Overview
Sample & Buy
Solutions
Resources
Tools & Software
Quality & Reliability
eDesignSuite
Get Started
Partner products
Sales Briefcase
  • The STM690A/692A/703/704/802/805/817/818/819 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 STM703/704/819) as well as a power-fail comparator (except for STM818) 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

    • 5 V operating voltage
    • NVRAM supervisor for external LPSRAM
    • Chip-enable gating (STM818 only) for external LPSRAM (7 ns max prop delay)
    • RST andRSToutputs
    • 200 ms (typ) trec
    • Watchdog timer - 1.6 sec (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

Circuit Diagram

Download Download

Recommended for you

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS3900
      5 V supervisor with battery switchover
      10.1
      1.11 MB
      PDF
      DS3900

      5 V supervisor with battery switchover

    • Description Version Size Action
      AN1957
      Microprocessor supervisor functions
      2.0
      577.14 KB
      PDF
      AN1336
      Power-fail comparator for NVRAM supervisory devices
      2.0
      127.81 KB
      PDF
      AN1957

      Microprocessor supervisor functions

      AN1336

      Power-fail comparator for NVRAM supervisory devices

    • Description Version Size Action
      TN0941
      Reset and supervisor ICs: frequently asked questions (FAQ)
      1.0
      328.63 KB
      PDF
      TN0941

      Reset and supervisor ICs: frequently asked questions (FAQ)

Publications and Collaterals

    • Description Version Size Action
      Resets and supervisors - portfolio overview 1.0
      1.31 MB
      PDF

      Resets and supervisors - portfolio overview

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STM818LM6F
Active
SO-8 Industrial Ecopack1
STM818MM6F
Active
SO-8 Industrial Ecopack1

STM818LM6F

Package:

SO-8

Material Declaration**:

Marketing Status

Active

Package

SO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack1

STM818MM6F

Package:

SO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack1

(**) 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.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) RST Threshold (V) (typ)
Budgetary Price (US$)*/Qty
More info
min
max
STM818LM6F Available at 3 distributors

Distributor availability ofSTM818LM6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 13360 1 Order Now
MOUSER WORLDWIDE 2653 1 Order Now
ANGLIA Live EUROPE 5000 2500 Order Now

Distributor reported inventory date: 2020-08-02

Distributor Name

DIGIKEY

Stock

13360

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

2653

Min.Order

1

Region

WORLDWIDE Order Now

ANGLIA Live

Stock

5000

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-02

Buy now
Active
EAR99 NEC Tape And Reel SO-8 - - 4.65 1.31 / 1k
MORE INFO

Unit Price (US$):

1.31

Country of Origin:

MOROCCO

STM818MM6F Available at 1 distributors

Distributor availability ofSTM818MM6F

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 2380 1 Order Now

Distributor reported inventory date: 2020-08-02

Distributor Name

MOUSER

Stock

2380

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-08-02

Buy now
Active
EAR99 NEC Tape And Reel SO-8 - - 4.4 1.31 / 1k
MORE INFO

Unit Price (US$):

1.31

Country of Origin:

MOROCCO

STM818LM6F

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.31 / 1k

Distributor availability ofSTM818LM6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 13360 1 Order Now
MOUSER WORLDWIDE 2653 1 Order Now
ANGLIA Live EUROPE 5000 2500 Order Now

Distributor reported inventory date: 2020-08-02

Distributor Name

DIGIKEY

Stock

13360

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

2653

Min.Order

1

Region

WORLDWIDE Order Now

ANGLIA Live

Stock

5000

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-02

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SO-8

Operating Temperature (°C)

(min)

-

(max)

-

RST Threshold (V) (typ)

4.65

Budgetary Price (US$)* / Qty

1.31 / 1k

Country of Origin

MOROCCO

STM818MM6F

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.31 / 1k

Distributor availability ofSTM818MM6F

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 2380 1 Order Now

Distributor reported inventory date: 2020-08-02

Distributor Name

MOUSER

Stock

2380

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-08-02

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SO-8

Operating Temperature (°C)

(min)

-

(max)

-

RST Threshold (V) (typ)

4.4

Budgetary Price (US$)* / Qty

1.31 / 1k

Country of Origin

MOROCCO

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