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Diodes Incorporated APX803L-29C3-7
- Part No.:
- APX803L-29C3-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
APX803L-29C3-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:2,695
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Product details
Overview
APX803L-29C3-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply rails in battery-powered and embedded digital systems. It features a fixed 2.9V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and 220ms reset timeout - enabling reliable power-up sequencing in portable instrumentation and IoT edge nodes.
For engineers reviewing the APX803L-29C3-7 datasheet, APX803L-29C3-7 pinout, APX803L-29C3-7 application, or APX803L-29C3-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, open-drain sink capability (3.5mA @ 0.4V), and SOT323 package compatibility with space-constrained PCB layouts.
Technical Context
The APX803L-29C3-7 implements a precision bandgap-based voltage reference with internal hysteresis (0.01×VTH) to prevent oscillation during slow VCC ramps. Its comparator continuously monitors VCC against the factory-trimmed 2.9V threshold and asserts RESET low within 20µs when VCC drops below VTH–100mV.
Reset release occurs only after VCC exceeds VTH + hysteresis, and the device maintains RESET assertion for a guaranteed 220ms (typ.) after recovery - a fixed internal delay independent of external components or supply voltage variation between 0.9V and 5.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 2.9V ±1.5% - ensures accurate brown-out detection at nominal 3.3V or 3.0V logic rails |
| Supply Current | 1.0µA (typ.), 2.5µA (max.) - enables multi-year operation on coin-cell batteries |
| Reset Timeout | 220ms (typ.) - provides sufficient hold time for µP initialization and peripheral stabilization |
| Response Time | 20µs max. - guarantees fast fault capture before system state corruption |
| Output Type | Open-drain, active-low - supports wired-OR reset buses and flexible pull-up voltage selection |
| Operating Voltage | 0.9V to 5.5V - compatible with 1.8V, 2.5V, 3.3V, and 5V domains without level-shifting |
| Temperature Range | –40°C to +85°C - validated for industrial ambient conditions |
Pinout & Package
SOT323 (SC-70) 3-pin surface-mount package with 1.3mm × 2.1mm footprint and 0.65mm lead pitch - optimized for high-density portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be connected to system ground plane |
| 2 | RESET | Open-drain active-low reset output; requires external pull-up to host VCC or supervisor rail |
| 3 | VCC | Power input; supplies internal reference and comparator; decoupling capacitor (100nF) recommended |
Key Features
| Feature | Design Value |
|---|---|
| Threshold Accuracy | ±1.5% over –40°C to +85°C - eliminates need for external calibration in cost-sensitive designs |
| No External Components | Self-contained detection circuit - reduces BOM count and layout area vs. discrete resistor-divider solutions |
| Low-Temp Drift | 50ppm/°C threshold coefficient - maintains stable trip point across automotive and industrial thermal profiles |
| ESD Robustness | ±4000V HBM - protects against handling damage during assembly and field service |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 battery with ultra-low quiescent current requirement. IC Role / Device Role / Timing Role: Voltage supervisor ensuring MCU reset remains asserted until 3.0V rail stabilizes post-battery insertion. Use Value: 1µA supply current extends battery life beyond 5 years; 2.9V threshold matches Li-MnO₂ discharge curve endpoint. | Use Scenario: DIN-rail mounted analog input module operating in factory-floor environments with 24VDC supply derating. IC Role / Device Role / Timing Role: Brown-out detector triggering controlled shutdown before ADC reference collapse. Use Value: ±1.5% threshold accuracy prevents false resets during 24V ripple; 220ms timeout accommodates line transient recovery. |
| Smart Home Hub Controllers | Asset Tracking Beacons |
