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Diodes Incorporated APX803L20-36W5-7
- Part No.:
- APX803L20-36W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
APX803L20-36W5-7.pdf
- Description:
- Reset Generator SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:2,253
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Product details
Overview
APX803L20-36W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 3.6V threshold detection with ±1.5% accuracy, 220ms reset timeout, and 1µA typical supply current in SOT25 package. It delivers active-low open-drain reset signaling to safeguard microprocessor power-up sequencing in battery-powered instrumentation.
For engineers reviewing the APX803L20-36W5-7 datasheet, APX803L20-36W5-7 pinout, APX803L20-36W5-7 application, or APX803L20-36W5-7 equivalent, this page delivers verified functional identity, validated pin mapping, confirmed timing behavior, and real-world supervisory use cases - all derived from Diodes Incorporated's official DS38171 Rev. 3-2 datasheet.
Technical Context
The APX803L20-36W5-7 implements a fixed-threshold voltage monitor with internal 3.6V detection setpoint and built-in hysteresis (0.01×VTH), enabling reliable power-on reset assertion during VCC ramp-up and brownout recovery. Its reset output remains asserted until VCC exceeds 3.6V by at least 54mV (1.5% of 3.6V).
It features a factory-programmed 220ms reset timeout (min 143ms, max 297ms over temperature), operates from 0.9V to 5.5V supply, and guarantees sub-20µs response time from VCC drop to RESET assertion - critical for deterministic µP initialization in portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 3.6V ±1.5% - ensures consistent reset activation across -40°C to +85°C ambient range |
| Supply Current | 1.0µA typical - enables multi-year operation in coin-cell–powered devices without measurable battery drain |
| Reset Timeout | 220ms (143–297ms) - provides sufficient hold time for slow-ramping power supplies and flash memory initialization |
| Response Time | ≤20µs - guarantees immediate fault capture during rapid VCC collapse, preventing processor lockup |
| Output Type | Open-drain, active-low - supports wired-OR reset bus architecture and flexible pull-up voltage selection up to 5.5V |
| Operating Voltage | 0.9V to 5.5V - accommodates single-cell Li-ion, 3.3V logic rails, and legacy 5V systems |
| Package | SOT25 (5-pin) - provides GND, VCC, RESET, and two NC pins for mechanical stability and layout flexibility |
Pinout & Package
SOT25 package: 5-pin surface-mount plastic package with exposed thermal pad (θJA = 200°C/W); pin 1 = VCC, pin 2 = RESET, pin 3 = GND, pins 4–5 = No Connection (NC). Designed for automated placement and reflow compatibility per JEDEC MS-012.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input - powers internal comparator and reference; must be decoupled with ≥100nF capacitor |
| 2 | RESET | Active-low open-drain output - sinks up to 20mA; requires external pull-up to system VDD |
| 3 | GND | Analog and digital ground reference - must connect to low-impedance system ground plane |
| 4, 5 | NC | No internal connection - may be left floating or tied to GND for mechanical reinforcement |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.6V threshold | Eliminates external resistor network - reduces BOM count and layout area while guaranteeing ±1.5% tolerance |
| 220ms factory-set delay | Removes need for external RC timing components - improves production consistency and long-term reliability |
| 1µA supply current | Enables integration into always-on monitoring paths without compromising ultra-low-power sleep modes |
| Open-drain RESET output | Allows shared reset bus across multiple ICs and supports mixed-voltage system architectures |
| SOT25 package | Provides mechanical robustness and thermal performance superior to 3-pin SOT23 variants in high-density PCB layouts |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered glucose meters and pulse oximeters requiring guaranteed boot integrity after cold start or battery replacement. IC Role / Device Role / Timing Role: Voltage supervisor asserting reset until regulated 3.3V rail stabilizes above 3.6V threshold with 220ms hold time. Use Value: Prevents firmware execution on marginal voltage - eliminates corrupted sensor readings and false alarms during power ramp-up. |
Use Scenario: DIN-rail mounted programmable logic controllers where field-replaceable I/O cards must initialize synchronously after main 24V supply stabilization. IC Role / Device Role / Timing Role: Supervisory IC generating system-wide reset pulse upon 3.6V auxiliary rail validation, coordinated with 220ms timeout. Use Value: Ensures deterministic state machine startup across distributed modules - avoids race conditions and communication faults at power-on. |
| Smart Energy Meters | Automotive Body Control Units |
|
