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參數(shù)資料
| 型號(hào)： | DS2480B+ |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 19/32頁(yè) |
| 文件大小： | 0K |
| 描述： | IC LINE DRVR W/SENSOR 1-W 8-SOIC |
| 產(chǎn)品培訓(xùn)模塊： | 1-Wire Communications Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 100 |
| 類型： | 線路驅(qū)動(dòng)器，發(fā)射器 |
| 驅(qū)動(dòng)器/接收器數(shù)： | 1/0 |
| 規(guī)程： | RS232 |
| 電源電壓： | 4.5 V ~ 5.5 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SOIC |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁(yè)面： | 1429 (CN2011-ZH PDF) |
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DS2480B
Maxim Integrated........................................................................................................................................................................................... 26
Figure 11c. ±12V RS232
SIN
(RXD)
SOUT
(TXD)
UART
or C
Start
Stop
1
0
L
M
1-Wire Bus
Return
DTR
Power Stealing
GND
1-W
POL
VPP
VDD
RXD
TXD
DS2480B
RTS
See Text
2.7K
4.7V
5V
Regulator
6.8K
1 f
BSS110
S
D
+12VDC Programming
*
* only one DS950x ESD protection device with 5V
DS9503
In the interface to a true RS232C system (±12V, Figure 11c) the power for the DS2480B is stolen from
DTR and RTS. The software must make sure that at least one of these signals constantly provides the 12V
operating voltage. The 6.8k resistor and the 4.7V Zener diode in the TXD line limit the positive voltage
at the TXD pin of the DS2480B. The Schottky diode limits the negative voltage to 0.3V maximum. The
Schottky diode in series with capacitor forms a parasitic supply to generate the negative bias for the
host’s receive channel. The positive signal is switched in through the P-channel MOSFET that connects
to the RXD output of the DS2480B. In this circuit diagram the MOSFET switches the RXD line to +5V,
which normally is sufficient for RS232C systems.
Switching to 12V is also possible, but requires a P-channel transistor with a different threshold voltage.
The signal inversion caused by the transistor is compensated through the DS2480B by using a value code
of 100, 101, 110, or 111 for the RS232 baud rate setting.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS2480B | 制造商:Maxim Integrated Products 功能描述:IC SERIAL LINE DRIVER 2480 SOIC8 |
| DS2480B/T&R | 功能描述:緩沖器和線路驅(qū)動(dòng)器 RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| DS2480B+ | 功能描述:緩沖器和線路驅(qū)動(dòng)器 Serial - 1-Wire Line Driver RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| DS2480B+R | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Serial to 1-Wire Line Driver |
| DS2480B+T | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Serial to 1-Wire Line Driver |
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