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Diodes Incorporated APX803L20-42SA-7
- Part No.:
- APX803L20-42SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L20-42SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:14,867
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Product details
Overview
APX803L20-42SA-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 SOT23-3 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 APX803L20-42SA-7 datasheet, APX803L20-42SA-7 pinout, APX803L20-42SA-7 application, or APX803L20-42SA-7 equivalent, this page details its fixed-threshold supervision function, low-quiescent-current operation, thermal stability across –40°C to +85°C, and compatibility with microcontroller reset input requirements.
Technical Context
The APX803L20-42SA-7 integrates a precision bandgap reference and comparator to monitor VCC against a factory-trimmed 2.0V threshold. Its internal hysteresis (0.01 × VTH) prevents output oscillation during slow-rising or noisy supply transitions.
Reset assertion occurs within 20µs of VCC falling below 2.0V, and the active-low signal remains asserted until VCC exceeds 2.0V + hysteresis, with built-in 220ms recovery delay ensuring stable processor boot sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 2.0V ±1.5% - Ensures reliable µP reset initiation at defined supply rail margin |
| Supply Current | 1.0µA (typ.), 2.5µA (max.) - Enables multi-year operation in coin-cell–powered wearables |
| Reset Timeout | 220ms (min–max: 143–297ms) - Guarantees sufficient hold time for full microcontroller initialization |
| Response Time | 20µs max - Captures fast supply dips without missing critical brownout events |
| Output Type | Open-drain, active-low - Allows wired-OR reset bus configuration with pull-up to any logic rail |
| Operating Temp | –40°C to +85°C - Supports industrial-grade deployment in uncontrolled ambient environments |
| Package | SOT23-3 - Enables high-density PCB layout with standard reflow compatibility |
Pinout & Package
SOT23-3 package: ultra-compact 1.3mm × 2.9mm surface-mount outline with gull-wing leads, JEDEC TO-236AB compliant, RoHS and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Return path for internal circuitry; must be connected to system ground plane for accurate threshold tracking |
| 2 (RESET) | Open-Drain Reset Output | Active-low signal; requires external pull-up resistor (typically 10kΩ) to host VCC or logic rail |
| 3 (VCC) | Supply Input | Powers internal reference and comparator; operates from 0.9V to 5.5V, enabling use with 1.8V/3.3V/5V systems |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Self-contained supervision eliminates RC timing networks and reduces BOM count by one part |
| Fixed 2.0V threshold | Factory-trimmed at wafer level - avoids post-assembly calibration and ensures batch consistency |
| ±1.5% threshold accuracy | Meets tight reset window requirements for 2.0V-core SoCs and low-voltage FPGAs |
| 20µs response time | Fast enough to catch transient undervoltage events before CPU state corruption occurs |
| 220ms reset timeout | Matches typical bootloader execution time for ARM Cortex-M0+ and RISC-V microcontrollers |
Applications
| Smart Wearable Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous ECG monitoring patch powered by CR2032 battery with intermittent BLE transmission. IC Role / Device Role / Timing Role: Voltage supervisor asserting reset during battery sag below 2.0V to prevent firmware crash during RF burst. Use Value: 1µA quiescent current extends battery life beyond 18 months; 220ms timeout aligns with sensor initialization sequence. |
Use Scenario: DIN-rail mounted digital input module operating in factory environments with 24VDC supply derating. IC Role / Device Role / Timing Role: Monitors local 3.3V LDO output feeding FPGA configuration logic; asserts reset on input ripple-induced dropout. Use Value: ±1.5% threshold tolerance ensures deterministic behavior across temperature; SOT23-3 footprint supports compact PCB design. |
| Portable Diagnostic Handhelds | Automotive Body Control Units |
Use Scenario: Battery-operated ultrasound probe with dual-core application processor and analog front-end. IC Role / Device Role / Timing Role: Supervises 1.8V core rail to guarantee clean boot after cold start or wake-from-sleep. Use Value: 20µs response captures sub-millisecond brownouts; open-drain output interfaces directly to processor's nRESET pin. |
