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Diodes Incorporated APX803L-45W5-7
- Part No.:
- APX803L-45W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
APX803L-45W5-7.pdf
- Description:
- RESET GENERATOR SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:3,266
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Product details
Overview
APX803L-45W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply levels in battery-powered and embedded digital systems. It features a fixed 4.5V detection threshold, ±1.5% accuracy, 1µA typical supply current, open-drain active-low RESET output, and 450ms built-in recovery delay - enabling reliable power-up sequencing in portable instrumentation and IoT edge nodes.
For engineers reviewing the APX803L-45W5-7 datasheet, APX803L-45W5-7 pinout, APX803L-45W5-7 application, or APX803L-45W5-7 equivalent, key selection criteria include threshold voltage tolerance, reset timeout stability over temperature, low-quiescent-current impact on battery life, and SOT25 package compatibility with high-density PCB layouts.
Technical Context
The APX803L-45W5-7 implements a precision bandgap-based voltage reference with internal hysteresis (0.01×VTH) to prevent oscillation during supply ramping. Its comparator continuously monitors VCC against the 4.5V threshold and asserts RESET when VCC drops below that level.
Reset assertion is held until VCC rises above the release voltage (VTH_H = VTH + VHYS), after which the 450ms timeout period begins before RESET deassertion - a fixed-delay architecture requiring no external timing components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 4.5V ±1.5% - ensures accurate brown-out detection at nominal 5V rail without calibration. |
| Supply Current | 1.0µA typical - enables multi-year operation from coin-cell batteries in always-on monitoring applications. |
| Reset Delay | 450ms - provides sufficient hold time for microcontroller initialization and peripheral stabilization. |
| Output Type | Open-drain, active-low - supports wired-OR reset buses and flexible pull-up voltage selection (up to 5.5V). |
| Operating Voltage | 0.9V to 5.5V - allows supervision of 1.2V–5.0V logic supplies with margin for undervoltage transients. |
| Response Time | 20µs - guarantees fast fault capture during rapid supply collapse, critical for data integrity protection. |
Pinout & Package
APX803L-45W5-7 is housed in a 5-pin SOT25 package (3.0mm × 1.7mm × 1.3mm), optimized for space-constrained PCBs while maintaining thermal performance (θJA = 200°C/W). The package includes two NC pins to support pinout variants across the APX803L family.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be connected to system ground plane. |
| 2 | RESET | Open-drain active-low reset output; requires external pull-up to define logic-high level and drive strength. |
| 3 | VCC | Power supply input; powers internal circuitry and defines monitored rail - no separate reference input needed. |
| 4, 5 | NC | No connection; electrically isolated and not bonded - may be left floating or tied to GND for mechanical stability. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 4.5V threshold | Eliminates external resistor divider, reducing BOM count and layout area while guaranteeing production consistency. |
| ±1.5% threshold accuracy | Minimizes false resets across voltage/temperature variation, supporting robust operation from –40°C to +85°C ambient. |
| 450ms recovery delay | Meets JEDEC JESD78 Class II latch-up immunity requirements for microprocessor reset timing compliance. |
| 1µA supply current | Reduces standby power by >95% versus legacy reset ICs, extending battery life in wireless sensor nodes. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 battery with ultra-low-power MCU and BLE radio. IC Role / Device Role / Timing Role: Monitors 3.3V LDO output to assert RESET if battery voltage sags below 4.5V under load, preventing corrupted sensor readings. Use Value: 1µA quiescent current extends device runtime beyond 2 years; 450ms delay ensures stable BLE connection re-establishment post-reset. | Use Scenario: DIN-rail mounted programmable logic controller with isolated 24V DC input and 5V logic rails. IC Role / Device Role / Timing Role: Supervises 5V FPGA configuration supply to initiate controlled reboot upon undervoltage event caused by field wiring faults. Use Value: ±1.5% threshold accuracy prevents nuisance resets during transient 24V line dips; SOT25 footprint fits tight I/O board spacing. |
| Smart Home Hub Gateways | Automotive Body Control Modules |
