STM804T/S/R - 3 V supervisor with battery switchover - STMicroelectronics

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Product overview

Description

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 V_CCinput for an out-of-tolerance condition. When an invalid V_CCcondition 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.

All features
RST orRSToutputs

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) t_rec

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 V_CC= 1.0 V

Operating temperature: –40 °C to 85 °C (industrial grade)

RoHS compliance

Lead-free components are compliant with the RoHS directive
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Circuit Diagram

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Quality and Reliability

Part Number	Marketing Status	Package	Grade	RoHS Compliance Grade	Material Declaration**
STM804RM6F	Active	SO-8	Industrial	Ecopack3
STM804SM6F	Active	SO-8	Industrial	Ecopack3
STM804TM6F	Active	SO-8	Industrial	Ecopack3	PDF XML

STM804RM6F

Package:

SO-8

Material Declaration**:

STM804SM6F

Package:

SO-8

Material Declaration**:

STM804TM6F

Package:

SO-8

Material Declaration**:

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors

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