1
dc1851af
DEMO MANUAL DC1851A
DESCRIPTION
LTC2872
Dual Multiprotocol Transceiver
with Integrated Termination
Demonstration circuit 1851A showcases the LTC
®
2872
RS232/RS485 dual multiprotocol transceiver with inte-
grated termination. Separate supply inputs power the
interface and logic sections, permitting operation of the
logic control and I/O down to 1.7V. LEDs indicate when
supplies are present. Control pins are accessible via tur-
rets for external connections, or they may be set high or
low by means of a jumper. All logic I/O and interface I/O
is routed to turrets. The RS485 interface lines are also
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
PERFORMANCE SUMMARY
available at a terminal block for convenient connection of
a transmission line. Because the LTC2872 contains half-/
full-duplex switching, it is unnecessary to jumper A and
B to Y and Z for half-duplex operation.
Design files for this circuit board are available at
http://www.linear.com/demo
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Input Supply
V
CC
Operating
V
L
Operating
3.0
1.7
5.5
V
CC
V
V
Maximum Data Rate
RS232
RS485
500
20
kbps
Mbps
Specifications are at T
A
= 25°C