Use Scenario: Wi-Fi/Zigbee hub with dual-core ARM processor, memory, and multiple radios operating from 5V SMPS. IC Role / Device Role / Timing Role: Detects 5V rail collapse during AC adapter disconnect or surge events, triggering orderly shutdown sequence via GPIO. Use Value: Open-drain output interfaces directly with 3.3V host MCU's interrupt pin; 20µs response captures fast transients missed by RC-based supervisors. | Use Scenario: Low-voltage body control unit (BCU) receiving switched 12V input regulated to 5V for microcontroller and CAN transceiver. IC Role / Device Role / Timing Role: Provides fail-safe reset signal to MCU when 5V rail drops due to alternator failure or cold-cranking dip. Use Value: 4.5V threshold aligns with automotive 5V regulator dropout specification; RoHS/Green compliance meets OEM material declarations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803E45DBZR | 4.5V threshold, 350ms delay, 0.5µA IQ, SOT23-3 package | Lacks NC pins; smaller footprint but no thermal relief advantage in high-power density designs | Preferred where board area is constrained and 350ms delay suffices for MCU boot timing. |
| MAX809SEUR+T | 4.5V threshold, 240ms delay, 10µA IQ, SOT23-3 package | Higher supply current reduces battery lifetime; no NC pins limits routing flexibility | Suitable for mains-powered systems where IQ is non-critical and cost sensitivity outweighs thermal performance. |
Compared with TLV803E45DBZR and MAX809SEUR+T, the APX803L-45W5-7 delivers superior thermal management via SOT25's lower θJA and longer 450ms delay for complex firmware initialization - making it optimal for thermally demanding, battery-critical applications.
Availability
APX803L-45W5-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home gateways, and automotive body control modules requiring stable component supply across multi-year production cycles.
Supply support for APX803L-45W5-7 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 devices, with design centers across Asia, Europe, and the US.
The APX803L series belongs to Diodes' precision power management portfolio, engineered specifically for ultra-low-power supervisory functions in battery-operated and energy-sensitive embedded systems.
FAQ
What is the exact reset threshold voltage and tolerance for APX803L-45W5-7?
The APX803L-45W5-7 has a factory-trimmed detection threshold of 4.5V with a guaranteed accuracy of ±1.5% over temperature (–40°C to +85°C) and supply voltage (0.9V to 5.5V), corresponding to a min/max range of 4.4325V to 4.5675V at +25°C per datasheet DS38171 Rev. 3-2.
Does APX803L-45W5-7 require external components for basic operation?
No. The APX803L-45W5-7 operates autonomously with only a VCC supply and GND connection. An external pull-up resistor on the RESET pin is required for proper logic-level translation, but no timing capacitors, resistors, or reference sources are needed - enabling true "plug-and-play" reset supervision.
How does the 450ms reset timeout behave during temperature variation?
The 450ms delay (for APX803L40 variant) remains stable across –40°C to +125°C, varying by less than ±5% per the datasheet timing plots. This minimal drift ensures consistent reset hold time regardless of enclosure thermal environment, critical for automotive and industrial deployments.
Can APX803L-45W5-7 be used with a 3.3V microcontroller I/O pin?
Yes. Its open-drain RESET output is compatible with 3.3V logic systems: connect the pull-up resistor to 3.3V, and the output will sink current to assert LOW (≤0.4V at 3.5mA). The RESET pin tolerates up to 5.5V, allowing safe interfacing even if the MCU's I/O voltage differs from VCC.
APX803L-45W5-7 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:
- 4.5V
- 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-45W5-7 FAQ
1.How can I place an order for APX803L-45W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L-45W5-7 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-45W5-7 reliable?
The price and inventory of APX803L-45W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L-45W5-7 is usually 5 days.
3.What payment methods are accepted for APX803L-45W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L-45W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L-45W5-7?
APX803L-45W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L-45W5-7 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-45W5-7?
For technical support, including APX803L-45W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L-45W5-7 requirements.
6.How does Aetrix verify that APX803L-45W5-7 is sourced from the original manufacturer or authorized distributors?
All APX803L-45W5-7 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-45W5-7 meets industry standards.
7.What is the process for return or replacement of APX803L-45W5-7?
All APX803L-45W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L-45W5-7, 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-45W5-7 part is unused and in its original packaging.
Return procedure for APX803L-45W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803L-45W5-7 Tags
-
MIC826SYMT-TR
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