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Diodes Incorporated APX803L-18W5-7
- Part No.:
- APX803L-18W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
APX803L-18W5-7.pdf
- Description:
- RESET GENERATOR SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:4,479
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Product details
Overview
APX803L-18W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply levels in embedded and battery-powered systems. It features a fixed 1.8V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and 220ms reset timeout - enabling reliable power-up sequencing in portable instrumentation and IoT edge nodes.
For engineers reviewing the APX803L-18W5-7 datasheet, APX803L-18W5-7 pinout, APX803L-18W5-7 application, or APX803L-18W5-7 equivalent, this device serves as a low-burden, precision reset supervisor where supply current <2.5µA, threshold stability over -40°C to +85°C, and configurable delay timing are critical selection criteria.
Technical Context
The APX803L-18W5-7 implements a comparator-based voltage supervision architecture with internal hysteresis (0.01×VTH) and temperature-compensated bandgap reference. Its reset assertion occurs when VCC drops below 1.8V and remains asserted until VCC exceeds 1.8V + hysteresis, ensuring noise immunity during brown-out recovery.
It operates across 0.9V–5.5V supply range and delivers sub-20µs reset response time upon VCC drop. The 220ms delay variant (indicated by "20" in part number) is factory-programmed and stable over temperature (±10% variation from -40°C to +85°C), eliminating external RC timing components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 1.8V ±1.5% - precise reset initiation point for 1.8V logic rails and low-voltage microcontrollers |
| Supply Current | 1.0µA typical - enables multi-year operation in coin-cell–powered devices without measurable battery drain |
| Reset Timeout | 220ms (typ.) - ensures sufficient hold time for full µP initialization and peripheral stabilization |
| Output Type | Open-drain, active-low - supports wired-OR reset bus architectures and flexible pull-up voltage selection |
| Response Time | <20µs - guarantees rapid fault detection during fast transients or sudden power collapse |
| Operating Temp | -40°C to +85°C - validated for industrial and extended-temperature embedded applications |
| VCC Range | 0.9V to 5.5V - compatible with single-cell Li-ion, 3.3V, and 5V system rails |
Pinout & Package
SOT25 (5-pin) package with 3 functional terminals and 2 no-connect pins; compact surface-mount footprint optimized for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection |
| 2 | RESET | Open-drain active-low reset signal; requires external pull-up to system VCC or logic rail |
| 3 | VCC | Power input and monitored supply rail; powers internal circuitry and senses voltage level |
| 4, 5 | NC | No internal connection; electrically isolated and may be left floating or tied to GND for mechanical stability |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 1.8V threshold | Factory-trimmed bandgap reference eliminates need for external resistor dividers or calibration |
| 220ms reset timeout | Internally generated delay ensures µP reset pulse meets ARM Cortex-M and RISC-V boot requirements |
| 1µA supply current | Enables integration into always-on sensor nodes without compromising battery lifetime |
| ±1.5% threshold accuracy | Guarantees consistent reset behavior across production lots and temperature extremes |
| Open-drain output | Allows shared reset bus across multiple ICs and compatibility with mixed-voltage systems |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose meters and wearable ECG monitors requiring ultra-low standby current and reliable cold-start reset. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET until regulated 1.8V rail stabilizes post-battery insertion or wake-up. Use Value: 1µA quiescent current extends shelf life and operational runtime; ±1.5% threshold prevents false resets during battery voltage sag. |
Use Scenario: DIN-rail mounted programmable logic controllers with isolated 1.8V FPGA configuration rails. IC Role / Device Role / Timing Role: Monitors auxiliary 1.8V supply feeding FPGA configuration memory; holds RESET for 220ms to ensure bitstream load completion. Use Value: Factory-set 220ms delay eliminates timing uncertainty from external RC networks; SOT25 package withstands industrial reflow profiles. |
| Smart Meter Communication Modules | Automotive Body Control Units |
Use Scenario: NB-IoT or LoRaWAN modules in electricity/water meters operating on primary lithium batteries. IC Role / Device Role / Timing Role: Supervises 1.8V MCU core supply during deep-sleep wake cycles and RF transmission bursts. Use Value: Sub-20µs response detects brief line dips during RF switching; hysteresis prevents chatter near threshold during marginal conditions. |
