XR16L2450IJ-F Exar Corporation, XR16L2450IJ-F Datasheet - Page 4

• Manufacturer Part Number: XR16L2450IJ-F
• Description: 2.25 To 5.5V W/ 5V TOLERANT DUART
• Manufacturer: Exar Corporation

Specifications of XR16L2450IJ-F

• Features: *
• Number Of Channels: 2, DUART
• Fifo's: 1 Byte
• Protocol: RS232
• Voltage - Supply: 2.25 V ~ 5.5 V
• With False Start Bit Detection: Yes
• With Modem Control: Yes
• With Cmos: Yes
• Mounting Type: Surface Mount
• Package / Case: 44-LCC (J-Lead)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

XR16L2450
2.25V TO 5.5V DUART
PIN DESCRIPTIONS
DSRA#
DSRB#
CTSA#
DTRA#
OP2A#
RTSB#
CTSB#
DTRB#
CDA#
CDB#
N
RIA#
RIB#
RXB
TXB
AME
44-PLCC
P
40
37
41
42
43
35
14
10
27
28
38
25
21
26
IN
#
48-TQFP
P
38
34
39
40
41
32
22
23
35
20
16
21
IN
8
4
#
T
YPE
O
O
O
O
O
I
I
I
I
I
I
I
I
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.
UART channel A Data-Terminal-Ready (active low) or general purpose
output. If it is not used, leave it unconnected.
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 output 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 out-
put. 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 unconnected.
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.
UART channel B 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.
4
D
ESCRIPTION
xr
REV. 1.1.1