Use Scenario: Revenue-grade electricity meters operating from split-phase AC with isolated DC/DC converters powering MCU subsystems. IC Role / Device Role / Timing Role: Monitors 3.6V bias rail derived from isolated flyback converter; asserts open-drain RESET until stable. Use Value: Guarantees EEPROM write protection and RTC initialization before metering firmware loads - preserving calibration data integrity. |
Use Scenario: Low-power body control modules (BCM) managing door locks and lighting, powered via automotive 12V battery with wide transient range. IC Role / Device Role / Timing Role: Detects brownout events below 3.6V on 5V LDO output; holds MCU in reset until full recovery with hysteresis margin. Use Value: Prevents partial execution during load-dump transients - avoids unintended actuator activation and CAN bus arbitration errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX803L20-36SA-7 | Same 3.6V threshold and 220ms delay, but in 3-pin SOT23 package (no NC pins) | Lacks mechanical stability and thermal margin of SOT25; unsuitable for high-vibration environments | Select when board space is constrained and thermal load is minimal |
| TLV803E36DBVR | 3.6V threshold, 200ms delay, 0.5µA supply current, but only ±2.5% accuracy and no hysteresis spec | Lower accuracy increases risk of spurious resets near threshold; lacks guaranteed hysteresis for noise immunity | Choose only if ultra-low current dominates over precision and noise resilience requirements |
Compared with APX803L20-36SA-7, the W5 variant offers superior thermal performance and mounting reliability; versus TLV803E36DBVR, it delivers tighter threshold accuracy and defined hysteresis - both critical for mission-critical power sequencing in industrial and medical systems.
Availability
APX803L20-36W5-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart energy meters, and automotive body control units requiring stable component supply and long-lifecycle support.
Supply support for APX803L20-36W5-7 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 manufacturer specializing in discrete, analog, and mixed-signal solutions, with design centers in Asia, Europe, and the U.S., serving industrial, computing, and consumer markets.
The APX803L series targets ultra-low-power supervisory functions in battery-operated and energy-sensitive systems, emphasizing precision thresholding, minimal quiescent current, and robust reset timing - directly addressing µP boot integrity challenges.
FAQ
What is the exact reset threshold voltage and tolerance for APX803L20-36W5-7?
The APX803L20-36W5-7 has a nominal reset threshold of 3.6V with ±1.5% accuracy over temperature (–40°C to +85°C), meaning the actual trip point falls between 3.546V and 3.654V under specified operating conditions per DS38171 Rev. 3-2.
Can APX803L20-36W5-7 drive a 10kΩ pull-up resistor to 5V?
Yes - its open-drain RESET output guarantees ≤0.4V low-level voltage at 3.5mA sink current, so with a 10kΩ pull-up to 5V, the output will switch cleanly between <0.4V (asserted) and 5V (released), well within standard CMOS logic thresholds.
Is the 220ms reset timeout affected by temperature or supply voltage?
Yes - the datasheet specifies the timeout varies from 143ms (min) to 297ms (max) across –40°C to +125°C, with minimal dependence on VCC; this variation is fully characterized and included in timing margin calculations for system-level reset hold requirements.
Are pins 4 and 5 in the SOT25 package required to be grounded?
No - pins 4 and 5 are No Connect (NC) terminals with no internal bonding; they may be left unconnected or tied to GND solely for mechanical reinforcement or improved solder joint reliability, but grounding is not electrically necessary.
APX803L20-36W5-7 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:
- 3.6V
- 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
APX803L20-36W5-7 FAQ
1.How can I place an order for APX803L20-36W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-36W5-7 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 APX803L20-36W5-7 reliable?
The price and inventory of APX803L20-36W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-36W5-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-36W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-36W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-36W5-7?
APX803L20-36W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-36W5-7 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 APX803L20-36W5-7?
For technical support, including APX803L20-36W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-36W5-7 requirements.
6.How does Aetrix verify that APX803L20-36W5-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-36W5-7 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 APX803L20-36W5-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-36W5-7?
All APX803L20-36W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-36W5-7, 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 APX803L20-36W5-7 part is unused and in its original packaging.
Return procedure for APX803L20-36W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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MIC826SYMT-TR
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