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NCP803SN308T1-NCP803SN463T1
Very Low Supply Current 3-Pin Microprocessor Reset Monitor
NCP803
Very Low Supply Current
3-Pin Microprocessor
Reset Monitor
The NCP803 is a cost-effective system supervisor circuit designed
to monitor VCC in digital systems and provide a reset signal to the host
processor when necessary. No external components are required.
The reset output is driven active within 10 μsec of VCC falling
through the reset voltage threshold. Reset is maintained active for a
minimum of 140 msec after VCC rises above the reset threshold. The
NCP803 has an open drain active-low RESET output. The output of
the NCP803 is guaranteed valid down to VCC = 1.0 V and is available
in a SOT-23 package.
The NCP803 is optimized to reject fast transient glitches on the VCC
line. Low supply current of 1.0 μA (VCC = 3.2 V) make this device
suitable for battery powered applications.
Features Precision VCC Monitor for 2.5 V, 3.0 V , 3.3 V , and 5.0 V Supplies Precision Monitoring V oltages from 1.6 V to 4.9 V Available
in 100 mV Steps 140 msec Guaranteed Minimum RESET Output Duration RESET Output Guaranteed to VCC = 1.0 V Low 1.0 μA Supply Current VCC Transient Immunity Small SOT-23 Package No External Components Wide Operating Temperature: -40°C to 105°C
Typical Applications Computers Embedded Systems Battery Powered Equipment Critical μP Power Supply Monitoring
VCC
Figure 1. Typical Application Diagram0
