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STMicroelectronics STM6780YWB6F
- Part No.:
- STM6780YWB6F
- Manufacturer:
- STMicroelectronics
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
STM6780YWB6F.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,471
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Product details
Overview
STM6780YWB6F from STMicroelectronics is a triple ultra-low voltage supervisor IC with push-button reset, dual fixed-threshold supply monitoring (VCC1 and VCC2), and externally adjustable RSTIN input referenced to 0.626 V internal reference. It features active-low push-pull RST output, manual reset (MR) with optional capacitor-delayed activation via MRC pin, and guaranteed reset state down to VCC1/VCC2 ≥ 0.8 V. Used in battery-powered networking equipment for reliable power-on and brownout detection.
For engineers reviewing the STM6780YWB6F datasheet, STM6780YWB6F pinout, STM6780YWB6F application, or STM6780YWB6F equivalent, key selection criteria include its triple-supply monitoring capability, factory-programmed VCC1 threshold (1.58–4.63 V), VCC2 threshold (0.79–3.08 V), 13.2/210/900 ms reset delay options, and SOT23-6 package compatibility with space-constrained embedded designs.
Technical Context
The STM6780 implements independent comparators for VCC1 (primary), VCC2 (secondary), and RSTIN (tertiary via external resistor divider), all feeding into a logic-controlled reset generator with programmable trec delay. Its push-pull RST output is referenced to VCC1 and remains valid over –40 °C to +85 °C.
Manual reset assertion via MR initiates immediate RST low; delayed activation is enabled by connecting a capacitor between MRC and VSS, supporting user-defined delays ≥6 µs (e.g., ~4 s with 3.3 µF). Supply current is typ. 11 µA at 3.6 V, enabling long-life operation in portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | Factory-programmed 1.58 V to 4.63 V - sets primary supply brownout detection point |
| VCC2 Threshold | Factory-programmed 0.79 V to 3.08 V - enables secondary rail monitoring without external components |
| RSTIN Reference | 0.626 V internal - allows precise external voltage monitoring via resistor divider |
| Reset Delay (trec) | 13.2 / 210 / 900 ms (typ) - ensures stable power-up before processor release |
| Supply Current | 11 µA (typ) at VCC1 = VCC2 = 3.6 V - minimizes quiescent drain in battery-critical applications |
| Operating Temp | –40 °C to +85 °C - industrial-grade thermal stability for embedded networking gear |
| RST Output Type | Active-low push-pull - eliminates need for external pull-up and supports direct MCU reset pin drive |
Pinout & Package
SOT23-6 (WB) package: 6-pin surface-mount, 1.3 mm × 2.8 mm footprint, 1.45 mm height, lead pitch 0.95 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RST | Active-low push-pull reset output | Drives low when any monitored supply drops below threshold or MR is asserted; remains low for trec after recovery |
| 2: VCC1 | Primary supply voltage input | Power source and reference for RST output; enables reset assertion down to 0.8 V |
| 3: MRC | Manual reset delay capacitor input | Connects to VSS via capacitor to delay MR-triggered reset onset (≥6 µs); not used if left open |
| 4: MR | Push-button reset input | Active-low input with internal 50 kΩ pull-up; debounced internally - no external RC needed |
| 5: RSTIN | Adjustable reset comparator input | High-impedance node comparing external voltage to 0.626 V reference; enables third-rail monitoring |
| 6: VSS | Ground reference | Common return for all internal circuitry and external capacitor on MRC |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply supervision | Simultaneous monitoring of VCC1, VCC2, and RSTIN enables full-system power integrity verification |
| Capacitor-programmable manual reset delay | MRC pin supports user-defined reset hold time (e.g., 4 s with 3.3 µF), preventing spurious resets during button press |
| Guaranteed reset state at low VCC | RST logic level is valid even when VCC1 or VCC2 ≥ 0.8 V - critical for graceful shutdown in brownout conditions |
| Ultra-low quiescent current | 11 µA typical supply draw extends battery life in portable and remote IoT nodes |
| Industrial temperature range | –40 °C to +85 °C operation ensures reliability in uncontrolled environments like DSLAMs and STBs |
Applications
| Set-Top Box Power Management | Portable Network Router |
|---|---|
|
Use Scenario: Monitors main 3.3 V CPU rail, 1.2 V core rail, and 5 V USB interface rail during cold start and brownout events. IC Role / Device Role / Timing Role: Triple-supply supervisor asserting synchronized reset to SoC and peripheral controllers upon any rail failure. Use Value: Prevents partial initialization and firmware corruption by holding reset until all rails stabilize per trec timing. |
Use Scenario: Ensures clean boot sequence in battery-backed wireless router after power interruption or deep-sleep wake-up. IC Role / Device Role / Timing Role: Primary supervisor for 3.6 V Li-ion system rail and 1.8 V RF subsystem, with RSTIN monitoring backup LDO. Use Value: 11 µA quiescent current preserves battery charge; MRC-enabled delayed MR prevents accidental reset during field maintenance. |
| Industrial Ethernet Switch | DSL Access Multiplexer (DSLAM) |
|
