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Diodes Incorporated APX803L-25W5-7
- Part No.:
- APX803L-25W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
APX803L-25W5-7.pdf
- Description:
- RESET GENERATOR SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:1,112
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Product details
Overview
APX803L-25W5-7 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 2.5V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and 220ms reset timeout delay. Used in portable instrumentation and low-power microcontroller power-up sequencing.
For engineers reviewing the APX803L-25W5-7 datasheet, APX803L-25W5-7 pinout, APX803L-25W5-7 application, or APX803L-25W5-7 equivalent, this page delivers verified specifications, SOT25 package layout, real-world use cases in portable equipment and µC supervision, and validated alternative parts with documented timing and threshold differences.
Technical Context
The APX803L-25W5-7 implements a precision bandgap-based voltage reference with hysteresis (0.01×VTH) to prevent oscillation during threshold crossing. Its internal comparator triggers an open-drain RESET signal when VCC drops below 2.5V and holds it active for 220ms after recovery.
It operates across –40°C to +85°C ambient, supports supply voltages from 0.9V to 5.5V, and delivers 20μs response time from VCC drop to RESET assertion. No external components are required-only a 100nF bypass capacitor is recommended per the typical application circuit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 2.5V ±1.5% - precise brown-out detection for 2.5V logic domains |
| Supply Current | 1.0µA (typ.) - enables multi-year battery life in always-on monitoring |
| Reset Timeout Delay | 220ms - ensures stable µP initialization after power recovery |
| Output Type | Open-drain, active-low - compatible with wired-OR reset buses and diverse VCC levels |
| Response Time | 20µs - fast assertion prevents system lockup during transient dips |
| Operating Voltage Range | 0.9V to 5.5V - supports single-cell Li-ion, 1.8V/3.3V/5V rails |
| Temperature Range | –40°C to +85°C - qualified for industrial and portable consumer environments |
Pinout & Package
SOT25 (5-pin) package with 3 functional pins (VCC, RESET, GND) and 2 no-connect (NC) terminals. Compact 2.9mm × 1.6mm footprint, 1.1mm height, suitable for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage |
| 2 | RESET | Open-drain active-low reset signal; requires external pull-up |
| 3 | VCC | Power input; supplies internal reference and comparator circuitry |
| 4, 5 | NC | No internal connection; must be left unconnected or grounded per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.5V threshold | Eliminates external resistor network; reduces BOM count and layout area |
| 220ms built-in delay | Guarantees sufficient hold time for µP reset deassertion without external RC timing |
| ±1.5% threshold accuracy | Ensures deterministic reset behavior across voltage and temperature variations |
| 1µA supply current | Minimizes quiescent load on primary power rail in energy-sensitive applications |
| RoHS-compliant, halogen-free | Meets global environmental compliance requirements for commercial and industrial shipments |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose meters and pulse oximeters requiring reliable power-on reset under varying battery discharge profiles. IC Role / Device Role / Timing Role: Monitors 2.5V analog front-end supply and asserts RESET until stable operation is confirmed. Use Value: Prevents corrupted ADC readings or firmware crashes during weak-battery startup. |
Use Scenario: DIN-rail mounted programmable logic controllers with isolated 2.5V auxiliary rails powering communication interfaces. IC Role / Device Role / Timing Role: Supervises isolated 2.5V domain and provides 220ms reset hold to synchronize FPGA configuration and serial interface initialization. Use Value: Eliminates need for discrete RC reset timers and improves long-term reliability in harsh EMI environments. |
| Smart Home Hub Controllers | Wearable Fitness Trackers |
Use Scenario: Multi-rail smart home hubs using 2.5V for BLE/Wi-Fi coexistence logic and sensor fusion processors. IC Role / Device Role / Timing Role: Detects brown-out on 2.5V domain and forces controlled reboot before RF interference disrupts mesh network stability. Use Value: Reduces field-reported "ghost disconnects" caused by undetected supply sag during concurrent radio transmission. |
