Datasheet

LTC2870/LTC2871
12
28701f
BLOCK DIAGRAM
LTC2871
2871 BD
CONTROL
LOGIC
DRIVERS
RECEIVERS
LOOPBACK
PATH
0.1µF
DX232
DX485
RX232
RX485
TE485
H/F
CH2
DIN1
DIN2
RO
ROUT2
GND
RIN2
RIN1
Z
Y
DOUT1
DOUT2
V
EE
V
DD
1.7V TO 5.5V
(≤ V
CC
)
FEN
LB
RT232
RT485
2.2µF
10µH
220nF
3V TO 5.5V
DI
ROUT1
A
B
1µF
1µF
CAPSWV
CC
V
L
232
485
232
232
485
232
5k
RT232
RT485
5k
120
RT485
120
H/F
125k
125k
125k
125k
PULSE-SKIPPING
BOOST
REGULATOR
f = 1.2MHz