ltc2845 Linear Technology Corporation, ltc2845 Datasheet - Page 8

• Manufacturer Part Number: ltc2845
• Description: 3.3v Software-selectable Mutiprotocol Transceiver
• Manufacturer: Linear Technology Corporation

W
LTC2845
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
Note 4: Driver 4 is enabled by D4ENB=0 (Pin 15).
Note 5: Receiver 4 is enabled by R4EN=1 (Pin 16).
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
0
0
0
0
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
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 4) (Note 1)
D1, D2,
D4, D5
V.11
V.11
V.11
V.11
V.28
V.11
V.28
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
30k
30k
30k
30k
30k
30k
30k
30k
30k
X
X
A
(Note 2)
R1
V.11
V.11
V.11
V.11
V.11
TTL
TTL
TTL
TTL
TTL
TTL
TTL
30k
30k
30k
30k
30k
30k
30k
30k
30k
30k
30k
D3
X
X
X
X
X
X
X
X
X
B
IN
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
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
A
Z
Z
A
when Z.
(Note 2)
D1
R2
V.11
V.11
V.11
V.11
V.11
V.11
V.11
V.11
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
30k
30k
B
Z
Z
Z
Z
Z
Z
B
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
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
A
Z
Z
A
(Note 2)
D2
R3
V.11
V.11
V.11
V.11
V.11
V.11
V.11
V.11
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
B
Z
Z
Z
Z
Z
Z
Z
Z
B
(Note 5) (Note 3) (Note 5)
(Note 2)
V.11
V.11
V.11
V.11
V.28
V.11
V.28
R4A
R5A
V.10
V.10
V.10
V.10
V.28
V.10
V.28
V.10
V.10
V.10
V.10
V.28
V.10
V.28
30k
30k
A
Z
Z
Z
Z
Z
Z
Z
Z
Z
D3
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
V.11
V.11
V.11
V.11
V.11
R1
B
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
(Note 4)
(Note 3)
R2, R3
R4, R5
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
V.10
V.10
V.10
V.10
V.28
V.10
V.28
V.10
V.10
V.10
V.10
V.28
V.10
V.28
D4A
D5A
Z
Z
Z
Z
sn2845 2845fs