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STMicroelectronics STM6777SVWB6F
- Part No.:
- STM6777SVWB6F
- Manufacturer:
- STMicroelectronics
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
STM6777SVWB6F.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,615
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Product details
Overview
STM6777SVWB6F from STMicroelectronics is a dual ultra-low voltage supervisor IC with push-button reset and factory-programmed delay option, monitoring VCC1 (primary) and VCC2 (secondary) supplies while supporting delayed manual reset via MRC pin. It features active-low open-drain RST output, 11 µA typical supply current at 3.6 V, –40 °C to +85 °C industrial temperature range, and fixed reset thresholds of 4.63 V (VCC1) and 3.08 V (VCC2). It is used in battery-powered networking equipment requiring reliable power-on and manual reset sequencing.
For engineers reviewing the STM6777SVWB6F datasheet, STM6777SVWB6F pinout, STM6777SVWB6F application, or STM6777SVWB6F equivalent, key selection criteria include dual-supply monitoring capability, MRC-based manual reset delay configurability, open-drain RST output compatibility with bi-directional processor reset pins, and guaranteed reset assertion down to VCC ≥ 0.8 V.
Technical Context
The device implements independent comparator-based monitoring of two supply rails (VCC1 and VCC2), each with factory-trimmed reset thresholds-4.63 V for VCC1 and 3.08 V for VCC2-and guarantees RST assertion when either falls below its threshold. The MRC pin enables external capacitor-controlled delay (≥6 µs) on manual reset initiation, decoupling button press timing from system-level reset propagation.
Its open-drain RST output requires an external pull-up resistor (e.g., 10 kΩ to VCC1) and remains asserted low for a minimum trec delay (13.2 ms / 210 ms / 900 ms typ) after all monitored supplies recover and MR returns high. Internal logic ensures valid reset state even when VCC1 or VCC2 ≥ 0.8 V, enabling robust operation during brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.63 V fixed factory-trimmed; ensures reliable reset assertion when primary supply drops below nominal 5 V rail. |
| VCC2 Threshold | 3.08 V fixed factory-trimmed; monitors secondary 3.3 V supply with ±1.5% accuracy over temperature. |
| Reset Delay (trec) | 13.2 ms typical; provides sufficient hold time for microprocessor initialization after power stabilization. |
| Supply Current | 11 µA typical at VCC1 = VCC2 = 3.6 V; enables multi-year battery life in portable systems. |
| Operating Temp | –40 °C to +85 °C; qualified for industrial environments including set-top boxes and telecom edge devices. |
| RST Output Type | Active-low open drain; supports wired-OR reset bus architectures and interfaces directly with bi-directional processor reset I/O. |
| MR Input | Push-button compatible with internal 50 kΩ pull-up; eliminates need for external debounce circuitry in most applications. |
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 when VCC1/VCC2 drop or MR is asserted; requires external pull-up for proper logic level translation. |
| 2 - VCC1 | Primary supply voltage input | Monitored rail with 4.63 V reset threshold; powers internal circuitry and serves as reference for RST pull-up. |
| 3 - VCC2 | Secondary supply voltage input | Monitored rail with 3.08 V reset threshold; enables dual-rail supervision without external comparators. |
| 4 - MR | Push-button reset input | Active-low manual reset trigger with internal 50 kΩ pull-up; debounced by design for direct switch connection to VSS. |
| 5 - VSS | Ground reference | Common return path for all internal comparators, logic, and output stage; must be low-impedance for noise immunity. |
| 6 - MRC | Manual reset delay control input | Accepts external capacitor to delay RST assertion after MR activation; enables user-configurable reset timing (≥6 µs). |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-threshold monitoring | Simultaneous supervision of 5 V (VCC1) and 3.3 V (VCC2) rails with factory-trimmed thresholds eliminates external resistor networks. |
| Configurable manual reset delay | MRC pin allows precise timing control of reset assertion after button press using a single external capacitor (e.g., 3.3 µF → ~4 s delay). |
| Low-power operation | 11 µA typical supply current enables integration into always-on subsystems without compromising battery runtime. |
| Open-drain RST with VCC1-referenced pull-up | Supports mixed-voltage systems and avoids contention with bi-directional processor reset pins without additional level-shifting. |
| Guaranteed reset validity down to 0.8 V | Ensures deterministic reset behavior during brownout recovery, critical for fail-safe embedded boot sequences. |
Applications
| Set-Top Box Power Management | Industrial IoT Gateway |
|---|---|
Use Scenario: Monitors main 5 V DC/DC output and auxiliary 3.3 V LDO in cable/satellite STB chassis during cold start and brownout events. IC Role / Device Role / Timing Role: Dual-supply supervisor ensuring synchronized reset of SoC, tuner, and memory subsystems before firmware execution. Use Value: Prevents partial initialization and latch-up by enforcing minimum 13.2 ms reset pulse width after both rails stabilize. | Use Scenario: Supervises host MCU's core voltage (3.3 V) and radio module supply (5 V) in battery-backed wireless gateway deployed in remote locations. IC Role / Device Role / Timing Role: Provides fail-safe reset coordination between processing and connectivity subsystems during intermittent solar/battery charging cycles. Use Value: Enables field-serviceable manual reset via front-panel button with user-defined delay (via MRC capacitor) to avoid accidental reboots. |
| Portable Medical Monitor | Enterprise VoIP Phone |
Use Scenario: Ensures reliable boot sequence in handheld ECG monitor powered by single-cell Li-ion (3.0–4.2 V) with regulated 3.3 V and 1.8 V rails. IC Role / Device Role / Timing Role: Monitors primary regulator output (VCC1) and secondary sensor interface rail (VCC2); asserts RST if either dips below threshold during motion-induced supply sag. Use Value: 11 µA quiescent current extends battery life beyond 12 months in standby mode without compromising reset reliability. | Use Scenario: Controls power-on reset timing and user-initiated reboot in SIP-based desk phone with separate PHY, codec, and PoE interface supplies. IC Role / Device Role / Timing Role: Acts as centralized reset arbiter across three voltage domains (PoE-derived 5 V, 3.3 V logic, 1.2 V core) using open-drain RST bus topology. Use Value: Open-drain output allows safe sharing of reset line with other peripherals and prevents contention with processor's bi-directional reset I/O. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM6778SVWB6F | Identical pinout and function but features push-pull RST output instead of open-drain. | Requires no external pull-up; unsuitable for wired-OR reset buses or bi-directional processor interfaces. | Select when driving a dedicated reset line to a single IC without shared bus requirements. |
| TPS3808G33DBVR | Single-supply supervisor (3.3 V only); no VCC2 monitoring or MRC pin; 300 ms fixed delay. | Lacks dual-rail monitoring and manual reset delay flexibility; lower quiescent current (1.1 µA). | Select only for cost-sensitive, single-rail applications where VCC2 supervision is unnecessary. |
Compared with STM6778SVWB6F and TPS3808G33DBVR, STM6777SVWB6F uniquely combines dual-supply monitoring, open-drain RST compatibility with bi-directional processors, and user-configurable manual reset delay-making it optimal for complex, multi-rail embedded systems requiring flexible reset arbitration.
