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Diodes Incorporated APX803L20-33W5-7
- Part No.:
- APX803L20-33W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
APX803L20-33W5-7.pdf
- Description:
- Reset Generator SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:4,642
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Product details
Overview
APX803L20-33W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 3.3V threshold detection with ±1.5% accuracy, 220ms reset timeout, and 1µA typical supply current in a 5-pin SOT25 package. It delivers active-low open-drain reset signaling for power monitoring in battery-powered embedded systems.
For engineers reviewing the APX803L20-33W5-7 datasheet, APX803L20-33W5-7 pinout, APX803L20-33W5-7 application, or APX803L20-33W5-7 equivalent, this device supports critical low-power reset supervision where tight voltage tolerance, fast 20µs response, and zero external component requirements are essential.
Technical Context
The APX803L20-33W5-7 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 3.3V threshold (±1.5% at +25°C), 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, with VOL ≤ 0.4V at 3.5mA sink load. The device maintains stable performance across –40°C to +85°C ambient, with threshold drift of only 50ppm/°C over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 3.3V ±1.5% at +25°C - ensures reliable µP reset initiation within strict supply rail tolerances |
| Supply Current | 1.0µA typical - enables multi-year operation in coin-cell–powered IoT sensors without burdening system efficiency |
| Reset Timeout | 220ms (min–max: 143–297ms) - guarantees sufficient hold time for full µP initialization before release |
| Response Time | ≤20µs - detects rapid VCC collapse faster than most µP brown-out detectors |
| Output Type | Open-drain, active-low - allows wired-OR reset bus configuration and flexible pull-up voltage selection |
| Operating Voltage | 0.9V to 5.5V - supports supervision of 1.2V, 1.8V, 2.5V, 3.3V, and 5.0V rails with single device family |
| Temperature Range | –40°C to +85°C - qualified for industrial and extended-temperature embedded applications |
Pinout & Package
SOT25 (5-pin) package with 1.6mm × 2.9mm footprint, 0.95mm height, and standard 0.95mm pitch; RoHS-compliant, halogen-free, lead-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal circuitry and reset comparator |
| 2 | RESET | Active-low open-drain reset output; requires external pull-up to host VCC or logic rail |
| 3 | VCC | Power supply input; monitored rail voltage source for threshold comparison |
| 4 | NC | No connection - internally unconnected; must be left floating or tied to GND per layout best practice |
| 5 | NC | No connection - internally unconnected; must be left floating or tied to GND per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.3V threshold | Eliminates external resistor divider, reducing BOM count and PCB area while guaranteeing factory-trimmed accuracy |
| 220ms reset timeout | Matches typical µP boot sequence timing, avoiding premature release before firmware initialization completes |
| 1µA supply current | Enables direct integration into always-on subsystems (e.g., RTC backup domain) without measurable battery drain |
| Open-drain RESET output | Supports multi-source reset arbitration and compatibility with 1.8V/3.3V/5V logic families via selectable pull-up voltage |
| –40°C to +85°C operation | Validated for deployment in industrial control panels, automotive body electronics, and outdoor sensor nodes |
Applications
| Smartphone Power Sequencing | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors main PMIC output during cold start and brown-out events in smartphone application processors. IC Role / Device Role / Timing Role: Voltage supervisor generating active-low reset pulse to hold AP in reset until core rail stabilizes at 3.3V. Use Value: Prevents illegal instruction execution by ensuring ≥220ms reset assertion time after VCC recovery, matching SoC boot ROM timing requirements. | Use Scenario: Supervises 3.3V FPGA configuration rail in programmable logic controller backplane modules. IC Role / Device Role / Timing Role: Dedicated reset generator with 3.3V threshold and open-drain output for FPGA PROG_B control. Use Value: Guarantees FPGA reconfiguration only after stable 3.3V rail is confirmed, eliminating partial bitstream loading failures. |
| Wireless Sensor Node | Medical Infusion Pump Controller |
