TPS3809K33DBVR PDBI 120ms Active Low 1 SOT-23 Monitors & Reset Circuit

Description

Description of the TPS3809 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 V DD becomes higher than 1.1 V. Thereafter, the supervisory circuit monitors V DD and keeps RESET active as long as V DD remains below the threshold voltage V IT . An internal timer delays the return of the output to the inactive state (high) to ensure a proper system reset. The delay time, t d(typ) = 200 ms, starts after V DD has risen above the threshold voltage V IT . When the supply voltage drops below the threshold voltage V IT , the output becomes active (low) again. No external components are required. All the devices of this family have a fixed sense-threshold voltage V IT 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 for the TPS3809 3-pin SOT-23 package Supply current of 9 µA (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 Specifications Attribute Value Reset Timeout 120ms Output Type Push Pull Reset Active Level Active Low Type of the Power Management Chip Simple reset/Power-on reset Threshold Voltage 2.93V Number of Voltages Monitored 1 Operating Temperature -40℃~+85℃@(TA) Applications: Applications Using DSPs, Microcontrollers, or Microprocessors Wireless Communication Systems Portable/Battery-Powered Equipment Programmable Controls Intelligent Instruments Industrial Equipment Notebook/Desktop Computers Automotive Systems TPS3809K33DBVR Datasheet

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