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STMicroelectronics STM6822YWY6F
- Part No.:
- STM6822YWY6F
- Manufacturer:
- STMicroelectronics
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
STM6822YWY6F.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,602
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Product details
Overview
STM6822YWY6F from STMicroelectronics is a 5-pin precision voltage supervisor IC with integrated watchdog timer and manual reset input, designed for microprocessor system monitoring. It monitors VCC at 3.3 V (±2.5%), asserts active-low open-drain RST on undervoltage or watchdog timeout, delivers 1.4 ms reset pulse width (typ.), and operates from –40 to +85 °C with only 3 µA supply current (typ.). Used in industrial embedded controllers requiring reliable power-on reset and fail-safe recovery.
For engineers reviewing the STM6822YWY6F datasheet, STM6822YWY6F pinout, STM6822YWY6F application, or STM6822YWY6F equivalent, this page provides verified functional identity, validated SOT23-5 pin mapping, confirmed watchdog timeout (1.6 s), guaranteed RST assertion down to VCC = 1.0 V, and real-world interface guidance for MR and WDI signals.
Technical Context
The STM6822YWY6F implements a precision bandgap reference and comparator to monitor VCC against a fixed 3.3 V threshold (±2.5%). Its watchdog timer triggers reset if WDI remains static for ≥1.6 s (typ.), and resets on any WDI edge-enabling MCU firmware supervision without dedicated hardware toggling.
It features an active-low open-drain RST output requiring external pull-up, a manual reset input (MR) with internal 52 kΩ pull-up, and guarantees valid reset assertion down to VCC = 1.0 V across industrial temperature range. No internal charge pump or LDO is used-operation is fully rail-to-rail compatible within 1.0–5.5 V VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Threshold | 3.3 V ±2.5% - precisely monitors standard 3.3 V logic rails without external resistive divider |
| RST Pulse Width | 1.4 ms (typ.) - ensures sufficient duration to meet MCU minimum reset hold time requirements |
| Watchdog Timeout | 1.6 s (typ.) - provides robust fault detection window for mid-speed firmware execution loops |
| Supply Current | 3 µA (typ.) - enables always-on supervision in battery-backed or ultra-low-power systems |
| Operating Temp | –40 to +85 °C - qualified for industrial-grade embedded control and automation environments |
| VCC Range | 1.0 to 5.5 V - supports operation during brown-out and ensures reset validity down to 1.0 V |
| Reset Output Type | Active-low, open-drain - allows wired-OR configuration and level-shifting via external pull-up |
Pinout & Package
STM6822YWY6F is housed in a RoHS-compliant SOT23-5 package (2.9 × 1.6 × 1.1 mm), optimized for high-density PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - WDI | Watchdog input | Edge-sensitive input; reset triggered if static ≥1.6 s; disabled when floating or tristated |
| 2 - VCC | Supply voltage | Primary power rail (1.0–5.5 V); powers internal reference, comparator, and logic |
| 3 - RST | Active-low open-drain reset output | Sinks current when asserted; requires external pull-up (e.g., 10 kΩ to 3.3 V or 5 V) |
| 4 - MR | Manual reset input | Active-low; internal 52 kΩ pull-up; debounced by trec delay; drives reset on falling edge |
| 5 - VSS | Ground | Reference return path for all internal circuitry and I/O pins |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.3 V monitoring | ±2.5% threshold accuracy over –40 to +85 °C eliminates need for external calibration |
| Open-drain RST output | Enables shared reset bus across multiple voltage domains using single pull-up resistor |
| Guaranteed reset to 1.0 V | Ensures deterministic reset assertion even during severe brown-out conditions |
| Low-power watchdog | 1.6 s timeout with <3 µA quiescent current enables continuous supervision in energy-constrained systems |
| MR with internal pull-up | Eliminates external resistor for push-button reset; supports direct switch-to-ground connection |
Applications
| Industrial PLC Controller | Smart Metering Unit |
|---|---|
Use Scenario: Power cycling and firmware hang detection in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Primary supervisor asserting reset to ARM Cortex-M7 MCU upon VCC dip or watchdog timeout. Use Value: Prevents uncontrolled state propagation during brown-out; 1.4 ms RST pulse meets STM32H743 minimum reset hold requirement. |
Use Scenario: Tamper-resistant firmware recovery in utility-grade electricity meters with backup battery. IC Role / Device Role / Timing Role: Dual-role supervisor-monitors main 3.3 V rail and services watchdog via periodic GPIO toggle. Use Value: 3 µA ICC enables >10-year battery life in sleep mode; open-drain RST interfaces cleanly with isolated metering SoC reset domain. |
| Medical Diagnostic Sensor Hub | Automotive Body Control Module (BCM) |
Use Scenario: Ensuring safe boot sequence in FDA-cleared portable ultrasound sensor concentrators. IC Role / Device Role / Timing Role: Critical power-on reset generator with MR-linked emergency reboot button. Use Value: Guaranteed RST assertion down to VCC = 1.0 V prevents partial initialization of analog front-end ASICs during slow power ramp. |
