參數資料
型號: MAX253
廠商: Maxim Integrated Products, Inc.
英文描述: Transformer Driver for Isolated RS-485 Interface
中文描述: 變壓器驅動器,用于隔離型RS-485接口
文件頁數: 8/16頁
文件大小: 230K
代理商: MAX253
M
Transformer Driver for
Isolated RS -485 Interfac e
8
_______________________________________________________________________________________
C3
0.1μF
C2
22μF
ISO5V
C4
22μF
ISOLATION
BARRIER
1N5817
5V
V
IN
1
8
3
5
C1
0.1μF
1N5817
MAX253
D1
D2
GND1 GND2
2
V
CC
6
7
N.C.
SD
4
ON / OFF
10 x PC417
*74HC04 OR EQUIVALENT
**
SEE TABLE 2
MAX205
EN
SD
8
2
MAX667
5
6
4
SHDN
SET
GND
IN
OUT
390
8
3
T1
IN
T1
OUT
390
*74HC04
T1
IN
1
2
4
5
6
1
2
4
5
6
390
74HC04
T2
IN
390
74HC04
T3
IN
390
74HC04
T4
IN
390
74HC04
T5
IN
74HC04
R1
OUT
74HC04
74HC04
74HC04
74HC04
R2
OUT
R3
OUT
R4
OUT
R5
OUT
5 X 3.3k
390
390
390
390
7
4
T2
IN
T2
OUT
15
2
T3
IN
T3
OUT
16
1
T4
IN
T4
OUT
22
19
T5
IN
T5
OUT
9
10
R1
OUT
R1
IN
6
5
R2
OUT
R2
IN
23
24
R3
OUT
R3
IN
17
18
R4
OUT
R4
IN
14
13
R5
OUT
R5
IN
V
CC
20
21
GND
5 x 3.3k
1N5711
6
5
4
1
2
390
3.3k
V
CC
ISO
R
OUT
R
OUT
ICT
:
1.3CT**
1N5711
1
2
6
5
4
390
3.3k
V
CC
ISO
T
IN
T
IN
*74HC04
4N25 LOWER SPEED, LOWER COST ALTERNATE OPTOCOUPLER CONFIGURATIONS (FOR DATA RATES BELOW 9.6kbps)
4N25
FS
74HCO4
ISO
GND
4N25
ISO
GND
Figure 5. Typical RS-232 Application Circuit
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