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Diodes Incorporated APX803L20-25SA-7
- Part No.:
- APX803L20-25SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L20-25SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,288
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Product details
Overview
APX803L20-25SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply integrity in battery-powered and low-power digital systems. It features a fixed 2.5V detection threshold (±1.5% accuracy), 1µA typical supply current, 220ms reset timeout, open-drain active-low RESET output, and operates across –40°C to +85°C ambient range - deployed in portable instrumentation and embedded controllers requiring reliable power-on reset.
For engineers reviewing the APX803L20-25SA-7 datasheet, APX803L20-25SA-7 pinout, APX803L20-25SA-7 application, or APX803L20-25SA-7 equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use scenarios, and validated alternative options for power-supply monitoring in space-constrained, energy-sensitive designs.
Technical Context
The APX803L20-25SA-7 implements a precision bandgap-based voltage reference with internal hysteresis (0.01×VTH) to prevent oscillation during supply ramp-up/down. Its comparator triggers an open-drain RESET signal when VCC falls below 2.5V and holds it asserted until VCC exceeds the release threshold (2.5V + hysteresis).
Reset assertion timing includes a fixed 220ms timeout after VCC recovery, with sub-20µs response latency upon initial undervoltage detection. The device requires no external components and draws only 1µA at nominal conditions, enabling integration into always-on monitoring paths without compromising system efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 2.5V ±1.5% - precise brown-out detection point for 2.5V logic rails and I/O domains |
| Supply Current | 1.0µA (typ.), 2.5µA (max.) - enables multi-year operation on coin-cell batteries |
| Reset Timeout | 220ms (min–max: 143–297ms) - ensures sufficient hold time for µP initialization sequences |
| Response Latency | <20µs - 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 Temp | –40°C to +85°C - qualified for industrial and extended-temperature embedded applications |
| Package | SOT23-3 - 2.9mm × 1.3mm footprint compatible with high-density PCB layouts |
Pinout & Package
SOT23-3 package: 2.9mm × 1.3mm × 1.0mm body, gull-wing leads, RoHS-compliant, lead-free, halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Return path for internal circuitry and RESET sink current; must connect to system ground plane |
| 2 (VCC) | Supply Input | Monitored power rail input; operates from 0.9V to 5.5V; powers internal reference and comparator |
| 3 (RESET) | Open-Drain Output | Active-low reset signal; requires external pull-up; sinks up to 20mA; asserts when VCC < 2.5V |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Reduces BOM count and layout area; eliminates capacitor aging and resistor tolerance risks |
| Fixed 2.5V threshold with ±1.5% accuracy | Meets tight reset window requirements for 2.5V FPGA I/O banks and ARM Cortex-M3/M4 core supplies |
| 220ms factory-programmed reset timeout | Matches typical boot firmware execution time; avoids premature release before memory initialization |
| 1µA typical supply current | Enables continuous supervision in ultra-low-power sleep modes without degrading battery life |
| –40°C to +85°C operating range | Supports deployment in unheated industrial enclosures and automotive cabin electronics |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose meters and pulse oximeters require guaranteed reset at power-on and brown-out events to prevent corrupted sensor calibration data. IC Role / Device Role / Timing Role: Voltage detector providing active-low RESET signal synchronized to 2.5V analog front-end supply rail. Use Value: Prevents invalid ADC conversions by holding µC in reset until stable 2.5V reference is established. |
Use Scenario: DIN-rail mounted PLC modules operate in wide-temperature industrial environments where 24V DC supplies may sag under load. IC Role / Device Role / Timing Role: Supervisory IC monitoring local 2.5V LDO output powering FPGA configuration memory and I/O buffers. Use Value: Ensures deterministic FPGA reconfiguration and I/O state initialization after supply recovery. |
| Smart Home Hub Controllers | Wearables with Low-Power BLE SoCs |
Use Scenario: Wi-Fi/BLE gateways integrate multiple voltage rails; 2.5V supplies power RF transceivers and secure elements needing clean startup sequencing. IC Role / Device Role / Timing Role: Dedicated reset supervisor for 2.5V domain, decoupled from main 3.3V µP supply. Use Value: Eliminates race conditions between RF subsystem readiness and host processor boot completion. |
