TPS3809 3-pin voltage supervisor (reset IC) with active-low, push-pull reset | TI.com

TPS3809 (ACTIVE) 3-pin voltage supervisor (reset IC) with active-low, push-pull reset

3-pin voltage supervisor (reset IC) with active-low, push-pull reset - TPS3809
Datasheet
 

Description

The TPS3809 family of supervisory circuits provides circuit initialization and timing supervision, primarily for DSPs and processor-based systems.

During power-on, RESET is asserted when the supply voltage VDD becomes higher than 1.1 V. Thereafter, the supervisory circuit monitors VDD and keeps RESET active as long as VDD remains below the threshold voltage VIT. An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. The delay time, td(typ) = 200 ms, starts after VDD has risen above the threshold voltage VIT. When the supply voltage drops below the threshold voltage VIT, the output becomes active (low) again. No external components are required. All the devices of this family have a fixed sense-threshold voltage VIT set by an internal voltage divider.

The product spectrum is designed for supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V. The circuits are available in a 3-pin SOT-23. The TPS3809 devices are characterized for operation over a temperature range of –40°C to 85°C.

Features

  • 3-Pin SOT-23 Package
  • Supply Current of 9 7micro;A (Typical)
  • Precision Supply Voltage Monitor
    2.5 V, 3 V, 3.3 V, 5 V
  • Pin-For-Pin Compatible With MAX 809
  • Temperature Range:  –40°C to +85°C

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)
TPS3809 Order now 2.25
2.64
2.93
4.55    
1     6     2     Active-low
Push-pull    
200     Ease-of-use     Catalog     -40 to 85     None    
TPS3809-Q1 Order now 2.64
2.93
4.55    
1     6     2     Active-low
Push-pull    
200     Ease-of-use     Automotive     -40 to 125     None