Datasheet Texas Instruments UCC2946PW — Ficha de datos



 SLUS247F -APRIL 1997 -REVISED NOVEMBER 2007  
   
       FEATURES
D Fully Programmable Reset Threshold
D Fully Programmable Reset Period
D Fully Programmable Watchdog Period
D 2% Accurate Reset Threshold
D Input Voltage Down to 2 V
D Input 18-ВµA Maximum Input Current
D Reset Valid Down to 1 V The UCCx946 is also resistant to glitches on the
VDD line. Once RES has been deasserted, any
drops below the threshold voltage need to be of
certain time duration and voltage magnitude to
generate a reset signal. These values are shown
in Figure 1. An I/O line of the microprocessor may
be tied to the watchdog input (WDI) for watchdog
functions. If the I/O line is not toggled within a set
watchdog period, programmable by the user,
WDO is asserted. The watchdog function is
disabled during reset conditions. DESCRIPTION
The UCCx946 is designed to provide accurate
microprocessor supervision, including reset and
watchdog functions. During power up, the device …