XR20M1280 Datasheet, PDF (6/63 Pages) Exar Corporation – I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS

XR20M1280
I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS
Pin Description
REV. 1.0.0
NAME
QFN-24 QFN-32 QFN-40
TYPE
PIN#
PIN#
PIN#
DESCRIPTION
VCC_GPIO
-
16
20
Pwr _{1.62V to 3.63V VCC for the GPIO signals.}
This supply voltage pin will determine the I/O levels of the
GPIO[15:4] signals.
GND
9
12
13, 29 Pwr _{Power supply common, ground.}
GND
Center
Pad
Center
Pad
Center
Pad
Pwr _{The center pad on the backside of the QFN package is metallic and}
should be connected to GND on the PCB. The thermal pad size on
the PCB should be the approximate size of this center pad and
should be solder mask defined. The solder mask opening should be
at least 0.0025" inwards from the edge of the PCB thermal pad.
Pin type: I=Input, O=Output, I/O= Input/output, OD=Output Open Drain.
6