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Diodes Incorporated APX803L20-29W-7
- Part No.:
- APX803L20-29W-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L20-29W-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC59
- Quantity:
- Payment:
- Shipping:
Inventory:424
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Product details
Overview
APX803L20-29W-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.9V threshold detection with ±1.5% accuracy, 1µA typical supply current, open-drain active-low reset output, and 220ms reset timeout. It monitors VCC in battery-powered embedded systems to ensure reliable power-on reset and brownout recovery.
For engineers reviewing the APX803L20-29W-7 datasheet, APX803L20-29W-7 pinout, APX803L20-29W-7 application, or APX803L20-29W-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, low quiescent current impact on system battery life, and compatibility with 3-pin SC59 package layout constraints.
Technical Context
The APX803L20-29W-7 implements a precision bandgap-based voltage reference with internal hysteresis (0.01×VTH) to prevent oscillation during threshold crossing. Its comparator drives an open-drain NMOS output stage capable of sinking ≥3.5mA at 0.4V drop.
Reset assertion occurs within 20µs when VCC falls below 2.9V, and release requires VCC to exceed 2.9V + hysteresis (≈2.929V). The 220ms timeout (typ. 143–297ms over -40°C to +85°C) is factory-fixed and does not require external timing components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 2.9V ±1.5% - ensures accurate brownout detection for 3.0V/3.3V logic rails |
| Supply Current | 1.0µA (typ.), 2.5µA (max.) - enables multi-year operation in coin-cell-powered IoT sensors |
| Reset Timeout | 220ms (typ.), 143–297ms (–40°C to +85°C) - provides sufficient hold time for µP initialization sequences |
| Output Type | Open-drain, active-low - supports wired-OR reset bus and flexible pull-up voltage selection |
| Response Time | ≤20µs - guarantees fast fault capture before µP state corruption |
| Operating Voltage | 0.9V to 5.5V - supports direct connection to Li-ion, NiMH, and regulated 1.8V–3.3V supplies |
| Hysteresis | 0.01×VTH (≈29mV) - prevents chatter during slow VCC recovery near threshold |
Pinout & Package
APX803L20-29W-7 is housed in a 3-pin SC59 (SOT-23 variant) surface-mount package with gull-wing leads, RoHS-compliant matte tin plating, and thermal resistance θJA = 200°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground return for internal comparator and bandgap circuitry |
| 2 | RESET | Open-drain output; pulled low during reset, high-impedance otherwise |
| 3 | VCC | Power input; powers internal circuitry and defines detection rail |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 1.0µA typ. - eliminates measurable drain on energy-harvesting or button-cell systems |
| Factory-trimmed threshold | 2.9V ±1.5% - removes need for external resistor dividers or calibration |
| Fixed 220ms reset timeout | Guaranteed 143–297ms range across full temp - replaces RC timing networks and improves BOM reliability |
| No external components | Self-contained detection and timing - reduces PCB area and assembly cost vs. discrete solutions |
| SC59 package compatibility | Pin-to-pin compatible with SOT23 footprints - simplifies layout reuse and manufacturing transition |
Applications
| Smart Wearable Power Supervision | Industrial Sensor Node Reset |
|---|---|
Use Scenario: A wrist-worn health monitor uses a CR2032 battery and ARM Cortex-M0+ MCU requiring clean power-on reset and brownout protection. IC Role / Device Role / Timing Role: APX803L20-29W-7 asserts active-low RESET until VCC stabilizes above 2.9V, then holds reset for 220ms to allow LDO and clock startup. Use Value: 1µA quiescent current extends battery life beyond 3 years; ±1.5% threshold ensures consistent behavior across production units and temperature. | Use Scenario: A wireless temperature sensor node in a factory environment operates from a 3.0V Li-SOCl₂ battery and must survive voltage sag during RF transmission bursts. IC Role / Device Role / Timing Role: Monitors main supply rail and triggers hardware reset if VCC dips below 2.9V during peak current draw, preventing firmware lockup. Use Value: 20µs response time captures transient sags missed by slower supervisors; SC59 package withstands reflow and vibration stress. |
| Medical Diagnostic Handheld | Automotive Body Control Module (BCM) |
