LTC2855 Linear Technology, LTC2855 Datasheet - Page 9

• Manufacturer Part Number: LTC2855
• Description: 3.3V 20Mbps RS485/RS422 Transceivers
• Manufacturer: Linear Technology

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FUNCTION TABLES
LTC2854
LTC2855
BLOCK DIAGRAMS
DE
DE
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
RO
RE
DE
DI
LOGIC INPUTS
LOGIC INPUTS
⎯ R ⎯ E
⎯ R ⎯ E
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
SLEEP/SHUTDOWN
LOGIC AND DELAY
DRIVER
RECEIVER
TE
TE
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
LTC2854
V
CC
GND
TRANSMIT WITH RECEIVE
TRANSMIT WITH RECEIVE
TRANSMIT WITH RECEIVE
TRANSMIT WITH RECEIVE
TRANSMIT WITH TERM
TRANSMIT WITH TERM
RECEIVE WITH TERM
RECEIVE WITH TERM
125k
R
125k
R
IN
IN
SHUTDOWN
SHUTDOWN
TERM ONLY
TERM ONLY
AND TERM
TRANSMIT
AND TERM
TRANSMIT
RECEIVE
RECEIVE
120Ω
R
MODE
MODE
TERM
A
25kV
TE
B
25kV
R
R
R
R
A, B
R
TERM
R
TERM
R
TERM
R
TERM
DRIVEN
DRIVEN
DRIVEN
DRIVEN
IN
IN
IN
IN
R
R
A, B
R
TERM
R
TERM
IN
IN
RO
RE
DE
DI
DRIVEN
DRIVEN
DRIVEN
DRIVEN
HIGH-Z
HIGH-Z
HIGH-Z
HIGH-Z
SLEEP/SHUTDOWN
LOGIC AND DELAY
DRIVER
Y, Z
RECEIVER
LTC2854/LTC2855
DRIVEN
DRIVEN
DRIVEN
DRIVEN
HIGH-Z
HIGH-Z
HIGH-Z
HIGH-Z
RO
LTC2855
V
CC
GND
DRIVEN
DRIVEN
DRIVEN
DRIVEN
HIGH-Z
HIGH-Z
HIGH-Z
HIGH-Z
RO
125k
R
125k
R
IN
IN
120Ω
R
TERM
TERMINATOR
285455 BD
TERMINATOR
OFF
OFF
OFF
OFF
ON
ON
ON
ON
A
(15kV)
TE
B
(15kV)
Z
(15kV)
Y
(15kV)
OFF
OFF
OFF
OFF
ON
ON
ON
ON
285455fa
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