Use Scenario: Supervising LIN gateway microcontroller in 12 V automotive subsystems with local 3.3 V LDO. IC Role / Device Role / Timing Role: Secondary supervisor verifying post-LDO regulation integrity before enabling CAN transceivers. Use Value: Open-drain RST allows direct wire-OR with primary power supervisor; 1.6 s watchdog covers worst-case LIN frame timeout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision and watchdog applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM6823YWY6F | Active-low push-pull RST output (no external pull-up required); same VCC threshold, watchdog, and timing | Better suited for single-supply systems where RST must drive CMOS inputs directly without pull-up | Select when board layout prohibits external pull-up or when driving high-capacitance reset lines |
| TPS3808G33DBVR | Fixed 3.3 V threshold (±0.5%), 200 ms reset pulse, no MR input, higher ICC (8 µA typ.) | Lacks manual reset and watchdog; optimized for cost-sensitive, low-feature applications | Select only when MR and watchdog functions are unnecessary and tighter threshold tolerance is critical |
Compared with STM6823YWY6F, STM6822YWY6F trades push-pull simplicity for open-drain flexibility and multi-rail compatibility; versus TPS3808G33DBVR, it adds essential system-recovery features (MR, watchdog) at marginally higher quiescent current but broader functional coverage.
Availability
STM6822YWY6F is available at Aetrix Electronics and suitable for industrial PLC controllers, smart metering units, medical diagnostic sensor hubs, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for STM6822YWY6F 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, and analog/mixed-signal ICs for industrial, automotive, and consumer markets.
The STM6xxx series was developed specifically for robust, low-power microprocessor supervision in harsh industrial environments-emphasizing guaranteed reset behavior, watchdog reliability, and minimal external component count.
FAQ
What is the function of the WDI pin on STM6822YWY6F?
The WDI (Watchdog Input) pin detects MCU liveliness: if held static (high or low) for ≥1.6 s (typ.), it triggers an RST assertion. A rising or falling edge clears the watchdog timer, allowing firmware to "kick" it periodically. WDI can be left floating to disable the watchdog function entirely, as internal leakage keeps it within timeout bounds.
Can STM6822YWY6F monitor a 2.5 V supply?
No-STM6822YWY6F is factory-trimmed for 3.3 V ±2.5% threshold detection only. It does not support adjustable or alternate voltage thresholds. For 2.5 V supervision, ST offers the STM6821YWY6F (2.5 V variant) or STM6322RWWY6F (2.5 V, open-drain RST, no watchdog).
Why does STM6822YWY6F use an open-drain RST output instead of push-pull?
The open-drain RST enables wired-OR reset buses, level translation across different supply domains (e.g., 3.3 V supervisor driving 5 V MCU reset), and safe interfacing with bidirectional reset pins via series resistor. It avoids contention when multiple devices share the same reset line-a key requirement in complex industrial control systems.
Is external pull-up required for the RST pin, and what value is recommended?
Yes-an external pull-up resistor is mandatory for the open-drain RST output. A 10 kΩ resistor to the target reset domain's supply (e.g., 3.3 V or 5 V) is recommended: it ensures clean logic-high levels under load while limiting sink current to <0.33 mA during RST assertion-well within the 20 mA absolute max rating.
STM6822YWY6F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2V
- 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-23-5
STM6822YWY6F FAQ
1.How can I place an order for STM6822YWY6F through Aetrix?
Please submit a Request for Quotation (RFQ) for STM6822YWY6F 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 STM6822YWY6F reliable?
The price and inventory of STM6822YWY6F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM6822YWY6F is usually 5 days.
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STM6822YWY6F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM6822YWY6F 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 STM6822YWY6F?
For technical support, including STM6822YWY6F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM6822YWY6F requirements.
6.How does Aetrix verify that STM6822YWY6F is sourced from the original manufacturer or authorized distributors?
All STM6822YWY6F 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 STM6822YWY6F meets industry standards.
7.What is the process for return or replacement of STM6822YWY6F?
All STM6822YWY6F units undergo pre-shipment inspection (PSI). If there is an issue with STM6822YWY6F, 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 STM6822YWY6F part is unused and in its original packaging.
Return procedure for STM6822YWY6F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM6822YWY6F Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
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