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Diodes Incorporated APX803L20-50W5-7
- Part No.:
- APX803L20-50W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
APX803L20-50W5-7.pdf
- Description:
- Reset Generator SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:4,818
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Product details
Overview
APX803L20-50W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.0V threshold detection with ±1.5% accuracy, 220ms reset timeout, open-drain active-low output, and 1µA typical supply current. It monitors VCC in battery-powered systems such as portable medical devices, IoT edge sensors, and low-power microcontroller-based instrumentation.
For engineers reviewing the APX803L20-50W5-7 datasheet, APX803L20-50W5-7 pinout, APX803L20-50W5-7 application, or APX803L20-50W5-7 equivalent, this device delivers verified reset supervision for systems requiring stable brown-out detection, fast 20µs response, and minimal power overhead in space-constrained SOT25 packages.
Technical Context
The APX803L20-50W5-7 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 2.0V threshold, with built-in hysteresis (0.01 × VTH) preventing oscillation during slow-rising/falling supply transitions. Its internal delay timer ensures reset remains asserted for exactly 220ms after VCC recovers above threshold.
Operating from 0.9V to 5.5V supply, it features an open-drain RESET output capable of sinking 20mA at 0.4V max VOL under 3.5mA load, enabling direct interface with µP reset inputs without external pull-up resistors in most designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.0V ±1.5% - precisely holds system reset until VCC exceeds 2.03V (min), ensuring reliable release margin |
| Supply Current | 1.0µA typical - imposes negligible load on coin-cell or energy-harvesting supplies |
| Reset Timeout | 220ms (typ.) - guarantees µP initialization completes before release, per JEDEC JESD78 requirements |
| Response Time | 20µs - detects VCC drop faster than most µP internal clocks, preventing illegal state entry |
| Output Type | Open-drain, active-low - supports wired-OR reset buses and flexible pull-up voltage selection (up to 5.5V) |
| Operating Temp | -40°C to +85°C - validated for industrial-grade embedded control and portable equipment environments |
| Package | SOT25 (5-pin) - provides GND, VCC, RESET, and two NC pins for mechanical stability and layout flexibility |
Pinout & Package
SOT25 package: 5-pin plastic surface-mount package with exposed thermal pad; pin 1 = VCC, pin 2 = RESET, pin 3 = GND, pins 4–5 = No Connection (NC). Designed for automated placement and reflow compatibility with IPC-7351B footprint standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Positive supply input - must be decoupled with ≥100nF ceramic capacitor near pin for noise immunity |
| 2 | RESET | Open-drain active-low output - requires external pull-up resistor to host logic rail (e.g., 10kΩ to 3.3V) |
| 3 | GND | Analog/digital ground reference - connects directly to PCB ground plane for stable threshold reference |
| 4, 5 | NC | No connection - left unconnected; may be used for mechanical anchoring or thermal relief in high-reliability layouts |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.0V threshold | Eliminates external resistor divider, reducing BOM count and layout area while guaranteeing ±1.5% accuracy over temperature |
| 220ms factory-set delay | Ensures deterministic reset hold time without timing capacitor tolerance drift or leakage effects |
| 1µA supply current | Extends battery life in always-on monitoring applications (e.g., >10-year operation on CR2032) |
| Open-drain output | Enables multi-source reset arbitration and level-shifting across mixed-voltage domains (e.g., 1.8V µP + 3.3V peripherals) |
| SOT25 package | Offers improved thermal resistance (θJA = 200°C/W) vs. SOT23 and dedicated NC pins for enhanced board-level reliability |
Applications
| Portable ECG Monitor | Smart Sensor Node |
|---|---|
Use Scenario: Continuous 24/7 cardiac signal acquisition powered by lithium-thionyl chloride primary cell. IC Role / Device Role / Timing Role: Voltage supervisor asserting reset during battery voltage sag below 2.0V to prevent corrupted ADC sampling or flash write errors. Use Value: 1µA quiescent current extends usable battery life beyond 5 years; 220ms timeout ensures full analog front-end stabilization before µP wake-up. |
Use Scenario: LoRaWAN-enabled environmental sensor logging temperature/humidity every 15 minutes using intermittent sleep mode. IC Role / Device Role / Timing Role: Brown-out detector triggering hard reset when supercapacitor voltage drops below 2.0V during RF transmission burst. Use Value: Fast 20µs response prevents MCU lockup during transient supply collapse; open-drain output interfaces cleanly with 3.3V LoRa transceiver reset pin. |
| Industrial PLC I/O Module | Wearable Health Tracker |
