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Diodes Incorporated APX803L20-49W5-7
- Part No.:
- APX803L20-49W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
APX803L20-49W5-7.pdf
- Description:
- Reset Generator SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:1,484
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Product details
Overview
APX803L20-49W5-7 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, and 1µA typical supply current in a 3-pin SOT25 package. It delivers active-low open-drain reset signaling for power monitoring in battery-powered IoT sensors and portable medical devices.
For engineers reviewing the APX803L20-49W5-7 datasheet, APX803L20-49W5-7 pinout, APX803L20-49W5-7 application, or APX803L20-49W5-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, low-quiescent-current operation in sleep-mode systems, and compatibility with 1.8V–5.5V VCC rails.
Technical Context
The APX803L20-49W5-7 implements a precision bandgap-based voltage reference with built-in hysteresis (0.01×VTH) to prevent reset chatter during brown-out recovery. Its internal fixed 2.0V detection threshold is laser-trimmed at wafer level for ±1.5% initial accuracy across -40°C to +85°C.
This device uses an open-drain output stage capable of sinking 20mA, with reset assertion triggered when VCC drops below 2.0V and released only after VCC exceeds 2.016V (1.5% hysteresis), ensuring reliable de-bounced system restarts without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.0V ±1.5% - ensures stable power-on reset initiation at defined rail voltage |
| Supply Current | 1.0µA typical - enables multi-year battery life in always-on monitoring nodes |
| Reset Timeout | 220ms (typ.) - provides sufficient hold time for microcontroller initialization sequences |
| Output Type | Active-low open-drain - allows wired-OR reset bus configuration with pull-up to any logic rail |
| Operating Voltage | 0.9V to 5.5V - supports direct connection to 1.8V, 3.3V, and 5V supply domains |
| Response Time | 20µs max - guarantees fast fault detection before system state corruption occurs |
Pinout & Package
SOT25 (3-pin) package with standard footprint compatible with automated PCB assembly; moisture sensitivity level (MSL) 1, RoHS-compliant, halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground return path for internal comparator and output stage |
| 2 | RESET | Open-drain output; pulled low during reset, high-impedance otherwise |
| 3 | VCC | Power input; supplies internal reference, comparator, and output driver |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated reference, comparator, and delay circuit eliminate BOM cost and layout area |
| Built-in 220ms reset timeout | Factory-programmed delay ensures consistent reset pulse width across units and temperatures |
| High threshold accuracy | ±1.5% over -40°C to +85°C enables reliable operation without calibration |
| Ultra-low supply current | 1.0µA typ. reduces standby power impact in energy-harvesting and coin-cell applications |
| Wide VCC range | 0.9V–5.5V operation supports legacy 5V systems and modern ultra-low-voltage MCUs |
Applications
| Smart Wearables | Industrial Sensor Nodes |
|---|---|
Use Scenario: Continuous heart-rate monitoring using BLE SoC in wrist-worn device with coin-cell battery. IC Role / Device Role / Timing Role: Voltage supervisor asserting reset if battery sags below 2.0V during RF transmission burst. Use Value: Prevents firmware crash by guaranteeing clean MCU restart before brown-out data corruption occurs. |
Use Scenario: Wireless vibration sensor deployed in factory machinery with 10-year battery target. IC Role / Device Role / Timing Role: Monitors 3.3V LDO output powering ultra-low-power MCU and MEMS accelerometer. Use Value: 220ms reset hold time aligns with MCU wake-from-sleep initialization sequence, avoiding spurious reboots. |
| Point-of-Care Diagnostics | Asset Tracking Tags |
Use Scenario: Portable blood glucose meter requiring FDA-grade reliability and single-button operation. IC Role / Device Role / Timing Role: Supervises main 3.0V supply to ensure ADC reference stability before test strip measurement. Use Value: ±1.5% threshold accuracy eliminates need for system-level recalibration across temperature and unit variance. |
Use Scenario: GPS-enabled logistics tag operating on primary lithium thionyl chloride cell. IC Role / Device Role / Timing Role: Detects end-of-life voltage drop to trigger last-report transmission before shutdown. Use Value: 1µA quiescent current extends usable shelf life beyond 12 years under typical storage conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G22DBVR | 2.2V threshold, 350ms default delay, 1.6µA supply current, SOT23-6 package | Higher threshold and longer delay; requires external capacitor for delay adjustment | Select when 2.2V detection and programmable delay are needed; verify PCB pad compatibility with 6-pin footprint |
| MAX809SEUR+T | 2.93V threshold, 140ms delay, 12µA supply current, SOT23-3 package | Higher threshold, higher ICC, no factory-set delay options | Choose only if 2.93V reset point matches system rail; avoid in sub-10µA battery-critical designs |
Compared with TPS3808G22DBVR and MAX809SEUR+T, the APX803L20-49W5-7 offers tighter threshold accuracy (±1.5% vs ±2.5%), lower supply current (1µA vs ≥12µA), and factory-configured 220ms delay-making it optimal for compact, long-life, precision-supervised embedded systems.
Availability
APX803L20-49W5-7 is available at Aetrix Electronics and suitable for smart wearables, industrial sensor nodes, point-of-care diagnostics, and asset tracking tags requiring stable component supply across multi-year production cycles.
Supply support for APX803L20-49W5-7 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, with design centers in Asia, Europe, and the U.S., and manufacturing in IATF 16949-certified facilities.
The APX803L series belongs to Diodes' precision power management portfolio, engineered specifically for ultra-low-power supervisory functions in battery-constrained and space-sensitive applications.
FAQ
What is the exact reset threshold voltage for APX803L20-49W5-7?
The APX803L20-49W5-7 has a factory-trimmed nominal reset threshold of 2.0V with guaranteed accuracy of ±1.5% over -40°C to +85°C ambient temperature, corresponding to a minimum release voltage of 2.016V due to built-in hysteresis.
Does APX803L20-49W5-7 require an external pull-up resistor on the RESET pin?
Yes - the RESET pin is open-drain and must be externally pulled up to the monitored supply rail or logic voltage (e.g., 3.3V) via a resistor typically between 10kΩ and 100kΩ to ensure proper logic-high state during normal operation.
Can APX803L20-49W5-7 operate from a 1.8V supply?
Yes - the device operates across 0.9V to 5.5V VCC, and its 2.0V threshold remains valid even when powered from 1.8V, though functional reset assertion requires VCC to rise above 2.0V; thus, it is not recommended for direct supervision of 1.8V rails.
Is the 220ms reset timeout affected by temperature or supply voltage variation?
No - the 220ms timeout is internally generated and specified as 143ms (min) to 297ms (max) across -40°C to +85°C and full VCC range; this variation is fully characterized and does not require derating in system timing budgets.
APX803L20-49W5-7 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:
- 4.9V
- 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
APX803L20-49W5-7 FAQ
1.How can I place an order for APX803L20-49W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-49W5-7 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 APX803L20-49W5-7 reliable?
The price and inventory of APX803L20-49W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-49W5-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-49W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-49W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-49W5-7?
APX803L20-49W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-49W5-7 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 APX803L20-49W5-7?
For technical support, including APX803L20-49W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-49W5-7 requirements.
6.How does Aetrix verify that APX803L20-49W5-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-49W5-7 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 APX803L20-49W5-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-49W5-7?
All APX803L20-49W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-49W5-7, 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 APX803L20-49W5-7 part is unused and in its original packaging.
Return procedure for APX803L20-49W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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