STM6779

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Dual/triple ultra-low voltage supervisors with push-button reset (with delay option)

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Product overview

Description

The STM6717/18/19/20 and STM6777/78/79/80 supervisors are a family of low-voltage/low-supply current processor (micro or DSP) supervisors, designed to monitor two (or three) system power supply voltages. They are targeted at applications such as set-top boxes (STBs), portable, battery-powered systems, networking, and communication systems. All device options have a push-button-type manual reset input (MR). The STM6777/78/79/80 also includes an option which enables the user to delay the start of the manual reset process from 6 μs (MRC pin left open) or more with external capacitor. The delay is implemented by connecting the appropriately sized capacitor between the MRC pin and VSS(typical 4 s delay with a 3.3 μF capacitor).
Two of the three supplies monitored (VCC1and VCC2) have fixed (customer-selectable, factory-trimmed) thresholds (VRST1and VRST2). The third voltage is monitored using an externally adjustable RSTIN threshold (0.626 V internal reference).
If any of the three monitored voltages drop below its factory-trimmed or adjustable thresholds, or if MRis asserted to logic low, a RSTis asserted (driven low). Once asserted, RSTis maintained at low for a minimum delay period (trec) after ALL supplies rise above their respective thresholds and MRreturns to high. These devices are guaranteed to be in the correct reset output logic state when VCC1and/or VCC2is greater than 0.8 V.
These devices are available in standard 5-pin or 6-pin SOT23 packages.
  • All features

    • Primary supply (VCC1) monitor. Fixed (factory-programmed) reset thresholds: 4.63 V to 1.58 V
    • Secondary supply (VCC2) monitor (STM6717/18/19/20/77/78)
    • Fixed (factory-programmed) reset thresholds: 3.08 V to 0.79 V
    • Tertiary supply monitor (using externally adjustable RSTIN): 0.626 V internal reference
    • RSToutputs (push-pull or open drain); state guaranteed if VCC1or VCC2≥ 0.8 V
    • Reset delay time (trec) on power-up: 13.2 ms, 210 ms, 900 ms (typ)
    • Manual reset input (MR)
    • Optional delayed manual reset input (MRC) with external capacitor (STM6777/78/79/80)
    • Low supply current - 11 μA (typ), VCC1= VCC2 = 3.6 V
    • Operating temperature: –40 °C to 85 °C (industrial grade)

Circuit Diagram

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STMicroelectronics - STM6779

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STM6779LWB6F
Active
SOT23-6L Industrial Ecopack3
STM6779SWB6F
Active
SOT23-6L Industrial Ecopack3
STM6779TWB6F
Active
SOT23-6L Industrial Ecopack3
STM6779VWB6F
Active
SOT23-6L Industrial Ecopack3
STM6779YWB6F
Active
SOT23-6L Industrial Ecopack3

STM6779LWB6F

Package:

SOT23-6L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-6L

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM6779SWB6F

Package:

SOT23-6L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-6L

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM6779TWB6F

Package:

SOT23-6L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-6L

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM6779VWB6F

Package:

SOT23-6L

Material Declaration**:

Marketing Status

Active

Package

SOT23-6L

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM6779YWB6F

Package:

SOT23-6L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-6L

Grade

Industrial

RoHS Compliance Grade

Ecopack3

(**) 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

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Part Number
Order from distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Voltage Reset 1 (V) (typ)
Budgetary Price (US$)*/Qty
Voltage Reset 2 (V) (typ)
Unit Price (US$)
Country of Origin
min
max
STM6779SWB6F No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tape and Reel SOT23-6L -40 85 2.925

-

0.6402

MALAYSIA

STM6779LWB6F Available at 1 distributors

Distributor availability ofSTM6779LWB6F

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 1128 1 Buy from Distributor

Distributor reported inventory date: 2022-08-08

Distributor Name

MOUSER

Stock

1128

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-08-08

Active
EAR99 NEC Tape and Reel SOT23-6L -40 85 4.625

-

0.6402

MALAYSIA

STM6779TWB6F No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tape and Reel SOT23-6L -40 85 3.075

-

0.6402

MALAYSIA

STM6779YWB6F Available at 3 distributors

Distributor availability ofSTM6779YWB6F

Distributor Name
Region Stock Min. Order Third party link
FUTURE WORLDWIDE 60 1 Buy from Distributor
MOUSER WORLDWIDE 13055 1 Buy from Distributor
Farnell Element14 EUROPE 44 1 Buy from Distributor

Distributor reported inventory date: 2022-08-08

Distributor Name

FUTURE

Stock

60

Min.Order

1

Region

WORLDWIDE Buy from Distributor

MOUSER

Stock

13055

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

44

Min.Order

1

Distributor reported inventory date: 2022-08-08

Active
EAR99 NEC Tape and Reel SOT23-6L -40 85 2.188

-

0.6402

MALAYSIA

STM6779VWB6F Available at 1 distributors

Distributor availability ofSTM6779VWB6F

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 2735 1 Buy from Distributor

Distributor reported inventory date: 2022-08-08

Distributor Name

MOUSER

Stock

2735

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-08-08

Active
EAR99 NEC Tape and Reel SOT23-6L -40 85 1.575

-

0.6402

MALAYSIA

STM6779SWB6F Active

Package:
SOT23-6L
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

STM6779SWB6F

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

85

Voltage Reset 1 (V) (typ):

2.925

Voltage Reset 2 (V) (typ):

-

Country of Origin:

MALAYSIA

No availability of distributors reported, please contact our sales office

STM6779LWB6F Active

Package:
SOT23-6L
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

STM6779LWB6F

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

85

Voltage Reset 1 (V) (typ):

4.625

Voltage Reset 2 (V) (typ):

-

Country of Origin:

MALAYSIA

Distributor availability ofSTM6779LWB6F

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 1128 1 Buy from Distributor

Distributor reported inventory date: 2022-08-08

Distributor Name

MOUSER

Stock

1128

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-08-08

STM6779TWB6F Active

Package:
SOT23-6L
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

STM6779TWB6F

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

85

Voltage Reset 1 (V) (typ):

3.075

Voltage Reset 2 (V) (typ):

-

Country of Origin:

MALAYSIA

No availability of distributors reported, please contact our sales office

STM6779YWB6F Active

Package:
SOT23-6L
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

STM6779YWB6F

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

85

Voltage Reset 1 (V) (typ):

2.188

Voltage Reset 2 (V) (typ):

-

Country of Origin:

MALAYSIA

Distributor availability ofSTM6779YWB6F

Distributor Name
Region Stock Min. Order Third party link
FUTURE WORLDWIDE 60 1 Buy from Distributor
MOUSER WORLDWIDE 13055 1 Buy from Distributor
Farnell Element14 EUROPE 44 1 Buy from Distributor

Distributor reported inventory date: 2022-08-08

Distributor Name

FUTURE

Stock

60

Min.Order

1

Region

WORLDWIDE Buy from Distributor

MOUSER

Stock

13055

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

44

Min.Order

1

Distributor reported inventory date: 2022-08-08

STM6779VWB6F Active

Package:
SOT23-6L
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

STM6779VWB6F

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

85

Voltage Reset 1 (V) (typ):

1.575

Voltage Reset 2 (V) (typ):

-

Country of Origin:

MALAYSIA

Distributor availability ofSTM6779VWB6F

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 2735 1 Buy from Distributor

Distributor reported inventory date: 2022-08-08

Distributor Name

MOUSER

Stock

2735

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-08-08

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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