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STMicroelectronics STM6503VEAADG6F
- Part No.:
- STM6503VEAADG6F
- Manufacturer:
- STMicroelectronics
- Category:
- Supervisors
- Package:
- 8-WFDFN
- Datasheet:
-
STM6503VEAADG6F.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,798
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Product details
Overview
STM6503VEAADG6F from STMicroelectronics is a dual push-button Smart Reset IC with factory-programmable VCC monitoring thresholds (1.575–4.625 V), three-state selectable reset setup delay (tSRC = 2/6/10 s min.), and single active-low open-drain RST output. It operates from 1.0 V to 5.5 V, supports industrial temperature range (–40 °C to +85 °C), and is packaged in TDFN8 (2 mm × 2 mm × 0.75 mm) for space-constrained portable electronics.
For engineers reviewing the STM6503VEAADG6F datasheet, STM6503VEAADG6F pinout, STM6503VEAADG6F application, or STM6503VEAADG6F equivalent, this device delivers deterministic delayed-reset behavior for handheld systems where accidental short-press resets must be suppressed while enabling intentional long-press hard resets - critical for mobile phones, e-books, and navigation devices requiring robust user-initiated recovery.
Technical Context
The STM6503 implements dual active-low Smart Reset inputs (SR0 and SR1) that must both be held low for ≥tSRC to assert RST; tSRC is selected via TSR pin logic state (GND = 2 s, open = 6 s, VCC = 10 s). Its internal voltage monitor compares VCC against a factory-trimmed threshold with hysteresis, triggering RST on undervoltage events independent of button state.
No external capacitor is required for tSRC programming - unlike STM6502/STM6505 - eliminating timing drift from capacitor leakage or PCB contamination. The RST output remains asserted for a fixed timeout period (tREC) after reset conditions clear, ensuring reliable processor initialization across supply transients and button release bounce.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC operating range | 1.0 V to 5.5 V - ensures valid RST output down to 1.0 V, supporting ultra-low-power wake-up sequencing. |
| VCC threshold range | 1.575 V to 4.625 V (typ.) - factory-programmed per unit, eliminates external resistor divider for supply monitoring. |
| tSRC options | 2 s / 6 s / 10 s (min.) - selected by TSR pin DC level, enabling board-level configuration without component change. |
| RST output type | Active-low, open-drain - allows wired-OR with other reset sources and flexible pull-up selection (voltage/rise time). |
| Supply current (ICC) | < 3 µA at 25 °C - enables always-on reset supervision in battery-powered devices with multi-year shelf life. |
| Operating temperature | –40 °C to +85 °C - qualified for industrial-grade portable equipment, including smartphones and GPS units. |
| Package | TDFN8 (DG), 2 mm × 2 mm × 0.75 mm - surface-mount footprint compatible with high-density PCB layouts and automated assembly. |
Pinout & Package
TDFN8 package (2 mm × 2 mm × 0.75 mm, 0.5 mm pitch) with exposed thermal pad (not electrically connected); RoHS compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SR0 | Primary Smart Reset input | Active-low push-button interface; internal 65 kΩ pull-up to VCC - eliminates external resistor for basic implementation. |
| 2 - SR1 | Secondary Smart Reset input | Active-low push-button interface; combines with SR0 to require simultaneous press for tSRC validation - prevents single-button misfire. |
| 3 - TSR | Three-state tSRC select input | DC control pin: GND = 2 s, open = 6 s, VCC = 10 s (all min.); open state requires 0.1 µF decoupling to VSS for noise immunity. |
| 4 - VSS | Ground reference | System ground return for all internal circuitry; must be low-impedance connection to minimize reset timing jitter. |
| 5 - RST | Reset output | Active-low open-drain output; requires external pull-up; drives microprocessor reset pin directly or via level shifter. |
| 6 - VCC | Power supply & monitored rail | Supplies IC and serves as voltage monitor input; 0.1 µF ceramic decoupling to VSS mandatory for stable threshold detection. |
| 7 - NC | No connect | Not bonded die pad; must be connected to VSS for mechanical stability and thermal performance - not left floating. |
| 8 - NC | No connect | Not bonded die pad; must be connected to VSS - ensures consistent solder reflow and package coplanarity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual combined Smart Reset inputs | SR0 and SR1 must both be held low ≥tSRC to trigger RST - enforces intentional two-button or sustained single-button action. |
| Three-state programmable tSRC | TSR pin selects 2/6/10 s minimum delay without external capacitor - simplifies BOM and improves timing accuracy vs. RC-based solutions. |
| Factory-trimmed VCC threshold | 1.575–4.625 V range with ±1.5% typical accuracy - eliminates calibration effort and external resistive divider for supply monitoring. |
| Ultra-low quiescent current | < 3 µA at 25 °C - enables permanent connection to battery-backed rails without measurable drain impact. |
| Industrial temperature operation | –40 °C to +85 °C performance guaranteed - supports deployment in consumer handhelds exposed to ambient extremes. |
Applications
| Smartphone Power Management | e-Book System Recovery |
|---|---|
|
Use Scenario: User holds power button >6 s to force reboot after OS freeze. IC Role / Device Role / Timing Role: STM6503 monitors VCC and validates dual-button press duration before asserting RST - preventing accidental reboots from brief presses. Use Value: Guarantees reset only after confirmed long-press, avoiding data loss during transient UI hangs while maintaining fast response to genuine recovery requests. |
Use Scenario: E-book enters deep sleep; user presses reset combo to restore corrupted firmware state. IC Role / Device Role / Timing Role: Acts as hardware-enforced reset arbiter - SR0/SR1 combination + 10 s tSRC ensures deliberate user action before initiating full system reset. Use Value: Eliminates need for software-based debounce logic, reducing MCU firmware complexity and guaranteeing deterministic recovery under brownout conditions. |
| Portable Navigation Device (PND) | MP3 Player Fault Recovery |
|
