器件名称: ILC1232
功能描述: mP Supervisory Circuit
文件大小: 75.2KB 共5页
简 介:Impala Linear Corporation
ILC1232
mP Supervisory Circuit
General Description The ILC1232 is a multifunction circuit which monitors microprocessor activity, external reset and power supplies in microprocessor based systems. The 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 (4.5V or 4.75V). The RST pin will remain logic low with VCC as low as 1.4V. The Watchdog input (ST) monitors mP activity and will assert RST if no mP 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, 150ms, 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 SO Package Applications Computers Controllers Critical Microprocessor Power Monitoring Intelligent Instruments Portable Equipment
Ordering Information
Part ILC1232N ILC1232M 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
VCC TD VCC P
ST RST TOL GND
ETC1232N - 8 Lead Plastic DIP Package……
