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STMicroelectronics STM6719SFWB6R
- Part No.:
- STM6719SFWB6R
- Manufacturer:
- STMicroelectronics
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
STM6719SFWB6R.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,060
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Product details
Overview
STM6719SFWB6R 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: 2.63 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-on reset delay. Used in battery-powered embedded systems requiring reliable dual-rail power sequencing and manual reset.
For engineers reviewing the STM6719SFWB6R datasheet, STM6719SFWB6R pinout, STM6719SFWB6R application, or STM6719SFWB6R equivalent, key selection criteria include open-drain RST compatibility with bi-directional processor reset pins, RSTIN-based sub-1 V supply monitoring capability, factory-programmed dual-threshold accuracy (±1.5% over temperature), and SOT23-6 package suitability for space-constrained PCB layouts.
Technical Context
This supervisor implements independent voltage comparators for VCC1 and VCC2, each with factory-trimmed thresholds referenced to internal bandgap references. The RSTIN input connects to a dedicated comparator with a precise 0.626 V internal reference, enabling external resistor-divider configuration for monitoring voltages as low as 0.626 V.
RST assertion occurs when any monitored supply falls below its threshold or MR is pulled low; RST remains active for trec after all supplies recover and MR returns high. The open-drain RST output requires an external pull-up to VCC1 and supports direct interface to processors with bidirectional reset I/O pins without contention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.63 V ±1.5% - factory-programmed primary supply monitor for 2.7–3.3 V rails |
| VCC2 Threshold | 1.58 V ±1.5% - factory-programmed secondary supply monitor for 1.8 V domains |
| RSTIN Reference | 0.626 V - internal precision reference enabling adjustable monitoring of sub-1 V supplies (e.g., core logic) |
| Reset Delay (trec) | 13.2 / 210 / 900 ms (typ) - fixed internal timing options for power-up stabilization |
| Supply Current | 11 µA (typ) at VCC1 = VCC2 = 3.6 V - enables long battery life in portable applications |
| Operating Temp | –40 °C to +85 °C - industrial-grade thermal range for embedded and networking equipment |
| RST Output Type | Active-low open drain - requires external pull-up; compatible with bidirectional processor reset pins |
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 or MR assertion; requires external pull-up to VCC1 (e.g., 10 kΩ); safe for bidirectional reset interfaces |
| 2 - VCC1 | Primary supply voltage input | Monitored at 2.63 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 system supervision (e.g., I/O + core) |
| 4 - MR | Push-button manual reset input | Active-low with 50 kΩ internal pull-up; debounced by design; no external RC needed for basic use |
| 5 - VSS | Ground reference | Common return for all comparators, logic, and RST sink path; must be low-impedance |
| 6 - RSTIN | Adjustable reset comparator input | High-impedance node referenced to 0.626 V internal reference; sets third-supply threshold via external resistor divider |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed voltage monitors | VCC1 = 2.63 V, VCC2 = 1.58 V - eliminates external resistor networks and calibration for standard rails |
| Third-supply monitoring via RSTIN | 0.626 V internal reference - enables accurate monitoring of sub-1 V supplies (e.g., 0.8 V CPU cores) using two external resistors |
| Open-drain RST with guaranteed state | RST valid down to VCC1/VCC2 ≥ 0.8 V - ensures deterministic reset behavior during brownout and power-down sequences |
| Low quiescent current | 11 µA typical - reduces system standby power; critical for battery-backed or energy-harvesting designs |
| Three fixed reset timeout options | 13.2 ms / 210 ms / 900 ms - covers fast microcontroller startup, FPGA configuration, and complex SoC boot sequences |
Applications
| Portable Medical Sensors | Industrial IoT Gateways |
|---|---|
|
Use Scenario: Battery-powered wearable ECG sensor with dual-rail MCU (3.3 V I/O, 1.8 V core) and BLE radio. IC Role / Device Role / Timing Role: Monitors VCC1 (3.3 V), VCC2 (1.8 V), and RSTIN-adjusted 0.85 V core rail; asserts RST if any rail drops during cold start or battery sag. Use Value: Prevents firmware lockup due to partial power-up; 13.2 ms trec aligns with MCU internal oscillator stabilization time. |
Use Scenario: Edge gateway with ARM Cortex-A processor, DDR3 memory, and multiple PMIC outputs. IC Role / Device Role / Timing Role: Supervises main 5 V input (VCC1), 3.3 V I/O rail (VCC2), and 1.2 V DDR termination (via RSTIN divider); coordinates clean reset across subsystems. Use Value: Eliminates need for discrete comparators and timers; 900 ms trec accommodates slow-starting DC/DC converters feeding DDR termination. |
| Set-Top Box Power Management | Smart Home Hub Controllers |
|
Use Scenario: Consumer STB with multi-voltage SoC (1.1 V core, 1.8 V memory, 3.3 V peripherals) and remote-triggered reboot. IC Role / Device Role / Timing Role: Uses MR for IR-remote-initiated reset; monitors all three rails via VCC1/VCC2/RSTIN; open-drain RST avoids contention with SoC's bidirectional reset pin. Use Value: Enables zero-additional-component remote reset functionality; ±1.5% threshold accuracy ensures consistent trip points across temperature. |
