The TPS380x family of supervisory circuits monitor supply voltages to provide circuit initialization and timing supervision, primarily for DSPs and other processor-based systems.

These devices assert a push-pull RESET signal when the SENSE (adjustable version) or VDD (fixed version) drops below a preset threshold. The RESET output remains asserted for the factory programmed delay time after the SENSE or VDD return above its threshold.

The TPS380x devices, except the TPS3801-01, incorporate a manual reset input (MR). A low level at MR causes RESET to become active.

The TPS380x uses a precision reference to achieve an overall threshold accuracy of 2%—2.5%. These devices are available in a 5-pin SC-70 package, which is only about half the size of a 5-pin SOT-23 package.

The TPS380x devices are fully specified over a temperature range of –40°C to +85°C.

• Small, 5-Pin SC-70 (SOT-323) Package
• Supply Current of 9 µA
• Power-On Reset Generator With Fixed Delay Time
  • TPS3800 = 100 ms
  • TPS3801 = 200 ms
  • TPS3802 = 400 ms
• Precision Supply Voltage Monitor 1.8 V, 2.5 V, 2.7 V, 3 V, 3.3 V, 5 V, and Adjustable
• Manual Reset Input (Except TPS3801-01)
• Temperature Range:  –40°C to +85°C
• 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

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