The TPS3803 and TPS3805 families of supervisory circuits provide circuit initialization and timing supervision, primarily for DSPs and processor-based systems.
●The TPS3803G15 device has a fixed-sense threshold voltage VIT set by an internal voltage divider, whereas the TPS3803-01 has an adjustable SENSE input that can be configured by two external resistors. In addition to the fixed sense threshold monitored at VDD, the TPS3805 devices provide a second adjustable SENSE input. RESET is asserted in case any of the two voltages drops below VIT.
●During power on, RESET is asserted when supply voltage VDD becomes higher than 0.8 V. Thereafter, the supervisory circuit monitors VDD (and/or SENSE) and keeps RESET active as long as VDD or SENSE remains below the threshold voltage VIT. As soon as VDD (SENSE) rises above the threshold voltage VIT , RESET is deasserted again. The product spectrum is designed for 1.5 V, 3.3 V, and adjustable supply voltages. The devices are available in a 5-pin SC-70 package.
●The TPS3803 and TPS3805 devices are characterized for operation over a temperature range of -40°C to +85°C.
● Single Voltage Detector (TPS3803): Adjustable/1.5 V
● Dual Voltage Detector (TPS3805): Adjustable/3.3 V
● High ±1.5% Threshold Voltage Accuracy
● Supply Current: 3 µA Typical at VDD = 3.3 V
● Push/Pull Reset Output (TPS3805) Open-Drain Reset Output (TPS3803)
● Temperature Range: -40°C to +85°C
● 5-Pin SC-70 Package
● 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
●All trademarks are the property of their respective owners.
