TPS3305-18DRG4 Datasheet, PDF (1/18 Pages) Texas Instruments – DUAL PROCESSOR SUPERVISORS

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TPS3305
SLVS198C – DECEMBER 1998 – REVISED MARCH 2008
DUAL PROCESSOR SUPERVISORS
FEATURES
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•2 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 ≥ V_IT+
• Temperature-Compensated Voltage Reference
• Maximum Supply Current of 40µA
• Supply Voltage Range: 2.7V to 6V
• Defined RESET Output From V_DD ≥ 1.1V
• MSOP-8 and SO-8 Packages
• Temperature Range: –40°C to +85°C
APPLICATIONS
• Processor Supply Monitoring
• Industrial Equipment
• Automotive Systems
• Portable/Battery-Powered Equipment
• Wireless Communication Systems
• Notebook/Desktop Computers
DESCRIPTION
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, V_IT.
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.
The TPS3305-xx devices are available in either 8-pin
MSOP or SO packages, and are specified for
operation over a temperature range of –40°C to
+85°C.
TPS73233
3.3V
5V
V_IN
V_OUT
GND
D OR DGN PACKAGE
(TOP VIEW)
SENSE1
SENSE2
WDI
GND
V_DD
MR
RESET
RESET
External
Reset
Source
GND
V_{IN TPS73618} V_{OUT 1.8V}
V_DD
SENSE1
MR
SENSE2
TPS3305-18
RESET
WDI
GND
DSP
V_I/O
V_CORE
RESET
WDO
GND
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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