Use Scenario: A portable ECG device powered by rechargeable Li-ion must guarantee deterministic boot sequence after power cycling or low-battery shutdown. IC Role / Device Role / Timing Role: Generates a guaranteed 220ms reset pulse upon power application, synchronizing MCU, ADC, and display controller initialization. Use Value: Factory-set timeout eliminates timing variability from capacitor aging or temperature drift found in RC-based solutions. | Use Scenario: A BCM subassembly monitors 12V-derived 3.3V rail for microcontrollers managing door locks and lighting functions. IC Role / Device Role / Timing Role: Detects undervoltage events caused by load dump or alternator failure, asserting RESET to halt unsafe actuator commands. Use Value: –40°C to +85°C operating range and ±1.5% threshold accuracy meet automotive ambient requirements without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX803L20-29SA-7 | SOT23 package (same pinout), identical electrical specs, slightly higher θJA (200°C/W vs. SC59's 200°C/W) | Preferred for standard SOT23 footprint designs; same thermal performance but different land pattern | Select when board layout uses legacy SOT23 pads and no redesign is permitted |
| TLV803E29DBZR | Texas Instruments part; 2.93V threshold (±0.5%), 0.65µA ICC, 200ms timeout, SOT23-3 | Higher accuracy and lower current, but tighter tolerance increases cost and may over-specify for many applications | Choose only if design requires <±1.0% threshold tolerance or sub-1µA supply current |
Compared with APX803L20-29SA-7, the SC59 package offers identical thermal and electrical behavior with improved mechanical robustness; versus TLV803E29DBZR, the APX803L20-29W-7 trades minor accuracy for broader industrial temperature support and lower unit cost in volume production.
Availability
APX803L20-29W-7 is available at Aetrix Electronics and suitable for smart wearables, industrial sensor nodes, medical handhelds, and automotive body control modules requiring stable component supply across extended product lifecycles.
Supply support for APX803L20-29W-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 emphasis on power management, signal integrity, and protection solutions.
The APX803L series belongs to Diodes' precision voltage supervisor product line, engineered specifically for ultra-low-power, high-reliability monitoring in battery-constrained and thermally demanding embedded systems.
FAQ
What is the exact reset threshold voltage and its tolerance for APX803L20-29W-7?
The APX803L20-29W-7 has a nominal reset threshold of 2.90V with a guaranteed tolerance of ±1.5% (±43.5mV) over temperature and process variation, measured at TA = +25°C and specified across –40°C to +85°C operating range per DS38171 Rev. 3–2.
Does APX803L20-29W-7 require external components to function?
No. The APX803L20-29W-7 is fully self-contained: it needs only VCC, GND, and a pull-up resistor on the open-drain RESET pin. No capacitors, resistors, or timing components are required for basic supervision functionality.
What is the maximum sink current capability of the RESET output?
The RESET pin can sink up to 20mA continuously (absolute max rating), with a typical VOL of ≤0.4V at ISINK = 3.5mA and VCC = VTH – 0.2V, enabling direct interface with most µP reset inputs and logic-level translators.
Is APX803L20-29W-7 qualified for automotive applications?
APX803L20-29W-7 is not AEC-Q100 qualified. For automotive use, Diodes recommends contacting their sales team for PPAP-capable, IATF 16949-manufactured alternatives such as the APX809 series with AEC-Q100 Grade 2 certification.
APX803L20-29W-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.9V
- 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:
- SC-59-3
APX803L20-29W-7 FAQ
1.How can I place an order for APX803L20-29W-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-29W-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 APX803L20-29W-7 reliable?
The price and inventory of APX803L20-29W-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-29W-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-29W-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-29W-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-29W-7?
APX803L20-29W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-29W-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 APX803L20-29W-7?
For technical support, including APX803L20-29W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-29W-7 requirements.
6.How does Aetrix verify that APX803L20-29W-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-29W-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 APX803L20-29W-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-29W-7?
All APX803L20-29W-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-29W-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 APX803L20-29W-7 part is unused and in its original packaging.
Return procedure for APX803L20-29W-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803L20-29W-7 Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
Diodes Incorporated
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