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STMicroelectronics STM6519ALARUB6F
- Part No.:
- STM6519ALARUB6F
- Manufacturer:
- STMicroelectronics
- Category:
- Supervisors
- Package:
- 6-UFDFN
- Datasheet:
-
STM6519ALARUB6F.pdf
- Description:
- IC SUPERVISOR SMART RESET 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,257
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Product details
Overview
STM6519ALARUB6F from STMicroelectronics is a single-pin, push-button Smart Reset™ supervisor IC designed for reliable system recovery in portable electronics. It features a factory-programmed 6.0 s Smart Reset delay (tSRC), active-low open-drain reset output (RST), active-low Smart Reset input (SR) without internal pull-up, and operates across 2.0 V to 5.5 V supply voltage. Its ultra-low 1 µA supply current and UDFN6 (1.00 mm × 1.45 mm) package support space-constrained, battery-powered applications requiring delayed reset confirmation.
For engineers reviewing the STM6519ALARUB6F datasheet, STM6519ALARUB6F pinout, STM6519ALARUB6F application, or STM6519ALARUB6F equivalent, this device delivers deterministic push-button–triggered hard reset with no fixed tREC - ideal for mobile systems where user-initiated recovery must distinguish short interrupts from full reboots while maintaining glitch immunity and voltage-domain flexibility.
Technical Context
The STM6519 implements a precision digital timer that asserts RST only after SR remains continuously low for exactly 6.0 s (typ.), with ±20% variation over −40 °C to +85 °C. Its logic detects overvoltage on SR (VCC + 1.4 V) to enter test mode, enabling rapid validation via shortened tSRC-SHORT (tSRC/128 ≈ 47 ms).
No internal reset timeout (tREC) is programmed - RST de-asserts immediately upon SR release, making reset pulse width fully user-controlled. The device supports mixed-voltage domains: SR and RST can operate at different voltages than VCC, provided VCC powers up before or simultaneously with SR to avoid inadvertent test mode entry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage (VCC) | 2.0 V to 5.5 V - enables direct integration into 2.5 V, 3.3 V, and 5 V logic domains without level-shifting. |
| Smart Reset delay (tSRC) | 6.0 s (typ.), ±20% over temperature - ensures deliberate user action before hard reset, eliminating accidental reboots. |
| Supply current (ICC) | 1.0 µA (typ.) at VCC = 3.3 V - extends battery life in always-on portable devices. |
| Input logic threshold (VIH/VIL) | VIL ≤ 0.3 V, VIH ≥ 0.85 VCC - guarantees robust noise margin and compatibility with standard CMOS outputs. |
| Reset output type | Active-low open drain, no internal pull-up - allows external pull-up to any voltage domain, supporting flexible RST signaling. |
| Operating temperature | −40 °C to +85 °C - qualified for consumer and industrial portable equipment environments. |
| ESD protection | HBM: 2 kV - meets IEC 61000-4-2 Level 2 requirements for handheld interface reliability. |
Pinout & Package
STM6519ALARUB6F uses the UDFN6 (1.00 mm × 1.45 mm) package with wettable flanks, ECOPACK®2 compliant (RoHS, halogen-free). Pin 1 is marked by a dot; pins 5 and 6 are not bonded and must be connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST) | Reset output | Active-low open-drain signal - requires external pull-up; asserts only after confirmed 6 s SR press. |
| 2 (VSS) | Ground reference | Primary return path for all internal currents; must be low-impedance and tied to system ground plane. |
| 3 (SR) | Smart Reset input | Active-low push-button interface; no internal pull-up - external pull-up required for default-high operation. |
| 4 (VCC) | Power supply | 2.0–5.5 V input; decoupling with 0.1 µF ceramic capacitor mandatory between VCC and VSS. |
| 5 (NC) | No connect | Not bonded die pad; electrically and thermally connected to VSS per layout best practice. |
| 6 (NC) | No connect | Not bonded die pad; electrically and thermally connected to VSS per layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| Single-pin Smart Reset™ architecture | Reduces PCB footprint and BOM count by consolidating reset initiation and timing into one SR input. |
| Factory-programmed tSRC = 6.0 s | Eliminates external RC timing components and calibration effort - guaranteed delay without trimming. |
| Test mode with overvoltage trigger | VTEST = VCC + 1.4 V enables functional verification without removing the device from circuit. |
| Mixed-voltage domain support | SR and RST can reside in different voltage domains than VCC, enabling flexible system-level reset partitioning. |
| Glitch-immune digital timing core | Immune to EMI-induced false triggers due to internal clocked sampling and extended hold requirement. |
Applications
| Smartphone Power Recovery | e-Reader System Reset |
|---|---|
|
Use Scenario: User holds power button >6 s to force reboot after OS freeze or unresponsive touchscreen. IC Role / Device Role / Timing Role: Smart Reset input (SR) monitors mechanical button; RST drives processor reset pin only after validated 6 s assertion. Use Value: Prevents accidental reboots from brief presses while enabling guaranteed recovery - critical for sealed consumer devices lacking hardware reset switches. |
Use Scenario: E-ink display controller locks during deep-sleep wake-up sequence, requiring full subsystem reset. IC Role / Device Role / Timing Role: SR connected to microcontroller GPIO; RST asserts reset line to SoC and display driver ICs simultaneously. Use Value: Ensures synchronized restart of multi-rail subsystems without software intervention - eliminates need for complex watchdog coordination. |
| Portable GPS Navigation | Bluetooth Headset Firmware Recovery |
|
