TPS3305 Dual Processor Supervisory Circuit with Watchdog Timer | TI.com

TPS3305 (ACTIVE) Dual Processor Supervisory Circuit with Watchdog Timer

Dual Processor Supervisory Circuit with Watchdog Timer - TPS3305
Datasheet
 

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, 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.

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.

Features

  • 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
  • APPLICATIONS
    • Processor Supply Monitoring
    • Industrial Equipment
    • Automotive Systems
    • Portable/Battery-Powered Equipment
    • Wireless Communication Systems
    • Notebook/Desktop Computers

Parametrics

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Part number Order Threshold voltage 1 (Typ) (V) Number of supplies monitored VCC (Max) (V) VCC (Min) (V) Output driver type/reset output Time delay (ms) Features Rating Operating temperature range (C) Watchdog timer WDI (sec)
TPS3305 Order now 1.68
2.25
2.93
4.55    
2     6     2.7     Active-high
Active-low
Push-pull    
200     Active-low enable
Manual reset
Watchdog timer
Dual output    
Catalog     -40 to 85     1.6    
TPS3306 Order now 1.4
1.68
1.85
2.25
2.93
4.55    
3     6     2.7     Active-low
Open-drain    
100     Watchdog timer     Catalog     -40 to 85     0.8    
TPS3307 Order now Adjustable
1.68
2.25
2.93
4.55    
3     6     2     Active-low
Push-pull    
200     Active-low enable
Manual reset
Dual output    
Catalog     -40 to 85     None