Use Scenario: GPS unit locks up during cold boot; user applies extended button press to restart baseband processor. IC Role / Device Role / Timing Role: Provides VCC-supervised reset pulse with tREC timeout - ensures processor receives clean, sustained reset signal even if VCC dips momentarily. Use Value: Prevents partial reset states that cause GPS lock failure or corrupted track memory, improving field reliability in automotive environments. |
Use Scenario: MP3 player freezes during file transfer; user initiates hard reset without removing battery. IC Role / Device Role / Timing Role: Dual SR0/SR1 inputs enable dedicated "reset" and "power" buttons - only simultaneous press triggers RST, preserving power-button-only functions. Use Value: Enables differentiated button functionality on compact PCBs - no additional GPIOs or firmware logic needed to distinguish power-off vs. reset actions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual delayed-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM6502VDAADG6F | tSRC set by external capacitor (0.2–1 µF); no TSR pin; same TDFN8 package and VCC monitoring. | Requires precision low-leakage capacitor and layout care; less immune to PCB contamination than STM6503's logic-based tSRC. | Select when fine-grained tSRC tuning (e.g., 4.5 s) is needed beyond 2/6/10 s steps. |
| MAX6816EUT+T | Single push-button debouncer with 14 ms debounce only; no VCC monitoring or programmable delay; SOT23-6 package. | Lacks dual-input logic, voltage supervision, and user-selectable multi-second delays - suitable only for basic switch cleanup. | Select only for cost-sensitive, non-critical applications where multi-second reset suppression is unnecessary. |
Compared with STM6502VDAADG6F, STM6503VEAADG6F offers superior production robustness via logic-configured tSRC and eliminates capacitor-related yield loss; compared with MAX6816EUT+T, it delivers full system-level reset arbitration with supply monitoring - making it the only viable choice for certified portable electronics requiring intentional long-press recovery.
Availability
STM6503VEAADG6F is available at Aetrix Electronics and suitable for smartphone power management, e-book system recovery, portable navigation device (PND) fault handling, and MP3 player hard reset applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for STM6503VEAADG6F 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, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.
The STM65xx Smart Reset family targets portable electronics requiring hardware-enforced, user-intentional reset behavior - specifically engineered to replace unreliable software-based debounce and prevent accidental system resets in battery-powered handheld devices.
FAQ
What is the function of the TSR pin on STM6503VEAADG6F?
The TSR pin is a three-state DC input that selects the minimum Smart Reset setup delay (tSRC): grounded for 2 s, open for 6 s, or connected to VCC for 10 s. It requires no external clock or timing components, and an open state must be decoupled with a 0.1 µF capacitor to VSS for noise immunity - enabling board-level configuration without firmware changes.
Does STM6503VEAADG6F monitor battery voltage?
No. STM6503VEAADG6F monitors only the VCC supply rail using its factory-programmed threshold. Battery voltage monitoring (VBAT) and low-battery detect (BLD) are exclusive to the STM6505 variant. This part provides no VBAT input or related output functionality - its reset behavior depends solely on VCC level and SR0/SR1 timing.
Can SR0 and SR1 be used independently on STM6503VEAADG6F?
No. SR0 and SR1 operate as a combined input pair - both must be held low for ≥tSRC to assert RST. Unlike STM6504 (which offers independent SR0 and edge-triggered SRE), STM6503 does not support separate reset paths. This design enforces dual-button or sustained single-button action to prevent unintended resets.
What is the maximum recommended PCB trace length between VCC and its 0.1 µF decoupling capacitor?
The 0.1 µF ceramic capacitor must be placed within 2 mm of the VCC pin with direct, low-inductance routing to VSS. Longer traces increase impedance and degrade voltage-monitoring accuracy, especially during fast VCC transients - STMicroelectronics specifies this placement in Section 1.2.1 of the datasheet to ensure stable threshold detection across temperature and load conditions.
STM6503VEAADG6F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- Smart Reset™
- Package/Case:
- 8-WFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Reset Timer
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.575V
- 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:
- 8-TDFN (2x2)
STM6503VEAADG6F FAQ
1.How can I place an order for STM6503VEAADG6F through Aetrix?
Please submit a Request for Quotation (RFQ) for STM6503VEAADG6F 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 STM6503VEAADG6F reliable?
The price and inventory of STM6503VEAADG6F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM6503VEAADG6F is usually 5 days.
3.What payment methods are accepted for STM6503VEAADG6F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM6503VEAADG6F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM6503VEAADG6F?
STM6503VEAADG6F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM6503VEAADG6F 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 STM6503VEAADG6F?
For technical support, including STM6503VEAADG6F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM6503VEAADG6F requirements.
6.How does Aetrix verify that STM6503VEAADG6F is sourced from the original manufacturer or authorized distributors?
All STM6503VEAADG6F 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 STM6503VEAADG6F meets industry standards.
7.What is the process for return or replacement of STM6503VEAADG6F?
All STM6503VEAADG6F units undergo pre-shipment inspection (PSI). If there is an issue with STM6503VEAADG6F, 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 STM6503VEAADG6F part is unused and in its original packaging.
Return procedure for STM6503VEAADG6F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM6503VEAADG6F Tags
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MIC826SYMT-TR
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