xr20m1280 Exar Corporation, xr20m1280 Datasheet - Page 6

• Manufacturer Part Number: xr20m1280
• Description: I2c/spi Uart With 128-byte Fifo And Integrated Level Shifters
• Manufacturer: Exar Corporation

XR20M1280
I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS
Pin Description
Pin type: I=Input, O=Output, I/O= Input/output, OD=Output Open Drain.
VCC_GPIO
N
GND
GND
AME
QFN-24
Center
P
Pad
IN
9
-
#
QFN-32
Center
PIN#
Pad
16
12
QFN-40
Center
13, 29
PIN#
Pad
20
T
Pwr
Pwr
Pwr
YPE
PRELIMINARY
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.
Power supply common, ground.
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.
6
D
ESCRIPTION
REV. P1.1.1