Use Scenario: DIN-rail mounted controller with isolated 24V-to-3.3V DC-DC supplying FPGA and analog signal chain. IC Role / Device Role / Timing Role: Primary VCC supervisor verifying 3.3V rail integrity before enabling FPGA configuration and ADC clocking. Use Value: ±1.5% threshold accuracy eliminates need for recalibration across -40°C to +85°C ambient; SOT25 NC pins improve mechanical retention in vibration-prone enclosures. |
Use Scenario: Wrist-worn pulse oximeter operating from 1.5V alkaline button cell with boost converter. IC Role / Device Role / Timing Role: Secondary supervisor monitoring boosted 3.3V domain to prevent firmware crash during battery depletion. Use Value: 2.0V threshold aligns with boost converter dropout voltage; 220ms timeout matches BLE stack initialization sequence duration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX803L20-20SA | SOT23-3 package (3-pin), same 2.0V threshold and 220ms delay, but no NC pins | Limited routing flexibility and higher θJA (200°C/W vs. SOT25's 200°C/W with better pad coupling) | Select when board space is critical and thermal load is low; verify PCB land pattern compatibility |
| TLV803S20DBZR | Texas Instruments part; 2.0V threshold, 200ms delay, 0.9µA supply current, SOT23-3 | Requires external pull-up; lacks NC pins; slightly tighter temp range (-40°C to +125°C) | Choose for TI-design ecosystems or where 125°C operation is required; confirm reset timing alignment with µP spec |
Compared with APX803L20-20SA and TLV803S20DBZR, the APX803L20-50W5-7 offers superior mechanical robustness via SOT25's dual NC pins and identical thermal performance with greater layout margin, making it optimal for high-volume industrial and medical production.
Availability
APX803L20-50W5-7 is available at Aetrix Electronics and suitable for portable medical devices, wireless sensor networks, industrial PLC modules, and wearable health trackers requiring stable component supply with guaranteed long-term continuity.
Supply support for APX803L20-50W5-7 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
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.
The APX803L series targets ultra-low-power supervisory functions in battery-critical and space-constrained systems, emphasizing precision threshold accuracy, nanoscale current consumption, and industry-standard packaging.
FAQ
What is the exact reset threshold voltage and its tolerance for APX803L20-50W5-7?
The APX803L20-50W5-7 has a nominal reset threshold of 2.0V with a guaranteed accuracy of ±1.5% over the full operating temperature range (-40°C to +85°C), meaning the actual trip point falls between 1.97V and 2.03V at +25°C and remains within ±1.5% across temperature per datasheet DS38171 Rev. 3-2.
Does APX803L20-50W5-7 require an external pull-up resistor on the RESET pin?
Yes - the RESET pin is open-drain and active-low, so an external pull-up resistor to the host logic supply (e.g., 3.3V or 5V) is mandatory. Typical values range from 4.7kΩ to 10kΩ; the device itself does not include internal pull-up circuitry.
Can APX803L20-50W5-7 operate with supply voltages below 2.0V?
Yes - it functions down to 0.9V supply (VCC), allowing valid reset assertion even as the monitored rail collapses. However, RESET remains active until VCC rises above 2.0V × 1.02 = 2.04V, ensuring clean release hysteresis per specification.
How is the 220ms reset timeout implemented - is it adjustable or fixed?
The 220ms timeout is factory-trimmed and fixed internally; no external components or configuration pins modify it. This eliminates timing variation due to capacitor tolerance, aging, or temperature drift, delivering consistent reset hold time across all units and conditions.
APX803L20-50W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 5V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 143ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
APX803L20-50W5-7 FAQ
1.How can I place an order for APX803L20-50W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-50W5-7 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 APX803L20-50W5-7 reliable?
The price and inventory of APX803L20-50W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-50W5-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-50W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-50W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-50W5-7?
APX803L20-50W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-50W5-7 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 APX803L20-50W5-7?
For technical support, including APX803L20-50W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-50W5-7 requirements.
6.How does Aetrix verify that APX803L20-50W5-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-50W5-7 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 APX803L20-50W5-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-50W5-7?
All APX803L20-50W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-50W5-7, 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 APX803L20-50W5-7 part is unused and in its original packaging.
Return procedure for APX803L20-50W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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