TPS3307 Triple Processor Supervisory Circuit | TI.com

TPS3307 (ACTIVE) Triple Processor Supervisory Circuit

Triple Processor Supervisory Circuit - TPS3307
Datasheet
 

Description

The TPS3307 family is a series of micropower supply voltage supervisors designed for circuit initialization primarily in DSP and processor-based systems, which require more than one supply voltage.

The product spectrum of the TPS3307-xx is designed for monitoring three independent supply voltages: 3.3V/1.8V/adj, 3.3V/2.5V/adj or 3.3V/5V/adj. The adjustable SENSE input allows the monitoring of any supply voltage >1.25V.

The various supply voltage supervisors are designed to monitor the nominal supply voltage.

During power-on, RESET is asserted when the supply voltage VDD becomes higher than 1.1V. Thereafter, the supply voltage supervisor monitors the SENSEn inputs and keeps RESET active as long as SENSEn remain below the threshold voltage VIT+.

An internal timer delays the return of the RESET output to the inactive state (high) to ensure proper system reset. The delay time, td (typ) = 200ms, starts after all SENSEn inputs have risen above the threshold voltage VIT+. When the voltage at any SENSE input drops below the threshold voltage VIT-, the RESET output becomes active (low) again.

The TPS3307-xx family of devices incorporates a manual reset input, MR. A low level at MR causes RESET to become active. In addition to the active-low RESET output, the TPS3307-xx family includes an active-high RESET output.

The devices are available in either 8-pin MSOP or standard 8-pin SO packages.

The TPS3307-xx devices are characterized for operation over a temperature range of -40°C to +85°C.

Features

  • Triple Supervisory Circuits for DSP andProcessor-Based Systems
  • Power-On Reset Generator With Fixed Delay Time of 200ms, No External Capacitor Needed
  • Temperature-Compensated Voltage Reference
  • Maximum Supply Current of 40µA
  • Supply Voltage Range: 2V to 6V
  • Defined RESET Output From VDD ≥ 1.1V
  • MSOP-8 and SO-8 Packages
  • Temperature Rang: -40°C to +85°C

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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)
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    
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    
TPS3307-18-Q1 Order now 2.93     3     6     2     Active-low
Push-pull    
200     Active-low enable
Manual reset
Dual output    
Automotive     -40 to 125     None