CYT809 Datasheet, PDF (1/4 Pages) List of Unclassifed Manufacturers – 3-Pin Microprocessor Reset Monitor (Preliminary)

3-Pin Microprocessor
Reset Monitor
(Preliminary)
CYT809
Description
Features
The CYT809 is a cost-effective system
supervisor Integrated Circuit (IC) designed to
monitor V_CC in digital and mixed signal systems and
provide a warning signal when the system power
supply is out of working range, and a reset signal to
the host processor when necessary. No external
components are required.
The reset output is driven active within 20µsec
of V_CC falling through the reset voltage threshold.
Reset is maintained active for a minimum of
140msec after V_CC rises above the reset threshold.
The CYT809 has an active-low RESET output. The
output of the CYT809 is guaranteed valid down to
Precision V_CC Monitor for 2.8V, 3.0V, 3.3V, and
5.0V Supplies
140msec Guaranteed Minimum RESET Output
Duration
RESET Output Guaranteed to V_CC=1.0V
Low 18µA Supply Current
V_CC Transient Immunity
Small SOT-23 Package
No External Components
Wide Operating Temperature: 0°C to 85°C
V_CC=1V. Both devices are available in a SOT-23
package.
The CYT809 is optimized to reject fast transient
glitches on the V_CC line. Low supply current of 18µA
(V_CC=3.3V) makes these devices suitable for battery
powered applications.
Application
Computers
Embedded systems
Battery powered equipment
Critical µP power supply monitoring
Pin Configuration
Application Diagram
Vcc
Vcc
CYT809
RESET
Vcc
PROCESSOR
RESET
INPUT
GND
GND
Preliminary and all contents are subject to change without prior notice.
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