General Description

The MIC809 and MIC810 are inexpensive microprocessor supervisory circuits that monitor power supplies in microprocessor based systems.

The function of these devices is to assert a reset if the power supply drops below a designated reset threshold level. Several different reset threshold levels are available to accommodate 3V, 3.3V or 5V powered systems.

• Precision voltage monitor for 3V, 3.3V or 5V power supplies

• /RESET remains valid with VCC as low as 1.4V for SOT- 23 packaged part

• /RESET remains valid with VCC as low as 1V for SC70 packaged part

• Typically less than15µA supply current for SOT-23 packaged part

• 5µ typical supply current for SC70 packaged part

• 140ms minimum reset pulse widths available

• Available in 3-pin SOT-23 and SC-70 package

Applications

• Portable equipment

• Intelligent instruments

• Critical microprocessor power monitoring

• Printers/computers

• Controllers