Diodes Incorporated 74LVC2G126RA3-7

Overview

74LVC2G126RA3-7 from Diodes Incorporated is a dual non-inverting 3-state buffer IC in X2-DFN1210-8 package, operating from 1.65V to 5.5V supply, delivering ±24mA output drive at 3.3V with IOFF-enabled partial power-down protection and Schmitt-trigger inputs (100mV hysteresis at 3.0V). It enables voltage-level shifting and signal isolation in compact portable electronics.

For engineers reviewing the 74LVC2G126RA3-7 datasheet, 74LVC2G126RA3-7 pinout, 74LVC2G126RA3-7 application, or 74LVC2G126RA3-7 equivalent, key selection criteria include its 1.2mm × 1.0mm DFN footprint, dual independent 3-state control (1OE/2OE), IOFF leakage <±20μA during power-down, and guaranteed operation across –40°C to +125°C.

Technical Context

This device implements two independent CMOS buffer channels, each with active-high output enable (1OE, 2OE) controlling high-impedance (Z) state on respective outputs (1Y, 2Y). Inputs accept up to 5.5V regardless of VCC, enabling robust level translation between mixed-voltage domains.

Its IOFF circuitry actively disables both outputs when VCC = 0V, blocking reverse current flow (>±50mA clamp rating) - critical for hot-swap and partial-power-down systems. Schmitt-trigger inputs tolerate slow-rising signals (10ns/V min transition rate at 2.7–5.5V), reducing noise susceptibility without external hysteresis components.

Key Specifications

Pinout & Package

X2-DFN1210-8 (1.2mm × 1.0mm × 0.35mm, 0.3mm lead pitch) surface-mount package with exposed thermal pad (pin #4 GND connected internally).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC2G126DBVR and 74LVC2G126GMH8X, the 74LVC2G126RA3-7 offers the smallest PCB footprint (1.2mm × 1.0mm), lowest assembly cost for high-volume portable production, and optimal thermal resistance for passive cooling in sealed enclosures - making it the preferred choice for space- and power-constrained consumer electronics.

Availability

74LVC2G126RA3-7 is available at Aetrix Electronics and suitable for USB OTG interface design, MIPI DSI signal conditioning, and industrial sensor hub level-shifting requiring stable component supply and consistent DFN1210 sourcing.

Supply support for 74LVC2G126RA3-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-efficiency power management, signal integrity, and precision timing solutions for industrial, computing, and consumer markets.

The 74LVC logic family targets low-voltage, high-speed digital interfacing with robust mixed-voltage operation - designed specifically for portable electronics, IoT edge nodes, and space-constrained embedded systems requiring minimal power and footprint.

FAQ

What is the maximum allowable input voltage on 1A/2A pins when VCC = 1.8V?

The 74LVC2G126RA3-7 features 5.5V-tolerant inputs: 1A and 2A accept voltages from –0.5V to +6.5V regardless of VCC level. At VCC = 1.8V, inputs may safely swing up to 5.5V, enabling direct connection to higher-voltage controllers without external level shifters - verified per Absolute Maximum Ratings table (VI = –0.5 to +6.5V).

Does the device support hot insertion when VCC is unpowered?

Yes - the IOFF circuitry activates automatically when VCC = 0V, disabling both outputs and limiting leakage current to ±20μA max. This prevents damaging back-current flow from live signal lines into the unpowered IC, satisfying hot-swap requirements in modular systems like docking stations and expansion cards - confirmed in Recommended Operating Conditions and Electrical Characteristics sections.

How does the Schmitt-trigger input improve noise immunity compared to standard CMOS inputs?

Schmitt-trigger inputs provide 100mV typical hysteresis at VCC = 3.0V, meaning the rising threshold (VIH) is ~100mV higher than the falling threshold (VIL). This prevents multiple output toggles when input signals cross the switching point slowly or with noise - critical for reliable reset, enable, or interrupt signaling in electrically noisy environments like motor-driven industrial equipment.

What is the thermal resistance (θJA) of the X2-DFN1210-8 package, and how does it impact power dissipation?

The X2-DFN1210-8 package has θJA = 395°C/W (measured on FR-4 with 2oz copper and minimum recommended pads). At max ICC = 40μA and worst-case output loading, junction temperature rise remains under 0.02°C - confirming negligible self-heating. This allows full-spec operation in sealed, fanless enclosures up to +125°C ambient without derating - validated in Package Characteristics table and Absolute Maximum Ratings.