SLVS228D August   1999  – December 2020

PRODUCTION DATA  

  1. 1Features
  2. 2Applications
  3. 3Description
  4. 4Revision History
  5. 5Device Comparison
  6. 6Pin Configuration and Functions
  7. 7Specifications
    1. 7.1 Absolute Maximum Ratings (1) (1)
    2. 7.2 Recommended Operating Conditions
    3. 7.3 Dissipation Ratings
    4. 7.4 Electrical Characteristics
    5. 7.5 Timing Requirements
    6. 7.6 Switching Characteristics
    7. 7.7 Timing Diagram
    8. 7.8 Typical Characteristics
  8. 8Detailed Description
  9. 9Electrostatic Discharge Caution

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

3 Description

The TPS3809 family of supervisory circuits provides circuit initialization and timing supervision, primarily for DSPs and processor-based systems. The newer TLV809E device is an alternative with the same pins, functions and electrical parameters.

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.

Device Information
PART NUMBER PACKAGE (1) BODY SIZE (NOM)
TPS3809 SOT-23 (3), DBV 2.90 mm × 1.60 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
GUID-42CC39A4-CF0E-4E20-93C3-7EC2C49FE94C-low.gifTypical Application