Diodes Incorporated 74LVC3G17SS8-7

Overview

74LVC3G17SS8-7 from Diodes Incorporated is a triple Schmitt-trigger buffer IC in SSOP-8 package, operating from 1.65V to 5.5V with ±24mA output drive at 3.3V, 5.4ns max propagation delay at 3.3V, and 5.5V-tolerant inputs. It enables voltage-level shifting and signal conditioning in mixed-voltage digital interfaces such as USB peripheral control paths and I²C bus signal cleanup.

For engineers reviewing the 74LVC3G17SS8-7 datasheet, 74LVC3G17SS8-7 pinout, 74LVC3G17SS8-7 application, or 74LVC3G17SS8-7 equivalent, key selection criteria include hysteresis width (0.56–0.87V at 3V), IOFF-enabled partial power-down isolation, and VSSOP/SSOP package compatibility for space-constrained logic interfacing.

Technical Context

This device implements three independent non-inverting Schmitt-trigger buffers with rail-to-rail input tolerance up to 5.5V and push-pull outputs. Each channel provides hysteresis (ΔVT = 0.56–0.87V at VCC = 3V) to reject noise on slow or noisy signals like reset lines or mechanical switch inputs.

The IOFF circuit disables outputs during power-down, preventing back-current flow when VCC = 0V while inputs remain at 5.5V - critical for hot-swap and multi-rail system partitioning. Input capacitance is 4pF (typ), and supply current remains ≤10μA across full temperature range.

Key Specifications

Pinout & Package

74LVC3G17SS8-7 is housed in an 8-pin SSOP (Shrink Small Outline Package) with 0.65mm lead pitch, 2.95mm × 4.00mm body size, and exposed thermal pad not present - suitable for reflow assembly and moderate-power logic interfacing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC3G17DCTR and 74LVC1G17GW,125, the 74LVC3G17SS8-7 delivers true triple-channel integration in one SSOP-8 footprint - reducing component count, interconnect inductance, and layout effort for synchronized signal conditioning tasks.

Availability

74LVC3G17SS8-7 is available at Aetrix Electronics and suitable for USB peripheral interface design, I²C bus stabilization, power sequencing isolation, and industrial HMI button conditioning requiring stable component supply and consistent parametric performance.

Supply support for 74LVC3G17SS8-7 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 analog ICs, specializing in high-reliability, low-power, and mixed-signal solutions for industrial, computing, and consumer markets.

The 74LVC logic family targets high-speed, low-voltage CMOS applications requiring robust noise immunity, wide supply flexibility, and seamless interoperability across voltage domains.

FAQ

Can 74LVC3G17SS8-7 operate with VCC = 1.8V while accepting 5V inputs?

Yes. The device supports 1.65V–5.5V VCC and has 5.5V-tolerant inputs - enabling safe 5V signal reception on any input pin even when powered from 1.8V. This eliminates external level-shifting components in mixed-voltage systems.

What is the purpose of the IOFF feature in this buffer?

IOFF disables output drivers when VCC = 0V, blocking current flow from live inputs into the unpowered device. This prevents damaging back-current in partial power-down scenarios - critical for hot-swap interfaces and multi-rail domain isolation in industrial controllers.

How does the Schmitt-trigger input improve noise immunity compared to standard CMOS inputs?

It provides hysteresis (0.56–0.87V at 3V), meaning the input threshold rises on positive transitions (VT+ ≈ 1.5–1.87V) and falls on negative transitions (VT− ≈ 0.84–1.14V). This 0.5V+ window rejects noise spikes that would otherwise cause multiple toggles on slow or noisy signals like mechanical switches.

Is the SSOP-8 package of 74LVC3G17SS8-7 compatible with automated optical inspection (AOI) after reflow?

Yes. The SSOP-8 package features gull-wing leads with 0.65mm pitch and defined coplanarity (≤0.10mm), meeting IPC-A-610 Class 2/3 requirements. Its 2.95mm × 4.00mm body and visible solder joints enable reliable AOI detection of bridging, lift-off, and insufficient fillet.