參數(shù)資料
型號(hào): DS275
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: Line Driver or Receiver
英文描述: LINE TRANSCEIVER, PDIP8
封裝: 0.300 INCH, PLASTIC, DIP-8
文件頁(yè)數(shù): 8/19頁(yè)
文件大?。?/td> 1664K
代理商: DS275
MAX1480E/MAX1490E
±15kV ESD-Protected, Isolated RS-485/RS-422
Data Interfaces
16
______________________________________________________________________________________
DI
100
DE
RO
B
A
R
D
RE
RO
DE
DI
R
120
D
A
B
RE
DI
DE
RO
B
A
R
D
AC1 (MAKE NO CONNECTION)
AC2 (MAKE NO CONNECTION)
SHIELD
(OPTIONAL)
NOTE: RESISTOR R7 PROTECTS
THE MAX1480EA/MAX1480EC
FROM TRANSIENT CURRENTS
BETWEEN SHIELD AND
TRANSMISSION LINES.
ISO VCC1
B
D2
D1
VCC2
VCC1
ISO RO DRV
A
B
A
SH
ISO DI IN
ISO DE IN
VCC3
SD
FS
GND1
ISO COM1
ISO DI DRV
ISO VCC2
ISO DE DRV
GND2
DE
VCC4
DI
ISO COM2
ISO RO LED
VCC5
RO
R4
R5
R7
100
120
R1
R2
R3
R6
VIN
+5V
C1
22
F
C2
0.1
F
MAX1480EA/
MAX1480EC
LOGIC GROUND
ISOLATION BARRIER
ISOLATED COMMON
TERMINATING RESISTOR
(ONE RESISTOR ON EACH END)
DRIVER INPUT
DRIVER ENABLE
RECEIVER OUTPUT
DE
DI
RO
74HC86
OR EQUIVALENT
MAX487E
MAX1487E
MAX845E
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)
270pF
4kV
Figure 15. Typical Half-Duplex RS-485/RS-422 Network
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