Texas Instruments SN74LVC2G17DCK3

Overview

SN74LVC2G17DCK3 from Texas Instruments is a dual Schmitt-trigger buffer IC designed for 1.65 V to 5.5 V operation, featuring hysteresis on both inputs (VT+ = 2.0 V, VT– = 1.3 V at 3 V), ±24-mA output drive at 3.3 V, and I_off support for live insertion and partial-power-down applications. It performs Y = A logic for two independent channels and is used in noise-prone signal conditioning paths such as power button debouncing and audio dock interface buffering.

For engineers reviewing the SN74LVC2G17DCK3 datasheet, SN74LVC2G17DCK3 pinout, SN74LVC2G17DCK3 application, or SN74LVC2G17DCK3 equivalent, key selection criteria include Schmitt-trigger input thresholds, 5.4 ns max t_pd at 3.3 V, NanoFree™ SC70-6 package compatibility, and 5.5-V-tolerant inputs enabling level translation from 5 V to 3.3 V or 1.8 V systems.

Technical Context

This device implements two independent noninverting Schmitt-trigger buffers with asymmetric input thresholds (ΔV_T = 0.7 V typical at 3 V), enabling robust noise immunity in slow-rising or noisy digital signals. Its I_off circuitry actively disables outputs when V_CC = 0 V, preventing back-drive current and supporting hot-plug capability.

The SN74LVC2G17DCK3 operates across –40°C to 125°C with full specification compliance, supports down-translation (e.g., 5 V input → 3.3 V output), and maintains low ICC (10 μA max) and low dynamic power (C_pd = 19 pF at 3.3 V), making it suitable for battery-powered portable audio and SSD control interfaces.

Key Specifications

Pinout & Package

SN74LVC2G17DCK3 uses the SC70-6 (DCK) package: 2.00 mm × 1.25 mm body, 0.65 mm pitch, 6-pin surface-mount outline with exposed pad not present. Pin 1 is marked by a dot or beveled corner per JEDEC MO-203-DA.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC2G17DBVR, SN74LVC2G17DCK3 saves >50% PCB area but trades off thermal resistance; compared with SN74LVC1G17DCKR, it delivers two independent buffers in one die, reducing component count and interconnect complexity in compact portable designs.

Availability

SN74LVC2G17DCK3 is available at Aetrix Electronics and suitable for power button debouncing, audio dock interface conditioning, and SSD reset control requiring stable component supply across industrial temperature ranges (–40°C to 125°C).

Supply support for SN74LVC2G17DCK3 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 leadership in low-power logic, precision analog, and high-reliability interface solutions.

The SN74LVC2G17 series belongs to TI's LVC (Low-Voltage CMOS) logic family, designed specifically for noise-immune signal conditioning in portable, audio, and storage applications where small size, wide V_CC range, and I_off capability are essential.

FAQ

What is the maximum propagation delay of SN74LVC2G17DCK3 at 3.3 V?

The maximum propagation delay (t_pd) of SN74LVC2G17DCK3 is 5.4 ns at V_CC = 3.3 V, measured under –40°C to 85°C conditions with 30 pF load. This value is confirmed in Section 7.6 of the SCES381N datasheet and applies to both rising and falling transitions. SN74LVC2G17DCK3 maintains this performance across its full operating temperature range up to 125°C, with t_pd increasing to 5.9 ns at the upper limit.

Does SN74LVC2G17DCK3 support 5-V input signals while powered at 3.3 V?

Yes, SN74LVC2G17DCK3 supports input voltages up to 5.5 V regardless of V_CC level, including when V_CC = 3.3 V. This 5-V tolerance is explicitly specified in Section 7.3 (Recommended Operating Conditions) and Section 9.3 (Feature Description) of the datasheet. The input structure is designed to safely clamp and translate 5 V signals without external components, enabling direct interfacing with legacy 5 V peripherals in modern 3.3 V systems.

What is the purpose of the I_off feature in SN74LVC2G17DCK3?

The I_off feature in SN74LVC2G17DCK3 disables output drivers when V_CC = 0 V, preventing damaging back-current flow from live inputs or outputs into the unpowered device. As documented in Section 9.1 and Section 9.3, this supports safe live insertion, partial-power-down modes, and back-drive protection in multi-rail systems. Measured I_off is ≤±10 μA, ensuring minimal leakage during power-off states in SN74LVC2G17DCK3 applications.

How does the Schmitt-trigger action improve noise immunity in SN74LVC2G17DCK3?

SN74LVC2G17DCK3 uses asymmetric input thresholds (VT+ = 2.0 V, VT– = 1.3 V at 3 V) to create 0.7 V hysteresis, meaning a noise spike must exceed ±350 mV to cause unintended state changes. This eliminates chatter on slow-rising signals like mechanical switches or long traces, as verified in Section 7.5 (Electrical Characteristics) and Section 10.2 (Typical Power Button Circuit). The hysteresis is inherent to the silicon design and requires no external components.

What package type is used by SN74LVC2G17DCK3 and what are its dimensions?

SN74LVC2G17DCK3 uses the SC70-6 (DCK) package, measuring 2.00 mm × 1.25 mm with 0.65 mm lead pitch. This is confirmed in the Device Information table (Section 2) and Package Option Addendum of the SCES381N datasheet. The "DCK" suffix in the part number directly denotes this SC70 variant, distinguishing it from SOT-23 (DBV), SON (DRY/DSF), or DSBGA (YZP) versions of the same base device.