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参数资料
| 型号： | DS2480S |
| 英文描述： | Serial 1.Wire Line Driver |
| 中文描述： | 串行1.Wire线驱动器 |
| 文件页数： | 21/26页 |
| 文件大小： | 185K |
| 代理商： | DS2480S |
DS2480
042498 21/26
HARDWARE APPLICATION EXAMPLES
This section discusses five typical application scenarios
of the DS2480. When directly designed into a new prod-
uct, the device can be connected as shown in Figure
10a.
The circuit becomes more complex if a 1–Wire bus is to
be interfaced to a port that provides and expects
inverted signals, but does not necessarily meet the
RS232C (
±
12V) standard (Figure 10b).
UART DIRECT
Figure 10a
START
1–WIRE BUS
RETURN
V
DD
V
PP
RXD
TXD
POL
1–W
GND
UART
OR
μ
C
SIN (RXD)
SOUT (TXD)
12V
(5V)
STOP
0
1
L
M
5V
DS2480
+/(–) 5V RS232
Figure 10b
START
1–WIRE BUS
RETURN
V
DD
V
PP
RXD
TXD
POL
1–W
GND
UART
OR
μ
C
5V
(5V)
STOP
0
1
L
M
DTR
VOLTAGE
REGULATOR
DS2480
12V
RTS
RXD
TXD
GND
SEE TEXT
POWER
STEALING
DRIVER/
LEVEL SHIFTER
The signals DTR and RTS provide the power to operate
the DS2480. The resistor in the TXD line and the
Schottky diode limit the negative voltage at the TXD pin
of the DS2480 to 0.3V maximum. The resistor is typi-
cally 4.7 k
. If the inverting driver is current–limited to 1
mA the resistor is not required.
From the DS2480’s perspective, this circuit will work
with inverted signals of
±
5V as well as 0 to 5V. Depend-
ing on the voltage levels the host expects, it may be nec-
essary to generate a negative voltage on the RXD line.
Figure 10c shows how this can be accomplished for a
true RS232C system.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2482-100 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Single-Channel 1-Wire Master |
| DS2482-100_12 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Single-Channel 1-Wire Master |
| DS2482-101 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Single-Channel 1-Wire Master with Sleep Mode |
| DS2482-101_12 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Single-Channel 1-Wire Master with Sleep Mode |
| DS2482-800 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:8-Channel 1-Wire Master |
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