Use Scenario: Supervises 12 V PoE input, 3.3 V management controller rail, and 2.5 V PHY interface voltage under wide-temperature operation. IC Role / Device Role / Timing Role: Fault-tolerant reset generator interfacing directly to microcontroller's bi-directional reset pin via series 4.7 kΩ resistor. Use Value: Push-pull RST eliminates external pull-up component; –40 °C to +85 °C rating ensures uptime in outdoor cabinets. |
Use Scenario: Validates 5 V line card supply, 3.3 V control logic rail, and 1.2 V DSP core voltage during hot-swap insertion and thermal cycling. IC Role / Device Role / Timing Role: Triple-rail monitor with factory-trimmed thresholds matching legacy board design requirements. Use Value: Factory-programmed VCC1 = 4.63 V and VCC2 = 3.08 V eliminate calibration effort; SOT23-6 footprint matches existing PCB layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-supply supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Single-supply supervisor (VDD only); no VCC2 or RSTIN inputs; fixed 3.3 V threshold | Lacks dual fixed-threshold and adjustable third-rail monitoring; suitable only for single-rail systems | Select only if board uses one critical supply and space permits larger SOT23-6 footprint with identical pinout constraints |
| MAX6816EUT+T | Single-channel push-button debouncer (no voltage monitoring); requires external comparators for supply supervision | No built-in voltage thresholds or reset delay logic - adds BOM cost and layout complexity | Choose only when manual reset debouncing is sole requirement and voltage monitoring is handled separately |
Compared with TPS3808G33DBVR and MAX6816EUT+T, STM6780YWB6F uniquely integrates triple-rail monitoring, capacitor-delayed MR, and push-pull RST in a single SOT23-6 device - reducing component count and validation effort in multi-rail embedded systems.
Availability
STM6780YWB6F is available at Aetrix Electronics and suitable for set-top boxes, portable network routers, and industrial Ethernet switches requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for STM6780YWB6F 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, delivering high-performance analog, microcontroller, and power management solutions since 1987.
The STM67xx family was designed specifically for ultra-low-power, multi-rail supervision in consumer and industrial embedded systems where space, current budget, and supply robustness are critical constraints.
FAQ
What is the function of the MRC pin on STM6780YWB6F?
The MRC (Manual Reset Capacitor) pin enables user-defined delay of the manual reset signal. When a capacitor is connected between MRC and VSS, the RST assertion triggered by MR is delayed by a time proportional to capacitance (e.g., ~4 s with 3.3 µF). Leaving MRC open disables delay, resulting in immediate RST response to MR assertion.
Can STM6780YWB6F monitor a 1.0 V supply rail?
Yes - the RSTIN pin accepts an externally divided voltage referenced to the internal 0.626 V comparator. To monitor a 1.0 V rail, use a resistor divider (e.g., R1 = 626 kΩ, R2 = 1 MΩ) to scale 1.0 V down to 0.626 V at RSTIN. The device guarantees accurate comparison across –40 °C to +85 °C.
Is STM6780YWB6F compatible with processors having bidirectional reset pins?
Yes, but requires a 4.7 kΩ series resistor between RST and the processor's reset I/O to prevent logic contention. Unlike open-drain supervisors, STM6780's push-pull RST actively drives low and high states - the resistor isolates bidirectional behavior while preserving reset timing integrity.
What is the minimum operating voltage for reliable reset assertion?
STM6780YWB6F guarantees correct RST logic state when VCC1 or VCC2 ≥ 0.8 V. Below this, internal comparators and logic may become indeterminate. This specification ensures fail-safe reset assertion during brownout conditions common in battery-powered systems approaching end-of-discharge.
STM6780YWB6F 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:
- 2.188V, Adj
- Output:
- Push-Pull, Totem Pole
- 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
STM6780YWB6F FAQ
1.How can I place an order for STM6780YWB6F through Aetrix?
Please submit a Request for Quotation (RFQ) for STM6780YWB6F 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 STM6780YWB6F reliable?
The price and inventory of STM6780YWB6F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM6780YWB6F is usually 5 days.
3.What payment methods are accepted for STM6780YWB6F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM6780YWB6F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM6780YWB6F?
STM6780YWB6F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM6780YWB6F 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 STM6780YWB6F?
For technical support, including STM6780YWB6F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM6780YWB6F requirements.
6.How does Aetrix verify that STM6780YWB6F is sourced from the original manufacturer or authorized distributors?
All STM6780YWB6F 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 STM6780YWB6F meets industry standards.
7.What is the process for return or replacement of STM6780YWB6F?
All STM6780YWB6F units undergo pre-shipment inspection (PSI). If there is an issue with STM6780YWB6F, 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 STM6780YWB6F part is unused and in its original packaging.
Return procedure for STM6780YWB6F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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MIC826SYMT-TR
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