Diodes Incorporated 74LVC1G125QW5-7

Overview

74LVC1G125QW5-7 from Diodes Incorporated is an automotive-grade single non-inverting buffer with 3-state output, designed for voltage-level shifting and signal isolation in mixed-voltage systems. It operates from 1.65V to 5.5V, tolerates 5.5V inputs regardless of V_CC, delivers ±24mA drive at 3.3V, and supports partial power-down via IOFF. Used in AEC-Q100-compliant automotive control modules requiring Grade 1 (–40°C to +125°C) operation.

For engineers reviewing the 74LVC1G125QW5-7 datasheet, 74LVC1G125QW5-7 pinout, 74LVC1G125QW5-7 application, or 74LVC1G125QW5-7 equivalent, key selection criteria include 3-state enable timing (t_EN/t_DIS ≤ 7.0 ns at 3.3V), IOFF leakage (±2 μA), input overvoltage tolerance, and SOT25 package thermal resistance (θ_JA = 184°C/W).

Technical Context

This device implements a single-channel CMOS buffer with active-low 3-state enable (OE), enabling bidirectional bus isolation in automotive domain controllers. Its IOFF circuit blocks current backflow during power-down, satisfying IATF 16949 functional safety requirements for partial-power-down sequencing.

The logic function is strictly non-inverting (Y = A when OE = LOW); no internal pull-ups or latching. Input thresholds scale with V_CC (VIH = 0.65×V_CC min at 1.65V), ensuring robust noise immunity across 1.65–5.5V supply range while maintaining compatibility with 1.8V, 2.5V, 3.3V, and 5V logic families.

Key Specifications

Pinout & Package

SOT25 (3.0mm × 2.8mm × 1.2mm, 0.95mm lead pitch) - compact surface-mount package with exposed pad thermal path, moisture sensitivity level 1, matte tin-plated leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G125DBVR and 74LVC1G125GW,125, the 74LVC1G125QW5-7 uniquely combines AEC-Q100 Grade 1 qualification, SOT25's lower thermal resistance (184°C/W), and full 5.5V input tolerance - making it the only choice for thermally demanding automotive control nodes requiring guaranteed operation at +125°C ambient.

Availability

74LVC1G125QW5-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O expansion, infotainment head units, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVC1G125QW5-7 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 ICs, specializing in high-reliability solutions for automotive, industrial, and computing markets with ISO/TS 16949 and IATF 16949 certification.

The 74LVC logic family targets low-voltage, mixed-supply system interfacing - designed specifically for voltage translation, bus isolation, and power-aware signal routing in AEC-Q100-compliant automotive electronics.

FAQ

Can 74LVC1G125QW5-7 be used with a 1.5V supply?

No. The absolute minimum recommended operating voltage is 1.65V per DS39797 Rev. 2–2. At 1.5V, VIH thresholds fall below valid logic-high detection (e.g., VIH min = 0.65×1.65V = 1.07V), risking unreliable switching and increased static current. Data retention is supported down to 1.5V, but functional operation requires ≥1.65V.

What is the maximum capacitive load this buffer can drive reliably?

The datasheet specifies t_PD and t_EN/t_DIS with 30–50pF load and 500–1000Ω termination. Driving >100pF increases propagation delay nonlinearly and may cause overshoot/undershoot exceeding ±0.5V. For loads >75pF, add series termination (22–33Ω) near the driver output to maintain signal integrity.

Is the SOT25 package RoHS and halogen-free?

Yes. Per DS39797 Notes 1–3, the 74LVC1G125QW5-7 is fully RoHS 3 compliant (2015/863/EU), lead-free, and halogen/antimony-free ("Green"), with bromine & chlorine <900ppm each and antimony <1000ppm - verified per Diodes Incorporated's quality definitions.

How does IOFF behave when V_CC = 0V and OE = HIGH?

When V_CC = 0V and OE = HIGH, the IOFF circuit actively disables both input and output structures. Input pins present ≤±2 μA leakage (per DS39797 Table 3), and output Y remains in high-impedance with ≤±2 μA leakage - preventing current flow from external 5.5V sources into the unpowered device, satisfying partial power-down safety requirements.