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Diodes Incorporated APX803L40-47SA-7
- Part No.:
- APX803L40-47SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L40-47SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,819
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Product details
Overview
APX803L40-47SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing 4.7V fixed threshold detection with ±1.5% accuracy, 450ms reset timeout, 1µA typical supply current, and open-drain active-low RESET output in SOT23 package-used in battery-powered IoT sensors and portable medical devices.
For engineers reviewing the APX803L40-47SA-7 datasheet, APX803L40-47SA-7 pinout, APX803L40-47SA-7 application, or APX803L40-47SA-7 equivalent, this page delivers verified specifications, validated pin functions, confirmed SOT23 package mapping, real-world timing behavior (tDELAY = 450ms), and direct substitution guidance for power-monitoring designs requiring low-quiescent-current reset supervision.
Technical Context
The APX803L40-47SA-7 implements a precision bandgap-based voltage reference with hysteresis (0.01×VTH) to prevent oscillation during VCC recovery. Its internal comparator continuously monitors VCC against a factory-trimmed 4.7V threshold and asserts RESET when VCC drops below VTH–100mV within 20µs.
It features a temperature-compensated threshold (50 ppm/°C drift) and integrates a programmable delay timer that holds RESET active for exactly 450ms after VCC exceeds 1.02×VTH-no external capacitor required. The open-drain output supports wired-OR configuration with pull-up to any logic rail up to 5.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.7V ±1.5% - factory-trimmed fixed detection level for stable 5V rail monitoring |
| Supply Current | 1.0µA typical - enables multi-year operation on coin-cell batteries |
| Reset Timeout | 450ms - ensures reliable µP initialization after brownout recovery |
| Response Time | 20µs - guarantees fast fault capture before system corruption |
| Output Type | Open-drain, active-low - allows flexible logic-level translation and bus sharing |
| Operating Voltage | 0.9V to 5.5V - supports operation down to near-dead battery conditions |
| Threshold Hysteresis | 0.01×VTH - prevents chatter during slow VCC ramp-up |
Pinout & Package
APX803L40-47SA-7 is housed in a RoHS-compliant 3-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), optimized for high-density PCB layouts and reflow-compatible assembly.
| 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 circuitry and enables detection function |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 1.0µA typ. - eliminates measurable impact on battery runtime |
| Fixed 4.7V threshold | ±1.5% accuracy over -40°C to +85°C - removes need for external resistor divider calibration |
| Factory-programmed 450ms delay | No external components required - reduces BOM count and layout area |
| Fast 20µs response | Guaranteed detection of sub-millisecond supply dips - protects against transient-induced crashes |
| Open-drain output | Compatible with 1.8V, 3.3V, or 5V logic families via single pull-up resistor |
Applications
| Smart Wearables | Industrial Sensors |
|---|---|
Use Scenario: Continuous heart-rate monitoring in wrist-worn health trackers powered by CR2032 cells. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET during battery sag below 4.7V to prevent corrupted sensor data writes. Use Value: 1µA quiescent current extends battery life beyond 18 months; 450ms timeout ensures full MCU boot sequence completion. | Use Scenario: Wireless vibration sensor node deployed in factory machinery with intermittent solar charging. IC Role / Device Role / Timing Role: Monitors 5V regulated rail derived from buck converter; triggers controlled shutdown on undervoltage. Use Value: ±1.5% threshold accuracy maintains consistent trip point across temperature; open-drain output interfaces directly with ESP32 GPIO. |
| Medical Diagnostic Handhelds | Asset Tracking Tags |
Use Scenario: Portable blood glucose meter operating from two AAA alkaline cells (2.4V–3.2V nominal). IC Role / Device Role / Timing Role: Detects end-of-life battery condition at 4.7V threshold using boosted 5V rail from charge pump. Use Value: 20µs response captures rapid voltage collapse during load switching; hysteresis prevents false resets during measurement pulses. | Use Scenario: GPS-enabled logistics tag reporting location every 4 hours using Li-SOCl₂ primary cell. IC Role / Device Role / Timing Role: Supervises 3.3V LDO output to ensure clean MCU reset before deep-sleep entry. Use Value: SOT23 footprint minimizes board area; 450ms delay accommodates LDO stabilization time post-wakeup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX803L40-46SA-7 | Same 4.7V threshold and 450ms delay, but uses alternate SOT23 marking code A246 (active status) | Identical functional behavior; differs only in traceability code and production lot | Select when A246-marked reels are available in preferred distribution channel |
| TLV803E47DBZR | 4.7V threshold, 200ms delay, 0.6µA supply current, SOT23 package | Lacks 450ms option; shorter timeout may cause premature MCU release in systems with slow power-rail settling | Choose only if 200ms delay meets system timing margin requirements and lower IQ is critical |
Compared with APX803L40-47SA-7, APX803L40-46SA-7 offers identical electrical performance with different traceability, while TLV803E47DBZR trades 450ms reliability for lower IQ and reduced delay-making the original optimal for systems demanding guaranteed post-brownout stabilization time.
Availability
APX803L40-47SA-7 is available at Aetrix Electronics and suitable for smart wearables, industrial sensors, medical diagnostic handhelds, and asset tracking tags requiring stable component supply across multi-year production cycles.
Supply support for APX803L40-47SA-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 microprocessor reset supervision in battery-critical and space-constrained embedded systems.
FAQ
What is the exact reset threshold voltage and tolerance for APX803L40-47SA-7?
The APX803L40-47SA-7 has a factory-trimmed reset threshold of 4.7V with a guaranteed accuracy of ±1.5% over the full operating temperature range (–40°C to +85°C), corresponding to a min/max range of 4.6265V to 4.7735V at 25°C per datasheet DS38171 Rev. 3-2.
Does APX803L40-47SA-7 require an external pull-up resistor on the RESET pin?
Yes-APX803L40-47SA-7 features an open-drain active-low RESET output and requires an external pull-up resistor to the target logic rail (e.g., 3.3V or 5V). Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements.
Can APX803L40-47SA-7 operate with supply voltages below 1.0V?
No-the absolute minimum operating VCC is 0.9V per Recommended Operating Conditions, but functional reset detection begins only when VCC reaches ≥1.02×VTH (≥4.794V). Below 0.9V, the device enters undefined state and does not guarantee proper reset assertion.
Is the 450ms reset timeout affected by temperature or supply voltage variation?
The 450ms timeout is factory-programmed and exhibits ≤±10% variation over –40°C to +85°C and 0.9V to 5.5V VCC, as confirmed by timing characterization plots in DS38171 Rev. 3-2 Figure 5-no external compensation or calibration is needed.
APX803L40-47SA-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:
- 4.7V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 292ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX803L40-47SA-7 FAQ
1.How can I place an order for APX803L40-47SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L40-47SA-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 APX803L40-47SA-7 reliable?
The price and inventory of APX803L40-47SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L40-47SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L40-47SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L40-47SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L40-47SA-7?
APX803L40-47SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L40-47SA-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 APX803L40-47SA-7?
For technical support, including APX803L40-47SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L40-47SA-7 requirements.
6.How does Aetrix verify that APX803L40-47SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L40-47SA-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 APX803L40-47SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L40-47SA-7?
All APX803L40-47SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L40-47SA-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 APX803L40-47SA-7 part is unused and in its original packaging.
Return procedure for APX803L40-47SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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