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LTC2845 Datasheet(PDF) 8 Page - Linear Technology

Part # LTC2845
Description  3.3V Software-Selectable Multiprotocol Transceiver
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC2845 Datasheet(HTML) 8 Page - Linear Technology

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LTC2845
sn2845 2845fs
ODE SELECTIO
(Note 1)
(Note 4)
(Note 4) (Note 1)
D4A
MODE NAME
M2
M1
M0
DCE
D1, D2,
D3
D1
D2
D3
D5A
/DTE
D4, D5
A
B
A
B
A
B
Not Used
(Default V.11)
0
0
0
0
TTL
X
V.11
V.11
V.11
V.11
Z
Z
V.10
RS530A
0
0
1
0
TTL
X
V.11
V.11
V.10
Z
Z
Z
V.10
RS530
0
1
0
0
TTL
X
V.11
V.11
V.11
V.11
Z
Z
V.10
X.21
0
1
1
0
TTL
X
V.11
V.11
V.11
V.11
Z
Z
V.10
V.35
1
0
0
0
TTL
X
V.28
Z
V.28
Z
Z
Z
V.28
RS449/V.36
1
0
1
0
TTL
X
V.11
V.11
V.11
V.11
Z
Z
V.10
V.28/RS232
1
1
0
0
TTL
X
V.28
Z
V.28
Z
Z
Z
V.28
No Cable
1
1
1
0
X
X
Z
Z
Z
Z
Z
Z
Z
Not Used
(Default V.11)
0
0
0
1
TTL
TTL
V.11
V.11
V.11
V.11
V.11
V.11
V.10
RS530A
0
0
1
1
TTL
TTL
V.11
V.11
V.10
Z
V.11
V.11
V.10
RS530
0
1
0
1
TTL
TTL
V.11
V.11
V.11
V.11
V.11
V.11
V.10
X.21
0
1
1
1
TTL
TTL
V.11
V.11
V.11
V.11
V.11
V.11
V.10
V.35
1
0
0
1
TTL
TTL
V.28
Z
V.28
Z
V.28
Z
V.28
RS449/V.36
1
0
1
1
TTL
TTL
V.11
V.11
V.11
V.11
V.11
V.11
V.10
V.28/RS232
1
1
0
1
TTL
TTL
V.28
Z
V.28
Z
V.28
Z
V.28
No Cable
1
1
1
1
X
X
Z
Z
Z
Z
Z
Z
Z
MODE NAME
M2
M1
M0
DCE
/DTE
Not Used
(Default V.11)
0
0
0
0
RS530A
0
0
1
0
RS530
0
1
0
0
X.21
0
1
1
0
V.35
100
0
RS449/V.36
1
0
1
0
V.28/RS232
1
1
0
0
No Cable
1
1
1
0
Not Used
(Default V.11)
0
0
0
1
RS530A
0
0
1
1
RS530
0
1
0
1
X.21
0
1
1
1
V.35
100
1
RS449/V.36
1
0
1
1
V.28/RS232
1
1
0
1
No Cable
1
1
1
1
(Note 2)
(Note 3)
(Note 2)
(Note 2)
(Note 2)
(Note 5) (Note 3) (Note 5)
R1
R2
R3
R4A
R1
R2, R3
A
B
A
B
A
B
R5A
R4, R5
V.11
V.11
V.11
V.11
V.11
V.11
V.10
CMOS
CMOS
V.11
V.11
V.10
30k
V.11
V.11
V.10
CMOS
CMOS
V.11
V.11
V.11
V.11
V.11
V.11
V.10
CMOS
CMOS
V.11
V.11
V.11
V.11
V.11
V.11
V.10
CMOS
CMOS
V.28
30k
V.28
30k
V.28
30k
V.28
CMOS
CMOS
V.11
V.11
V.11
V.11
V.11
V.11
V.10
CMOS
CMOS
V.28
30k
V.28
30k
V.28
30k
V.28
CMOS
CMOS
30k
30k
30k
30k
30k
30k
30k
Z
Z
30k
30k
V.11
V.11
V.11
V.11
V.10
Z
CMOS
30k
30k
V.10
30k
V.11
V.11
V.10
Z
CMOS
30k
30k
V.11
V.11
V.11
V.11
V.10
Z
CMOS
30k
30k
V.11
V.11
V.11
V.11
V.10
Z
CMOS
30k
30k
V.28
30k
V.28
30k
V.28
Z
CMOS
30k
30k
V.11
V.11
V.11
V.11
V.10
Z
CMOS
30k
30k
V.28
30k
V.28
30k
V.28
Z
CMOS
30k
30k
30k
30k
30k
30k
30k
Z
Z
Note 1: Driver inputs are TTL level compatible.
Note 2: Unused receiver inputs are terminated with 30k to ground.
Note 3: Receiver outputs are CMOS level compatible and have a weak pull-up to VIN when Z.
Note 4: Driver 4 is enabled by D4ENB=0 (Pin 15).
Note 5: Receiver 4 is enabled by R4EN=1 (Pin 16).


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