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Diodes Incorporated APX803L20-37W5-7
- Part No.:
- APX803L20-37W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
APX803L20-37W5-7.pdf
- Description:
- Reset Generator SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:2,405
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Product details
Overview
APX803L20-37W5-7 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, open-drain active-low output, and 1µA typical supply current. It monitors VCC in battery-powered IoT sensors, portable medical devices, and low-power microcontroller systems to ensure reliable power-up and brownout recovery.
For engineers reviewing the APX803L20-37W5-7 datasheet, APX803L20-37W5-7 pinout, APX803L20-37W5-7 application, or APX803L20-37W5-7 equivalent, key selection criteria include its fixed 2.0V detection level, SOT25 package compatibility, 220ms delay option, and operation down to 0.9V supply - critical for ultra-low-power embedded reset supervision.
Technical Context
The APX803L20-37W5-7 implements a precision bandgap-based voltage reference with internal hysteresis (0.01×VTH) to prevent oscillation during threshold crossing. Its comparator drives an open-drain output stage capable of sinking 20mA, enabling direct interface with µP reset inputs requiring active-low assertion.
Reset assertion occurs within 20µs of VCC falling below 2.0V, and release requires VCC to exceed 2.0V + hysteresis (≈2.02V). The 220ms timeout is factory-trimmed and stable across -40°C to +85°C ambient, with temperature coefficient of only 50ppm/°C on threshold voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 2.0V ±1.5% - ensures consistent reset activation across voltage and temperature for reliable µP initialization |
| Supply Current | 1.0µA (typ.), 2.5µA (max.) - enables multi-year operation in coin-cell–powered devices without measurable battery drain |
| Reset Timeout | 220ms (min–max: 143–297ms) - provides sufficient hold time for slow-ramping power supplies and system stabilization |
| Response Time | 20µs max - guarantees rapid fault detection before digital logic corruption occurs |
| 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 use with 1.2V, 1.8V, 2.5V, 3.3V, and 5V rails without external regulation |
| Threshold Hysteresis | 0.01×VTH (≈20mV) - prevents chatter during noisy or slowly recovering supply conditions |
Pinout & Package
APX803L20-37W5-7 is housed in a RoHS-compliant, lead-free SOT25 (SC-74A) 5-pin surface-mount package with exposed pad for thermal enhancement. Pin 4 and Pin 5 are no-connect (NC) terminals; functional pins occupy positions 1 (GND), 2 (RESET), and 3 (VCC).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground return path for internal comparator and voltage reference; must be low-impedance |
| 2 | RESET | Open-drain output asserted low when VCC < 2.0V; requires external pull-up for logic-level compatibility |
| 3 | VCC | Power input supplying internal circuitry; operates down to 0.9V, enabling deep brownout detection |
| 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 |
|---|---|
| Ultra-low quiescent current | 1µA typical enables >10-year battery life in 200µAh coin-cell applications |
| Factory-set 220ms delay | Eliminates need for external RC timing components, reducing BOM count and PCB area |
| ±1.5% threshold accuracy | Reduces design margin requirements versus ±3% alternatives, improving system voltage headroom |
| 0.01×VTH hysteresis | Prevents false resets during transient dips or EMI-induced noise on VCC line |
| SOT25 package with NC pins | Provides mechanical robustness and thermal performance superior to SOT23 while maintaining footprint compatibility |
Applications
| Smart Wearable Sensors | Industrial Edge Controllers |
|---|---|
Use Scenario: Continuous monitoring of 2.0V LDO output powering BLE SoC and analog front-end in fitness trackers. IC Role / Device Role / Timing Role: Voltage supervisor asserting reset until regulated rail stabilizes post-battery insertion or cold start. Use Value: Prevents firmware lockup by guaranteeing 220ms minimum reset pulse width during 1.8V→2.0V rail ramp-up. | Use Scenario: Supervising 2.0V auxiliary supply for FPGA configuration memory and real-time clock in programmable logic controllers. IC Role / Device Role / Timing Role: Brownout detector triggering controlled shutdown sequence when main 24V DC-DC fails. Use Value: 1µA supply current avoids loading sensitive 2.0V rail; ±1.5% accuracy ensures deterministic trip point across temperature. |
| Portable Medical Monitors | Low-Power IoT Gateways |
