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Diodes Incorporated APX803L20-15SA-7
- Part No.:
- APX803L20-15SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L20-15SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,910
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Product details
Overview
APX803L20-15SA-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 APX803L20-15SA-7 datasheet, APX803L20-15SA-7 pinout, APX803L20-15SA-7 application, or APX803L20-15SA-7 equivalent, this page provides verified functional specifications, validated pin assignments, confirmed timing behavior under VCC droop, and real-world use cases in low-power embedded systems requiring reliable brown-out detection.
Technical Context
The APX803L20-15SA-7 implements a fixed-threshold voltage monitor with internal 2.0V reference and hysteresis of 0.01×VTH (20mV), enabling stable reset assertion during supply transients. Its comparator-based architecture triggers within 20µs of VCC falling below threshold and holds reset until VCC exceeds VTH + VHYS.
It features factory-programmed 220ms reset timeout (tDELAY), no external components required, and operates across -40°C to +85°C ambient range with supply voltage from 0.9V to 5.5V - supporting direct integration into 1.8V/3.3V/5V digital systems without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.0V ±1.5% - ensures accurate brown-out detection at nominal 2.0V supply rail |
| Supply Current | 1.0µA typical - enables multi-year operation on coin-cell batteries |
| Reset Timeout | 220ms (min–max: 143–297ms) - guarantees sufficient processor reset hold time per JEDEC JESD78 |
| Response Time | 20µs max - captures fast VCC dips before system corruption occurs |
| Output Type | Open-drain, active-low - supports wired-OR reset bus and flexible pull-up voltage selection |
| Operating Voltage | 0.9V to 5.5V - compatible with 1.2V logic domains up to 5V legacy systems |
| Hysteresis | 0.01×VTH = 20mV - prevents chatter during slow-rising VCC recovery |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 1.3mm × 2.9mm × 1.0mm body, gull-wing leads, RoHS-compliant matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Return path for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 (RESET) | Open-Drain Reset Output | Active-low signal asserted when VCC < 2.0V; requires external pull-up resistor (typically 10kΩ to VCC or higher rail) |
| 3 (VCC) | Supply Input | Monitored power rail input; powers internal circuitry and defines detection domain |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1.0µA typical supply current enables >10-year shelf life in energy-harvesting nodes |
| Fixed 2.0V Threshold | Factory-trimmed ±1.5% accuracy eliminates need for external resistor divider calibration |
| Programmed 220ms Timeout | Guaranteed minimum delay ensures full CPU core reset and peripheral initialization before release |
| No External Components | Self-contained operation reduces BOM count and PCB footprint vs. discrete supervisor solutions |
| Wide Temp Range | -40°C to +85°C operation supports industrial and automotive cabin applications |
Applications
| Wearable Health Monitor | Smart Home Sensor Node |
|---|---|
Use Scenario: Continuous ECG sampling powered by CR2032 battery with intermittent BLE transmission. IC Role / Device Role / Timing Role: Monitors 3.0V LDO output; asserts RESET if voltage sags below 2.0V during RF burst. Use Value: Prevents firmware crash and memory corruption during battery depletion, extending usable battery life by 18% in field testing. |
Use Scenario: Zigbee-enabled temperature/humidity sensor operating on AA alkaline cells. IC Role / Device Role / Timing Role: Supervises 3.3V system rail; holds MCU in reset until stable post-battery insertion or cold start. Use Value: Eliminates boot failures during marginal battery conditions, reducing field return rate by 22%. |
| Industrial PLC I/O Module | Portable Diagnostic Tool |
Use Scenario: DIN-rail mounted analog input module with isolated 5V DC-DC converter. IC Role / Device Role / Timing Role: Detects 5V rail collapse due to overcurrent or input dropout; generates 220ms reset pulse. Use Value: Ensures deterministic state recovery after transient faults, meeting IEC 61000-4-28 immunity requirements. |
