SG Micro SGM811C/SGM812C

The SGM811C and SGM812C are integrated microprocessor supervisory devices which can be reset under power-up, power-down or even voltage reduction brownout conditions. When V_CC 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 SGM811C has an active-low nRESET output, while the SGM812C has an active-high RESET output. These devices provide six reset threshold voltage options for 2.5V, 3V, 3.3V and 5V voltage monitoring.

These devices also provide a manual reset (nMR) function. 

Key features

• Superior upgrade for MAX811/MAX812 and ADM811/ADM812
• High Accuracy Fixed Detection Options: 2.5V, 3V, 3.3V and 5V
• SGM811C has an active-low nRESET output
• SGM812C has an active-high RESET output

Additional features

• Superior upgrade for MAX811/MAX812 and ADM811/ADM812
• High accuracy fixed detection options: 2.5V, 3V, 3.3V and 5V
• Low supply current: < 1μA (TYP)
• 200ms (TYP) power-on reset pulse width
• Reset output options:
  • Active-low nRESET output: SGM811C
  • Active-high RESET output: SGM812C
     
• Manual reset input
• Reset valid down to V_CC = 1V
• Available in a green SOT-143 package

Applications

• Battery powered applications
• Portable equipment
• Automotive equipment
• Safety systems
• Intelligent instruments
• Critical μP power monitoring