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MAX253ESA/V 数据表(PDF) 9 Page - Maxim Integrated Products

部件名 MAX253ESA/V
功能描述  Transformer Driver for Isolated RS-485 Interface
PDF  18 Pages
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制造商  MAXIM [Maxim Integrated Products]
网页  https://www.maximintegrated.com/en.html
标志 MAXIM - Maxim Integrated Products

MAX253ESA/V 数据表(HTML) 9 Page - Maxim Integrated Products

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Transformer Driver for
Isolated RS-485 Interface
_______________________________________________________________________________________
9
C3
0.1µF
C2
22µF
ISO 5V
ISOLATION
BARRIER
5V
VIN
1
8
5
C1
0.1µF
1N5817
MAX253
D1
D2
GND1 GND2
VCC
6
27
N.C.
SD
4
ON / OFF
10 x PC417
*74HC04 OR EQUIVALENT
** SEE TABLE 2
MAX205
EN
SD
C4
22µF
82
1N5817
MAX667
5
64
SHDN
SET
GND
IN
OUT
390
Ω
83
T1IN
T1OUT
390
Ω
*74HC04
T1IN
1
2
4
5
6
1
2
4
5
6
390
Ω
74HC04
T2IN
390
Ω
74HC04
T3IN
390
Ω
74HC04
T4IN
390
Ω
74HC04
T5IN
74HC04
R1OUT
74HC04
74HC04
74HC04
74HC04
R2OUT
R3OUT
R4OUT
R5OUT
5 X 3.3k
Ω
390
Ω
390
Ω
390
Ω
390
Ω
74
T2IN
T2OUT
15
2
T3IN
T3OUT
16
1
T4IN
T4OUT
22
19
T5IN
T5OUT
910
R1OUT
R1IN
65
R2OUT
R2IN
23
24
R3OUT
R3IN
17
18
R4OUT
R4IN
14
13
R5OUT
R5IN
VCC
20
21
GND
5 x 3.3k
Ω
1N5711
6
5
4
1
2
390
Ω
3.3k
Ω
VCC
ISO
ROUT
ROUT
1N5711
1
2
6
5
4
390
Ω
3.3k
Ω
VCC
ISO
TIN
TIN
*74HC04
4N25 LOWER SPEED, LOWER COST ALTERNATE OPTOCOUPLER CONFIGURATIONS (FOR DATA RATES BELOW 9.6kbps)
FS
3
74HCO4
4N25
ISO
GND
4N25
ISO
GND
1CT:1.3CT**
Figure 5. Typical RS-232 Application Circuit



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