Diodes Incorporated 74LVC1G07FS3-7

Overview

74LVC1G07FS3-7 from Diodes Incorporated is a single CMOS buffer/driver IC with open-drain output, designed for level-shifting and wired-OR logic in mixed-voltage systems. It operates from 1.65V to 5.5V, tolerates 5.5V inputs, supports IOFF partial power-down, and delivers up to 32mA sink current at 4.5V - enabling direct TTL interface in notebook I/O expansion and USB peripheral control circuits.

For engineers reviewing the 74LVC1G07FS3-7 datasheet, 74LVC1G07FS3-7 pinout, 74LVC1G07FS3-7 application, or 74LVC1G07FS3-7 equivalent, key selection criteria include open-drain drive strength, 5.5V-tolerant input compatibility, IOFF leakage performance (±10μA), and thermal resistance (400°C/W) in the X2-DFN0808-4 package for space-constrained PCB layouts.

Technical Context

This device implements a non-inverting buffer with open-drain output, requiring an external pull-up resistor to define high-level logic states. Its IOFF circuit actively disables output leakage during power-down, preventing backflow current when VCC = 0V while inputs remain biased at 5.5V.

The logic function is strictly A → Y (buffered pass-through), with propagation delay ranging from 0.5ns (min) to 8.5ns (max) across 1.8V–5.0V supply and -40°C to +125°C ambient. Input thresholds scale with VCC (e.g., VIH = 0.7×VCC at 4.5–5.5V), ensuring robust noise margin in multi-rail environments.

Key Specifications

Pinout & Package

X2-DFN0808-4 is a 4-pin, 0.8mm × 0.8mm, 0.3mm-thick leadless package with NiPdAu terminal finish, optimized for ultra-compact routing and thermal performance (θJA = 400°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar open-drain buffer applications.

Compared with SN74LVC1G07DBVR and 74AUP1G07GW,125, the 74LVC1G07FS3-7 uniquely balances ultra-small footprint, 5.5V input tolerance, and 32mA sink capability - making it optimal for space- and voltage-flexible I/O expansion in portable electronics.

Availability

74LVC1G07FS3-7 is available at Aetrix Electronics and suitable for USB enumeration control, I²C level translation, and hot-swap detection requiring stable component supply across consumer, industrial, and automotive-tier production programs.

Supply support for 74LVC1G07FS3-7 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 manufacturer specializing in discrete, analog, and logic solutions, with emphasis on power efficiency, reliability, and miniaturization for high-volume electronics.

The 74LVC logic family targets low-voltage, mixed-rail digital interfacing - designed specifically for voltage translation, bus buffering, and power-aware I/O expansion in portable and embedded systems.

FAQ

Can 74LVC1G07FS3-7 drive a 5V pull-up resistor while operating from a 1.8V supply?

Yes. Its 5.5V-tolerant inputs and open-drain output allow connection to a 5V pull-up while VCC = 1.8V. The output will sink current to ground when active, pulling the line low regardless of pull-up voltage - enabling true level shifting without additional components.

What is the maximum recommended pull-up resistor value for reliable 3.3V logic-high with 74LVC1G07FS3-7?

At 3.3V supply and 24mA sink current, a 10kΩ pull-up yields ~0.24V VOL (well below 0.8V logic-low threshold), ensuring noise margin. For 400kHz I²C, 2.2kΩ is typical to meet rise-time specs; values above 50kΩ risk slow edges due to 4pF CPD and trace capacitance.

Does the NC pin on X2-DFN0808-4 require grounding or can it be left floating?

The NC pin is electrically unconnected and must remain unattached on the PCB. Grounding it risks mechanical stress on the die bond wire or unintended coupling; Diodes' package drawings explicitly designate it as "No Connection" with no internal tie.

How does IOFF behavior affect system power sequencing when VCC ramps after other rails?

When VCC = 0V, IOFF disables the output stage, limiting leakage to ±10μA even if A or Y is held at 5.5V. This prevents back-current into the unpowered IC, eliminating the need for sequencing delays or isolation FETs during power-up of multi-rail systems.