Diodes Incorporated 74LVC1G126Z-7

Overview

74LVC1G126Z-7 from Diodes Incorporated is a single non-inverting 3-state buffer IC designed for voltage-level shifting and bus isolation in mixed-voltage digital systems. It operates from 1.65V to 5.5V, tolerates 5.5V inputs, delivers ±24mA output drive at 3.3V, and features IOFF circuitry for partial power-down protection-enabling use in portable computing and peripheral interfaces.

For engineers reviewing the 74LVC1G126Z-7 datasheet, 74LVC1G126Z-7 pinout, 74LVC1G126Z-7 application, or 74LVC1G126Z-7 equivalent, key selection criteria include its 1.65–5.5V supply range, 5.5V-tolerant inputs, 3-state enable timing (tpd ≤ 6.0 ns @ 3.3V), thermal resistance (θJA = 231°C/W), and SOT553 package footprint compatibility with space-constrained PCB layouts.

Technical Context

This device implements a CMOS-based non-inverting buffer with active-high output enable (OE), where Y = A when OE = HIGH and Y = high-impedance when OE = LOW. Its IOFF circuit disables both output FETs during power-down, preventing backflow current when VCC = 0V while inputs or outputs remain biased at up to 5.5V.

The logic family complies with LVC specifications: input thresholds scale with VCC (VIH ≥ 0.65×VCC at 1.65–1.95V; ≥ 0.7×VCC at 4.5–5.5V), propagation delay is 0.5–6.0 ns across 1.8–5.0V, and it supports direct TTL-level interfacing due to guaranteed VIH/VIL margins at 3.3V and 5V rails.

Key Specifications

Pinout & Package

SOT553 (1.6 mm × 1.6 mm × 0.62 mm, 0.5 mm pitch) - ultra-compact leaded package optimized for high-density portable PCBs with manual rework capability and standard reflow compatibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G126DBVR, the 74LVC1G126Z-7 saves 64% board area but trades 27°C/W higher junction-to-ambient thermal resistance; versus 74LVC1G125W5-7, it preserves signal polarity critical for timing-sensitive enable paths without adding gate delays.

Availability

74LVC1G126Z-7 is available at Aetrix Electronics and suitable for portable computing, display interface design, and USB peripheral development requiring stable component supply and long-term lifecycle support.

Supply support for 74LVC1G126Z-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 communications markets.

The 74LVC logic family targets low-voltage, mixed-supply digital interfacing-designed specifically to simplify voltage translation and bus isolation in space- and power-constrained portable electronics.

FAQ

What is the maximum input voltage the 74LVC1G126Z-7 can tolerate when VCC = 1.8V?

The device supports 5.5V-tolerant inputs across its full supply range. When VCC = 1.8V, inputs may safely swing from -0.5V to +5.5V per Absolute Maximum Ratings (VI). This enables direct connection to 3.3V or 5V buses without external clamping or level-shifting circuitry.

Does the 74LVC1G126Z-7 support hot-swap operation?

Yes-its IOFF circuitry actively disables both output FETs when VCC = 0V, blocking current flow from live inputs or outputs into the unpowered device. This meets JEDEC JESD78 latch-up immunity (>100mA) and enables safe insertion/removal in powered-backplane systems.

Can the 74LVC1G126Z-7 drive a 50 pF capacitive load at 10 MHz?

Yes-the typical output capacitance (Cpd) is 19 pF at 10 MHz with outputs enabled, and propagation delay remains ≤6.0 ns at 3.3V. With ±24mA drive capability, it can reliably switch 50 pF loads within timing budgets for control signals like display enable or reset distribution.

Is the SOT553 package RoHS-compliant and halogen-free?

Yes-the 74LVC1G126Z-7 is fully RoHS 3 compliant (2015/863/EU), lead-free, and halogen- and antimony-free ("Green" per Diodes Inc. definition: Br+Cl <1500 ppm, Sb <1000 ppm), verified per material declarations and manufacturing process audits.