Hex/Quad, Power-Supply Supervisory Circuits

The MAX6887/MAX6888 multivoltage supply supervisors provide several voltage-detector inputs, one watchdog input, and three outputs. Each voltage-detector input offers a factory-set undervoltage and overvoltage threshold. Manual reset and margin disable inputs offer additional flexibility.

The MAX6887 offers six voltage-detector inputs, while the MAX6888 offers four inputs. Output active-low RESET asserts when any input voltage drops below its respective undervoltage threshold or manual reset active-low MR is asserted. Output active-low OV asserts when any input voltage exceeds its respective overvoltage threshold. Monitor standard supply voltages listed in the Selector Guide in the full datasheet.

The MAX6887/MAX6888 offer a watchdog timer with an initial and normal timeout periods of 102.4s and 1.6s, respectively. Watchdog output active-low WDO asserts when the watchdog timer expires. Connect active-low WDO to manual reset input active-low MR to generate resets when the watchdog timer expires. RESET, OV, and WDO are active-low, open-drain outputs.

The MAX6887/MAX6888 are available in a 5mm x 5mm x 0.8mm, 16-pin thin QFN package and operate over the extended -40°C to +85°C temperature range.

Applications

* Multivoltage Systems * Networking * Servers/Workstations/Storage Systems * Telecom

* Hex/Quad Voltage Detectors

* Undervoltage and Overvoltage Thresholds

* 1% Threshold Accuracy

* Margining Disable and Manual Reset Input

* Watchdog Timer

* Open-Drain Active-Low RESET, Active-Low OV, and Active-Low WDO Outputs

* 180ms (min) Reset Timeout Period

* Few External Components

* Small 5mm x 5mm, 16-Pin Thin QFN Packages