Diodes Incorporated 74LVC2G126HK3-7

Overview

74LVC2G126HK3-7 from Diodes Incorporated is a dual 3-state buffer gate in X2-DFN1410-8 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 VCC = 3.0V). It enables voltage-level shifting and signal isolation in compact portable electronics.

For engineers reviewing the 74LVC2G126HK3-7 datasheet, 74LVC2G126HK3-7 pinout, 74LVC2G126HK3-7 application, or 74LVC2G126HK3-7 equivalent, key selection criteria include its dual-channel 3-state logic control, IOFF leakage suppression (<±10μA), DFN1410 footprint compatibility, and guaranteed operation across –40°C to +125°C ambient.

Technical Context

This device implements two independent non-inverting buffers, 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.

The integrated IOFF circuit disables both outputs when VCC = 0V, limiting backflow current to <±20μA - critical for hot-swap and partial-power-down systems. Schmitt-trigger inputs ensure noise immunity with 100mV typical hysteresis at 3.0V, supporting slow-rising signals without oscillation.

Key Specifications

Pinout & Package

X2-DFN1410-8 package: 1.35mm × 1.0mm × 0.35mm body, 0.35mm lead pitch, wettable flank terminals, exposed thermal pad (pin #4 GND).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC2G126DBVR, the 74LVC2G126HK3-7 reduces board area by 82% and improves thermal performance in dense layouts; versus 74LVC2G125HK3-7, it eliminates need for external inverters in non-inverting signal paths, reducing component count and propagation delay.

Availability

74LVC2G126HK3-7 is available at Aetrix Electronics and suitable for USB peripheral interfaces, mobile power sequencing, SD card level translation, and industrial sensor hubs requiring stable component supply and long-term manufacturability.

Supply support for 74LVC2G126HK3-7 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-reliability, energy-efficient components for consumer, industrial, and automotive markets.

The 74LVC logic family targets low-voltage, high-speed digital interfacing with emphasis on mixed-voltage compatibility, power-down safety, and miniature packaging - directly addressing design constraints in portable and IoT edge devices.

FAQ

Does 74LVC2G126HK3-7 support hot-swap insertion?

Yes - its IOFF circuit actively disables outputs and limits backflow current to ±20μA when VCC = 0V, preventing damage during live insertion into powered backplanes or docking stations. This behavior is guaranteed across –40°C to +125°C and requires no external circuitry.

Can 74LVC2G126HK3-7 translate 5V signals to a 1.8V system?

Yes - its inputs tolerate up to 5.5V regardless of VCC, allowing direct connection to 5V sources while powered from 1.8V. Outputs swing rail-to-rail (0V to 1.8V), providing clean logic levels compatible with 1.8V receivers without external resistors or clamps.

What is the thermal performance of the X2-DFN1410-8 package?

The X2-DFN1410-8 package has a junction-to-ambient thermal resistance (θJA) of 321°C/W under standard JEDEC test conditions (2oz copper, minimum pad layout). With proper PCB thermal vias under the exposed pad, real-world θJA can improve to ≤120°C/W, supporting continuous 24mA operation at +85°C ambient.

How does the Schmitt-trigger input improve system reliability?

The 100mV typical hysteresis at VCC = 3.0V prevents chatter on slow or noisy signals - such as mechanical switch closures or long cable runs - by enforcing distinct high/low thresholds. This eliminates multiple clock edges or false interrupts that would occur with standard CMOS inputs under identical conditions.