Use Scenario: Fitness trackers use coin-cell batteries; long-term storage causes voltage droop, requiring reliable wake-from-sleep reset assurance. IC Role / Device Role / Timing Role: Ultra-low-current voltage monitor asserting RESET during storage-induced VCC sag below 2.5V. Use Value: Guarantees full system reset on first power-up after shelf life, preventing firmware lockup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EA25DBZR | 2.5V threshold, 350ms timeout, 0.5µA supply current, SOT23-3 | Longer timeout suits slower µP boot; lower current benefits multi-year battery life | Select when extended reset hold time or sub-1µA quiescent current is critical |
| MAX809SEUR+T | 2.5V threshold, 140ms timeout, 12µA supply current, SOT23-3 | Higher ICC limits use in coin-cell applications; faster timeout fits rapid-boot SoCs | Select when legacy compatibility or faster release timing outweighs current budget constraints |
Compared with TLV803EA25DBZR and MAX809SEUR+T, the APX803L20-25SA-7 delivers optimal balance of 220ms timeout alignment with mainstream µP boot sequences, 1µA current draw for multi-year battery operation, and ±1.5% threshold accuracy for robust 2.5V rail supervision - making it ideal for next-generation portable and industrial edge devices.
Availability
APX803L20-25SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and smart home hub controllers requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for APX803L20-25SA-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 power-rail monitoring in battery-operated and energy-conscious embedded systems.
FAQ
What is the exact reset threshold voltage and tolerance for APX803L20-25SA-7?
The APX803L20-25SA-7 has a factory-trimmed detection threshold of 2.5V with a guaranteed accuracy of ±1.5% over temperature (–40°C to +85°C), corresponding to a range of 2.4625V to 2.5375V at +25°C. This specification is confirmed in the Electrical Characteristics table of DS38171 Rev. 3–2, Section 4.
Does APX803L20-25SA-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 to a valid logic supply (e.g., 1.8V, 2.5V, or 3.3V) is mandatory for proper operation. Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements, as shown in the Typical Applications Circuit on page 2 of DS38171.
Can APX803L20-25SA-7 monitor supply voltages below 2.5V, such as 1.8V or 1.2V?
No - the "25" in APX803L20-25SA-7 denotes a fixed 2.5V detection threshold. It cannot monitor lower rails. For 1.8V supervision, use APX803L20-18SA-7; for 1.2V, use APX803L20-12SA-7. All variants share identical timing and current specs but differ only in factory-set VTH.
Is APX803L20-25SA-7 qualified for automotive applications per AEC-Q100?
No - APX803L20-25SA-7 is not AEC-Q100 qualified. Diodes Incorporated explicitly states in the datasheet (page 1) that automotive-grade versions require specific change control, PPAP capability, and IATF 16949 manufacturing - and directs automotive users to contact their local representative for qualified alternatives.
APX803L20-25SA-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:
- 2.5V
- 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
APX803L20-25SA-7 FAQ
1.How can I place an order for APX803L20-25SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-25SA-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 APX803L20-25SA-7 reliable?
The price and inventory of APX803L20-25SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-25SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-25SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-25SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-25SA-7?
APX803L20-25SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-25SA-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 APX803L20-25SA-7?
For technical support, including APX803L20-25SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-25SA-7 requirements.
6.How does Aetrix verify that APX803L20-25SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-25SA-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 APX803L20-25SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-25SA-7?
All APX803L20-25SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-25SA-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 APX803L20-25SA-7 part is unused and in its original packaging.
Return procedure for APX803L20-25SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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