XR16C850 Exar Corporation, XR16C850 Datasheet
XR16C850
Manufacturer Part Number
XR16C850
Description
Uart With 128-Byte Fifos And Infrared (IrDA) Encoder/decoder
Manufacturer
Exar Corporation
Datasheet
1.XR16C850.pdf
(55 pages)
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The XR16C850
receiver and transmitter (UART) and is pin compatible
with the ST16C550,ST16C650A, and TI’s TL16C750
UART. The 850 is an enhanced UART with 128 byte
FIFOs, automatic hardware/software flow control, and
data rates up to 1.5Mbps. It includes transmit/receive
FIFO counters to increase data loading and unloading
throughput. Onboard status registers provide error indi-
cations and operational status. Modem interface con-
trol is included and can be optionally configured to
operate with the Infrared (IrDA) encoder/decoder. Inter-
nal loopback allows onboard diagnostics. The 850 is
available in 40-pin PDIP, 44-pin PLCC, 48-pin TQFP,
and 52-pin QFP packages. The 44, 48, and 52 pin
versions provide both the standard (STD) mode or PC
mode. The STD mode is compatible with the ST16C450,
ST16C550, ST16C650A and TL16C750 while the PC
mode supports standard PC COM port connections.
The 40 PDIP pin package does not offer the PC mode.
Part Number
XR16C850CP 40
XR16C850CJ
XR16C850CM 48
XR16C850CQ 52
Note *1: Covered by U.S. patent # 5,649,122 and patent pending.
Note *2: Windows is a trademark of Microsoft Corporation.
Infrared transmitter and receiver encoder/decoder
Windows
Programmable, selectable transmit/receive trigger
GENERAL DESCRIPTION
FEATURES
Pin to pin compatible to ST16C550, ST16C650A and
TL16C750
Transmit/receive FIFO counters
128 bytes of Transmit/Receive FIFO
RS-485 half duplex direction control
Automatic software/hardware flow control
levels
Up to 1.5Mbps data rate
Sleep mode (100 A standby)
Small 7x7mm TQFP
+5 or 3.3 Volts operation
ORDERING INFORMATION
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 (510) 668-7000 FAX (510) 668-7017
Rev. 1.20
2
drivers available
Pins
44
*1
(850) is a universal asynchronous
Package Operating Temperature
PLCC
TQFP
PDIP
QFP
0° C to + 70° C
0° C to + 70° C
0° C to + 70° C
0° C to + 70° C
FIFO Counters and Half-duplex Control
-LPT1
Part Number
XR16C850IP
XR16C850IJ
XR16C850IM
XR16C850IQ
-BAUDOUT
RX
D5
D6
D7
TX
S2
A4
A5
A6
A7
RCLK
-CS2
N.C.
CS0
CS1
RX
D5
D6
D7
TX
10
11
12
13
14
15
16
17
7
8
9
10
11
12
13
14
15
16
17
7
8
9
UART with 128-byte FIFO’s
Pins
52
40
44
48
PLCC Package
CONNECTION
XR16C850CJ
Package Operating Temperature
"PC" MODE
PLCC
CONNECTION
TQFP
PDIP
XR16C850CJ
"STD" MODE
QFP
XR16C850
-40° C to + 85° C
-40° C to + 85° C
-40° C to + 85° C
-40° C to + 85° C
June 1999-1
39
38
37
36
35
34
33
32
31
30
29
39
38
37
36
35
34
33
32
31
30
29
RESET
-OP1
-DTR
-RTS
-OP2
N.C.
INT
-RXRDY
A0
A1
A2
RESET
-OP1
-DTR
-RTS
S3
GND
IRQA
IRQB
A0
A1
A2
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