xr16c2450ip Exar Corporation, xr16c2450ip Datasheet - Page 4
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xr16c2450ip
Manufacturer Part Number
xr16c2450ip
Description
Dual Uart With Higher Operating Speed And Lower Access Time
Manufacturer
Exar Corporation
Datasheet
1.XR16C2450IP.pdf
(31 pages)
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