Description

The MAX16161/MAX16162 are ultra-low current, singlechannelsupervisory ICs. The devices monitor the powersupply voltage and assert a reset when the input voltagefalls below the reset threshold. After the monitoring voltagerises above the factory-set threshold voltage (VTH),the reset output remains asserted for the reset timeoutperiod and then deasserts, allowing the target microcontrolleror microprocessor to leave the reset state and beginoperating.Unlike conventional supervisors, which are unable to controlthe reset output state when VCC is very low, theMAX16161/MAX16162 reset output is guaranteed to remainasserted until after a valid VCC is achieved. Thisis especially important to avoid low-voltage cores leavingthe reset state during power-up or power-down. This alsoimproves performance when using the MAX16161/MAX16162 as simple power supply sequencers, becausethe devices will never cause a transient enable of a downstreampower supply due to output glitches.The MAX16161 features a manual reset (MR) input thatasserts a reset when it receives an appropriate input signal,which may be either active-low or active-high, dependingon the option. The MAX16162 has no MR input.Instead, it has separate VCC and VIN pins, allowingthreshold voltages as low as 0.6V. The reset output is active-low open-drain, and the MAX16161/MAX16162 offermultiple available reset timeout period options.The MAX16161/MAX16162 are specified over the -40°Cto +125°C temperature range and are available in tiny,1.06mm x 0.73mm, 4-bump WLP and 4-pin SOT23 packages. The MAX16162 is also available in a 5-pin SOT23 package.Applicationse-Readers/TabletsLow-Voltage Microcontrollers and MicroprocessorsPortable/Battery-Powered EquipmentSmart PhonesWearable/Portable Accessories