XR16C2450IJ EXAR [Exar Corporation], XR16C2450IJ Datasheet - Page 4

• Manufacturer Part Number: XR16C2450IJ
• Description: 2.97V TO 5.5V DUART
• Manufacturer: EXAR [Exar Corporation]

XR16C2450
2.97V TO 5.5V DUART
Pin Description
DSRA#
DSRB#
RTSA#
CTSA#
DTRA#
OP2A#
RTSB#
CTSB#
DTRB#
CDA#
CDB#
N
RIA#
RXB
TXB
AME
40-PDIP
P
32
36
33
37
38
39
31
12
24
25
34
22
19
IN
9
#
44-PLCC
P
36
40
37
41
42
43
35
14
10
27
28
38
25
21
IN
#
48-TQFP
P
33
38
34
39
40
41
32
22
23
35
20
16
IN
8
4
#
T
YPE
O
O
O
O
O
O
I
I
I
I
I
I
I
I
4
UART channel A Request-to-Send (active low) or general
purpose output. If it is not used, leave it unconnected.
UART channel A Clear-to-Send (active low) or general
purpose input. This input should be connected to VCC
when not used. This input has no effect on the UART.
UART channel A Data-Terminal-Ready (active low) or
general purpose output. If it is not used, leave it uncon-
nected.
UART channel A Data-Set-Ready (active low) or general
purpose input. This input should be connected to VCC
when not used. This input has no effect on the UART.
UART channel A Carrier-Detect (active low) or general
purpose input. This input should be connected to VCC
when not used. This input has no effect on the UART.
UART channel A Ring-Indicator (active low) or general
purpose input. This input should be connected to VCC
when not used. This input has no effect on the UART.
Output Port 2 Channel A - The output state is defined by
the user and through the software setting of MCR[3]. INTA
is set to the active mode and OP2A# output to a logic 0
when MCR[3] is set to a logic 1. INTA is set to the three
state mode and OP2A# to a logic 1 when MCR[3] is set to
a logic 0. This output should not be used as a general out-
put else it will disturb the INTA output functionality. If it is
not used at all, leave it unconnected.
UART channel B Transmit Data. If it is not used, leave it
unconnected.
UART channel B Receive Data. Normal receive data input
must idle at logic 1 condition. If it is not used, tie it to VCC
or pull it high via a 100k ohm resistor.
UART channel B Request-to-Send (active low) or general
purpose output. If it is not used, leave it unconnected.
UART channel B Clear-to-Send (active low) or general
purpose input. This input should be connected to VCC
when not used. This input has no effect on the UART.
UART channel B Data-Terminal-Ready (active low) or
general purpose output. If it is not used, leave it uncon-
nected.
UART channel B Data-Set-Ready (active low) or general
purpose input. This input should be connected to VCC
when not used. This input has no effect on the UART.
UART channel B Carrier-Detect (active low) or general
purpose input. This input should be connected to VCC
when not used. This input has no effect on the UART.
D
ESCRIPTION
xr
REV. 1.0.0