STM802T/S/R:3V Supervisor

The STM690/704/795/802/804/805/806 supervisors are self-contained devices which provide microprocessor supervisory functions with the ability to non-volatize and write-protect external LPSRAM. A precision voltage reference and comparator monitors the VCCinput for an out-of-tolerance condition. When an invalid VCCcondition occurs, the reset output (RST) is forced low (or high in the case of RST). These devices also offer a watchdog timer (except for STM704/795/806) as well as a power-fail comparator (except for STM795) to provide the system with an early warning of impending power failure.

These devices are available in a standard 8-pin SOIC package or a space-saving 8-pin TSSOP package.

Key Features

  • RST orRST outputs
  • NVRAM supervisor for external LPSRAM
  • Chip enable gating (STM795 only) for external LPSRAM (7 ns max prop delay)
  • Manual (push-button) reset input
  • 200 ms (typ) trec
  • Watchdog timer - 1.6 s (typ)
  • Automatic battery switchover
  • Low battery supply current - 0.4 μA (typ)
  • Power-fail comparator (PFI/PFO )
  • Low supply current - 40 μA (typ)
  • GuaranteedRST (RST) assertion down to VCC = 1.0 V
  • Operating temperature: –40 °C to 85 °C (industrial grade)
  • RoHS compliance
    • Lead-free components are compliant with the RoHS directive
Product Specifications
DescriptionVersionSize
DS3898: 3 V supervisor with battery switchover9.1945 KB
Application Notes
DescriptionVersionSize
AN1957: Microprocessor supervisor functions2.0577 KB
AN1336: Power-fail comparator for NVRAM supervisory devices2.0127 KB
Technical Notes & Articles
DescriptionVersionSize
TN0941: Reset and supervisor ICs: frequently asked questions (FAQ)1.0328 KB
Flyers
DescriptionVersionSize
Resets and supervisors - portfolio overview1.01 MB
Watchdog ICs For automotive applications487 KB
Sample & Buy
Part NumberPackagePacking TypeRST Threshold (V) (typ)Operating Temperature (°C) (min)Operating Temperature (°C) (max)Unit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
STM802RM6FSO-8Tape And Reel2.63--0.981000NECEAR99MOROCCO
STM802SM6FSO-8Tape And Reel2.93--0.981000NECEAR99MOROCCO
STM802TM6FSO-8Tape And Reel3.08--0.981000NECEAR99MOROCCO
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
STM802RM6FSO-8IndustrialEcopack1
STM802SM6FSO-8IndustrialEcopack1
STM802TM6FSO-8IndustrialEcopack1
3 V supervisor with battery switchover STM805T-S-R
circuit_diagram_10519_thumbnail.png STM805T-S-R
Microprocessor supervisor functions STM805T-S-R
Power-fail comparator for NVRAM supervisory devices M41T60
Reset and supervisor ICs: frequently asked questions (FAQ) STM805T-S-R
Reset and supervisor ICs: frequently asked questions (FAQ) STM805T-S-R
Reset and supervisor ICs: frequently asked questions (FAQ) STM805T-S-R