MAX1480 Maxim, MAX1480 Datasheet - Page 13

• Manufacturer Part Number: MAX1480
• Description: Complete / Isolated RS-485/RS-422 Data Interface
• Manufacturer: Maxim

Figure 3. MAX1480A Low-Power Shutdown Mode
Figure 4. Driver DC Test Load
_________________________________________________________________Test Circuits
ISOLATION BARRIER
SHUTDOWN
D
RO
DE
V
DI
5V
______________________________________________________________________________________
IN
V
OD
Complete, Isolated RS-485/RS-422
R
R
Si943304
R1
R2
V
OC
P
R3
GND1
GND2
Figure 5. Driver/Receiver Timing Test Circuit
V
V
V
V
V
GND
CC1
CC2
CC3
CC4
CC5
DE
SD
RO
D1
D2
FS
DI
DI
´
ISOLATION BARRIER
10
11
12
13
14
1
2
3
4
5
6
7
8
9
(DE
´
MAX845
)
D
ISOLATION BARRIER
V
ID
MAX1487
Data Interface
R
C
C
DIFF
L1
L2
27
28
26
25
24
23
22
21
20
19
18
17
16
15
ISOLATION BARRIER
AC1
AC2
ISO V
B
ISO RO DRV
A
ISO DI IN
ISO DE IN
ISO COM1
ISO DI DRV
ISO V
ISO DE DRV
ISO COM2
ISO RO LED
CC1
CC2
R
MAX1480A
* OPTOCOUPLER
( ) ARE FOR
THE MAX1480A/B/C
OUTPUTS. SEE FIGURES 1
AND 2 FOR DETAILED BLOCK
DIAGRAM AND TYPICAL
APPLICATION CIRCUIT.
RO (RO)*
13