Diodes Incorporated 74LVC1G17W5-7

Overview

74LVC1G17W5-7 from Diodes Incorporated is a single-channel Schmitt-trigger buffer IC in SOT25 package, designed for noise-immune signal conditioning and level translation between 1.65V and 5.5V logic domains. It features ±24mA output drive at 3.3V, 5.5V-tolerant inputs, IOFF partial power-down protection, and hysteresis of 0.35–1.20V across supply range - deployed in USB interface signal cleanup and microcontroller I/O expansion circuits.

For engineers reviewing the 74LVC1G17W5-7 datasheet, 74LVC1G17W5-7 pinout, 74LVC1G17W5-7 application, or 74LVC1G17W5-7 equivalent, key selection criteria include input hysteresis width (ΔVT), IOFF leakage (<±10 μA), propagation delay (0.7–4.4 ns at 3.3V/15pF), 5.5V input tolerance, and SOT25 thermal resistance (θJA = 204°C/W).

Technical Context

This device implements a non-inverting Schmitt-trigger transfer function with separate positive-going (VT+) and negative-going (VT−) input thresholds, enabling robust noise rejection on slow or noisy digital signals. Thresholds scale with VCC: VT+ ranges from 0.70V (1.65V supply) to 3.33V (5.5V supply); VT− from 0.30V to 2.35V.

The IOFF circuit actively disables output during power-down, blocking current backflow when VCC = 0V while inputs remain at up to 5.5V - critical for hot-swap and mixed-voltage system interoperability. Output drive strength is specified at ±4mA to ±32mA depending on VCC, supporting direct connection to standard CMOS loads without external buffering.

Key Specifications

Pinout & Package

SOT25 (SC-74A) 5-pin plastic package with exposed pad not present; moisture sensitivity level 1; tin-plated leads; 0.016g mass; footprint per Diodes outline drawing SOT25.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G17DBVR, the 74LVC1G17W5-7 offers tighter IOFF leakage (±10 μA vs ±20 μA) and broader supply support (up to 5.5V), making it preferable for mixed-voltage industrial interfaces; versus 74AUP1G17GW, it delivers 6× higher drive strength and full 5V tolerance - essential for legacy peripheral integration.

Availability

74LVC1G17W5-7 is available at Aetrix Electronics and suitable for USB interface conditioning, microcontroller I/O expansion, industrial sensor interfacing, and power sequencing control requiring stable component supply across automotive, industrial, and consumer electronics programs.

Supply support for 74LVC1G17W5-7 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 semiconductor manufacturer specializing in discrete, analog, and logic solutions for industrial, computing, communications, and consumer markets.

The 74LVC logic family targets low-voltage, high-noise-immunity digital interfacing - engineered for robust operation in mixed-supply systems with emphasis on power efficiency, wide voltage compatibility, and system-level reliability.

FAQ

Can the 74LVC1G17W5-7 be used with a 1.8V supply and 5V input signals?

Yes. The device supports VCC as low as 1.65V and accepts input voltages up to 5.5V on pin A regardless of supply level. This enables direct interfacing of 5V sensors or legacy peripherals to 1.8V microcontrollers without external level-shifting components.

What is the purpose of the NC pin (Pin 5) in the SOT25 package?

Pin 5 is a no-connect terminal with no internal bond wire or circuit connection. It must be left unconnected or optionally tied to GND/VCC for mechanical stability - it has no electrical function and does not affect device operation or thermal performance.

How does the IOFF feature protect the device during partial power-down?

When VCC drops to 0V, the IOFF circuit disables the output stage, placing Y in high-impedance state and limiting leakage current to ±10 μA. This prevents reverse current flow from live 5.5V inputs into a powered-down subsystem, avoiding latch-up or damage to downstream ICs.

Is the 74LVC1G17W5-7 suitable for automotive applications?

The standard 74LVC1G17W5-7 is not AEC-Q100 qualified. Diodes offers an automotive-compliant variant, 74LVC1G17Q, which undergoes extended temperature testing (–40°C to +125°C), PPAP documentation, and manufacturing in IATF 16949-certified facilities - required for under-hood or safety-critical vehicle systems.