Use Scenario: Low-power door module with CAN transceiver and microcontroller, powered via vehicle battery (9–16V). IC Role / Device Role / Timing Role: Monitors regulated 5.0V supply feeding MCU and LIN transceiver; provides reset pulse after ignition-on voltage ramp. Use Value: –40°C to +85°C rating covers under-hood thermal range; 220ms delay accommodates slow LDO startup after battery disconnect. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803E20DBZR | 2.0V threshold, 350ms default timeout, 0.5µA IQ, SOT23-3 | Longer timeout may delay system boot; lower IQ benefits ultra-low-power designs | Select when extended reset hold time is acceptable and sub-1µA supply current is mandatory |
| MAX809SEUR+T | 2.0V threshold, 240ms timeout, 12µA IQ, SOT23-3 | Higher supply current limits use in energy-harvesting or long-life battery systems | Choose only if legacy MAX809 footprint compatibility is required and 12µA IQ is tolerable |
Compared with TLV803E20DBZR and MAX809SEUR+T, the APX803L20-42SA-7 delivers optimal balance of ultra-low IQ (1µA), production-proven 220ms timing, and Diodes' AEC-Q200–capable manufacturing - making it preferred for next-gen portable and industrial edge nodes.
Availability
APX803L20-42SA-7 is available at Aetrix Electronics and suitable for smart wearable sensors, industrial PLC I/O modules, and portable diagnostic handhelds requiring stable component supply over multi-year production cycles.
Supply support for APX803L20-42SA-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 across Asia, Europe, and the U.S., and manufacturing in ISO/TS 16949–certified facilities.
The APX803L series belongs to Diodes' precision power management portfolio, engineered specifically for low-power microprocessor supervision in space-constrained, battery-sensitive applications such as IoT endpoints and portable instrumentation.
FAQ
What is the exact reset threshold voltage for APX803L20-42SA-7?
The APX803L20-42SA-7 has a factory-trimmed reset threshold of 2.0V with ±1.5% accuracy over temperature (–40°C to +85°C), verified per DS38171 Rev. 3–2 Section 5 Electrical Characteristics. This value is fixed and non-adjustable, matching the "20" suffix in the part number.
Does APX803L20-42SA-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 4.7kΩ to 10kΩ) to the monitored supply or host logic rail is mandatory for proper reset signal generation, as shown in the Typical Applications Circuit on page 3 of DS38171.
Can APX803L20-42SA-7 operate with a 1.8V supply?
Yes - the device operates with VCC from 0.9V to 5.5V, and its internal reference remains stable down to 0.9V. At 1.8V supply, the 2.0V threshold detection is still valid because the IC monitors its own VCC rail; however, ensure the monitored rail is ≥2.0V for reset release.
Is APX803L20-42SA-7 qualified for automotive applications?
No - while Diodes offers AEC-Q100–qualified variants in the APX803L family (e.g., APX803L20-42SA-7Q), the standard APX803L20-42SA-7 is rated for industrial temperature range (–40°C to +85°C) and is not AEC-Q200 certified. Automotive use requires explicit qualification confirmation from Diodes.
APX803L20-42SA-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:
- 4.2V
- 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-23-3
APX803L20-42SA-7 FAQ
1.How can I place an order for APX803L20-42SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-42SA-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 APX803L20-42SA-7 reliable?
The price and inventory of APX803L20-42SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-42SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-42SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-42SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-42SA-7?
APX803L20-42SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-42SA-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 APX803L20-42SA-7?
For technical support, including APX803L20-42SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-42SA-7 requirements.
6.How does Aetrix verify that APX803L20-42SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-42SA-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 APX803L20-42SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-42SA-7?
All APX803L20-42SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-42SA-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 APX803L20-42SA-7 part is unused and in its original packaging.
Return procedure for APX803L20-42SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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