Use Scenario: GPS module fails to acquire satellites after cold start; user initiates full stack reset via dedicated button. IC Role / Device Role / Timing Role: SR driven by momentary switch; RST resets baseband processor and GNSS receiver ICs in parallel. Use Value: Guarantees clean power-cycle timing across heterogeneous ICs - avoids race conditions caused by staggered software resets. |
Use Scenario: Firmware corruption causes headset to disconnect repeatedly; long-press button triggers full reload of DSP and Bluetooth stack. IC Role / Device Role / Timing Role: SR interfaces with tactile switch; RST forces hardware reset of dual-core audio SoC and RF transceiver. Use Value: Enables field-recoverable firmware failures without requiring PC-based reflashing - improves end-user autonomy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar push-button reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM6519AHARUB6F | tSRC = 4.0 s (typ.), same package and pinout | Shorter delay better suited for mid-tier portable devices where faster recovery is acceptable | Select when 4 s provides sufficient user intent confirmation and reduces perceived recovery latency |
| STM6519APARUB6F | tSRC = 7.5 s (typ.), same package and pinout | Longer delay increases confidence in intentional reset for mission-critical embedded functions | Select when system complexity demands higher assurance against accidental activation in high-interaction UIs |
Compared with STM6519ALARUB6F, the AHARUB6F offers faster response for less sensitive systems, while the APARUB6F adds conservatism for safety-critical or high-noise environments - all share identical electrical interface, package, and domain-flexible operation.
Availability
STM6519ALARUB6F is available at Aetrix Electronics and suitable for smartphone power recovery, e-reader system reset, portable GPS navigation, and Bluetooth headset firmware recovery requiring stable component supply across consumer electronics production cycles.
Supply support for STM6519ALARUB6F 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 sensing solutions for automotive, industrial, and consumer markets.
The STM6519 belongs to ST's Smart Reset™ supervisor family, engineered specifically for portable electronics requiring user-confirmed, glitch-immune, single-button system recovery without external timing components.
FAQ
What is the function of the NC pins (5 and 6) on STM6519ALARUB6F?
Pins 5 and 6 are not internally bonded and serve no electrical function. Per STMicroelectronics' layout guidance, they must be connected to VSS for thermal and mechanical stability. Leaving them floating may compromise solder joint integrity and thermal dissipation in high-density PCB assemblies.
Does STM6519ALARUB6F provide a fixed reset pulse width (tREC)?
No. STM6519ALARUB6F is configured with "R" (push-button controlled) tREC option - meaning RST remains asserted only while SR is held low. Release of SR causes immediate RST de-assertion. There is no factory-programmed tREC value; pulse width is entirely user-determined by button press duration.
Can STM6519ALARUB6F operate with SR and VCC in different voltage domains?
Yes - the device supports mixed-voltage operation. However, VCC must power up before or simultaneously with SR voltage to prevent unintended test mode entry (which occurs if V(SR) > VCC + 1.4 V during startup). This constraint is explicitly addressed in ST's application diagrams for cross-domain use.
Is an external pull-up resistor required on the SR input for STM6519ALARUB6F?
Yes. The "A" in the part number suffix indicates no internal pull-up on SR. An external pull-up resistor (typically 10–100 kΩ to VCC or compatible rail) is mandatory to ensure SR defaults to logic high when the push-button is open, enabling reliable active-low detection of button closure.
STM6519ALARUB6F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- Smart Reset™
- Package/Case:
- 6-UFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Reset Timer
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-UDFN (1.45x1)
STM6519ALARUB6F FAQ
1.How can I place an order for STM6519ALARUB6F through Aetrix?
Please submit a Request for Quotation (RFQ) for STM6519ALARUB6F 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 STM6519ALARUB6F reliable?
The price and inventory of STM6519ALARUB6F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM6519ALARUB6F is usually 5 days.
3.What payment methods are accepted for STM6519ALARUB6F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM6519ALARUB6F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM6519ALARUB6F?
STM6519ALARUB6F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM6519ALARUB6F 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 STM6519ALARUB6F?
For technical support, including STM6519ALARUB6F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM6519ALARUB6F requirements.
6.How does Aetrix verify that STM6519ALARUB6F is sourced from the original manufacturer or authorized distributors?
All STM6519ALARUB6F 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 STM6519ALARUB6F meets industry standards.
7.What is the process for return or replacement of STM6519ALARUB6F?
All STM6519ALARUB6F units undergo pre-shipment inspection (PSI). If there is an issue with STM6519ALARUB6F, 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 STM6519ALARUB6F part is unused and in its original packaging.
Return procedure for STM6519ALARUB6F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM6519ALARUB6F Tags
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MIC826SYMT-TR
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APX803S-31SA-7
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APX803L20-29SA-7
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