ltc2844 Linear Technology Corporation, ltc2844 Datasheet - Page 8

• Manufacturer Part Number: ltc2844
• Description: 3.3v Software-selectable Multiprotocol Transceiver
• Manufacturer: Linear Technology Corporation

W
LTC2844
8
ODE SELECTIO
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 V
MODE NAME
Not Used
(Default V.11)
RS530A
RS530
X.21
V.35
RS449/V.36
V.28/RS232
No Cable
Not Used
(Default V.11)
RS530A
RS530
X.21
V.35
RS449/V.36
V.28/RS232
No Cable
MODE NAME
Not Used
(Default V.11)
RS530A
RS530
X.21
V.35
RS449/V.36
V.28/RS232
No Cable
Not Used
(Default V.11)
RS530A
RS530
X.21
V.35
RS449/V.36
V.28/RS232
No Cable
M2
M2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
U
M1
M1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
M0
M0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
/DTE
/DTE
DCE
DCE
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
(Note 1) (Note 1) (Note 1)
V.11
V.11
V.11
V.11
V.28
V.11
V.28
30k
30k
30k
30k
30k
30k
30k
30k
30k
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
D1
D2
A
X
X
(Note 2)
R1
V.11
V.11
V.11
V.11
V.11
30k
30k
30k
30k
30k
30k
30k
30k
30k
30k
30k
TTL
TTL
TTL
TTL
TTL
TTL
TTL
D3
B
X
X
X
X
X
X
X
X
X
IN
V.11
V.10
V.11
V.11
V.28
V.11
V.28
V.11
V.10
V.11
V.11
V.28
V.11
V.28
30k
30k
TTL
TTL
TTL
TTL
TTL
TTL
TTL
D4
A
X
X
X
X
X
X
X
X
X
when Z.
(Note 2)
R2
V.11
V.11
V.11
V.11
V.11
V.11
V.11
V.11
30k
30k
30k
30k
30k
30k
30k
30k
V.11
V.11
V.11
V.11
V.28
V.11
V.28
V.11
V.11
V.11
V.11
V.28
V.11
V.28
B
A
Z
Z
D1
V.11
V.11
V.11
V.11
V.28
V.11
V.28
V.11
V.11
V.11
V.11
V.28
V.11
V.28
30k
30k
V.11
V.11
V.11
V.11
V.11
V.11
V.11
V.11
V.11
V.11
A
B
Z
Z
Z
Z
Z
Z
(Note 2)
R3
V.11
V.11
V.11
V.11
V.11
V.11
V.11
V.11
V.11
V.11
30k
30k
30k
30k
30k
30k
V.11
V.10
V.11
V.11
V.28
V.11
V.28
V.11
V.10
V.11
V.11
V.28
V.11
V.28
B
A
Z
Z
D2
(Note 2) (Note 3) (Note 3) (Note 3)
V.10
V.10
V.10
V.10
V.28
V.10
V.28
R4A
30k
30k
30k
30k
30k
30k
30k
30k
30k
V.11
V.11
V.11
V.11
V.11
V.11
V.11
V.11
B
Z
Z
Z
Z
Z
Z
Z
Z
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
V.11
V.11
V.11
V.11
V.28
V.11
V.28
R1
Z
Z
Z
Z
Z
Z
Z
Z
Z
A
Z
Z
Z
Z
Z
Z
Z
Z
Z
D3
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
V.11
V.11
V.11
V.11
V.11
R2
R3
Z
Z
B
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
D4A
V.10
V.10
V.10
V.10
V.28
V.10
V.28
R4
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
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