UNISONIC TECHNOLOGIES CO.
, LTD
84NXX
Advance
CMOS IC
LOW QUIESCENT CURRENT
PROGRAMMABLE-DELAY
SUPERVISORY CIRCUIT
DESCRIPTION
The 84NXX can monitor and provide reset function for system
voltages from 0.
4V which is the microprocessor supervisory circuit.
If the SENSE
voltage falls below its threshold (VIT), the
voltage of manual reset ( MR ) is pulled to a logic low, the RESET signal will be asserted.
The reset
voltage can be factory-set from 0.
9V to 5V, while the 84NXX reset
voltage is adjustable with an external resistor divider.
When SENSE
voltage and MR exceed their thresholds, RESET is driven to a logic high after a user-programmable delay time.
The 84NXX has a very low quiescent, ...