XR16M781 Exar Corporation, XR16M781 Datasheet - Page 7

• Manufacturer Part Number: XR16M781
• Description: 1.62V TO 3.63V UART
• Manufacturer: Exar Corporation

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REV. 1.0.1
The M781 is typically used with RS-232, RS-485 and IR transceivers. The following figure shows typical
connections from the UART to the different transceivers. For more information on RS-232 and RS-485/422
transceivers, go to www.exar.com or send an e-mail to [e-mail].
F
2.2
IGURE
4. XR16M781 T
Serial Interface
UART
YPICAL
U A R T
DTR#
RTS#
DSR#
CTS#
GND
S
CD#
VCC
RI #
TX
RX
ERIAL
RS-485 Full-Duplex Serial Interface
R S - 2 3 2 F u ll -M o d e m S e r ia l In te r fa c e
D T R #
D S R #
R T S #
C T S #
G N D
C D #
V C C
R I#
T X
R X
1.62V TO 3.63V UART WITH 64-BYTE FIFO AND VLIO INTERFACE
I
NTERFACE
NC
NC
VCC
V C C
C
VCC
ONNECTIONS
7
VCC
DI
RO
DE
RE#
Transceiver
Full-duplex
T r a n s c e iv e r
RS-485
R 1 O U T
T 1 IN
T 2 IN
T 3 IN
R 5 O U T
R 2 O U T
R 3 O U T
R 4 O U T
G N D
R S -2 3 2
TX+
TX-
RX+
RX-
XR16M781