SP809EK-L-2-9/TR 监控电路

SP809EK-L-2-9/TR

监控电路 3 PIN MICROPROCESSOR RESET CIRCUIT 3 Pin Microprocessor Supervisor Circuit

GENERAL DESCRIPTION

The SP809EK-L-2-9/TR SP809/SP810 are low power microprocessor (μP) supervisory circuits used to monitor power supplies in μP and digital systems.

They provide applications with benefits of circuit reliability and low cost by eliminating external components. If the VCC supply voltage falls below preset threshold then a reset signal is asserted for at least 140ms after VCC has risen above the reset threshold.

Both the SP809 and SP810 were designed with  a reset comparator to help identify invalid  signals, which last less than 140ms. The only  difference between them is that they have an  active-low RESET output and active-high RESET  output, respectively. Low supply current (1μA)  makes SP809/SP810 ideal for portable  equipment.

The devices are available in 3 pin SOT-23  package.

APPLICATIONS SP809EK-L-2-9/TR

• Portable Electronic Devices

• Electrical Power Meters

• Digital Still Cameras

• μP Power Monitoring

FEATURES SP809EK-L-2-9/TR

• Ultra Low Supply Current 1μA (typ)

• Guaranteed Reset valid to VCC = 0.9V

• 140ms Power-On Reset Pulse Width

• Internally Fixed Threshold

2.3V, 2.6V, 2.9V, 3.1V, 4.4V, 4.6V

• 1.5% Voltage Threshold Tolerance

• 3 Pin SOT-23 Package