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Diodes Incorporated APX803L05-40SA-7
- Part No.:
- APX803L05-40SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L05-40SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,497
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Product details
Overview
APX803L05-40SA-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 450ms reset timeout. It features open-drain active-low RESET output and operates across –40°C to +85°C ambient range in battery-powered instrumentation and portable electronics.
For engineers reviewing the APX803L05-40SA-7 datasheet, APX803L05-40SA-7 pinout, APX803L05-40SA-7 application, or APX803L05-40SA-7 equivalent, this device delivers verified low-current supervision with fixed 5.0V detection, factory-set 450ms delay, and SOT23-3 compatibility-critical for space-constrained, power-sensitive embedded systems requiring reliable power-on reset sequencing.
Technical Context
The APX803L05-40SA-7 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 5.0V threshold, triggering an active-low open-drain RESET signal when VCC drops below VTH and holding it until VCC exceeds VTH + hysteresis (0.01×VTH). Its internal timing circuit enforces a guaranteed 450ms (min–max: 292–608ms) reset pulse width after recovery.
No external components are required: the device functions autonomously with only VCC, GND, and RESET connections. Its 1µA supply current and 20µs response time enable integration into ultra-low-power systems where quiescent current and fast fault detection are design-critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 5.0V ±1.5% - ensures accurate brown-out detection at nominal 5V rail without calibration. |
| Supply Current | 1.0µA typical - minimizes load on battery or energy-harvesting supplies in always-on monitoring. |
| Reset Timeout | 450ms (typical), 292–608ms (min–max) - guarantees sufficient processor reset hold time across temperature and process variation. |
| Output Type | Open-drain, active-low - enables wired-OR reset bus sharing and flexible pull-up voltage selection (up to 5.5V). |
| Response Time | 20µs max - detects rapid VCC dips before system instability occurs. |
| Operating Temp | –40°C to +85°C - supports industrial and consumer-grade embedded applications without derating. |
| Hysteresis | 0.01×VTH (50mV) - prevents oscillatory reset during slow VCC recovery near threshold. |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 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 resistor to define logic-high level and drive strength. |
| 3 (VCC) | Supply Input | Monitored power rail input; operates from 0.9V to 5.5V, enabling use on pre-regulated or post-LDO rails. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0V threshold | Factory-trimmed internal reference eliminates need for external resistive divider or calibration. |
| 450ms reset timeout | Internally generated delay ensures µP reset meets minimum assertion time requirements per ARM/Intel specs. |
| 1µA supply current | Enables multi-year operation on coin-cell batteries in IoT endpoint sensors and wearables. |
| ±1.5% threshold accuracy | Reduces margining overhead in power supply design, allowing tighter VCC tolerance budgets. |
| –40°C to +85°C operation | Validated performance across full industrial temperature range without external compensation. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 battery with intermittent BLE transmission. IC Role / Device Role / Timing Role: Voltage supervisor ensuring MCU resets cleanly if battery sags below 4.75V during RF burst. Use Value: 1µA quiescent current extends battery life beyond 2 years; 450ms reset guarantees full MCU initialization before sensor sampling. |
Use Scenario: DIN-rail mounted analog input module operating from 24VDC supply with local 5V LDO. IC Role / Device Role / Timing Role: Monitors 5V rail downstream of LDO to detect regulator failure or overcurrent shutdown. Use Value: ±1.5% threshold accuracy avoids nuisance resets during 24V line ripple; open-drain output interfaces directly to PLC watchdog timer input. |
| Smart Home Hub Power Sequencing | Automotive Body Control Module (Non-AEC) |
Use Scenario: Dual-rail hub (3.3V/5V) managing Zigbee, Thread, and USB peripherals. IC Role / Device Role / Timing Role: Supervises 5V rail to assert global reset if main DC-DC converter fails, coordinating safe state entry. Use Value: Fixed 5.0V detection eliminates BOM cost of adjustable supervisor; SOT23-3 footprint saves PCB area in dense layout. |
Use Scenario: Aftermarket infotainment accessory powered from vehicle 12V via buck converter. IC Role / Device Role / Timing Role: Detects brown-out during engine cranking (transient 6–9V) to prevent firmware corruption. Use Value: 20µs response time captures fast dips missed by slower supervisors; –40°C rating ensures cold-start reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803E50DBZR | 5.0V threshold, 200ms default delay, 0.5µA supply current, SOT23-3 | Lacks 450ms option; shorter delay may not meet long-reset MCU requirements | Select when lower IQ is critical and 200ms reset suffices |
| MAX809SEUR+T | 5.0V threshold, 240ms delay, 10µA supply current, SOT23-3 | Higher IQ reduces battery life; 240ms delay falls short of 450ms requirement | Choose only if legacy design reuse mandates MAX809 footprint and timing margin exists |
Compared with TLV803E50DBZR and MAX809SEUR+T, the APX803L05-40SA-7 uniquely delivers the combination of 450ms factory-set delay, 1µA IQ, and ±1.5% accuracy in SOT23-3-making it optimal for next-gen portable and industrial systems where timing compliance and power efficiency are jointly constrained.
Availability
APX803L05-40SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and smart home hub power sequencing requiring stable component supply, long-lifecycle support, and guaranteed parametric consistency.
Supply support for APX803L05-40SA-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 monitoring in battery-operated and space-constrained embedded systems.
FAQ
What is the exact reset timeout value for APX803L05-40SA-7?
The APX803L05-40SA-7 has a nominal reset timeout of 450ms, with a guaranteed range of 292ms (min) to 608ms (max) across temperature and process variation. This is factory-programmed and does not require external timing components.
Can APX803L05-40SA-7 monitor a 3.3V rail?
No-it is factory-configured for 5.0V threshold detection only. For 3.3V supervision, Diodes offers APX803L33-XXSA-7 (3.3V variant); using the 5.0V part on a 3.3V rail would prevent reset assertion under undervoltage conditions.
Does APX803L05-40SA-7 require an external pull-up resistor on RESET?
Yes-an external pull-up resistor is mandatory because the RESET pin is open-drain. Typical values range from 10kΩ to 100kΩ, connected to the voltage rail that the downstream logic expects for HIGH (e.g., 3.3V or 5V).
Is APX803L05-40SA-7 qualified for automotive AEC-Q100 applications?
No-this specific variant is not AEC-Q100 qualified. Diodes offers automotive-grade versions (e.g., APX803L05-40SA-7Q) with PPAP capability and IATF 16949 manufacturing; consult Diodes' automotive product definitions page for qualified part numbers.
APX803L05-40SA-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:
- 4V
- 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
APX803L05-40SA-7 FAQ
1.How can I place an order for APX803L05-40SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L05-40SA-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 APX803L05-40SA-7 reliable?
The price and inventory of APX803L05-40SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L05-40SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L05-40SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L05-40SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L05-40SA-7?
APX803L05-40SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L05-40SA-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 APX803L05-40SA-7?
For technical support, including APX803L05-40SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L05-40SA-7 requirements.
6.How does Aetrix verify that APX803L05-40SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L05-40SA-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 APX803L05-40SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L05-40SA-7?
All APX803L05-40SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L05-40SA-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 APX803L05-40SA-7 part is unused and in its original packaging.
Return procedure for APX803L05-40SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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