xr20m1170 Exar Corporation, xr20m1170 Datasheet - Page 5

• Manufacturer Part Number: xr20m1170
• Description: I2c/spi Uart With 64-byte Fifo
• Manufacturer: Exar Corporation

Pin Description
REV. 1.0.0
Pin type: I=Input, O=Output, I/O= Input/output, OD=Output Open Drain.
N
SO
NC
A1
AME
SI
-
28-QFN
P
PAD
4, 8
27
28
IN
#
24-QFN
P
PAD
24
IN
1
-
#
16-QFN
P
PAD
16
IN
1
-
#
24-TSSOP
P
IN
3
4
-
-
#
16-TSSOP
P
5
IN
2
3
-
-
#
T
Pwr The center pad on the backside of the QFN
YPE
O
-
I
I
input pin. If I
this pin along with A0 pin allows user to change
the device’s base address. If SPI configuration
is selected, this pin is the SPI data input pin.
SPI data output pin. If SPI configuration is
selected then this pin is a three-stateable out-
put pin. If I2C-bus configuration is selected,
this pin is undefined and must be left uncon-
nected.
packages is metallic and is not electrically con-
nected to anything inside the device. It must be
soldered on to the PCB and may be optionally
connected to GND on the PCB. The thermal
pad size on the PCB should be the approxi-
mate size of this center pad and should be sol-
der mask defined. The solder mask opening
should be at least 0.0025" inwards from the
edge of the PCB thermal pad.
No Connection.
2
C-bus device address select A1 or SPI data
I2C/SPI UART WITH 64-BYTE FIFO
2
C-bus onfiguration is selected,
D
ESCRIPTION
XR20M1170