Circuit Protection Misc Dual Pushbutton Controller

The MAX16124 pushbutton controllers with single-supply monitors monitor one or two pushbuttons and generate a hard reset signal if the buttons are pushed and held for a setup delay. These devices make it easy to “hide” the hard reset function in an existing pushbutton, such as a soft power switch. The devices operate from 1.6V to 5.5V and consume a quiescent current of only 5µA at 3V. The MAX16124 have pin-programmable or resistor-adjustable setup delay. Connect the SEL pin to GND, Vcc, or leave it unconnected to select the different setup delays or connect an external resistor from SEL to GND to set the setup delays. The MAX16124 have two identical manual reset inputs (MR1 and MR2) and one reset output (RESET). A deglitch block is connected to each input to add a delay to the falling edge with a fixed deglitch period of 20ms (tDB). The devices feature a comparator that monitors the input supply voltage. A variety of factory-trimmed threshold options accommodate different supply voltages and tolerances, eliminating external components. The factory set reset thresholds range from 1.58V to 4.63V to monitor 5V, 3.3V, 2.5V, and 1.8V supplies. The MAX16124 are offered in a tiny 0.86mm x 1.27mm, 6-bump WLP package and are specified over the automotive temperature range (-40°C to +125°C).

• Low Supply Current: < 5µA (typ) at 3V Over Temperature
• Precision Factory-Set Vcc Monitoring Threshold for1.8V, 2.5V, 3.3V, and 5V Supplies
• Fixed/Pin-Programmable or Resistor-AdjustablePushbutton Setup Delay
• Up to 2 Reset Outputs and 2 Debounced PushbuttonInputs
• Guaranteed RESET Valid for Vcc Down to 0.95V
• Active-Low RESET Output (Push-Pull or Open-Drain)
• Immune to Short Power-Supply Transients
• 0.86mm x 1.27mm 6-Bump WLP Package
• -40°C to +125°C Operating Temperature Range