GENERAL DEscriptION

The SGM811B and SGM812B are integrated microprocessor supervisory devices which can be reset under power-up, power-down or even voltage reduction brownout conditions. When VCC is as low as 1V, the reset output can still operate. On the power-on state, the internal timer maintains a 200ms reset assertion, which keeps the microprocessor in the reset state until the condition is stable.

The SGM811B has an active-low nRESET output, while the SGM812B has an active-high RESET output. These devices provide three reset threshold voltage options for 3V and 3.3V voltage monitoring.

The devices also provide a manual reset (nMR) function. It can reduce damage if the device loses its control or is locked.

The SGM811B and SGM812B are available in a Green SOT-143 package. They operates over an junction temperature range of -40℃ to +125℃.

PIN CONFIGURATIONS

FEATURES

• Superior Upgrade for MAX811/MAX812 and ADM811/ADM812

• High Accuracy Fixed Detection Options: 3V and 3.3V

• Low Supply Current: < 1μA (TYP)

• 200ms (TYP) Power-on Reset Pulse Width

• Reset Output Options: Active-High nRESET Output

• Manual Reset Input

• Reset Valid Down to VCC = 1V

• -40℃ to +125℃ Operating Temperature Range

• Available in a Green SOT-143 Package

APPLICATIONS

Computers

Battery-Powered Applications

Portable Equipment

Automotive Equipment

Safety Systems

Intelligent Instruments

Critical μP Power Monitoring