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IMP805LMJA PDF预览

IMP805LMJA

更新时间: 2024-10-27 22:31:11
品牌 Logo 应用领域
IMP 电池微处理器监控
页数 文件大小 规格书
10页 227K
描述
レP POWER SUPPLY SUPERVISOR WITH BATTERY BACKUP SWITCH

IMP805LMJA 数据手册

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IMP690A, 692A, 802L, 802M, 805L  
Pin Description  
Pin Number  
IMP690A/IMP692A  
IMP802L/IMP802M  
IMP805L  
Name  
Function  
1
1
VOUT  
Voltage supply for RAM. When VCC is above the reset threshold, VOUT  
connects to VCC through a P-channel MOS device. If VCC falls below the  
reset threshold, this output will be connected to the backup supply at  
VBATT (or VCC, whichever is higher) through the MOS switch to provide  
continuous power to the CMOS RAM.  
+5V power supply input  
Ground  
2
3
4
2
3
4
VCC  
GND  
PFI  
Power failure monitor input. PFI is connected to the internal power fail  
comparator which is referenced to 1.25V. The power fail output (PFO)  
is active LOW but remains HIGH if PFI is above 1.25V. If this feature is  
unused, the PFI pin should be connected to GND or VOUT  
.
5
6
5
6
PFO  
WDI  
Power-fail output. PFO is active LOW whenever the PFI pin is less than  
1.25V.  
Watchdog input. The WDI input monitors microprocessor activity. An  
internal timer is reset with each transition of the WDI input. If WDI is held  
HIGH or LOW for longer than the watchdog timeout period, typically 1.6  
seconds, RESET (or RESET) is asserted for the reset pulse width time,  
tRS, of 140ms, minimum.  
7
––––  
RESET  
Active-LOW reset output. When triggered by VCC falling below the reset  
threshold or by watchdog timer timeout, RESET (or RESET) pulses low  
for the reset pulse width, tRS, typically 200ms. It will remain low if VCC is  
below the reset threshold (4.65V in the IMP690A/IMP802L and 4.4V in  
the IMP692A/IMP802L) and remains low for 200ms after VCC rise above  
the reset threshold.  
––––  
8
7
8
RESET  
VBATT  
Active-HIGH reset output. The inverse of RESET.  
Auxiliary power or backup-battery input. VBATT should be connected to  
GND if the function is not used. This input has about 40mV of hysteresis  
to prevent rapid toggling between VCC and VBATT  
.
Absolute Maximum Ratings  
Continuous Power Dissipation  
Pin Terminal Voltage with Respect to Ground  
Plastic DIP (derate 9mW/°C above 70°C) . . . 800mW  
SO (derate 5.9mW/°C above 70°C) . . . . . . . . 500mW  
CerDIP (derate 8mW/°C above 70°C) . . . . . . 650mW  
Operating Temperature Range (C Devices) . . . . 0°C to 70°C  
Operating Temperature Range (E Devices) . . . . 40°C to 85°C  
Storage Temperature Range . . . . . . . . . . . . . . . . . 65°C to 160°C  
Lead Temperature Soldering, (10 sec) . . . . . . . . 300°C  
VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3V to 6.0V  
VBATT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3V to 6.0V  
All Other Inputs* . . . . . . . . . . . . . . . . . . . 0.3V to (VCC + 0.3V)  
Input Current at VCC . . . . . . . . . . . . . . . . . . 200mA  
Input Current at VBATT . . . . . . . . . . . . . . . . . 50mA  
Input Current at GND . . . . . . . . . . . . . . . . . 20mA  
Output Current:  
VOUT . . . . . . . . . . . . . . . Short circuit protected  
All Other Inputs . . . . . . . . . . . . . . . . . . . 20mA  
Rate of Rise: VBATT and VCC . . . . . . . . . . 100V/µs  
* The input voltage limits on PFI and WDI may be exceeded if the  
current is limited to less than 10mA  
These are stress ratings only and functional operation is not implied.  
Exposure to absolute maximum ratings for prolonged time periods may  
affect device reliability.  
3

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