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IMP1834AEMA 参数 Datasheet PDF下载

IMP1834AEMA图片预览
型号: IMP1834AEMA
PDF下载: 下载PDF文件 查看货源
内容描述: Duall 5V和3..3V mP在电力Supplly Superviissorss W /手册册Ressett [Duall 5V and 3..3V mP Power Supplly Superviissorss w/Manuall Ressett]
分类和应用: 电源电路电源管理电路
文件页数/大小: 8 页 / 247 K
品牌: A1PROS [ A1 PROS CO., LTD. ]
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IMP1834/A/D  
Application Information  
Reset Output Signal  
Reset output signals are valid as long as either voltage at 5VIN  
or 3.3VIN is above 1.2V. In addition, the IMP1834 has push-pull  
outputs that can remain valid below a 1.2V input level. To sink  
current below 1.2V, a resistor should be connected from the reset  
output to ground. This resistor guarantees a valid reset signal  
down to 0V. A 100kvalue is suggested.  
5V  
3.3V  
IMP1834A  
8
7
6
5
1
2
3
4
10k  
5VIN  
3.3VIN  
10kΩ  
The IMP1834A open drain reset outputs require pull-up resistors  
and must be low enough in value to pull the output into a HIGH  
state. Resistor value is not critical in most applications and a value  
of 10kis suggested. See Figure 5 and Figure 6.  
5VRESET 3.3VRESET  
5VTOL  
GND  
3.3VTOL  
PBRST  
The IMP1834A open drain reset outputs can be connected to the  
same potential through a single pull up resistor. In this configura-  
tion a failure on either supply will generate an active LOW reset.  
If the outputs are pulled-up to different voltages, the reset outputs  
(pin 2 and pin 7) should not be connected. See Figure 7.  
1834_07.eps  
Figure 6. IMP1834A Open Drain Output Pull-Up Resistor  
5V  
3.3V  
5V or 3.3V  
IMP1834A  
µP  
Input  
RESET  
10kΩ  
8
7
6
5
1
2
3
4
5VIN  
3.3VIN  
100kΩ  
5VRESET 3.3VRESET  
1834_06.eps  
5VTOL  
GND  
3.3VTOL  
PBRST  
Figure 5. IMP1834 RESET Valid to 0V  
1834_08.eps  
Figure 7. IMP1834A Wired “OR” Connection  
408-432-9100/www.impweb.com  
© 1999 IMP, Inc.  
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