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Diodes Incorporated APX803L05-50SA-7
- Part No.:
- APX803L05-50SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L05-50SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,009
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Product details
Overview
APX803L05-50SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 5.0V threshold detection with ±1.5% accuracy, 1µA typical supply current, and 55ms reset timeout. It features open-drain active-low RESET output and operates across –40°C to +85°C ambient range in battery-powered and embedded digital systems.
For engineers reviewing the APX803L05-50SA-7 datasheet, APX803L05-50SA-7 pinout, APX803L05-50SA-7 application, or APX803L05-50SA-7 equivalent, this device supports critical power monitoring in portable equipment, microcontroller-based controllers, and low-power IoT endpoints where supply efficiency and reliable reset timing are essential.
Technical Context
The APX803L05-50SA-7 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 5.0V detection threshold with 0.01×VTH hysteresis. Its internal delay timer ensures RESET remains asserted for exactly 55ms after VCC recovers above threshold, eliminating external RC timing components.
It uses an open-drain output stage capable of sinking ≥3.5mA at 0.4V max VOL, compatible with standard CMOS/TTL logic interfaces. The device requires no external capacitors or resistors and achieves fast 20µs response to VCC drop events under recommended operating conditions (0.9–5.5V VCC).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 5.0V ±1.5% - precisely holds system reset until main supply stabilizes above nominal rail |
| Supply Current | 1.0µA typical - enables multi-year operation in coin-cell–powered devices without measurable battery drain |
| Reset Timeout | 55ms - guarantees sufficient hold time for µP initialization sequences before release |
| Response Time | 20µs - detects rapid brownout events faster than most µP internal watchdogs |
| Output Type | Open-drain, active-low - allows wired-OR reset bus configuration and flexible pull-up voltage selection |
| Operating Temp | –40°C to +85°C - validated for industrial-grade embedded control and portable consumer applications |
| Hysteresis | 0.01×VTH (50mV) - prevents oscillatory reset during marginal VCC recovery near threshold |
Pinout & Package
SOT23-3 package (JEDEC TO-236), 1.3mm × 2.9mm footprint, 1.45mm height, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Return path for internal circuitry and RESET sink current; must be low-impedance connection to system ground plane |
| 2 (RESET) | Open-Drain Output | Active-low reset signal; requires external pull-up to logic rail (e.g., VCC or I/O voltage); sinks up to 20mA |
| 3 (VCC) | Supply Input | Power input for detector core; accepts 0.9–5.5V; internally decoupled-no external capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| No external components needed | Integrated timing, reference, and comparator eliminate BOM cost and PCB area for discrete supervisory circuits |
| Ultra-low quiescent current | 1.0µA typ. enables use in always-on battery backup rails without compromising runtime |
| Precision threshold accuracy | ±1.5% over temperature ensures deterministic reset behavior across full industrial range |
| Fast 20µs detection latency | Responds within one microcontroller clock cycle to sudden VCC collapse, preventing corrupted state execution |
| Multiple delay options | Factory-set 55ms timeout matches common µP boot-time requirements without trimming or calibration |
Applications
| Smartphone Power Sequencing | Industrial PLC Controller |
|---|---|
Use Scenario: Monitors main PMIC output during cold start and deep-sleep wake-up cycles. IC Role / Device Role / Timing Role: Voltage supervisor generating clean, debounced reset pulse to application processor and baseband SoC. Use Value: Prevents firmware lockup by ensuring all logic blocks initialize only after stable 5.0V rail is confirmed for ≥55ms. | Use Scenario: Validates 5V auxiliary supply powering FPGA configuration memory and I/O buffers. IC Role / Device Role / Timing Role: Standalone reset generator with guaranteed minimum assertion time independent of software. Use Value: Eliminates need for FPGA-internal POR logic, reducing configuration risk and improving field reliability. |
| Wireless Sensor Node | Medical Wearable Monitor |
