Texas Instruments SN74AUP1T17DCKR

Overview

SN74AUP1T17DCKR from Texas Instruments is a single-channel Schmitt-trigger buffer IC designed for logic-level translation in low-power, mixed-voltage systems. It supports 1.8 V/2.5 V/3.3 V input levels with CMOS-compatible 3.3 V output, delivers ±4 mA drive strength, features 210 mV input hysteresis (ΔVT), and operates across 2.3 V–3.6 V supply range - enabling robust signal conditioning in portable audio and SSD power-control interfaces.

For engineers reviewing the SN74AUP1T17DCKR datasheet, SN74AUP1T17DCKR pinout, SN74AUP1T17DCKR application, or SN74AUP1T17DCKR equivalent, key selection criteria include its Ioff support for partial power-down (VCC = 0 V), 5-pin SC-70 package footprint, sub-1 µA static current, 5.5-V-tolerant inputs, and verified level-shifting capability across 1.8 V → 3.3 V, 2.5 V → 3.3 V, and 1.8 V → 2.5 V configurations.

Technical Context

The SN74AUP1T17DCKR implements a noninverting Schmitt-trigger buffer (Y = A) with asymmetric input thresholds (VT+ = 0.75–1.19 V, VT− = 0.5–0.85 V at VCC = 3.0–3.6 V), delivering 210 mV hysteresis to reject noise on slow or noisy signals. Its Ioff circuitry disables outputs when VCC = 0 V, allowing safe back-driving of inputs/outputs up to 3.6 V without damage.

This device uses TI's AUP (Advanced Ultra-Low-Power) CMOS process, optimized for battery-powered applications. It achieves <0.9 µA typical ICC at 25°C and <0.5 µA at –40°C to +85°C, while maintaining 4 mA output drive and <9.8 ns propagation delay (tpd) under 30 pF load at VCC = 3.3 V and VI = 1.8 V.

Key Specifications

Pinout & Package

SN74AUP1T17DCKR is housed in a 5-pin SC-70 (DCK) package measuring 2.00 mm × 1.25 mm × 1.1 mm (max height), optimized for space-constrained portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G17DCKR and 74AHC1G17SE-7, SN74AUP1T17DCKR uniquely combines sub-1 µA static current, 210 mV hysteresis, and Ioff-enabled partial power-down - making it the only option qualified for battery-sensitive, hot-pluggable, and noise-prone mixed-signal interfaces.

Availability

SN74AUP1T17DCKR is available at Aetrix Electronics and suitable for audio docks, solid-state drives, wireless headsets, and Blu-ray player control interfaces requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for SN74AUP1T17DCKR 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 leader specializing in analog, embedded processing, and logic solutions, with over 90 years of innovation in power efficiency and signal integrity.

SN74AUP1T17DCKR belongs to TI's AUP (Advanced Ultra-Low-Power) logic family, engineered specifically for battery-powered consumer electronics where nanowatt static power, robust noise immunity, and seamless voltage translation are mandatory design requirements.

FAQ

What is the maximum input voltage rating for SN74AUP1T17DCKR?

The SN74AUP1T17DCKR supports input voltages from 0 V to 3.6 V regardless of VCC setting, and its inputs are explicitly rated for 5.5-V tolerance per TI documentation. This allows safe interfacing with higher-voltage logic families without external protection components, and the device remains undamaged even when VCC = 0 V and inputs are driven to 3.6 V.

Does SN74AUP1T17DCKR support level translation from 3.3 V down to 2.5 V?

Yes, SN74AUP1T17DCKR supports bidirectional level translation including 3.3 V input to 2.5 V output when operated with VCC = 2.5 V. The datasheet confirms this configuration under "Output Level Up to Supply VCC CMOS Level" and lists 3.3 V → 2.5 V translation explicitly in the Features section, with validated switching characteristics in Section 6.8.

What is the purpose of the NC pin (Pin 1) on SN74AUP1T17DCKR?

Pin 1 of SN74AUP1T17DCKR is a no-connect (NC) terminal with no internal connection. It must be left floating or tied to GND per TI layout guidance - it serves no electrical function and does not affect device operation. Board layout should avoid routing signals near this pin to prevent parasitic coupling.

How does the Ioff feature of SN74AUP1T17DCKR improve system reliability?

The Ioff feature in SN74AUP1T17DCKR disables output drivers when VCC = 0 V, preventing damaging reverse current flow from live inputs or outputs into a powered-down domain. This protects downstream circuitry in SSDs, tablets, and PDAs during hot-plug events or partial power cycling, and is validated to withstand 0–3.6 V applied signals without latch-up or degradation.

Can SN74AUP1T17DCKR be used as a clock buffer?

Yes, SN74AUP1T17DCKR is commonly deployed as a low-jitter clock cleaner in cost-sensitive oscillators, as confirmed in Section 9.2 ("Typical Application") of the datasheet. Its Schmitt-trigger input suppresses noise on marginal clock sources, and its matched rise/fall times (<9.8 ns max) preserve duty cycle integrity for frequencies up to ~50 MHz under light capacitive loads.