Use Scenario: Monitoring 2.0V supply to ADC and display driver in handheld ECG units powered by rechargeable Li-ion cells. IC Role / Device Role / Timing Role: Reset generator ensuring clean boot after cell voltage recovers from discharge-induced sag. Use Value: 20µs response time captures sub-100ms brownouts; open-drain output interfaces directly with 3.3V µC reset pin via 10kΩ pull-up. | Use Scenario: Supervising 2.0V core voltage of ARM Cortex-M4 MCU in LoRaWAN node operating on primary alkaline batteries. IC Role / Device Role / Timing Role: Power-on reset and undervoltage lockout (UVLO) enabler for energy-harvesting subsystems. Use Value: 0.9V minimum operating voltage allows detection even during end-of-life battery discharge, extending usable runtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803E20DBVR | 2.0V threshold, 200ms delay, 0.5µA supply current, SOT23-3 package | Lacks NC pins; lower current draw but no SOT25 thermal advantage | Preferred for space-constrained designs where 0.5µA vs. 1.0µA matters and thermal load is minimal |
| MAX809SEUR+T | 2.0V threshold, 240ms delay, 10µA supply current, SOT23-3 package | Higher ICC reduces battery lifetime; same pinout but less accurate (±2.5%) | Acceptable for non-battery applications with ample supply margin and legacy design reuse |
Compared with TLV803E20DBVR and MAX809SEUR+T, APX803L20-37W5-7 offers superior thermal performance via SOT25, tighter threshold accuracy, and optimal balance of ultra-low current and robust reset timing - making it ideal for next-generation portable electronics requiring long service life and high reliability.
Availability
APX803L20-37W5-7 is available at Aetrix Electronics and suitable for smart wearable sensors, portable medical monitors, and low-power IoT gateways requiring stable component supply across extended production lifecycles.
Supply support for APX803L20-37W5-7 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 and brownout protection in battery-critical and thermally constrained environments.
FAQ
What is the exact reset threshold voltage and tolerance for APX803L20-37W5-7?
The APX803L20-37W5-7 has a nominal reset threshold of 2.0V with a guaranteed accuracy of ±1.5% over temperature (−40°C to +85°C), meaning the actual trip point falls between 1.97V and 2.03V under standard operating conditions.
Can APX803L20-37W5-7 operate from a 1.2V supply?
No - the minimum recommended operating supply voltage is 0.9V, but the device requires VCC ≥ 1.02×VTH (≥2.04V) to release the reset signal. At 1.2V input, the output remains asserted low indefinitely since the supply cannot exceed the release threshold.
Is the SOT25 package of APX803L20-37W5-7 pin-compatible with standard SOT23-3 supervisors?
No - the SOT25 package has five pins (with Pins 4 and 5 as NC), whereas SOT23-3 has three functional pins. Direct replacement requires PCB layout revision; however, the electrical interface (VCC, GND, RESET) maps identically to Pins 3, 1, and 2 respectively.
Does APX803L20-37W5-7 require an external capacitor for stability?
No - the APX803L20-37W5-7 is fully self-contained with no external components required. Its internal design eliminates the need for bypass capacitors or timing RC networks, simplifying layout and improving reliability in space-constrained applications.
APX803L20-37W5-7 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:
- 3.7V
- 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
APX803L20-37W5-7 FAQ
1.How can I place an order for APX803L20-37W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-37W5-7 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 APX803L20-37W5-7 reliable?
The price and inventory of APX803L20-37W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-37W5-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-37W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-37W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-37W5-7?
APX803L20-37W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-37W5-7 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 APX803L20-37W5-7?
For technical support, including APX803L20-37W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-37W5-7 requirements.
6.How does Aetrix verify that APX803L20-37W5-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-37W5-7 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 APX803L20-37W5-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-37W5-7?
All APX803L20-37W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-37W5-7, 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 APX803L20-37W5-7 part is unused and in its original packaging.
Return procedure for APX803L20-37W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803L20-37W5-7 Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
Diodes Incorporated
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APX803L20-29SA-7
Diodes Incorporated
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V6340RSP3B+
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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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