Use Scenario: Supervises coin-cell–powered BLE SoC supply during battery aging and temperature drift. IC Role / Device Role / Timing Role: Low-current threshold detector enabling long-term autonomous operation with predictable reset margin. Use Value: Maintains functional safety by asserting reset before brownout-induced ADC or radio corruption occurs. | Use Scenario: Ensures safe startup of ultra-low-power ECG front-end ASIC after button-press wake-up. IC Role / Device Role / Timing Role: Precision 5.0V supervisor with tight tolerance, guaranteeing analog signal chain stability before sampling begins. Use Value: Avoids false biometric readings caused by marginal supply during initial charge pump ramp-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G50DBVR | Higher 2.5µA supply current; 200ms default delay; requires external pull-up resistor | Designed for higher-noise industrial environments with enhanced ESD robustness (±4kV HBM) | Select when longer reset hold time and higher immunity are prioritized over ultra-low current draw |
| MAX809SEUR+T | Fixed 5.0V threshold but ±2.5% accuracy; 3.5µA supply current; 240ms delay | Legacy pinout (SOT23-3 identical) but lacks temperature-stable hysteresis design | Choose for drop-in replacement where tighter accuracy is not required and existing layout reuse is critical |
Compared with TPS3808G50DBVR and MAX809SEUR+T, the APX803L05-50SA-7 delivers superior current efficiency (1µA vs. ≥2.5µA) and tighter threshold accuracy (±1.5% vs. ±2.5%), making it optimal for energy-constrained, high-reliability designs where precise 55ms reset timing is mandatory.
Availability
APX803L05-50SA-7 is available at Aetrix Electronics and suitable for portable electronics, industrial controllers, and medical wearables requiring stable component supply with guaranteed long-term manufacturability.
Supply support for APX803L05-50SA-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 manufacturing certified to IATF 16949 and product compliance to RoHS, REACH, and halogen-free standards.
The APX803L series belongs to Diodes' precision power management portfolio, engineered specifically for ultra-low-power microprocessor supervision in space- and energy-constrained embedded systems.
FAQ
What is the exact reset threshold voltage and tolerance for APX803L05-50SA-7?
The APX803L05-50SA-7 has a factory-trimmed detection threshold of 5.0V with ±1.5% accuracy over the full operating temperature range (–40°C to +85°C), verified per DS38171 Rev. 3–2 electrical characteristics table. This corresponds to a guaranteed 4.925V to 5.075V window at +25°C, tightening to ±1.5% across temperature via integrated curvature compensation.
Can APX803L05-50SA-7 drive a 10kΩ pull-up resistor to 3.3V?
Yes. With a maximum VOL of 0.4V at 3.5mA sink current and typical ICC of 1µA, the APX803L05-50SA-7 easily drives a 10kΩ pull-up to 3.3V, resulting in <0.33mA load and <0.33V drop-well within its specified output capability and ensuring clean TTL/CMOS-compatible logic levels.
Is there a version with adjustable threshold or different delay time?
No-the APX803L05-50SA-7 has a fixed 5.0V threshold and factory-set 55ms delay. Diodes offers other variants (e.g., APX803L20-XXSA-7 for 2.0V/220ms, APX803L40-XXSA-7 for 4.0V/450ms), but no user-adjustable versions exist in the APX803L family; threshold and delay are laser-trimmed during wafer sort.
Does APX803L05-50SA-7 require an external bypass capacitor on VCC?
No. The APX803L05-50SA-7 is designed for zero-external-component operation. Its internal regulation and filtering eliminate the need for an external bypass capacitor, as confirmed in the Typical Applications Circuit and Absolute Maximum Ratings section of DS38171 Rev. 3–2, simplifying layout and reducing BOM count.
APX803L05-50SA-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:
- 5V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 35ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX803L05-50SA-7 FAQ
1.How can I place an order for APX803L05-50SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L05-50SA-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 APX803L05-50SA-7 reliable?
The price and inventory of APX803L05-50SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L05-50SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L05-50SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L05-50SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L05-50SA-7?
APX803L05-50SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L05-50SA-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 APX803L05-50SA-7?
For technical support, including APX803L05-50SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L05-50SA-7 requirements.
6.How does Aetrix verify that APX803L05-50SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L05-50SA-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 APX803L05-50SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L05-50SA-7?
All APX803L05-50SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L05-50SA-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 APX803L05-50SA-7 part is unused and in its original packaging.
Return procedure for APX803L05-50SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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