器件名称: ILC1832
功能描述:
文件大小: 78.67KB 共5页
简 介:Impala Linear Corporation
ILC1832
Preliminary
P Supervisory Circuit
General Description The ILC1832 is a multifunction circuit which monitors microprocessor activity, external reset and power supplies in microprocessor based systems. Ths circuit functions include a watchdog timer, power supply monitor, microprocessor reset, and manual pushbutton reset input. The power supply line is monitored with a comparator and an internal voltage reference. RST is forced low when an out-of-tolerance condition exists and remains asserted for at least 250ms after VCC rises above the threshold voltage (2.55V or 2.88V). The RST pin will remain logic low with VCC as low as 1.4V. The Watchdog input (ST) monitors P activity and will assert RST if no P activity has occurred within the watchdog timeout period. The watchdog timeout period is selectable with nominal periods of 150, 600, or 1200 milliseconds.
Features Power OK/Reset Time Delay, 250ms min. Watchdog Timer, 150 ms, 600ms, or 1.2s Typical Precision Supply Voltage Monitor, Select Between 5% or 10% of Supply Voltage 18A Supply Current Debounced External Reset Input 8-Pin SOIC or DIP Package Applications Computers Controllers Critical Microprocessor Power Monitoring Intelligent Instruments Portable Equipment
Ordering Information
Part ILC1832N ILC1832M Package 8-Lead PDIP 8-Lead SOIC Temp. Range -40°C to +85°C -40°C to +85°C
Typical Circuit
VCC
Pin-Package Configurations
Top View
PBRST 1 8 7
VCC
TD
VCC P
VCC ST RST RST
……
