V6170

· Standby mode, maximum current 35 mA
· Reset output guaranteed for V_DD voltage down to 1.2 V
· Comparator for voltage monitoring,voltage reference 1.17 V
· ±1.5% voltage reference accuracy at + 25 °C ±3% voltage reference accuracy for -40 to +85 °C
· Programmable reset voltage monitoring
· Voltage window, high threshold 5.9 V
· Programmable power-on reset (POR) delay
· Watchdog with programmable time window guarantees a minimum time and a maximum time between software clearing of the watchdog
· Time base accuracy ± 10%
· System enable (EN) output offers added security
· 3 chip select feed-thru circuit controlled by EN
· TTL / CMOS compatible
· -40 to +85 °C temperature range
· DIP8 and SO8 packages

The V6170 offers a high level of integration by voltage monitoring and software monitoring in an 8 lead package. A comparator monitors the voltage applied at the VIN input comparing it with an internal 1.17 V reference. The power-on reset function is initialized after VIN reaches 1.17 V and takes the reset output inactive after TPOR depending of external resistance. The reset output goes active low when the VIN voltage is less than 1.17 V or when VDD is higher than 5.9 V. The RES and EN outputs are guaranteed to be in a correct state for a supply voltage as low as 1.2 V. The watchdog function monitors software cycle time and execution. If the software clears the watchdog too quickly (incorrect cycle time) or too slowly (incorrect execution), it will cause the system to be reset. The system enable output prevents critical control functions being activated until software has successfully cleared the watchdog three times. Such a security could be used to prevent motor controls being energized on repeated resets of a faulty system.