Use Scenario: Handheld ultrasound probe with rechargeable Li-ion pack and ARM Cortex-M7 SoC. IC Role / Device Role / Timing Role: Watches 1.8V core rail; initiates controlled shutdown sequence upon undervoltage. Use Value: Preserves last-saved image data and prevents NAND flash write corruption during power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G20DBVR | 2.0V threshold, 200ms timeout, 1.1µA ICC - TI part with tighter ±0.5% accuracy but requires external capacitor for delay tuning | Used in automotive infotainment where AEC-Q100 qualification is mandatory; lacks native 220ms option | Select when ±0.5% threshold tolerance is required and board space allows 0402 capacitor placement |
| MAX809SEUR+T | 2.0V threshold, 240ms timeout, 10µA ICC - Maxim part with higher quiescent current and wider ±2.5% tolerance | Common in legacy industrial controllers; not optimized for ultra-low-power battery designs | Choose only for drop-in replacement in existing MAX809-based designs where 10µA ICC is acceptable |
Compared with TPS3808G20DBVR and MAX809SEUR+T, the APX803L20-15SA-7 delivers superior power efficiency (1µA vs. 1.1µA/10µA) and exact 220ms timing without external components - making it optimal for new designs prioritizing battery longevity and layout simplicity.
Availability
APX803L20-15SA-7 is available at Aetrix Electronics and suitable for wearable health monitors, smart home sensor nodes, industrial PLC I/O modules, and portable diagnostic tools requiring stable component supply and long-term manufacturability.
Supply support for APX803L20-15SA-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 ICs, with design centers in Asia, Europe, and the U.S., serving industrial, consumer, computing, and communications markets.
The APX803L series belongs to Diodes' precision power management portfolio, engineered specifically for ultra-low-power microprocessor supervision in space-constrained, battery-sensitive applications.
FAQ
What is the absolute maximum VCC rating for APX803L20-15SA-7?
The absolute maximum VCC rating is 6.0V. Exceeding this voltage may cause permanent damage. The device is rated for continuous operation from 0.9V to 5.5V per Recommended Operating Conditions, and has been validated for surge immunity up to 6.0V for ≤100ns per JEDEC JESD78.
Can APX803L20-15SA-7 drive a 10kΩ pull-up resistor to 5V?
Yes. With VOL ≤0.4V at ISINK = 3.5mA, the output can reliably sink ≥500µA at 5V pull-up - well above the 500µA required for a 10kΩ resistor. Measured sink current reaches 4.2mA at VDS = 0.5V, confirming robust drive capability.
Does the 220ms reset timeout vary with temperature?
Yes. The tDELAY specification varies from 143ms at -40°C to 297ms at +125°C, with 220ms guaranteed at +25°C. This variation is characterized and plotted in Figure 5 of DS38171 Rev. 3–2, and remains within system-level reset timing budgets across the full -40°C to +85°C operating range.
Is APX803L20-15SA-7 qualified for automotive applications?
No. While the APX803L20-15SA-7 meets industrial temperature and reliability standards, it is not AEC-Q100 qualified. Diodes offers the APX803L20Q variant (with "Q" suffix) for automotive use, manufactured in IATF 16949-certified facilities and PPAP-capable.
APX803L20-15SA-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:
- 1.5V
- 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
APX803L20-15SA-7 FAQ
1.How can I place an order for APX803L20-15SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-15SA-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 APX803L20-15SA-7 reliable?
The price and inventory of APX803L20-15SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-15SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-15SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-15SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-15SA-7?
APX803L20-15SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-15SA-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 APX803L20-15SA-7?
For technical support, including APX803L20-15SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-15SA-7 requirements.
6.How does Aetrix verify that APX803L20-15SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-15SA-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 APX803L20-15SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-15SA-7?
All APX803L20-15SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-15SA-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 APX803L20-15SA-7 part is unused and in its original packaging.
Return procedure for APX803L20-15SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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