TPS3306-15, TPS3306-18, TPS3306-20, TPS3306-25, TPS3306-33
DUAL PROCESSOR SUPERVISORY CIRCUITS WITH POWER-FAIL
SLVS290 – APRIL 2000
Dual Supervisory Circuits With Power-Fail
Applications Include
for DSP and Processor-Based Systems
– Multivoltage DSPs and Processors
– Portable Battery-Powered Equipment
– Embedded Control Systems
– Intelligent Instruments
Voltage Monitor for Power-Fail or
Low-Battery Warning
Watchdog Timer With 0.8 Second Time-Out
– Automotive Systems
Power-On Reset Generator With Integrated
100 ms Delay Time
D OR DGK PACKAGE
(TOP VIEW)
Open-Drain Reset and Power-Fail Output
Supply Current of 15 µA (TYP.)
Supply Voltage Range . . . 2.7 V to 6 V
SENSE1
SENSE2
PFI
V
DD
WDI
1
2
3
4
8
7
6
5
Defined RESET Output From V
MSOP-8 and SO-8 Packages
≥ 1.1 V
DD
PFO
GND
RESET
Temperature Range . . . – 40°C to 85°C
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
CV
DV
TPS3306–15
SENSE1
DD
DD
R3 R4
V
DD
R1
1%
SENSE2
PFI
WDI
PFO
B_XF
TMS320
VC5441
A_XF
R2
1%
RESET
GND
RESET
V
V
SS
SSA
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.
Copyright 2000, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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