LTC2803 LINER [Linear Technology], LTC2803 Datasheet - Page 10

• Manufacturer Part Number: LTC2803
• Description: Multiprotocol Transceiver
• Manufacturer: LINER [Linear Technology]

block DiagraM
LTC2872
10
15
16
36
10
11
13
37
38
22
23
12
14
25
24
33
32
9
7
8
H/F
FEN
LB
DXEN
RXEN1
TE485_1
485/232_1
DY1
DZ1
RA1
RB1
DXEN2
RXEN2
TE485_2
485/232_2
DY2
DZ2
RA2
RB2
LOOPBACK
TRANSCEIVER #1
TRANSCEIVER #2
PATH
1.7V TO 5.5V
(≤ V
0.1µF
CONTROL
CC
LOGIC
)
35
RECEIVERS
232
485
232
DRIVERS
V
485
L
232
232
RT232
RT485
RT232
BOOST REGULATOR
PULSE-SKIPPING
2.2µF
3V TO 5.5V
5k
5k
f = 1.2MHz
125k
21
34
V
GND
CC
22µH
125k
19
RT485
SW
470nF
17
H/F
120
CAP
125k
125k
RT485
120
GND
GND
GND
V
V
V
V
DD
Y1
A1
B1
Y2
A2
B2
CC
Z1
CC
Z2
2872 BD
EE
20
39
18
31
27
28
26
30
29
1
5
4
6
2
3
PORT 2
PORT 1
2.2µF
2.2µF
2872f