Diodes Incorporated 74LVC2G126HD4-7

Overview

74LVC2G126HD4-7 from Diodes Incorporated is a dual non-inverting 3-state buffer IC in X2-DFN2010-8 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 space-constrained portable electronics.

For engineers reviewing the 74LVC2G126HD4-7 datasheet, 74LVC2G126HD4-7 pinout, 74LVC2G126HD4-7 application, or 74LVC2G126HD4-7 equivalent, key selection criteria include its dual-channel 3-state logic control, IOFF leakage suppression (<±20μA), DFN2010 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). Input tolerance up to 5.5V allows interfacing with higher-voltage logic domains without level-shifting circuitry.

The IOFF feature disables both output paths when VCC = 0V, limiting backflow current to <±20μA - critical for hot-swap and multi-rail system integrity. Schmitt-trigger inputs ensure robust noise immunity with 100mV hysteresis at 3.0V, accommodating slow-rising signals in battery-powered peripherals.

Key Specifications

Pinout & Package

X2-DFN2010-8 package: 1.95mm × 1.0mm × 0.4mm body, 0.5mm lead pitch, bottom thermal pad, moisture sensitivity level 1 (MSL1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC2G126DBVR, the 74LVC2G126HD4-7 offers 40% smaller footprint and 3× lower θJA (313°C/W vs. 218°C/W) due to thermal pad; versus 74LVC2G125HD4-7, it preserves signal polarity critical for transparent bus buffering without additional logic inversion.

Availability

74LVC2G126HD4-7 is available at Aetrix Electronics and suitable for USB-C docking stations, industrial sensor nodes, laptop peripheral interfaces, and automotive infotainment displays requiring stable component supply and long-term lifecycle assurance.

Supply support for 74LVC2G126HD4-7 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 industrial, computing, and consumer markets.

The 74LVC logic family targets low-voltage, high-speed digital interfacing in space- and power-constrained applications - designed specifically for voltage translation, bus isolation, and mixed-signal system integration.

FAQ

What is the maximum allowable input voltage when VCC = 0V?

The 74LVC2G126HD4-7 supports 5.5V-tolerant inputs regardless of VCC state. When VCC = 0V, inputs may be held at up to 5.5V without damage, and IOFF limits leakage to <±20μA - enabling safe hot-insertion into live backplanes or mixed-rail systems.

Does this device require external pull-up or pull-down resistors on OE pins?

No. The OE inputs are CMOS-compatible with rail-to-rail logic thresholds (VIH ≥ 0.65×VCC, VIL ≤ 0.35×VCC). When driven directly from same-supply logic, external biasing is unnecessary; however, unused OE pins must be tied to VCC or GND per datasheet Note 9 to prevent floating states.

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

With 100mV typical hysteresis at 3.0V, the Schmitt-trigger input requires separate voltage thresholds for rising (VIH) and falling (VIL) edges - preventing oscillation on slow or noisy signals. This eliminates need for external RC filtering in applications like pushbutton interfaces or long-trace sensor lines.

Can this device be used for bidirectional data flow like a transceiver?

No. The 74LVC2G126HD4-7 is strictly unidirectional: each channel has dedicated input (1A/2A) and output (1Y/2Y) pins. For bidirectional bus control, a true transceiver (e.g., 74LVC2T45) or discrete directional control logic is required.