TPS3305
www.ti.com SLVS198C – DECEMBER 1998 – REVISED MARCH 2008 DUAL PROCESSOR SUPERVISORS
FEATURES DESCRIPTION 1 Dual Supervisory Circuits for DSP-and
Processor-Based Systems Power-On Reset Generator with Fixed Delay
Time of 200ms; no External Capacitor Needed Watchdog Timer Retriggers the RESET Output
at SENSEn ≥ VIT+ Temperature-Compensated Voltage Reference Maximum Supply Current of 40µA Supply Voltage Range: 2.7V to 6V Defined RESET Output From VDD ≥ 1.1V MSOP-8 and SO-8 Packages Temperature Range: –40°C to +85°C
2 APPLICATIONS Processor Supply Monitoring
Industrial Equipment
Automotive Systems
Portable/Battery-Powered Equipment
Wireless Communication Systems
Notebook/Desktop Computers The TPS3305 family is a series of micropower supply
voltage supervisors designed for circuit initialization.
Its dual monitor topology is well-suited to use in DSP
and processor-based systems, which often require
two supply voltages, core and I/O.
RESET is asserted when the voltage at either
SENSEn pin falls below its threshold voltage, VIT.
When both SENSEn pins are again above their
respective threshold voltages, RESET is held low for
the factory-programmed delay time (200ms typ).
RESET is also asserted if the watchdog input (WDI)
is not toggled for more than 1.6s typ. …
