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XR16C2450 Datasheet(PDF) 4 Page - Exar Corporation

No. de pieza XR16C2450
Descripción Electrónicos  2.97V TO 5.5V DUART
PDF  31 Pages
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Fabricante Electrónico  EXAR [Exar Corporation]
Página de inicio  http://www.exar.com
Logo EXAR - Exar Corporation

XR16C2450 Datasheet(HTML) 4 Page - Exar Corporation

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XR16C2450
xr
2.97V TO 5.5V DUART
REV. 1.0.0
4
RTSA#
32
36
33
O
UART channel A Request-to-Send (active low) or general
purpose output. If it is not used, leave it unconnected.
CTSA#
36
40
38
I
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.
DTRA#
33
37
34
O
UART channel A Data-Terminal-Ready (active low) or
general purpose output. If it is not used, leave it uncon-
nected.
DSRA#
37
41
39
I
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.
CDA#
38
42
40
I
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.
RIA#
39
43
41
I
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.
OP2A#
31
35
32
O
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.
TXB
12
14
8
O
UART channel B Transmit Data. If it is not used, leave it
unconnected.
RXB
9
10
4
I
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.
RTSB#
24
27
22
O
UART channel B Request-to-Send (active low) or general
purpose output. If it is not used, leave it unconnected.
CTSB#
25
28
23
I
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.
DTRB#
34
38
35
O
UART channel B Data-Terminal-Ready (active low) or
general purpose output. If it is not used, leave it uncon-
nected.
DSRB#
22
25
20
I
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.
CDB#
19
21
16
I
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.
Pin Description
NAME
40-PDIP
PIN #
44-PLCC
PIN #
48-TQFP
PIN #
TYPE
DESCRIPTION



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