SNLS708 February 2023 DS90UB638-Q1
PRODUCTION DATA
Each VDD power supply pin must have a 10-nF (or 100-nF) capacitor to ground connected as close as possible to DS90UB638-Q1 device. When operating VDDIO at 1.8-V nominal supply, the voltage at VDDIO must be within ±100 mV of VDD18 to ensure VIH, VIL specifications. TI recommends having additional decoupling capacitors (1 µF or 10 µF) connected to a common GND plane. Note that although average current for VDDIO is less than 10 mA maximum, the peak current into VDDIO may exceed 100 mA on device start-up.