Dual-supply bus switch for voltage-domain crossing
The TC7WPN3125FK,LF(CT is a Toshiba TC7WP-series Bus Switch with two independent 1:1 single-pole single-throw (SPST) channels. Each channel passes signals in either direction; the switch is ON when the corresponding output-enable pin is asserted. The 3 mA output drive at both high and low states is modest — this part is a pass-gate for digital signals, not a line driver. It suits isolation of shared buses (I²C, SPI chip-select lines) where the load side needs to be disconnected when the bus is idle.
Package and temperature grade for board integration
Housed in an 8-VFSOP package (0.091" body width, 2.30 mm) with the 8-SSOP supplier device footprint, this is a fine-pitch surface-mount part. The 0.50 mm pin pitch demands careful solder-paste stencil design — a 4-mil stencil with a 1:1 aperture-to-land ratio is typical for this package class.