Availability
STM6777SVWB6F is available at Aetrix Electronics and suitable for set-top box power management, industrial IoT gateways, portable medical monitors, and enterprise VoIP phones requiring stable component supply and long-term industrial-grade availability.
Supply support for STM6777SVWB6F 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, specializing in microcontrollers, power management, analog, and automotive ICs with broad industrial and consumer reach.
The STM67xx family targets ultra-low-voltage, low-quiescent-current supervision for battery-powered and space-constrained embedded systems-emphasizing dual-rail monitoring, push-button reset, and configurable timing without external components.
FAQ
What is the function of the MRC pin on STM6777SVWB6F?
The MRC (Manual Reset Control) pin accepts an external capacitor connected to VSS to introduce a user-defined delay between MR assertion and RST activation. With a 3.3 µF capacitor, the delay reaches approximately 4 seconds; smaller values yield shorter delays, with a minimum of 6 µs when left unconnected. This feature prevents accidental resets and enables timed system recovery sequences.
Can STM6777SVWB6F monitor a 1.8 V supply?
No-STM6777SVWB6F has factory-fixed thresholds: 4.63 V for VCC1 and 3.08 V for VCC2. It cannot monitor 1.8 V directly. However, the RSTIN pin (not present on STM6777) is required for adjustable thresholds; this part lacks RSTIN. For sub-3 V rails, use STM6779/6780 variants with RSTIN and 0.626 V internal reference, paired with an external resistor divider.
Why does STM6777SVWB6F use an open-drain RST output?
The open-drain RST output enables wired-OR configuration with other reset sources and direct interfacing with processors that have bi-directional reset I/O pins. It avoids logic contention when multiple devices drive the same reset line and allows flexible pull-up to any compatible voltage rail (e.g., VCC1), simplifying mixed-voltage system design without level shifters.
Is STM6777SVWB6F suitable for automotive applications?
No-STM6777SVWB6F is rated for industrial temperature range (–40 °C to +85 °C) and is not AEC-Q100 qualified. It lacks automotive-specific qualification, extended temperature support (–40 °C to +125 °C), or enhanced ESD/EMI robustness required for automotive ECUs. For automotive use, consider ST's automotive-qualified supervisors like the STM809 series or TLE4275-based solutions.
STM6777SVWB6F 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:
- 2
- Voltage - Threshold:
- 1.575V, 2.925V
- 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
STM6777SVWB6F FAQ
1.How can I place an order for STM6777SVWB6F through Aetrix?
Please submit a Request for Quotation (RFQ) for STM6777SVWB6F 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 STM6777SVWB6F reliable?
The price and inventory of STM6777SVWB6F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM6777SVWB6F is usually 5 days.
3.What payment methods are accepted for STM6777SVWB6F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM6777SVWB6F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM6777SVWB6F?
STM6777SVWB6F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM6777SVWB6F 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 STM6777SVWB6F?
For technical support, including STM6777SVWB6F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM6777SVWB6F requirements.
6.How does Aetrix verify that STM6777SVWB6F is sourced from the original manufacturer or authorized distributors?
All STM6777SVWB6F 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 STM6777SVWB6F meets industry standards.
7.What is the process for return or replacement of STM6777SVWB6F?
All STM6777SVWB6F units undergo pre-shipment inspection (PSI). If there is an issue with STM6777SVWB6F, 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 STM6777SVWB6F part is unused and in its original packaging.
Return procedure for STM6777SVWB6F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM6777SVWB6F Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
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TPS3828-33DBVR
Texas Instruments
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V6340RSP3B+
EM Microelectronic
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EM6325CXSP5B-2.9+
EM Microelectronic
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MCP120T-300I/TT
Microchip Technology
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MCP130T-315I/TT
Microchip Technology
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MCP120T-475I/TT
Microchip Technology
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MCP111T-300E/TT
Microchip Technology
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MCP120T-315I/TT
Microchip Technology
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MCP809T-315I/TT
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