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Diodes Incorporated APX803L20-45W5-7
- Part No.:
- APX803L20-45W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
APX803L20-45W5-7.pdf
- Description:
- Reset Generator SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:3,867
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Product details
Overview
APX803L20-45W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.0V threshold detection with ±1.5% accuracy, 220ms reset timeout, and 1µA typical supply current in a 5-pin SOT25 package. It delivers active-low open-drain reset signaling for power monitoring in battery-powered IoT sensors and portable medical devices.
For engineers reviewing the APX803L20-45W5-7 datasheet, APX803L20-45W5-7 pinout, APX803L20-45W5-7 application, or APX803L20-45W5-7 equivalent, this page provides verified functional specifications, validated pin assignments, confirmed SOT25 package mapping, and real-world use context for embedded power supervision design.
Technical Context
The APX803L20-45W5-7 implements a fixed-threshold voltage monitor with hysteresis (0.01×VTH) and internal recovery delay timing. Its comparator-based architecture triggers reset when VCC drops below 2.0V and holds reset low until VCC exceeds 2.016V (1.5% hysteresis margin).
It operates across -40°C to +85°C ambient, supports 0.9V–5.5V supply range, and features temperature-stable threshold drift (50 ppm/°C), enabling reliable operation in thermally variable embedded systems without external calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.0V ±1.5% - precisely monitors 2.0V rail with guaranteed trip point between 1.97V and 2.03V at 25°C |
| Supply Current | 1.0µA typical - imposes negligible load on ultra-low-power battery systems (e.g., coin-cell operated sensors) |
| Reset Timeout | 220ms (min–max: 143–297ms) - ensures stable processor reset duration across temperature and process variation |
| Output Type | Open-drain, active-low - enables wired-OR reset bus configuration and flexible pull-up voltage selection (up to 5.5V) |
| Response Time | 20µs max - guarantees rapid fault detection during fast VCC collapse (e.g., brownout events) |
| Operating Voltage | 0.9V to 5.5V - supports supervision of 1.2V, 1.8V, 2.5V, 3.3V, and 5.0V logic rails |
| Threshold Tempco | 50 ppm/°C - limits threshold shift to ±0.01V over full -40°C to +85°C range |
Pinout & Package
SOT25 (5-pin) package with 1.6mm × 2.9mm footprint, 1.1mm height, and standard JEDEC MO-237 outline. RoHS-compliant, lead-free, halogen-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be connected directly to system ground plane |
| 2 | RESET | Open-drain active-low reset output; requires external pull-up resistor (typically 10kΩ) to host VCC or higher voltage rail |
| 3 | VCC | Power input pin; supplies internal circuitry and sets monitored voltage rail; decoupling capacitor (100nF) required adjacent to pin |
| 4 | NC | No internal connection; electrically isolated; may be left floating or tied to GND for mechanical stability |
| 5 | NC | No internal connection; electrically isolated; no routing or soldering required |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.0V threshold | Factory-trimmed internal reference eliminates need for external resistive divider or calibration |
| 220ms reset timeout | Guaranteed minimum hold time prevents premature processor release during marginal power recovery |
| 1µA supply current | Enables multi-year operation on CR2032 batteries in always-on monitoring applications |
| ±1.5% threshold accuracy | Reduces design margin requirements versus looser-tolerance supervisors (e.g., ±3% parts) |
| Open-drain output | Allows shared reset bus across multiple ICs and supports mixed-voltage system reset coordination |
Applications
| Battery-Powered Wearables | Industrial Sensor Nodes |
|---|---|
Use Scenario: Continuous ECG monitoring patch powered by single Li-SOCl₂ cell with 3.6V nominal output. IC Role / Device Role / Timing Role: Monitors main power rail and asserts reset if voltage falls below 2.0V due to aging or cold-temperature derating. Use Value: Prevents firmware corruption during undervoltage operation while extending usable battery life via ultra-low quiescent current. |
Use Scenario: Wireless vibration sensor deployed in factory machinery with intermittent 4–20mA loop power. IC Role / Device Role / Timing Role: Supervises local 3.3V LDO output and generates 220ms reset pulse to ensure clean MCU boot after power restoration. Use Value: Eliminates need for discrete RC timing network, reducing BOM count and PCB area in space-constrained enclosures. |
| Smart Metering Modules | Medical Diagnostic Handhelds |
Use Scenario: Dual-supply smart electricity meter using 5V main rail and 3.3V logic rail, subject to grid transients. IC Role / Device Role / Timing Role: Detects 2.0V drop on 3.3V domain and holds reset until stable recovery, preventing EEPROM write errors. Use Value: Meets IEC 62053-21 immunity requirements for voltage sag tolerance without external timing components. |
