Triple open-drain inverter for mixed-voltage and low-power buses
The Texas Instruments SN74AUP3G06DCUR is a triple inverter with open-drain outputs from the 74AUP ultra-low-power logic family. It operates across a 0.8V to 3.6V supply range, drawing a maximum quiescent current of 500 nA, making it a fit for battery-powered or always-on circuits where every microamp counts. The open-drain output lets you wire-OR multiple signals or level-shift to a higher pull-up voltage without an extra translator. Three independent inverter channels in a single 8-VFSOP (2.30mm width) package save board space compared to three single-gate devices.
Supply range and logic thresholds — what they mean for your BOM
The 0.8V to 3.6V supply covers everything from a single-cell coin cell (nominal 1.5V down to 0.9V end-of-life) to a regulated 3.3V rail. Input logic thresholds are specified as 0.7V to 0.9V for low and 1.6V to 2V for high at 3.3V supply, which means it reliably interprets 1.8V logic as a high without a separate level shifter. The open-drain output sinks 4 mA (low side) and floats high — the pull-up resistor sets the high-level voltage, so you can interface to a 2.5V or 3.3V bus from a lower-voltage core.
Propagation delay and output drive
Maximum propagation delay is 10.5 ns at 3.3V with a 30 pF load, which is adequate for slow control signals, reset lines, or interrupt aggregation where timing margins are generous. The 4 mA sink current handles typical CMOS or TTL loads; for higher-current indicators or relays, buffer the output with a transistor. The open-drain output also allows wired-OR connection of multiple open-drain gates to a single pull-up — useful for shared interrupt or fault lines.
Package and footprint
Supplied in an 8-VFSOP (2.30mm width) package, also designated as 8-VSSOP. The fine-pitch, small-body footprint suits dense PCB layouts. Surface-mount assembly; The Tape & Reel (TR) or Cut Tape (CT) options let you order production reels or small quantities for prototyping.
Lifecycle and sourcing
The SN74AUP3G06DCUR is listed as Active and ROHS3 compliant.