Use Scenario: Wi-Fi/BLE hub using dual-supply architecture (3.3V core, 1.8V I/O) with shared reset propagation. IC Role / Device Role / Timing Role: Primary reset generator asserting common RESET# net to all voltage domains. Use Value: Open-drain output enables wired-OR with other supervisors; 20µs response captures fast dips from RF switching noise. | Use Scenario: GPS-enabled logistics tag powered by primary lithium thionyl chloride cell with 10-year shelf life. IC Role / Device Role / Timing Role: Power-on validation circuit verifying minimum VCC before enabling GPS receiver and cellular modem. Use Value: Guaranteed 220ms reset pulse ensures full modem boot sequence completes; SOT323 footprint minimizes board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803E29DBVR | 2.9V threshold, 350ms reset timeout, 0.5µA supply current, SOT23-3 package | Longer timeout may delay system recovery in fast-cycle sensor nodes | Select when extended reset hold time is required for complex firmware initialization |
| MAX809SEUR+T | 2.93V threshold, 140ms timeout, 10µA supply current, SOT23-3 package | Higher ICC reduces battery lifetime; tighter 2.93V threshold less tolerant of 3.0V rail tolerance | Prefer for legacy designs where MAX809 footprint compatibility is mandatory |
Compared with TLV803E29DBVR and MAX809SEUR+T, the APX803L-29C3-7 delivers optimal balance of ultra-low ICC (1µA), precise 2.9V trip point, and industry-standard 220ms timeout - making it ideal for new energy-harvesting and long-life battery applications where both accuracy and efficiency are critical.
Availability
APX803L-29C3-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub controllers, and asset tracking beacons requiring stable component supply across multi-year production cycles.
Supply support for APX803L-29C3-7 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 for power management, signal integrity, and connectivity applications.
The APX803L series belongs to Diodes' µP supervisory product line, engineered specifically for ultra-low-power, high-accuracy voltage monitoring in battery-critical and space-constrained embedded systems.
FAQ
What is the exact reset timeout duration for APX803L-29C3-7?
The APX803L-29C3-7 has a fixed 220ms (typical) reset active timeout period, confirmed in the Electrical Characteristics table (tDELAY = 143ms min / 220ms typ / 297ms max for "20" suffix). This delay begins after VCC recovers above the threshold and is internally generated without external timing components.
Does APX803L-29C3-7 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 host VCC) is mandatory to establish a valid high-level logic state when not asserted. The datasheet specifies a maximum sink current of 20mA and VOL ≤ 0.4V at 3.5mA.
Can APX803L-29C3-7 operate reliably at 1.2V supply voltage?
No - the minimum operating VCC is 0.9V, but the 2.9V detection threshold requires VCC ≥ 2.9V to function as intended. At 1.2V, the internal reference cannot stabilize, and RESET behavior is undefined per Recommended Operating Conditions (VCC min = 0.9V applies only to device biasing, not threshold validity).
Is the SOT323 package of APX803L-29C3-7 RoHS-compliant and halogen-free?
Yes - the APX803L-29C3-7 is fully RoHS 3 compliant (2015/863/EU) and halogen-free per Diodes Incorporated's Green definition: <900ppm Br, <900ppm Cl (<1500ppm total Br+Cl), and <1000ppm Sb compounds, with no purposely added lead.
APX803L-29C3-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- 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:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
APX803L-29C3-7 FAQ
1.How can I place an order for APX803L-29C3-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L-29C3-7 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-29C3-7 reliable?
The price and inventory of APX803L-29C3-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L-29C3-7 is usually 5 days.
3.What payment methods are accepted for APX803L-29C3-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L-29C3-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L-29C3-7?
APX803L-29C3-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L-29C3-7 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-29C3-7?
For technical support, including APX803L-29C3-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L-29C3-7 requirements.
6.How does Aetrix verify that APX803L-29C3-7 is sourced from the original manufacturer or authorized distributors?
All APX803L-29C3-7 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-29C3-7 meets industry standards.
7.What is the process for return or replacement of APX803L-29C3-7?
All APX803L-29C3-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L-29C3-7, 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-29C3-7 part is unused and in its original packaging.
Return procedure for APX803L-29C3-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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