DUAL PROCESSOR SUPERVISORY CIRCUITS
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TPS3306-15 TPS3306-18, TPS3306-20 TPS3306-25, TPS3306-33
SLVS290C – APRIL 2000 – REVISED DECEMBER 2006
DUAL...
Description
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TPS3306-15 TPS3306-18, TPS3306-20 TPS3306-25, TPS3306-33
SLVS290C – APRIL 2000 – REVISED DECEMBER 2006
DUAL PROCESSOR SUPERVISORY CIRCUITS WITH POWER-FAIL
FEATURES
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: 7 V to 6 V Defined RESET Output From VDD≥ 1.1 V MSOP-8 and SO-8 Packages Temperature Range: –40°C to +85°C
APPLICATIONS
Multivoltage DSPs and Processors Portable Battery-Powered Equipment Embedded Control Systems Intelligent Instruments Automotive Systems
D OR DGK PACKAGE (TOP VIEW)
SENSE1 1 SENSE2 2
PFI 3 GND 4
TPS3306
8 VDD 7 WDI 6 PFO 5 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
AVDD
TPS3306–15
R3 R4
CVDD
SENSE1
VDD
DVDD
R1 SENSE2 WDI 1%
PFI PFO
B_XF TMS320 A_XF VC5441
R2
GND
RESET
1%
RESET VSS
VSSA
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