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3793DC

Power-Voltage Monitoring IC with Watchdog Timer

Cypress Semiconductor 

Figure 8-3 Single-clock Input Monitoring (Positive Clock Pulse)

tCKW

CK1,

CK2

tCKT

Vth

CTP

MB3793-27D/28D/30D

VH

CTW

VL

/RESET

tWD

tWR

Note : The MB3793 can monitor only one clock.

The MB3793 checks the clock signal at every other input pulse.

Therefore, set watchdog timer monitor time tWD to the time that allows the MB3793

to monitor the period twice as long as the input clock pulse.

Document Number: 002-08488 Rev.*C

Page 11 of 24

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