Use Scenario: Ultra-low-power wearables with coin-cell batteries where every nanoamp impacts runtime. IC Role / Device Role / Timing Role: Provides 2.5V supply supervision with sub-µA quiescent draw and fast 20µs response to transient dips. Use Value: Extends usable battery life by >12% versus higher-current supervisors while maintaining robust reset integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX803L20-25SA | Same 2.5V threshold and 220ms delay, but in 3-pin SOT23 package (no NC pins) | Requires different PCB footprint and lacks NC pins for mechanical stability in high-vibration environments | Select when board space is constrained and no NC anchoring is needed |
| TLV803EB25DBZR | 2.5V threshold, 200ms delay, 0.5µA supply current, but ±2.5% accuracy and no hysteresis spec | Lower accuracy may cause marginal reset behavior near VTH; unsuitable for tight-margin 2.5V systems | Choose only if ultra-low current dominates over reset precision and timing consistency |
Compared with APX803L-25W5-7, APX803L20-25SA offers identical electrical performance in a smaller 3-pin package but sacrifices mechanical robustness, while TLV803EB25DBZR trades accuracy and hysteresis control for lower quiescent current-making the APX803L-25W5-7 optimal for designs prioritizing deterministic reset timing and industrial-grade tolerance.
Availability
APX803L-25W5-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub controllers, and wearable fitness trackers requiring stable component supply across production lifecycles.
Supply support for APX803L-25W5-7 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 US.
The APX803L series belongs to Diodes' precision power-supervision product line, engineered specifically for ultra-low-power, high-accuracy reset generation in battery-operated and space-constrained embedded systems.
FAQ
What is the exact reset timeout delay for APX803L-25W5-7?
The APX803L-25W5-7 has a guaranteed reset active timeout period of 220ms (typical), with min/max values of 143ms and 297ms respectively, measured from the moment VCC rises above 1.02×VTH until RESET deasserts. This delay is factory-trimmed and temperature-compensated across –40°C to +85°C.
Can APX803L-25W5-7 be used with a 1.8V supply rail?
No. The APX803L-25W5-7 requires a minimum VCC of 0.9V to operate, but its 2.5V detection threshold means it is intended for monitoring rails ≥2.5V. Using it on a 1.8V rail would prevent proper reset assertion, as VCC cannot reach the threshold level required to release RESET.
Is an external pull-up resistor required on the RESET pin?
Yes. The RESET pin is open-drain and active-low, so an external pull-up resistor (typically 10kΩ to the monitored VCC or host logic rail) is mandatory to establish a valid high-level logic state when not asserted. No internal pull-up is integrated.
Does APX803L-25W5-7 include hysteresis, and what is its value?
Yes. The device includes built-in hysteresis of 0.01×VTH (25mV for the 2.5V variant), specified as ∆VTH = VTH_H – VTH_L. This ensures clean, bounce-free reset release and prevents chatter during slow-rising or noisy supply conditions.
APX803L-25W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.5V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 0ms Typical
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
APX803L-25W5-7 FAQ
1.How can I place an order for APX803L-25W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L-25W5-7 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-25W5-7 reliable?
The price and inventory of APX803L-25W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L-25W5-7 is usually 5 days.
3.What payment methods are accepted for APX803L-25W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L-25W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L-25W5-7?
APX803L-25W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L-25W5-7 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-25W5-7?
For technical support, including APX803L-25W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L-25W5-7 requirements.
6.How does Aetrix verify that APX803L-25W5-7 is sourced from the original manufacturer or authorized distributors?
All APX803L-25W5-7 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-25W5-7 meets industry standards.
7.What is the process for return or replacement of APX803L-25W5-7?
All APX803L-25W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L-25W5-7, 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-25W5-7 part is unused and in its original packaging.
Return procedure for APX803L-25W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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