STM6904/STM6905 Current Processor Supervisors

Quadruple and quintuple ultra-low voltage supervisor with push-button reset

Image of STMicroelectronics' STM6904 / STM6905The STM6905 supervisor is a low voltage/low supply current processor supervisor, designed to monitor up to five system power supply voltages. This device is targeted at applications such as set-top boxes (STBs), portable, battery-powered systems, and networking and communication systems.

The device supports a push-button type manual reset input (MR). Two of the five supply monitors (VCC and V2IN) have fixed (customer-selectable, factory-trimmed) thresholds (VRST1 and VRST2). The other three voltage monitor inputs (V3IN, V4IN and V5IN) are monitored using externally adjustable threshold (600 mV internal reference) to meet specific level requirements.

If any of the five monitored voltages drops below its factory-trimmed or adjustable thresholds, or if the MR is asserted to logic low, the reset output RST is asserted (driven low). Once asserted, RST is maintained Low for a minimum delay period (trec) after ALL monitored supplies rise above their respective thresholds and MR returns to High. Reset output logic state is valid for VCC greater than 0.8 V.

Features Applications
  • Primary supply (VCC) monitor (factory-programmed) fixed 3.078 V to 2.866 V (6905) or 2.188 V (6904)
  • Second fixed (V2IN) monitor (factory programmed) fixed 2.333 V to 1.050 V (6905) or 1.110 (6904)
  • Three more adjustable supply monitor inputs
  • Accuracy ± 1.8% (± 1% at 25°C)
  • Low supply current of 12 µA (typ)
  • Standby mode active low
  • Operating temperature: -40°C to 85°C
  • Set-top boxes
  • Multi-voltage systems
  • Cable/satellite applications
  • Computer systems
  • Data storage equipment

STM6904/STM6905

ImageManufacturer Part NumberDescriptionAvailable Quantity
STM6905PWEDS6F datasheet linkIC SUPERVISOR QUINTUPLE 8-MSOPSTM6905PWEDS6FIC SUPERVISOR QUINTUPLE 8-MSOP3115 - Immediate
STM6905PWEDS6F product page link
STM6904PWEDS6F datasheet linkIC SUPERVISOR ULV QUAD 8-MSOPSTM6904PWEDS6FIC SUPERVISOR ULV QUAD 8-MSOP310 - Immediate
STM6904PWEDS6F product page link
Published: 2009-10-27