Diodes Incorporated 74LVC1G34FW4-7

Overview

74LVC1G34FW4-7 from Diodes Incorporated is a single non-inverting buffer gate with push-pull output, designed for level-shifting and signal conditioning in mixed-voltage digital systems. It operates from 1.65V to 5.5V, tolerates 5.5V inputs, supports IOFF partial power-down, and delivers ±24mA drive at 3.3V - used in notebook I/O expansion and peripheral interface isolation.

For engineers reviewing the 74LVC1G34FW4-7 datasheet, 74LVC1G34FW4-7 pinout, 74LVC1G34FW4-7 application, or 74LVC1G34FW4-7 equivalent, key selection criteria include supply voltage flexibility (1.65–5.5V), 5.5V-tolerant inputs, IOFF-enabled power-down isolation, and DFN1010-6 package thermal performance (θJA = 445°C/W).

Technical Context

This CMOS buffer implements the Boolean identity function (A = Y) with rail-to-rail push-pull output stage, enabling bidirectional voltage translation between 1.65V and 5.5V domains without external biasing. Its IOFF circuit actively disables output leakage during VCC power-down, preventing backflow currents in partial-power-down systems.

Input thresholds are VIL ≤ 0.35×VCC and VIH ≥ 0.65×VCC across supply ranges, ensuring reliable TTL-level compatibility. Propagation delay is 0.5–5.5ns (typical) at 3.3V, with input capacitance of 5pF and power dissipation capacitance of 16pF at 10MHz - optimized for low-noise, high-speed logic interfacing.

Key Specifications

Pinout & Package

X2-DFN1010-6 (1.0mm × 1.0mm, 0.35mm height) with wettable flank terminals and NiPdAu plating - optimized for automated optical inspection (AOI) and high-yield reflow in space-constrained PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar single-buffer gate applications.

Compared with SN74LVC1G34DBVR and 74LVC1G34FW5-7, the 74LVC1G34FW4-7 offers optimal density and thermal resistance balance for high-volume portable electronics, while its standardized pinout simplifies layout reuse across Diodes' LVC portfolio.

Availability

74LVC1G34FW4-7 is available at Aetrix Electronics and suitable for USB peripheral interface, industrial sensor hub, automotive infotainment display, and network switch management bus applications requiring stable component supply, consistent DFN1010-6 packaging, and guaranteed IOFF functionality.

Supply support for 74LVC1G34FW4-7 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 mixed-signal solutions, with design centers in Asia, Europe, and the US, and manufacturing in certified ISO/TS 16949 and ISO 14001 facilities.

The 74LVC logic family targets low-voltage, high-speed digital interfacing in portable, industrial, and automotive-adjacent systems - emphasizing voltage flexibility, power-down safety, and small-footprint reliability.

FAQ

Can 74LVC1G34FW4-7 operate reliably at 1.65V supply?

Yes. The device is fully characterized down to 1.65V with guaranteed VOH ≥ VCC – 0.1V and VOL ≤ 0.45V at 4mA load. At this minimum voltage, propagation delay increases to 7.5ns (max), and output drive drops to ±4mA - sufficient for low-speed control signaling in battery-powered devices.

What is the maximum capacitive load this buffer can drive at 100MHz?

Based on CPD = 16pF and typical tPD = 2.0ns at 3.3V, the 74LVC1G34FW4-7 maintains signal integrity up to ~30pF load at 100MHz. For heavier loads, derate output current or add series termination to avoid overshoot and maintain <10% timing jitter.

Does the IOFF feature require external pull-up/down resistors?

No. IOFF is fully internal and activates automatically when VCC = 0V. Inputs and outputs enter high-impedance state without external components. However, unused inputs must still be tied to VCC or GND per recommended operating conditions to prevent floating node oscillation.

Is the X2-DFN1010-6 package RoHS-compliant and halogen-free?

Yes. The 74LVC1G34FW4-7 uses NiPdAu terminal finish and meets EU RoHS 2015/863/EU (RoHS 3), with bromine <900ppm, chlorine <900ppm (Br+Cl <1500ppm), and antimony <1000ppm - certified as Diodes' "Green" product per Note 3 in the datasheet.