Use Scenario: Low-power door module ECUs powered from vehicle battery via LDO, requiring robust brown-out detection. IC Role / Device Role / Timing Role: Resets microcontroller when battery voltage sags below 1.8V during cranking or accessory load surges. Use Value: Validated -40°C to +85°C operation ensures reliability in under-hood environments; RoHS/Green compliance meets automotive material standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803E18DBVR | 1.8V threshold, 200ms delay, 0.5µA supply current, SOT-23-3 package | Lacks NC pins; smaller footprint but no mechanical redundancy; lower ICC reduces battery load further | Select when board space is constrained and 200ms delay suffices; verify compatibility with existing SOT25 land pattern |
| MAX809SEUR+T | 1.8V threshold, 140ms delay, 10µA supply current, SOT-23-3 package | Higher ICC increases battery drain; shorter delay may not meet modern µP boot timing | Use only in non-battery applications or where legacy design reuse justifies higher current and reduced timing margin |
Compared with TLV803E18DBVR and MAX809SEUR+T, the APX803L-18W5-7 offers superior thermal stability of delay timing, SOT25 mechanical robustness for automated assembly, and optimal balance of ultra-low ICC with industry-standard 220ms reset hold time.
Availability
APX803L-18W5-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter communication modules, and automotive body control units requiring stable component supply across long product lifecycles.
Supply support for APX803L-18W5-7 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 ICs, with emphasis on power management, signal integrity, and protection solutions.
The APX803L series belongs to Diodes' precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy reset generation in battery-critical and industrial-grade embedded systems.
FAQ
What is the function of pins 4 and 5 on the APX803L-18W5-7?
Pins 4 and 5 are no-connect (NC) terminals with no internal electrical connection. They serve mechanical anchoring purposes in the SOT25 package and may be left unconnected or tied to GND for improved solder joint reliability during reflow. No current flows through these pins, and they do not affect device functionality.
Can the APX803L-18W5-7 be used with a 1.2V supply rail?
No. The APX803L-18W5-7 requires a minimum VCC of 0.9V to operate, but its internal circuitry is designed to monitor rails ≥1.8V. Applying VCC = 1.2V will prevent proper internal biasing and result in undefined RESET behavior; it is not rated or characterized for use below its 1.8V detection threshold.
How does the 220ms reset timeout behave during temperature variation?
The 220ms delay is specified at +25°C and varies within ±10% across the full -40°C to +85°C operating range, as confirmed by characterization data in DS38171 Rev. 3–2 Figure 5. This stability is achieved via on-chip temperature-compensated RC timing, eliminating drift-related boot failures in thermally dynamic environments.
Is the APX803L-18W5-7 qualified for automotive applications?
The APX803L-18W5-7 is not AEC-Q100 qualified. Diodes Incorporated offers automotive-grade variants (e.g., APX803L-18W5-7Q) with PPAP capability, IATF 16949 manufacturing, and extended qualification testing. For automotive use, contact Diodes or Aetrix for the Q-grade version with full automotive change control documentation.
APX803L-18W5-7 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:
- 1.8V
- 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-18W5-7 FAQ
1.How can I place an order for APX803L-18W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L-18W5-7 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-18W5-7 reliable?
The price and inventory of APX803L-18W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L-18W5-7 is usually 5 days.
3.What payment methods are accepted for APX803L-18W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L-18W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L-18W5-7?
APX803L-18W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L-18W5-7 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-18W5-7?
For technical support, including APX803L-18W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L-18W5-7 requirements.
6.How does Aetrix verify that APX803L-18W5-7 is sourced from the original manufacturer or authorized distributors?
All APX803L-18W5-7 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-18W5-7 meets industry standards.
7.What is the process for return or replacement of APX803L-18W5-7?
All APX803L-18W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L-18W5-7, 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-18W5-7 part is unused and in its original packaging.
Return procedure for APX803L-18W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803L-18W5-7 Tags
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