
8
LTC2844
sn2844 2844fs
ODE SELECTIO
W
U
(Note 2)
(Note 2) (Note 3) (Note 3) (Note 3)
R1
R2
R3
R4A
R1
R2
R4
ABAB
AB
R3
V.11
30k
CMOS
Z
V.11
V.10
30k
V.11
30k
CMOS
Z
V.11
30k
CMOS
Z
V.11
30k
CMOS
Z
V.28
30k
V.28
30k
V.28
30k
CMOS
Z
V.11
30k
CMOS
Z
V.28
30k
V.28
30k
V.28
30k
CMOS
Z
30k
Z
30k
V.11
V.10
Z
CMOS
30k
V.10
30k
V.11
V.10
Z
CMOS
30k
V.11
V.10
Z
CMOS
30k
V.11
V.10
Z
CMOS
30k
V.28
30k
V.28
30k
V.28
Z
CMOS
30k
V.11
V.10
Z
CMOS
30k
V.28
30k
V.28
30k
V.28
Z
CMOS
30k
Z
(Note 1) (Note 1) (Note 1)
MODE NAME
M2
M1
M0
DCE
D1
D3
D4
D1
D2
D3
D4A
/DTE
D2
ABABAB
Not Used
(Default V.11)
0000
TTL
X
TTL
V.11
ZZ
V.10
RS530A
0010
TTL
X
TTL
V.11
V.10
ZZZ
V.10
RS530
0100
TTL
X
TTL
V.11
ZZ
V.10
X.21
0110
TTL
X
TTL
V.11
ZZ
V.10
V.35
1000
TTL
X
TTL
V.28
Z
V.28
ZZZ
V.28
RS449/V.36
1010
TTL
X
TTL
V.11
ZZ
V.10
V.28/RS232
1100
TTL
X
TTL
V.28
Z
V.28
ZZZ
V.28
No Cable
1110
X
ZZZZZZ
Z
Not Used
(Default V.11)
0001
TTL
X
V.11
Z
RS530A
0011
TTL
X
V.11
V.10
Z
V.11
Z
RS530
0101
TTL
X
V.11
Z
X.21
0111
TTL
X
V.11
Z
V.35
1001
TTL
X
V.28
Z
V.28
Z
V.28
Z
RS449/V.36
1011
TTL
X
V.11
Z
V.28/RS232
1101
TTL
X
V.28
Z
V.28
Z
V.28
Z
No Cable
1111
X
ZZZZZZ
Z
MODE NAME
M2
M1
M0
DCE
/DTE
Not Used
(Default V.11)
0
RS530A
0
1
0
RS530
0
1
0
X.21
0
1
0
V.35
1
0
RS449/V.36
1
0
1
0
V.28/RS232
1
0
No Cable
1
0
Not Used
(Default V.11)
0
1
RS530A
0
1
RS530
0
1
0
1
X.21
0
1
V.35
1
0
1
RS449/V.36
1
0
1
V.28/RS232
1
0
1
No Cable
1
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.