Diodes Incorporated 74LVC3G17V8-7

Overview

74LVC3G17V8-7 from Diodes Incorporated is a triple Schmitt-trigger buffer in VSSOP-8 package, operating from 1.65V to 5.5V with 5.5V-tolerant inputs and ±24mA output drive at 3.3V. It supports partial power-down via IOFF, provides hysteresis (0.37–1.11V), and enables voltage-level shifting in mixed-voltage digital systems such as notebook I/O expansion and peripheral signal conditioning.

For engineers reviewing the 74LVC3G17V8-7 datasheet, 74LVC3G17V8-7 pinout, 74LVC3G17V8-7 application, or 74LVC3G17V8-7 equivalent, key selection criteria include input hysteresis width, IOFF leakage (<±10μA), propagation delay (1.0–10.2ns), rail-to-rail output swing, and VSSOP-8 thermal resistance (155°C/W).

Technical Context

This device implements three independent non-inverting Schmitt-trigger buffers with separate input/output pairs (1A→1Y, 2A→2Y, 3A→3Y) and shared VCC/GND. Each buffer exhibits defined VT+ (0.79–3.33V) and VT− (0.39–2.29V) thresholds across supply voltages, delivering noise-immune signal conditioning for slow or noisy digital inputs.

The IOFF circuit actively disables outputs during power-down, limiting backflow current to <±10μA when VCC = 0V and VI/VO = 5.5V. Input capacitance is 4pF (typ), and propagation delay is specified from 1.0ns (5V, 25°C) to 10.2ns (1.8V, −40°C to +125°C).

Key Specifications

Pinout & Package

VSSOP-8 (Very Small Outline Package, 2.0mm × 3.4mm body, 0.5mm pitch) with exposed pad not electrically connected. Compact footprint suits space-constrained portable and embedded designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schmitt-trigger buffer applications.

Compared with SN74LVC3G17DCTR and 74LVC1G17GV,125, the 74LVC3G17V8-7 delivers triple buffering in the smallest footprint (2.0×3.4mm), optimal for space-critical consumer electronics, while maintaining identical noise immunity, voltage tolerance, and IOFF behavior.

Availability

74LVC3G17V8-7 is available at Aetrix Electronics and suitable for USB peripheral signal conditioning, industrial sensor interface, notebook keyboard controller I/O, and automotive infotainment reset sequencing requiring stable component supply and guaranteed long-term sourcing.

Supply support for 74LVC3G17V8-7 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 integrated circuits, specializing in high-performance, energy-efficient components for computing, industrial, and consumer markets.

The 74LVC series targets low-voltage, mixed-supply digital logic applications, emphasizing wide VCC range, 5V-tolerant inputs, and robust power-down behavior for modern portable and embedded systems.

FAQ

What is the maximum input frequency this device can handle reliably?

The 74LVC3G17V8-7 does not specify a maximum clock frequency, as it is a combinational buffer-not a clocked device. Its usable signal bandwidth is determined by propagation delay (1.0–10.2ns) and rise/fall times (<2.5ns). For clean edge transmission, input transitions should be slower than ~100MHz to avoid excessive jitter from hysteresis interaction, though it reliably conditions kHz–low-MHz control signals like resets and interrupts.

Can this part be used to translate 5V logic down to 1.8V logic levels?

Yes-the 74LVC3G17V8-7 accepts 5.5V-tolerant inputs while operating from a 1.8V supply, producing 0V/1.8V CMOS-compatible outputs. This enables true unidirectional 5V-to-1.8V level translation without external biasing. However, it cannot translate 1.8V up to 5V, as outputs are rail-referenced to VCC only.

Does the IOFF feature require external control or is it automatic?

IOFF activation is fully automatic and requires no external enable signal. When VCC drops to 0V (or near 0V), the internal IOFF circuit detects loss of supply and places all three outputs in high-impedance state within nanoseconds, blocking reverse current flow regardless of input or output voltage states.

How does the Schmitt-trigger hysteresis improve performance over a standard buffer?

The hysteresis (0.37–1.11V) creates two distinct input thresholds-VT+ for rising edges and VT− for falling edges-preventing multiple output transitions caused by slow or noisy input edges. This eliminates contact bounce artifacts in switches, reduces false triggering from EMI on long traces, and stabilizes marginal logic signals without requiring external RC networks or firmware polling.