Use Scenario: Ensures clean startup of ultra-low-power BLE SoC powered by CR2032 coin cell in environmental sensor tags. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor enabling >5-year battery life while maintaining robust reset behavior. Use Value: 1µA typical ICC extends operational lifetime without compromising reset reliability under weak-battery conditions. | Use Scenario: Validates 3.3V microcontroller supply in Class II medical infusion pump safety-critical subsystems. IC Role / Device Role / Timing Role: Safety-redundant voltage monitor feeding watchdog timer input and primary reset line. Use Value: ±1.5% threshold accuracy and 50ppm/°C tempco ensure consistent reset behavior across clinical operating environments (10–40°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803E33DBVR | 3.3V threshold, 200ms timeout, 0.5µA ICC, SOT-23-3 package (no NC pins) | Lacks dual NC pins; requires different PCB layout and offers no pin-compatible upgrade path | Select when board space is constrained and 3-pin footprint suffices |
| MAX809SEUR+T | 3.3V threshold, 240ms timeout, 10µA ICC, SOT-23-3 package | Higher supply current reduces battery life in energy-harvested devices; same 3-pin form factor | Select when legacy MAX809 compatibility is required and µA-level current is not critical |
Compared with TLV803E33DBVR and MAX809SEUR+T, the APX803L20-33W5-7 uniquely combines SOT25's mechanical robustness, dual NC pins for grounding flexibility, and industry-leading 1µA supply current-making it optimal for new designs prioritizing long-term battery operation and layout stability.
Availability
APX803L20-33W5-7 is available at Aetrix Electronics and suitable for industrial PLCs, portable medical devices, wireless sensor networks, and consumer electronics requiring stable component supply and guaranteed long-term manufacturability.
Supply support for APX803L20-33W5-7 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 belongs to Diodes' precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy reset generation in battery-constrained and thermally demanding embedded systems.
FAQ
What is the exact reset timeout value for APX803L20-33W5-7?
The APX803L20-33W5-7 provides a nominal reset timeout of 220ms, with guaranteed minimum and maximum values of 143ms and 297ms respectively across temperature and process variation. This is factory-trimmed and does not require external timing components.
Can APX803L20-33W5-7 monitor a 2.8V supply rail?
No - the "20" suffix denotes 220ms timeout, and "33" specifies a fixed 3.3V detection threshold. It is not adjustable and will assert reset if VCC falls below 3.3V ±1.5%. For 2.8V supervision, use APX803L20-28W5-7 (2.8V threshold variant).
Is the SOT25 package pin-to-pin compatible with SOT23 variants of APX803L?
No - the SOT25 (5-pin) has two NC pins (pins 4 and 5), while SOT23/SOT323/SC59 variants are 3-pin packages. Layout redesign is required; however, electrical functionality and timing behavior remain identical across all package options.
Does APX803L20-33W5-7 require an external capacitor on the RESET line?
No - the device contains fully integrated timing and hysteresis circuitry. No external capacitor, resistor, or other passive components are needed. A pull-up resistor on the open-drain RESET pin is required, but its value is determined by system logic voltage and rise-time requirements-not by the IC itself.
APX803L20-33W5-7 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:
- 3.3V
- 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
APX803L20-33W5-7 FAQ
1.How can I place an order for APX803L20-33W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-33W5-7 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 APX803L20-33W5-7 reliable?
The price and inventory of APX803L20-33W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-33W5-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-33W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-33W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-33W5-7?
APX803L20-33W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-33W5-7 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 APX803L20-33W5-7?
For technical support, including APX803L20-33W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-33W5-7 requirements.
6.How does Aetrix verify that APX803L20-33W5-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-33W5-7 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 APX803L20-33W5-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-33W5-7?
All APX803L20-33W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-33W5-7, 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 APX803L20-33W5-7 part is unused and in its original packaging.
Return procedure for APX803L20-33W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803L20-33W5-7 Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
Diodes Incorporated
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Diodes Incorporated
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EM Microelectronic
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Microchip Technology
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MCP120T-475I/TT
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