參數(shù)資料
型號(hào): MAX3480BCPI
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 通用總線功能
英文描述: Complete, Isolated, 3.3V RS-485/RS-422 Data Interface
中文描述: LINE TRANSCEIVER, PDIP28
封裝: 0.600 INCH, PLASTIC, MO-015AL, DIP-28
文件頁(yè)數(shù): 14/16頁(yè)
文件大小: 158K
代理商: MAX3480BCPI
M
Complete, Isolated, 3.3V
RS -485/RS -422 Data Interfac e
14
______________________________________________________________________________________
Figure 9. Typical RS-485/RS-422 Network
DI
DE
RO
B
A
R
D
RE
RO
DE
DI
R
120
D
A
B
RE
RE
DI
DE
RO
B
A
R
D
AC1 (MAKE NOCONNECTION)
AC2 (MAKE NOCONNECTION)
ISOV
CC1
SHIELD
(OPTIONAL)
B
D2
D1
V
CC2
V
CC1
ISORODRV
A
B
A
SH
ISODI IN
ISODE IN
V
CC3
SD
FS
GND1
ISOCOM1
ISODI DRV
ISOV
CC2
ISODE DRV
DE
GND2
V
CC4
DI
ISOCOM2
ISORO LED
V
CC5
RO
R4
R7
R5
R8
100
120
R6, 200
MAX3480A/B
LOGIC GROUND
ISOLATION BARRIER
ISOLATED COMMON
TERMINATING RESISTOR
(ONE RESISTOR ON EACH END)
MAX485
MAX487
MAX845
1
2
28
27
3
4
5
6
7
8
9
10
11
12
13
14
26
25
24
23
22
21
20
19
18
17
16
15
TERMINATING RESISTOR
(ONE RESISTOR ON EACH END)
D1, D2
1N914
R1
130
R2
R3
BOOSTED V+
DRIVER INPUT
DRIVER ENABLE
V
IN
3.0V to 3.6V
C1
22μF
6V
C2
0.1μF
C3
0.01
μ
F
16
14
12
5
7
13
15
8
2
DI
DE
RO
17
20
18
3
9
10
11
RECEIVER OUTPUT
6
4
74HC240
NOTE: RESISTOR R8
PROTECTS THE MAX3480
FROM TRANSIENT
CURRENTS BETWEEN
SHIELD AND “A” & “B”.
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