TPS3809K33DBVR Integrated Circuits (ICs)

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1. Description

The TPS3809K33DBVR 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)=200ms, 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.

2. Features

    1. 3-pin SOT-23 package

    2. Supply current of 9 μA (typical)

    3. Precision supply voltage monitor 2.5 V, 3 V, 3.3 V, 5 V

    4. Pin-for-pin compatible with MAX 809

    5. Temperature range:  –40°C to +85°C

3. Applications

    1. Factory automation

    2. Wireless speakers

    3. Motor drives

    4. Servers

    5. Appliances

    6. Electricity meters

    7. Building automation

4. Pin Configuration

5. Pin Functions