Analog Devices MAX16056, MAX16057, MAX16058, and MAX16059 Nanopower Supervisory Circuits are ultra-low-current microprocessor supervisory circuits that monitor a single system supply voltage. These devices assert an active-low reset signal whenever the VCC supply voltage drops below the factory-trimmed reset threshold, manual reset is pulled low, or the watchdog timer runs out (MAX16056 and MAX16058). The reset output remains asserted for an adjustable reset timeout period after VCC rises above the reset threshold. Factory-trimmed reset threshold voltages are offered from 1.575V to 4.625V in approximately 100mV increments. These devices feature adjustable reset and watchdog timeout using external capacitors. The MAX16056 and MAX16058 contain a watchdog timer with a watchdog select input (WDS) that multiplies the watchdog timeout period by 128. The MAX16057 and MAX16059 do not have the watchdog feature. These devices are available in either push-pull or open-drain output-type configurations.
The Analog Devices MAX16056 and MAX16058 are offered in an 8-pin TDFN package, and the MAX16057 and MAX16059 are offered in a 6-pin TDFN package. These devices are fully specified over the -40°C to +125°C automotive temperature range.
Ultra-low 125na supply current
1.1V to 5.5V operating supply range
Configurable circuit enables flexible designs
Factory-set reset threshold options from 1.575V to 4.625V in approximately 100mV increments
Capacitor-adjustable reset timeout
Capacitor-adjustable watchdog timeout (MAX16056 and MAX16058)
Watchdog timer capacitor open detect function
Optional watchdog disable function (MAX16056 and MAX16058)
Push-pull or open-drain active-low reset output options