The MAX707/708 are cost−effective system supervisor circuits designed to monitor VCC in digital systems and provide a reset signal to the host processor when necessary. No external components are required.

The reset output is driven active within 20 sec of VCC falling through the reset voltage threshold. Reset is maintained with 200 mS of delay time after VCC rise above the reset threshold. The MAX707/708 have a low quiescent current of 12 μA at VCC = 3.3 V, an active−high RESET and active−low RESET with a push−pull output. The output is guaranteed valid down to VCC = 1.0 V. The MAX707/708 have a Manual Reset MR input and a +1.25 V threshold detector for power−fail input PFI. These devices are available in a Micro8 and SOIC−8 package.

Features

• Precision Supply−Voltage Monitor MAX707: 4.63 V Reset Threshold Voltage

MAX708: Standard Reset Threshold Voltages (Typical): 4.38 V, 3.08 V, 2.93 V, 2.63 V

• Reset Threshold Available from 1.6 V to 4.9 V with 100 mV Increments (Factory Option)

• 200 mS (Typ) Reset Timeout Delay

• 12μA (VCC = 3.3 V) Quiescent Current

• Active_High and Active_Low Reset Output

• Guaranteed RESET_L and RESET Output Valid to VCC = 1.0 V

• Voltage Monitor for Power−Fail or Low−Battery Warning

• 8 Pin SOIC or Micro8 Package

• Pb−Free Packages are Available

Applications

• Computers

• Embedded System

• Battery Powered Equipment

• Critical P Power Supply Monitor