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TPS3306-15
TPS3306-18, TPS3306-20
TPS3306-25, TPS3306-33
SLVS290A – APRIL 2000 – REVISED MAY 2004
DUAL PROCESSOR SUPERVISORY CIRCUITS WITH POWER-FAIL
FEATURES
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Dual Supervisory Circuits With Power-Fail for
DSP and Processor-Based Systems
Voltage Monitor for Power-Fail or Low-Battery
Warning
Watchdog Timer With 0.8 Second Time-Out
Power-On Reset Generator With Integrated
100 ms Delay Time
Open-Drain Reset and Power-Fail Output
Supply Current of 15 µA (Typ.)
Supply Voltage Range . . . 2.7 V to 6 V
Defined RESET Output From V
DD
≥
1.1 V
MSOP-8 and SO-8 Packages
Temperature Range . . . - 40°C to 85°C
APPLICATIONS
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Multivoltage DSPs and Processors
Portable Battery-Powered Equipment
Embedded Control Systems
Intelligent Instruments
Automotive Systems
D OR DGK PACKAGE
(TOP VIEW)
SENSE1
SENSE2
PFI
GND
1
2
3
4
8
7
6
5
V
DD
WDI
PFO
RESET
DESCRIPTION
The TPS3306 family is a series of supervisory circuits designed for circuit initialization which require two supply
voltages, primarily in DSP and processor-based systems.
The product spectrum of the TPS3306-xx is designed for monitoring two independent supply voltages of
3.3 V/1.5 V, 3.3 V/1.8 V, 3.3 V/2 V, 3.3 V/2.5 V, or 3.3 V/5 V.
TYPICAL OPERATING CIRCUIT
3.3 V
1.5 V
AV
DD
TPS3306–15
SENSE1
R1
1%
SENSE2
PFI
R2
1%
GND
V
DD
WDI
PFO
RESET
R3
R4
CV
DD
DV
DD
B_XF
A_XF
RESET
V
SS
V
SSA
TMS320
VC5441
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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.
Copyright © 2000–2004, Texas Instruments Incorporated
TI [ TEXAS INSTRUMENTS ]
