MIC811/812
Microprocessor Reset Circuits General Description Features The MIC811 and MIC812 are inexpensive microprocessor
supervisory circuits that monitor power supplies in
microprocessor based systems. Precision voltage monitor for 3V, 3.3V or 5V power
supplies /RESET remains valid with VCC as low as 1V 5ОјA typical supply current 140ms minimum reset pulse width available Manual reset input Available in 4-pin SOT-143 package The function of this device is to assert a reset if either the
power supply drops below a designated reset threshold
level or /MR is forced low. Several different reset threshold
levels are available to accommodate 3V, 3.3V or 5V
powered systems.
The MIC811 has an active low /RESET output, while the
MIC812 offers an active high RESET output. The reset
output is guaranteed to remain asserted for a minimum of
140ms after VCC has risen above the designed reset
threshold level. Having a push-pull output stage, the
MIC811/812 does not require a pull-up resistor at the
output. The MIC811/812 comes in a 4-pin SOT-143
package. Applications Portable equipment
Intelligent instruments
Critical microprocessor power monitoring
Printers/computers
Controllers If a microprocessor voltage supervisor with an open-drain
output stage is needed, see MIC6315.
Datasheets and support documentation are available on …
