scenario: Isolating analog sensor ADC outputs from noisy digital control logic in programmable logic controllers.

IC Role / Device Role / Timing Role: 3-state buffer isolating SPI/Microwire data lines during processor sleep or reconfiguration cycles.

Use Value: Prevents bus contention and leakage-induced offset errors using I_off-enabled high-impedance state at 0 V V_CC.

Use Scenario: Expanding I/O count on a Xilinx Artix-7 FPGA where board real estate limits use of larger packages.

IC Role / Device Role / Timing Role: Level-shifting and buffering between 1.8-V FPGA banks and 3.3-V peripheral modules.

Use Value: Eliminates need for discrete level translators by leveraging 3.6-V I/O tolerance and 2.5 ns t_pd for timing closure.

Aerospace Data Acquisition Bus

Automotive Body Control Module

Use Scenario: Enabling/disabling sensor data streams on a MIL-STD-1553 or ARINC-429 auxiliary bus controller.

IC Role / Device Role / Timing Role: Single-line bus driver with fail-safe Hi-Z default state during cold-start or reset sequences.

Use Value: Meets –55°C to 125°C qualification and latch-up immunity (>100 mA per JESD78 Class II) for flight-critical subsystems.

Use Scenario: Managing communication between a 1.8-V microcontroller and legacy 5-V LIN transceivers in door module ECUs.

IC Role / Device Role / Timing Role: Voltage-tolerant buffer enabling mixed-supply interoperability without additional regulators.

Use Value: Reduces component count and improves EMI margin via low-noise 10 µA I_CC and controlled edge rates (10 ns/V).

Equivalent & Alternatives

The following parts are listed as comparable options for similar bus buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74AUC1G125DBVR	Same core logic, SOT-23-5 (DBV) package - 2.9 mm × 1.6 mm, 0.95 mm pitch, higher thermal resistance (θ_JA = 212°C/W vs. 252°C/W)	Less suitable for ultra-dense layouts; better heat dissipation under sustained load	Select DBVR only if board-level thermal management allows larger footprint and higher power density is needed
SN74LVC1G125DBVR	Wider V_CC range (1.65–5.5 V), higher t_pd (3.7 ns @ 3.3 V), lower drive (±24 mA @ 3.3 V), no I_off support	Compatible with 5-V legacy systems but lacks partial-power-down capability for modern low-power architectures	Choose LVC version only when interfacing with 5-V peripherals and I_off is not required

Compared with SN74AUC1G125DBVR and SN74LVC1G125DBVR, CAUC1G125MDCKREP provides the smallest footprint, lowest propagation delay at 1.8 V, and unique I_off protection-making it optimal for miniaturized, thermally constrained, and multi-rail power-gated systems.

Availability

CAUC1G125MDCKREP is available at Aetrix Electronics and suitable for industrial sensor interfaces, aerospace data acquisition systems, automotive body control modules, and FPGA I/O expansion requiring stable component supply across extended temperature ranges.

Supply support for CAUC1G125MDCKREP 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 90 years of innovation in high-reliability electronics.

The SN74AUC1G125 family delivers ultra-high-speed, low-voltage logic buffers for next-generation portable, industrial, and aerospace systems demanding sub-3 ns timing and extended-temperature resilience.

FAQ

What is the recommended pull-up resistor value for OE on CAUC1G125MDCKREP?

The OE pin of CAUC1G125MDCKREP must be tied to V_CC through a pull-up resistor to ensure high-impedance state at power-up. The minimum resistor value depends on the current-sinking capability of the driving source; TI recommends ≥10 kΩ for typical 1.8-V systems, balancing rise time and power consumption. Values below 4.7 kΩ may increase static current without improving enable timing.

Does CAUC1G125MDCKREP support true 3.3-V I/O interfacing?

Yes, CAUC1G125MDCKREP supports 3.6-V tolerant I/O, meaning it can safely accept and drive signals up to 3.6 V regardless of V_CC level. When V_CC = 1.8 V, the device drives outputs to VOH ≥ 1.2 V and VOL ≤ 0.45 V while accepting VIH ≥ 1.17 V - enabling reliable interfacing with 3.3-V LVTTL and LVCMOS systems without external level shifters.

Is CAUC1G125MDCKREP qualified for aerospace applications?

Yes, CAUC1G125MDCKREP is an enhanced-product (EP) variant qualified per MIL-PRF-38535 and JEDEC standards including HAST, temperature cycling, and autoclave testing. It operates from –55°C to 125°C and meets JESD78 Class II latch-up immunity (>100 mA), making it suitable for satellite payload data conditioning, avionics sensor hubs, and flight-critical subsystems requiring extended reliability.

What is the maximum capacitive load CAUC1G125MDCKREP can drive at 1.8 V?

CAUC1G125MDCKREP is characterized with CL = 30 pF for timing specifications (tpd = 2.5 ns max), and its ±8 mA output drive at 1.8 V supports typical PCB trace + connector + receiver capacitance up to 30–40 pF. For loads exceeding 30 pF, propagation delay increases linearly; TI's characterization shows tpd ≈ 5.5 ns at CL = 50 pF, confirming usable performance up to ~45 pF with marginal timing margin.

How does I_off function in CAUC1G125MDCKREP during partial power-down?

In CAUC1G125MDCKREP, the I_off circuitry actively disables both input and output terminals when V_CC = 0 V, limiting leakage current to ±10 µA even with applied signals up to 3.6 V. This prevents back-current from powered downstream logic into the unpowered buffer, satisfying IEC 61000-4-2 system-level ESD robustness and enabling safe hot-plug operation in modular industrial backplanes.

CAUC1G125MDCKREP 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:: -55°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-70-5

CAUC1G125MDCKREP FAQ

1.How can I place an order for CAUC1G125MDCKREP through Aetrix?

Please submit a Request for Quotation (RFQ) for CAUC1G125MDCKREP 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 CAUC1G125MDCKREP reliable?

The price and inventory of CAUC1G125MDCKREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CAUC1G125MDCKREP is usually 5 days.

3.What payment methods are accepted for CAUC1G125MDCKREP?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CAUC1G125MDCKREP transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CAUC1G125MDCKREP?

CAUC1G125MDCKREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CAUC1G125MDCKREP 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 CAUC1G125MDCKREP?

For technical support, including CAUC1G125MDCKREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CAUC1G125MDCKREP requirements.

6.How does Aetrix verify that CAUC1G125MDCKREP is sourced from the original manufacturer or authorized distributors?

All CAUC1G125MDCKREP 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 CAUC1G125MDCKREP meets industry standards.

7.What is the process for return or replacement of CAUC1G125MDCKREP?

All CAUC1G125MDCKREP units undergo pre-shipment inspection (PSI). If there is an issue with CAUC1G125MDCKREP, 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 CAUC1G125MDCKREP part is unused and in its original packaging.

Return procedure for CAUC1G125MDCKREP:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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