Single open-drain buffer for mixed-voltage buses
The open-drain output sinks up to 32mA but cannot source current — the high level is set by whatever voltage you tie the external pull-up to, up to 5.5V regardless of VCC. The SC-70-5 package (also known as SOT-353) is a 5-lead surface-mount package roughly 2mm x 2.1mm.
That means it is happy in an engine bay, on a satellite panel, or in an outdoor base station where the enclosure bakes in the sun. The wide supply tolerance — 1.65V to 5.5V — means you can run it from a 1.8V core rail or a 5V industrial bus without a separate regulator. Just remember: the open-drain output's high level is set by the pull-up voltage, not VCC, so you can interface a 1.8V microcontroller to a 3.3V or 5V peripheral without a level shifter IC.
Active production — no end-of-life worry
No last-time-buy deadlines to track, no risk of a sudden EOL notice on a BOM that needs to run for another five years. For new designs, it is a safe choice from a lifecycle standpoint.