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STMicroelectronics STM6719SFBWB6R
- Part No.:
- STM6719SFBWB6R
- Manufacturer:
- STMicroelectronics
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
STM6719SFBWB6R.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
STM6719SFBWB6R from STMicroelectronics is a dual-supply ultra-low-voltage supervisor IC with push-button reset, open-drain RST output, and adjustable third-supply monitoring via RSTIN pin. It monitors VCC1 (factory-trimmed threshold: 2.93 V) and VCC2 (factory-trimmed threshold: 1.58 V), guarantees RST state down to VCC ≥ 0.8 V, and delivers 13.2 ms/210 ms/900 ms selectable power-up reset delay - used in battery-powered networking equipment for reliable cold-start sequencing.
For engineers reviewing the STM6719SFBWB6R datasheet, STM6719SFBWB6R pinout, STM6719SFBWB6R application, or STM6719SFBWB6R equivalent, key selection criteria include its SOT23-6 open-drain RST output, dual fixed-threshold monitoring with external RSTIN flexibility, manual reset with no external debounce, and guaranteed operation at VCC1/VCC2 ≥ 0.8 V in low-power embedded systems.
Technical Context
This supervisor implements independent voltage comparators for VCC1 and VCC2 with factory-programmed thresholds (2.93 V and 1.58 V respectively), plus a high-impedance RSTIN input referenced to an internal 0.626 V bandgap. Reset assertion occurs if any monitored supply falls below its threshold or MR is pulled low.
The RST output is active-low open-drain, requiring an external pull-up to VCC1 (10 kΩ typical); it remains asserted for trec after all supplies recover and MR returns high. The device operates across –40 °C to +85 °C and draws only 11 µA typical supply current at 3.6 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.93 V (factory-trimmed; ensures reliable reset during 3.3 V rail brownout) |
| VCC2 Threshold | 1.58 V (factory-trimmed; supports monitoring of 1.8 V or 1.5 V auxiliary rails) |
| RSTIN Reference | 0.626 V internal reference; enables precise external resistor-divider threshold setting |
| Reset Delay (trec) | 13.2 ms / 210 ms / 900 ms (typical; selectable via factory option, not user-configurable) |
| Supply Current | 11 µA (typ at VCC1 = VCC2 = 3.6 V; critical for multi-year battery life in portable devices) |
| Operating Temp | –40 °C to +85 °C (industrial grade; validated for set-top box and industrial gateway environments) |
| RST Output Type | Active-low open drain; requires external pull-up, enabling wired-OR reset bus sharing |
Pinout & Package
SOT23-6 (WB) package: 6-pin surface-mount, 1.3 mm × 2.9 mm footprint, 1.45 mm height, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low open-drain reset output | Drives low on fault; requires external pull-up to VCC1; compatible with bi-directional processor reset pins |
| 2 - VCC1 | Primary supply voltage input | Monitored at 2.93 V threshold; powers internal circuitry and serves as RST pull-up reference |
| 3 - VCC2 | Secondary supply voltage input | Monitored at 1.58 V threshold; supports dual-rail supervision without external components |
| 4 - MR | Push-button manual reset input | Active-low with 50 kΩ internal pull-up; debounced internally; switch-to-VSS suffices |
| 5 - VSS | Ground reference | Common return for all supplies and logic; must be low-impedance for noise immunity |
| 6 - RSTIN | Adjustable reset comparator input | High-Z input referenced to 0.626 V; sets third threshold via external resistor divider (e.g., 3.3 V rail at 2.5 V) |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-threshold monitoring | VCC1 = 2.93 V, VCC2 = 1.58 V - eliminates external resistors for standard 3.3 V/1.8 V systems |
| Third adjustable supply monitor | RSTIN with 0.626 V reference - enables precise threshold setting for non-standard rails (e.g., 2.5 V, 1.2 V) |
| Open-drain RST with guaranteed state | RST valid down to VCC1 or VCC2 ≥ 0.8 V - ensures deterministic reset during deep brownout |
| No external debounce required | MR pin includes 50 kΩ internal pull-up and noise-immune logic - reduces BOM count and PCB area |
| Ultra-low quiescent current | 11 µA typical at 3.6 V - extends battery life in always-on IoT edge nodes and portable diagnostics tools |
Applications
| Set-Top Box Power Sequencing | Industrial Gateway Supervision |
|---|---|
|
Use Scenario: Coordinated startup of main SoC, memory, and peripheral rails after AC power restoration. IC Role / Device Role / Timing Role: Dual-rail supervisor ensuring VCC1 (3.3 V) and VCC2 (1.8 V) stabilize before releasing reset to ARM Cortex-A processor. Use Value: Prevents firmware corruption by enforcing minimum 210 ms reset hold time while tolerating 100 ms input ripple. |
Use Scenario: Monitoring redundant 5 V and 3.3 V DC/DC outputs in DIN-rail mounted communication gateways. IC Role / Device Role / Timing Role: Primary supervisor for main logic rail (VCC1) and backup management controller rail (VCC2), with RSTIN tracking isolated 2.5 V PHY supply. Use Value: Enables single-chip triple-rail supervision without external comparators or voltage dividers, reducing component count by 4 parts. |
| Portable Network Analyzer | Battery-Powered Sensor Hub |
|
Use Scenario: Cold-start reliability in handheld RF test equipment powered by Li-ion (3.0–4.2 V) and LDO-regulated 1.2 V core rail. IC Role / Device Role / Timing Role: Monitors battery-derived VCC1 (2.93 V trip) and regulated VCC2 (1.58 V trip); MR allows field technician-initiated hard reset. Use Value: 11 µA supply current extends 2000 mAh battery runtime to >12 months in sleep mode between measurements. |
