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ILC1832 Fiches technique(PDF) 1 Page - Impala Linear Corporation |
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ILC1832 Fiches technique(HTML) 1 Page - Impala Linear Corporation |
1 / 5 page ILC1832 µP Supervisory Circuit Impala Linear Corporation Impala Linear Corporation 1 (408) 574-3939 www.impalalinear.com October 1999 ILC1832 1.1 The ILC1832 is a multifunction circuit which monitors micro- processor activity, external reset and power supplies in microprocessor based systems. Ths circuit functions include a watchdog timer, power supply monitor, micro- processor 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 µP activity and will assert RST if no µP activity has occurred within the watchdog time- out period. The watchdog timeout period is selectable with nominal periods of 150, 600, or 1200 milliseconds. • 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 • 18µA Supply Current • Debounced External Reset Input • 8-Pin SOIC or DIP Package • Computers • Controllers • Critical Microprocessor Power Monitoring • Intelligent Instruments • Portable Equipment ILC1832 V CC Top View PBRST RST TD 2 1 8 6 RST GND ST TOL 4 3 5 7 ETC1832N - 8 Lead Plastic DIP Package ETC1832M - 8 Lead Plastic SOIC Package ILC1832 µµP V CC V CC V CC ST RESET PBRST RST TD GND TOL I/O Part Package Temp. Range ILC1832N 8-Lead PDIP -40°C to +85°C ILC1832M 8-Lead SOIC -40°C to +85°C General Description Features Applications Ordering Information Typical Circuit Pin-Package Configurations Preliminary |
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