Texas Instruments 74AUC2G126DCURG4

Overview

74AUC2G126DCURG4 from Texas Instruments is a dual 3-state bus buffer gate optimized for 1.8-V operation, delivering ±8-mA output drive at 1.8 V, sub-1-V operability down to 0.8 V, and max propagation delay of 1.9 ns at 1.8 V. It serves as a level-shifting, bidirectional bus interface in low-voltage portable logic systems such as mobile SoC interconnects and battery-powered sensor hubs.

For engineers reviewing the 74AUC2G126DCURG4 datasheet, 74AUC2G126DCURG4 pinout, 74AUC2G126DCURG4 application, or 74AUC2G126DCURG4 equivalent, key selection criteria include its Ioff partial-power-down support, 3.6-V I/O tolerance for mixed-mode interfacing, 10 µA ICC at 1.8 V, and VSSOP-8 (DCU) package compatibility with high-density PCB layouts.

Technical Context

This device implements two independent noninverting buffers, each with dedicated 3-state output-enable (OE) control. Each channel operates across 0.8 V–2.7 V VCC but is specifically characterized for 1.65 V–1.95 V supply range, enabling reliable operation in modern ultra-low-voltage domains.

Its Ioff circuitry actively disables outputs during power-down to prevent backflow current, while ±8-mA drive strength at 1.8 V supports driving 15-pF loads with sub-2-ns timing-critical for high-speed data path isolation in multi-rail systems.

Key Specifications

Pinout & Package

VSSOP-8 (DCU) package: 2.0 mm × 1.25 mm, 0.5-mm pitch, 0.9-mm max height, exposed pad optional per JEDEC MO-187 variation CA.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 3-state buffer applications.

Compared with SN74LVC2G126DCUR and 74AUP2G126DCUR, the 74AUC2G126DCURG4 uniquely balances sub-1-V operation, 1.9-ns speed, and 8-mA drive at 1.8 V-making it the preferred choice for high-efficiency, high-speed 1.8-V bus isolation where both performance and ultra-low voltage support are required.

Availability

74AUC2G126DCURG4 is available at Aetrix Electronics and suitable for mobile SoC interconnect, wearable display interface, and industrial sensor hub applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant VSSOP packaging.

Supply support for 74AUC2G126DCURG4 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, energy-efficient components.

The AUC Little Logic family-including the 74AUC2G126DCURG4-is engineered for sub-1-V to 2.7-V operation in space-constrained, battery-sensitive applications such as portable medical devices, wearables, and IoT edge nodes.

FAQ

What is the minimum operating voltage for the 74AUC2G126DCURG4?

The 74AUC2G126DCURG4 operates down to 0.8 V VCC, with full functionality specified from 0.8 V to 2.7 V. Its design is optimized for 1.65 V to 1.95 V, making it ideal for modern 1.8-V systems and compatible with sub-1-V brown-out conditions. At 0.8 V, parameters such as tpd and drive strength are characterized per TI's SCES533C datasheet.

Does the 74AUC2G126DCURG4 support mixed-voltage I/O interfacing?

Yes, the 74AUC2G126DCURG4 supports 3.6-V I/O tolerance-inputs and outputs safely accept voltages up to 3.6 V regardless of VCC level. This enables direct interfacing between 1.8-V logic and 3.3-V peripherals without external level shifters, simplifying design and improving signal integrity in mixed-rail systems.

How does the Ioff feature function in the 74AUC2G126DCURG4?

The Ioff circuitry in the 74AUC2G126DCURG4 disables all outputs when VCC = 0 V, preventing damaging back-current flow through the device during partial power-down or hot-swap events. This feature is fully characterized per JESD78 Class II latch-up standards and is critical for modular systems where subsystems power up/down independently.

What package type is used for the 74AUC2G126DCURG4?

The 74AUC2G126DCURG4 uses the VSSOP-8 (DCU) package: 2.0 mm × 1.25 mm footprint, 0.5-mm lead pitch, and 0.9-mm maximum height. It complies with JEDEC MO-187 variation CA and supports standard reflow profiles (MSL Level-1). The NanoFree™ construction eliminates traditional leadframes, enhancing thermal performance and miniaturization.

Can the 74AUC2G126DCURG4 replace the SN74AUC2G126DCUR in existing designs?

Yes-the 74AUC2G126DCURG4 is a functionally identical, drop-in replacement for SN74AUC2G126DCUR. Both share identical electrical specifications, pinout, package (VSSOP-8 DCU), and thermal characteristics. The "G4" suffix denotes TI's green (lead-free, halogen-free) material set and does not affect performance or compatibility.