Use Scenario: Voice-controlled smart hub with always-on mic preamp (2.8 V), application processor (1.2 V), and Wi-Fi module (3.3 V). IC Role / Device Role / Timing Role: VCC1 monitors 3.3 V Wi-Fi rail, VCC2 tracks 2.8 V audio rail, RSTIN configures 1.2 V processor rail; MR supports physical reset button. Use Value: Single-chip supervision replaces three discrete supervisors; 11 µA ICC extends battery backup runtime during AC loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326US26D3+ | Single-supply monitor (2.63 V only); no VCC2 or RSTIN; push-pull RST output | Lacks dual-rail and adjustable third-rail monitoring; unsuitable for systems requiring independent 1.8 V supervision | Select only if supervising one rail and needing push-pull drive without external pull-up |
| TPS3808G18DBVR | Single-supply (1.8 V), no secondary monitor; adjustable delay (0.5–10 s); open-drain RST | Cannot monitor VCC1+VCC2 simultaneously; RSTIN function absent; delay programmability trades off simplicity | Prefer when only 1.8 V rail supervision is required and long, user-configurable reset hold time is critical |
Compared with MAX6326US26D3+ and TPS3808G18DBVR, STM6719SFWB6R uniquely integrates dual factory-trimmed thresholds plus RSTIN-based third-rail flexibility in a single SOT23-6 package-enabling compact, calibrated triple-supply supervision without external components or configuration overhead.
Availability
STM6719SFWB6R is available at Aetrix Electronics and suitable for portable medical sensors, industrial IoT gateways, set-top box power management, and smart home hub controllers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for STM6719SFWB6R 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 specializing in microcontrollers, power management, analog, and sensing solutions for automotive, industrial, and consumer markets.
STM67xx is ST's ultra-low-power dual/triple voltage supervisor product line, designed specifically for space- and power-constrained embedded systems requiring precise, factory-calibrated rail monitoring and robust manual reset functionality.
FAQ
What is the function of the RSTIN pin on STM6719SFWB6R?
RSTIN is a high-impedance input referenced to an internal 0.626 V precision bandgap voltage. When used with an external resistor divider, it enables monitoring of a third supply rail (e.g., 0.8–3.3 V). The comparator asserts RST if the divided voltage falls below 0.626 V. This allows flexible, accurate supervision of sub-1 V core supplies without additional ICs.
Does STM6719SFWB6R support bidirectional processor reset pins?
Yes - its open-drain RST output is explicitly designed for safe interfacing with bidirectional reset I/O pins found on many ARM and DSP processors. A 4.7 kΩ series resistor between RST and the processor pin prevents logic contention, as confirmed in ST's Figure 11 application note. No level-shifting or additional buffering is required.
How is the reset timeout (trec) selected on STM6719SFWB6R?
trec is factory-programmed and fixed per device variant - STM6719SFWB6R provides 13.2 ms (typ), 210 ms (typ), or 900 ms (typ) delay. The specific value is encoded in the part number suffix (not visible in "SFWB6R" alone); users select the required trec option at order time (e.g., STM6719SWB6R = 13.2 ms). No external components or configuration pins are involved.
Can STM6719SFWB6R operate with VCC1 = 2.5 V and VCC2 = 1.2 V?
No - while the device guarantees RST functionality down to VCC1 or VCC2 ≥ 0.8 V, its specified operating range is VCC1/VCC2 = 0.8 V to 5.5 V. However, the 2.63 V VCC1 threshold and 1.58 V VCC2 threshold are factory-trimmed for nominal 2.7–3.3 V and 1.8 V rails respectively. Using 2.5 V on VCC1 risks undervolting the internal reference circuitry; 1.2 V on VCC2 falls below the 1.58 V threshold and will continuously assert RST.
STM6719SFWB6R 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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
STM6719SFWB6R FAQ
1.How can I place an order for STM6719SFWB6R through Aetrix?
Please submit a Request for Quotation (RFQ) for STM6719SFWB6R 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 STM6719SFWB6R reliable?
The price and inventory of STM6719SFWB6R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM6719SFWB6R is usually 5 days.
3.What payment methods are accepted for STM6719SFWB6R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM6719SFWB6R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM6719SFWB6R?
STM6719SFWB6R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM6719SFWB6R 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 STM6719SFWB6R?
For technical support, including STM6719SFWB6R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM6719SFWB6R requirements.
6.How does Aetrix verify that STM6719SFWB6R is sourced from the original manufacturer or authorized distributors?
All STM6719SFWB6R 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 STM6719SFWB6R meets industry standards.
7.What is the process for return or replacement of STM6719SFWB6R?
All STM6719SFWB6R units undergo pre-shipment inspection (PSI). If there is an issue with STM6719SFWB6R, 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 STM6719SFWB6R part is unused and in its original packaging.
Return procedure for STM6719SFWB6R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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