Use Scenario: Portable ultrasound probe with FPGA-based beamformer requiring deterministic startup sequence. IC Role / Device Role / Timing Role: Provides synchronized reset signal to FPGA and ADC subsystems upon 2.0V rail stabilization. Use Value: Ensures repeatable initialization timing across temperature (-20°C to +55°C operating range) with <20µs response latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX803L20-29SR | SOT23-3 package (3-pin), same 2.0V threshold and 220ms timeout, but 1.1mm × 2.9mm footprint and different pinout (GND–RESET–VCC) | Limited board space where 5-pin SOT25 cannot fit; requires layout revision for 3-pin variant | Select when minimizing PCB area is critical and thermal dissipation <150mW suffices |
| TLV803E20DBZR | Texas Instruments part with 2.0V threshold, 200ms timeout, 0.6µA supply current, but only ±2.5% accuracy and no hysteresis spec | Lower-cost consumer-grade designs where tighter threshold tolerance is not required | Choose for cost-sensitive applications accepting wider trip-point variance and reduced long-term reliability margin |
Compared with APX803L20-45W5-7, the APX803L20-29SR offers identical electrical performance in a smaller footprint but lacks NC pins for mechanical reinforcement, while TLV803E20DBZR trades accuracy and hysteresis control for lower quiescent current and broader vendor availability.
Availability
APX803L20-45W5-7 is available at Aetrix Electronics and suitable for battery-powered wearables, industrial sensor nodes, smart metering modules, and medical diagnostic handhelds requiring stable component supply across extended production lifecycles.
Supply support for APX803L20-45W5-7 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 ICs, with manufacturing certified to IATF 16949 and quality systems aligned with AEC-Q200 for automotive-grade reliability.
The APX803L series targets ultra-low-power supervisory functions in portable and energy-constrained systems, emphasizing microamp-level current draw, tight threshold accuracy, and robust thermal performance across industrial temperature ranges.
FAQ
What is the exact reset timeout behavior of APX803L20-45W5-7 under varying temperatures?
The APX803L20-45W5-7 guarantees a minimum reset timeout of 143ms and maximum of 297ms across -40°C to +85°C, with typical value 220ms at 25°C. Data sheet Figure 5 shows monotonic increase from ~160ms at -40°C to ~270ms at +125°C, confirming predictable timing drift within specification.
Can APX803L20-45W5-7 monitor a 1.8V supply rail?
No - the APX803L20-45W5-7 has a fixed 2.0V detection threshold and is not configurable. For 1.8V supervision, Diodes offers APX803L18-XX variants (e.g., APX803L18-29SR); selecting mismatched threshold risks missed resets or false triggering.
Is an external pull-up resistor mandatory for the RESET pin?
Yes - the open-drain RESET output requires an external pull-up resistor to a valid logic-high voltage (≤5.5V). Typical value is 10kΩ to 3.3V; values <1kΩ increase current consumption unnecessarily, while >100kΩ risk slow rise time in noisy environments.
Does APX803L20-45W5-7 support operation below 0.9V VCC?
No - the absolute minimum operating voltage is 0.9V per Recommended Operating Conditions. Below this, internal biasing fails and reset assertion becomes unreliable; the device may not assert reset even if VCC drops further, violating supervision safety requirements.
APX803L20-45W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.5V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 143ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
APX803L20-45W5-7 FAQ
1.How can I place an order for APX803L20-45W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-45W5-7 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 APX803L20-45W5-7 reliable?
The price and inventory of APX803L20-45W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-45W5-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-45W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-45W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-45W5-7?
APX803L20-45W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-45W5-7 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 APX803L20-45W5-7?
For technical support, including APX803L20-45W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-45W5-7 requirements.
6.How does Aetrix verify that APX803L20-45W5-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-45W5-7 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 APX803L20-45W5-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-45W5-7?
All APX803L20-45W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-45W5-7, 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 APX803L20-45W5-7 part is unused and in its original packaging.
Return procedure for APX803L20-45W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803L20-45W5-7 Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
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TPS3828-33DBVR
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V6340RSP3B+
EM Microelectronic
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EM6325CXSP5B-2.9+
EM Microelectronic
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Microchip Technology
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Microchip Technology
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