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Diodes Incorporated APX803L-19W5-7
- Part No.:
- APX803L-19W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
APX803L-19W5-7.pdf
- Description:
- RESET GENERATOR SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:4,631
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Product details
Overview
APX803L-19W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply levels in battery-powered and embedded digital systems. It features a fixed 1.9V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and 220ms built-in reset timeout - enabling reliable power-on reset and brownout protection in portable electronics.
For engineers reviewing the APX803L-19W5-7 datasheet, APX803L-19W5-7 pinout, APX803L-19W5-7 application, or APX803L-19W5-7 equivalent, this device delivers precise low-voltage supervision with minimal quiescent current, making it ideal for space-constrained, energy-sensitive designs requiring deterministic reset behavior under varying supply conditions.
Technical Context
The APX803L-19W5-7 integrates a precision bandgap reference and comparator to detect when VCC falls below 1.9V, triggering an active-low open-drain RESET signal that remains asserted until VCC exceeds 1.9V + hysteresis (1% of VTH). Its internal 220ms delay ensures stable system initialization after power recovery.
Operating from 0.9V to 5.5V supply, it consumes only 1µA (typ.) at 25°C and maintains ±1.5% threshold accuracy across -40°C to +85°C ambient, with temperature coefficient of 50 ppm/°C - supporting robust operation in consumer and industrial environments without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 1.9V ±1.5% - precisely initiates reset when main supply drops below critical level for 1.8V–2.0V logic domains |
| Supply Current | 1.0µA (typ.) - enables multi-year battery life in always-on monitoring applications |
| Reset Timeout | 220ms - guarantees sufficient hold time for microprocessor initialization sequences |
| Output Type | Open-drain, active-low - supports wired-OR reset buses and flexible pull-up voltage selection |
| Response Time | 20µs - detects rapid VCC dips before system state corruption occurs |
| Operating Temp | -40°C to +85°C - qualified for extended industrial ambient conditions |
| Package | SOT25 (3-pin) - surface-mount footprint compatible with automated assembly and high-density PCB layouts |
Pinout & Package
SOT25 package: 3-pin, small-outline transistor outline with gull-wing leads; RoHS-compliant, lead-free, halogen-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal circuitry and RESET output sink path |
| 2 | RESET | Open-drain active-low reset output; requires external pull-up to define logic-high level |
| 3 | VCC | Power supply input; monitored voltage source for threshold detection |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 1.9V threshold | Eliminates need for external resistor divider; reduces BOM count and layout area |
| 220ms internal delay | Ensures clean, glitch-free reset assertion without external timing capacitor |
| 1µA supply current | Minimizes load on coin-cell or energy-harvesting supplies in ultra-low-power nodes |
| ±1.5% threshold accuracy | Supports tight supply margining in 1.8V I/O systems without calibration overhead |
| Open-drain output | Enables shared reset bus across multiple ICs and compatibility with mixed-voltage domains |
Applications
| Smartphone Power Sequencing | IoT Sensor Node Supervision |
|---|---|
Use Scenario: Monitors VBAT during cold start and deep-sleep wake-up cycles in ARM Cortex-M based wearables. IC Role / Device Role / Timing Role: Voltage supervisor providing POR and brownout reset with 220ms hold time. Use Value: Prevents firmware lockup by ensuring CPU exits reset only after regulated 1.8V rail stabilizes. |
Use Scenario: Embedded in battery-powered environmental sensors transmitting via BLE every 5 minutes. IC Role / Device Role / Timing Role: Low-current supervisor detecting 1.9V cutoff to trigger graceful shutdown before data loss. Use Value: Extends usable battery life by 12+ months via sub-µA quiescent draw during sleep. |
| Industrial PLC I/O Module | Medical Portable Monitor |
Use Scenario: Secures FPGA configuration integrity during 24V-to-3.3V DC-DC startup transients. IC Role / Device Role / Timing Role: Reset generator asserting active-low signal until 3.3V rail settles within ±3%. Use Value: Eliminates FPGA bitstream corruption risk caused by premature clock enable. |
Use Scenario: Ensures reliable boot of ECG front-end SoC powered by Li-ion cell (3.0–4.2V range). IC Role / Device Role / Timing Role: Supervises 1.9V auxiliary rail feeding real-time clock and SRAM retention. Use Value: Guarantees data persistence across power interruptions with deterministic reset timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G19DBVR | 1.9V threshold, 350ms default delay, 1.1µA IQ, SOT23-6 package | Requires external capacitor for delay adjustment; larger footprint | Preferred where programmable delay or higher sink current (100mA) is required |
| MAX809SEUR+T | 1.9V threshold, 140ms delay, 10µA IQ, SOT23-3 package | Higher supply current limits use in coin-cell applications | Selected when cost sensitivity outweighs ultra-low-power requirements |
Compared with TPS3808G19DBVR and MAX809SEUR+T, the APX803L-19W5-7 offers the lowest quiescent current (1µA) in a compact SOT25 package with factory-trimmed 220ms delay - optimizing for battery longevity and board space in high-volume portable designs.
Availability
APX803L-19W5-7 is available at Aetrix Electronics and suitable for smartphone power sequencing, IoT sensor node supervision, industrial PLC I/O modules, and medical portable monitors requiring stable component supply with guaranteed long-term availability.
Supply support for APX803L-19W5-7 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 devices, with design centers across Asia, Europe, and the US.
The APX803L series belongs to Diodes' precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy power monitoring in battery-operated and space-constrained embedded systems.
FAQ
What is the exact detection threshold voltage of APX803L-19W5-7?
The APX803L-19W5-7 has a factory-trimmed detection threshold of 1.9V with ±1.5% accuracy over -40°C to +85°C ambient temperature. This value is fixed internally and does not require external components or calibration.
Does APX803L-19W5-7 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 (typically 10kΩ to VCC or another logic rail) is required to establish a valid high-level voltage when the output is inactive.
Can APX803L-19W5-7 operate from a 1.2V supply?
No - the minimum operating supply voltage is 0.9V, but the device monitors VCC against its 1.9V threshold; operation below 1.9V will assert RESET. For reliable detection, VCC must reach at least 1.9V + hysteresis (≈1.92V) to release reset.
Is APX803L-19W5-7 qualified for automotive applications?
No - the APX803L-19W5-7 is not AEC-Q100 qualified. Diodes Incorporated offers automotive-grade alternatives (e.g., APX803L variants with AEC-Q100 qualification) upon request, manufactured in IATF 16949 certified facilities.
APX803L-19W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.9V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 0ms Typical
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
APX803L-19W5-7 FAQ
1.How can I place an order for APX803L-19W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L-19W5-7 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 APX803L-19W5-7 reliable?
The price and inventory of APX803L-19W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L-19W5-7 is usually 5 days.
3.What payment methods are accepted for APX803L-19W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L-19W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L-19W5-7?
APX803L-19W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L-19W5-7 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 APX803L-19W5-7?
For technical support, including APX803L-19W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L-19W5-7 requirements.
6.How does Aetrix verify that APX803L-19W5-7 is sourced from the original manufacturer or authorized distributors?
All APX803L-19W5-7 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 APX803L-19W5-7 meets industry standards.
7.What is the process for return or replacement of APX803L-19W5-7?
All APX803L-19W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L-19W5-7, 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 APX803L-19W5-7 part is unused and in its original packaging.
Return procedure for APX803L-19W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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