AAT3532

AAT3532 MicroPower™ Microprocessor Reset Circuit General Description The AAT3532 PowerManager™ product is a member of AATI’s Total Power Management ICs™ (TPMIC™) product family. It is a fully integrated device for monitoring microprocessor activity, external reset, and power supply conditions. The device holds the microprocessor in a reset condition for a minimum of 250ms while VCC is established to ensure correct system start-up. A manual reset can be initiated via a de-bounced input pin. As an additional level of protection, the AAT3532 includes a watchdog timer which requires a periodic strobe input from the microprocessor to ensure correct operation. The AAT3532 has a programmable watchdog timer and voltage tolerance level. The quiescent supply current is extremely low, typically 23µA. The AAT3532 is available in an 8-pin SOP package specified over -40° to 85°C temperature range. Features PowerManager™ Adjustable 4.5V or 4.75V Voltage Monitor 250ms (min) Reset Pulse Width Low quiescent current: typically 23µA Adjustable Watchdog Timer (150ms, 600ms, or 1200ms) De-bounced Manual Reset Input Operates down to 20ns strobe input pulse width No external components Temp range -40° to 85°C Standard 8 pin SOP package Pin compatible with MAX1232 Preliminary Information Applications Computers Controllers Telecom Equipment Embedded Systems Intelligent Instrumentation Automotive Typical Application VDD VCC PBRST RST RESET INPUT VDD AAT3532 TD ...