XR20M1172IL32-F Exar Corporation, XR20M1172IL32-F Datasheet - Page 4

• Manufacturer Part Number: XR20M1172IL32-F
• Description: IC UART FIFO I2C/SPI 64B 32QFN
• Manufacturer: Exar Corporation

Specifications of XR20M1172IL32-F

• Number Of Channels: 2, DUART
• Package / Case: 32-VFQFN Exposed Pad
• Features: *
• Fifo's: 64 Byte
• Protocol: RS485
• Voltage - Supply: 1.62 V ~ 3.63 V
• With Auto Flow Control: Yes
• With Irda Encoder/decoder: Yes
• With False Start Bit Detection: Yes
• With Modem Control: Yes
• With Cmos: Yes
• Mounting Type: Surface Mount
• Data Rate: 16 Mbps
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 1.62 V
• Supply Current: 250 uA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• No. Of Channels: 2
• Uart Features: Tx/Rx FIFO Counters
• Supply Voltage Range: 1.62V To 3.63V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: QFN
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

XR20M1172
TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO
Pin Description
GPIO4/DSRA#
GPIO5/DTRA#
GPIO1/DTRB#
GPIO6/CDA#
RESET#
EN485#
CTSB#
CTSA#
RTSA#
ENIR#
N
IRQ#
SCL
AME
32-QFN
P
16
17
18
19
20
21
22
23
24
25
26
27
IN
#
28-TSSOP
P
18
19
20
21
22
23
24
25
26
27
IN
-
-
#
T
I/O
I/O
I/O
I/O
YPE
O
O
I
I
I
I
I
I
UART Clear-To-Send. This input can be used for Auto CTS Hardware
Flow Control or as a general purpose input. If unused, this pin should
be connected to VCC or GND.
I
selected, the serial clock idles HIGH. When the SPI interface is
selected, the serial clock idles LOW.
Enable IR Mode (internal pull-up resistor). This pin is sampled upon
power-up. If this pin is HIGH, then the TX output and RX input will
behave as the UART transmit data output and UART receive data
input. If this pin is LOW, then the TX output and RX input will behave
as the infrared encoder data output and the infrared receive data input.
Enable Auto RS-485 Half-Duplex Mode (internal pull-up resistor). This
pin is sampled upon power-up. If this pin is HIGH, then the RTS# out-
put can be used for Auto RTS Hardware Flow Control or as a general
purpose output. If this pin is LOW, then the RTS# output is the Auto
RS-485 Half-Duplex direction control pin.
Interrupt output (open-drain, active LOW). For proper operation, a
pull-up resistor is required on this pin.
UART Request-To-Send. This output can be used for Auto RTS Hard-
ware Flow Control, Auto RS-485 Half-Duplex direction control or as a
general purpose output. If unused, this pin should be left uncon-
nected.
General purpose I/O pin or UART Data-Terminal-Ready. If this pin is
an input and is unused, it should be connected to VCC or GND. If this
pin is an output and is unused, it should be left unconnected. See
IOControl[1] and IODir register.
General purpose I/O pin or UART Data-Terminal-Ready. If this pin is
an input and is unused, it should be connected to VCC or GND. If this
pin is an output and is unused, it should be left unconnected. See
IOControl[1] and IODir register.
Reset (active LOW) - A longer than 40 ns LOW pulse on this pin will
reset the internal registers and all outputs. The UART transmitter out-
put will be idle and the receiver input will be ignored.
UART Clear-To-Send. This input can be used for Auto CTS Hardware
Flow Control or as a general purpose input. If unused, this pin should
be connected to VCC or GND.
General purpose I/O pin or UART Data-Set-Ready. If this pin is an
input and is unused, it should be connected to VCC or GND. If this pin
is an output and is unused, it should be left unconnected. See IOCon-
trol[1] and IODir register.
General purpose I/O pin or UART Carrier-Detect. If this pin is an input
and is unused, it should be connected to VCC or GND. If this pin is an
output and is unused, it should be left unconnected. See IOControl[1]
and IODir register.
2
C-bus or SPI serial input clock. When the I
4
D
ESCRIPTION
2
C-bus interface is
REV. 1.0.1