Active I²C interface for keypad/GPIO expansion
The LM8328TME/NOPB: Supply range is 1.62V to 1.98V, which ties it to a 1.8V nominal rail — common in battery-powered mobile designs. If that rail is clean and the processor's I²C bus runs at the same logic level, this part drops in without a level shifter.
25-DSBGA package — rework reality
Housed in a 25-bump DSBGA, this is a wafer-level chip-scale package with no leads — the solder balls are the only interface to the board. That means the hot-air profile matters: the package absorbs moisture quickly, so a bake at 125°C for 8 hours before reflow is standard if the seal was broken. The scorch mark on a dead board usually traces back to a shorted bypass cap on the 1.8V rail, not the IC itself — the I²C lines are low-speed and rarely fail unless ESD got in through an unshielded flex.
Sourcing and compliance
Active status means no last-time-buy clock is ticking — this part is still in TI's catalog for new builds.