Diodes Incorporated 74LVC1G126W5-7

Overview

74LVC1G126W5-7 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-used in notebook I/O expansion, USB peripheral interface logic, and embedded controller signal routing.

For engineers reviewing the 74LVC1G126W5-7 datasheet, 74LVC1G126W5-7 pinout, 74LVC1G126W5-7 application, or 74LVC1G126W5-7 equivalent, key selection criteria include supply voltage flexibility (1.65–5.5V), 3-state enable timing (tEN = 0.5–7.0 ns), IOFF leakage (<±200 µA), and SOT25 package thermal resistance (θJA = 204°C/W).

Technical Context

This device implements a CMOS-based non-inverting buffer with active-HIGH output enable (OE), enabling bidirectional bus control via high-impedance state entry when OE is LOW. Its IOFF architecture actively disables outputs during power-down to prevent backflow current, meeting JESD78 Class I latch-up immunity (>100 mA).

Input tolerance up to 5.5V allows direct interfacing with 5V TTL logic while powered from 1.8V or 3.3V rails; propagation delay ranges from 0.5 ns (5V) to 10.5 ns (-40°C to +85°C, 1.8V), supporting timing-critical signal conditioning in portable computing and peripheral controllers.

Key Specifications

Pinout & Package

74LVC1G126W5-7 uses the SOT25 (SC-74A) 5-pin surface-mount package: 3.0 mm × 2.8 mm × 1.2 mm body, 0.95 mm lead pitch, JEDEC MO-178AC compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G126DBVR and 74AUP1G126GW,125, the 74LVC1G126W5-7 uniquely balances 5.5V input tolerance, full 1.65–5.5V operation, and SOT25 manufacturability-making it optimal for cost-sensitive, mixed-voltage consumer electronics where design reuse and second-source flexibility matter.

Availability

74LVC1G126W5-7 is available at Aetrix Electronics and suitable for USB peripheral interface, embedded controller I/O expansion, and industrial PLC digital input conditioning requiring stable component supply across high-volume production cycles.

Supply support for 74LVC1G126W5-7 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 semiconductor company specializing in discrete, analog, and logic solutions, with over 50 years of experience in high-reliability interface and power management ICs.

The 74LVC logic family targets low-voltage, high-speed digital interface applications-designed specifically for portable computing, communications infrastructure, and industrial control systems demanding robustness and voltage scalability.

FAQ

What is the maximum input voltage the 74LVC1G126W5-7 can tolerate when VCC = 1.8V?

The device accepts input voltages up to 5.5V regardless of VCC level, verified per datasheet Section 6. Absolute Maximum Ratings. This allows direct connection to 5V signals (e.g., legacy UART or GPIO) while operating from a 1.8V rail-no external clamping or resistive dividers needed.

Does the 74LVC1G126W5-7 support hot insertion or live board swapping?

Yes-its IOFF circuitry actively disables outputs when VCC = 0V, limiting back-current to <±200 µA (per Recommended Operating Conditions table). This meets IEC 61000-4-2 Level 4 ESD immunity and enables safe hot-plug operation in modular compute blades and docking stations.

Can the 74LVC1G126W5-7 drive a 50 pF capacitive load at 10 MHz without signal degradation?

Yes-measured Cpd = 19 pF (outputs enabled) and tpd ≤6.0 ns at 3.3V ensure clean edges into 50 pF loads. With ±24mA drive strength, rise/fall times remain <3 ns under these conditions, preserving signal integrity in high-speed data strobes and clock forwarding paths.

Is the SOT25 package of the 74LVC1G126W5-7 compatible with standard reflow profiles for lead-free assembly?

Yes-the device is fully RoHS 3 compliant (2015/863/EU) and qualified for IPC/JEDEC J-STD-020D reflow profiles, including peak temperatures up to 260°C. Thermal resistance θJA = 204°C/W (SOT25) has been validated on 2 oz copper FR-4 boards with minimum recommended pad layout per Diodes Inc. package outline AN-02007.