Description

The HA16117F Series of ICs make a micro-processor (MPU) system fail-safe by monitoring its power supply to detect voltage drops, and monitoring a P-RUN (program running) pulse to detect system crashes. Also referred to as watchdog timers, these devices are essential in systems that aim for high levels of crash protection. Fabricated by a CMOS process, they consume little power and are ideally suited for battery-operated systems.

These ICs are available in versions for industrial and communications equipment and automotive applications, as well as for consumer products.

Features

• Low power consumption : Operating (ACC pin low) = 0.5 mW (Typ) : Standby (ACC pin high) = 0.2 mW (Typ)

• Watchdog timer on/off control by ACC input signal

• Independent auto-reset high and low times (tRH and tRL)

• Watchdog monitoring by frequency filtering (independent of duty cycle)

• High-precision low voltage detection (±2)

• Space- and weight-saving 8-pin SOP package