
XR20V2172
5
REV. 1.0.2
TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO AND RS232 TRANSCEIVER
NOTE: Pin type: I=Input, O=Output, I/O= Input/output, OD=Output Open Drain. For CMOS/TTL Voltage levels, ’LOW’
indicates a voltage in the range 0V to VIL and ’HIGH" indicates a voltage in the range VIH to VCC. For RS-232
input voltage levels, ’LOW’ is any voltage < -3V and ’HIGH’ is any voltage > 3V. For RS-232 output voltage levels,
’LOW’ is any voltage < -5V and ’HIGH’ is any voltage > 5V.
-
PAD
Pwr
The center pad on the backside of the QFN packages is metallic and is
not electrically connected to anything inside the device. It must be sol-
dered on to the PCB and may be optionally 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.
NC
3, 9, 10, 11, 18,
22, 23, 26, 30,
31, 32, 34, 36,
37, 46, 47, 48,
49, 55
-
No Connection.
Pin Description
NAME
64-QFN
PIN #
TYPE
DESCRIPTION