Texas Instruments SN74LVC3G17DCURE4

Overview

SN74LVC3G17DCURE4 from Texas Instruments is a triple Schmitt-trigger buffer IC operating from 1.65 V to 5.5 V, performing Y = A logic with hysteresis thresholds (VT+ = 1.5 V, VT– = 0.84 V at 3 V), 5.4 ns max propagation delay at 3.3 V, ±24 mA output drive, and Ioff-enabled partial-power-down protection. It serves signal conditioning and noise-immune level translation in portable audio interfaces and SSD power sequencing.

For engineers reviewing the SN74LVC3G17DCURE4 datasheet, SN74LVC3G17DCURE4 pinout, SN74LVC3G17DCURE4 application, or SN74LVC3G17DCURE4 equivalent, key selection criteria include Schmitt input hysteresis width (ΔVT = 0.56 V at 3 V), NanoFree™ VSSOP-8 package footprint (2.30 mm × 2.00 mm), Ioff current ≤5 μA at 0 V, and guaranteed operation from –40°C to 125°C.

Technical Context

This device implements three independent noninverting Schmitt buffers with asymmetric input thresholds-VT+ for rising edges and VT– for falling edges-enabling robust noise rejection on slow or noisy digital signals. Each buffer operates across the full 1.65–5.5 V supply range and accepts inputs up to 5.5 V regardless of VCC.

The Ioff circuitry actively disables outputs during power-down, blocking reverse current flow and supporting live insertion and back-drive protection. Its NanoFree™ VSSOP-8 package uses the silicon die as the package body, eliminating bond wires and reducing parasitic inductance for improved high-speed signal integrity.

Key Specifications

Pinout & Package

NanoFree™ VSSOP-8 package (2.30 mm × 2.00 mm body, 0.5 mm pitch) with exposed pad not electrically connected; optimized for space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G17DCKR and MC74LCX14DR2G, the SN74LVC3G17DCURE4 uniquely delivers three Schmitt buffers in a 2.30 × 2.00 mm VSSOP-8 with Ioff protection-reducing layout area by 62% versus six SC70 devices and enabling safe power sequencing in hot-swap systems.

Availability

SN74LVC3G17DCURE4 is available at Aetrix Electronics and suitable for portable audio docks, SSD power management, and industrial sensor interface applications requiring stable component supply, extended temperature operation (–40°C to 125°C), and compact NanoFree™ packaging.

Supply support for SN74LVC3G17DCURE4 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

Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with over 90 years of innovation in precision analog, power management, and logic solutions.

The SN74LVC3G17DCURE4 belongs to TI's LVC low-voltage CMOS logic family, designed specifically for noise-immune signal conditioning in space-constrained, mixed-voltage portable and industrial systems.

FAQ

What is the function of the SN74LVC3G17DCURE4?

The SN74LVC3G17DCURE4 is a triple noninverting Schmitt-trigger buffer that performs Y = A logic with hysteresis. Each of its three independent channels converts slow or noisy input signals into clean, rail-to-rail CMOS-compatible outputs. It operates from 1.65 V to 5.5 V and features Ioff protection for partial-power-down use cases. The SN74LVC3G17DCURE4 is commonly used for signal debouncing, level translation, and noise filtering in portable electronics.

Does the SN74LVC3G17DCURE4 support 5-V input signals while powered from a 1.8-V supply?

Yes, the SN74LVC3G17DCURE4 supports input voltages up to 5.5 V regardless of VCC level. When powered from 1.8 V, its inputs remain fully 5 V tolerant-enabling direct interfacing with legacy 5 V peripherals without external level shifters. This capability is explicitly specified in the "Inputs Accept Voltages to 5.5 V" feature and confirmed in Section 6.3 (Recommended Operating Conditions) of the datasheet.

What is the hysteresis voltage (ΔVT) of the SN74LVC3G17DCURE4 at 3.3 V supply?

At VCC = 3.3 V, the SN74LVC3G17DCURE4 has a typical hysteresis voltage (ΔVT = VT+ − VT–) of 0.56 V, with VT+ = 1.5 V and VT– = 0.84 V. This value is measured across the recommended operating temperature range and ensures reliable noise rejection for signals with amplitude fluctuations below 560 mV. The hysteresis remains stable across process, voltage, and temperature variations as verified in Table 6.5 (Electrical Characteristics).

Can unused inputs on the SN74LVC3G17DCURE4 be left floating?

No, unused inputs on the SN74LVC3G17DCURE4 must be tied to either VCC or GND. Floating CMOS inputs cause undefined logic states, increased power consumption, and potential oscillation due to noise coupling. The datasheet explicitly states in Section 6.3: "All unused inputs of the device must be held at VCC or GND to ensure proper device operation." For the SN74LVC3G17DCURE4, tying an unused input to VCC configures it as a logic HIGH, while GND sets it LOW-both prevent metastability.

What package type and dimensions does the SN74LVC3G17DCURE4 use?

The SN74LVC3G17DCURE4 uses the NanoFree™ VSSOP-8 package (orderable code DCU), measuring 2.30 mm × 2.00 mm with 0.5 mm lead pitch. This ultra-compact package eliminates traditional leadframe and molding compound, using the silicon die itself as the structural body. Its small footprint and low profile make it ideal for space-constrained applications like wireless headsets and SSD modules where board area is at a premium.