Use Scenario: Ensuring clean boot of BLE microcontroller and analog sensor front-end after coin-cell power-up. IC Role / Device Role / Timing Role: Supervises 3.0 V MCU rail (VCC1) and 1.8 V sensor interface rail (VCC2); RSTIN tracks 0.9 V LDO output feeding op-amp bias. Use Value: Internal 0.626 V reference allows accurate sub-1 V rail monitoring without trimming resistors, improving production yield. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G18DBVR | Single-supply (VDD only); 1.8 V fixed threshold; no VCC2 or RSTIN inputs | Lacks dual-rail monitoring; cannot replace STM6719 in systems requiring independent 3.3 V/1.8 V supervision | Select only when supervising one rail and board space permits adding second supervisor IC |
| MAX6816EUT+T | Single VCC input; push-button debounced MR only; no voltage monitoring capability | Provides manual reset only - no supply monitoring; requires external comparators for rail supervision | Use solely for MR-only functions where voltage supervision is handled elsewhere |
Compared with TPS3808G18DBVR and MAX6816EUT+T, STM6719SFBWB6R uniquely integrates dual fixed-threshold monitoring, adjustable third-rail sensing, and open-drain RST in one SOT23-6 package - eliminating discrete comparators, resistors, and secondary supervisors in compact embedded designs.
Availability
STM6719SFBWB6R is available at Aetrix Electronics and suitable for set-top boxes, industrial gateways, portable analyzers, and battery-powered sensor hubs requiring stable component supply across extended product lifecycles.
Supply support for STM6719SFBWB6R includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.
The STM67xx family targets ultra-low-power, multi-rail supervision in space-constrained embedded systems - emphasizing factory-trimmed accuracy, guaranteed low-voltage operation, and minimal external component count.
FAQ
What is the function of the RSTIN pin on STM6719SFBWB6R?
The RSTIN pin is a high-impedance input referenced to an internal 0.626 V bandgap voltage. When the voltage at RSTIN falls below this reference, the RST output is asserted low. It enables precise monitoring of a third supply rail using an external resistor divider - for example, configuring a 2.5 V threshold by setting R1/R2 ratio to achieve 0.626 V at RSTIN when the rail is at 2.5 V.
Can STM6719SFBWB6R monitor three independent supply rails simultaneously?
Yes - it monitors VCC1 and VCC2 with factory-programmed thresholds (2.93 V and 1.58 V), and a third rail via RSTIN using the internal 0.626 V reference and an external resistor divider. All three comparators operate independently; RST asserts if any monitored voltage drops below its respective threshold or if MR is pulled low.
Is an external pull-up resistor required for the RST pin?
Yes - because RST is an active-low open-drain output, an external pull-up resistor to VCC1 is mandatory. STMicroelectronics specifies a 10 kΩ resistor as sufficient for most applications. Without it, RST cannot drive high, breaking reset release functionality and potentially causing system lockup during normal operation.
Does STM6719SFBWB6R support delayed manual reset via capacitor?
No - delayed manual reset (MRC pin) is exclusive to the STM6777/6778/6779/6780 variants. STM6719SFBWB6R includes only the standard MR pin with internal 50 kΩ pull-up and no capacitor-based timing; manual reset assertion is immediate and released after the fixed trec delay once MR returns high.
STM6719SFBWB6R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.05V, 2.925V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 8.8ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
STM6719SFBWB6R FAQ
1.How can I place an order for STM6719SFBWB6R through Aetrix?
Please submit a Request for Quotation (RFQ) for STM6719SFBWB6R on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STM6719SFBWB6R reliable?
The price and inventory of STM6719SFBWB6R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM6719SFBWB6R is usually 5 days.
3.What payment methods are accepted for STM6719SFBWB6R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM6719SFBWB6R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM6719SFBWB6R?
STM6719SFBWB6R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM6719SFBWB6R order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STM6719SFBWB6R?
For technical support, including STM6719SFBWB6R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM6719SFBWB6R requirements.
6.How does Aetrix verify that STM6719SFBWB6R is sourced from the original manufacturer or authorized distributors?
All STM6719SFBWB6R products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STM6719SFBWB6R meets industry standards.
7.What is the process for return or replacement of STM6719SFBWB6R?
All STM6719SFBWB6R units undergo pre-shipment inspection (PSI). If there is an issue with STM6719SFBWB6R, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STM6719SFBWB6R part is unused and in its original packaging.
Return procedure for STM6719SFBWB6R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM6719SFBWB6R Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
Diodes Incorporated
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APX803L20-29SA-7
Diodes Incorporated
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MCP130T-315I/TT
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MCP120T-475I/TT
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