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Diodes Incorporated APX803L20-50SA-7
- Part No.:
- APX803L20-50SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L20-50SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
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Product details
Overview
APX803L20-50SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply levels in embedded digital systems. It features a fixed 5.0V detection threshold with ±1.5% accuracy, 1µA typical supply current, 220ms reset timeout, and open-drain active-low RESET output in SOT23-3 package - deployed in battery-powered instrumentation and portable microcontroller systems.
For engineers reviewing the APX803L20-50SA-7 datasheet, APX803L20-50SA-7 pinout, APX803L20-50SA-7 application, or APX803L20-50SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, low-quiescent-current operation in sleep-mode systems, and compatibility with 3.3V/5V logic-level microprocessor reset inputs.
Technical Context
The APX803L20-50SA-7 implements a precision bandgap-based voltage reference with hysteresis (0.01×VTH) to prevent oscillation during supply ramp-up/down. Its internal comparator triggers an open-drain RESET signal when VCC falls below 5.0V and holds it active for 220ms after recovery above threshold.
It operates across –40°C to +85°C ambient, supports 0.9V–5.5V supply range, and delivers 20μs response time from VCC drop to RESET assertion. The device requires no external components and integrates thermal shutdown protection per absolute maximum ratings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 5.0V ±1.5% - ensures reliable reset initiation at nominal 5V rail without false triggering near regulation limits |
| Supply Current | 1.0µA typical - enables multi-year battery life in always-on monitoring applications like IoT sensors |
| Reset Timeout | 220ms (typ.) - provides sufficient hold time for full µP initialization and peripheral stabilization |
| Response Time | 20µs - guarantees rapid fault detection before system state corruption occurs |
| Output Type | Open-drain, active-low - allows wired-OR reset bus configuration and compatibility with 1.8V–5.5V logic families |
| Operating Temp | –40°C to +85°C - validated for industrial-grade embedded control and portable equipment environments |
| Hysteresis | 0.01×VTH (50mV) - prevents chatter during slow VCC recovery by enforcing 5.05V release threshold |
Pinout & Package
SOT23-3 surface-mount package (2.9mm × 1.3mm × 1.0mm), RoHS-compliant, lead-free, halogen-free "Green" construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Return path for internal reference and comparator; must be low-impedance connection to system ground plane |
| 2 (RESET) | Open-Drain Reset Output | Active-low signal asserted when VCC < 5.0V; requires external pull-up resistor to host logic rail (e.g., 10kΩ to 3.3V) |
| 3 (VCC) | Supply Input | Monitored power rail input; supports 0.9V–5.5V operation; decoupling capacitor (100nF) recommended at pin |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0µA typ. - eliminates measurable impact on standby power budget in energy-harvesting or coin-cell systems |
| Precision threshold accuracy | ±1.5% over temperature - reduces need for margin-based design derating in 5V supply monitoring |
| Factory-set delay option | 220ms fixed timeout - eliminates external RC timing network and associated component tolerance drift |
| No external components required | Self-contained detection circuit - simplifies BOM, PCB layout, and qualification testing for high-reliability designs |
| Wide supply voltage range | 0.9V to 5.5V - supports direct monitoring of Li-ion battery rails (2.7–4.2V) and regulated 3.3V/5V domains |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET during battery sag below 5.0V to prevent firmware crash during RF burst. Use Value: 1µA supply current extends battery life beyond 2 years; 220ms timeout ensures complete BLE stack reinitialization post-reset. |
Use Scenario: DIN-rail mounted programmable logic controller with isolated 5V backplane supply. IC Role / Device Role / Timing Role: Monitors 5V logic rail integrity and forces controlled µC reboot upon undervoltage event. Use Value: ±1.5% threshold accuracy avoids nuisance resets during transient load steps; open-drain output interfaces directly to optocoupled reset chain. |
| Smart Home Hub Controllers | Automotive Body Control Modules (Non-AEC-Q) |
Use Scenario: Wi-Fi-enabled home automation hub using dual-rail 3.3V/5V power architecture. IC Role / Device Role / Timing Role: Supervises 5V USB-derived rail feeding Ethernet PHY and USB peripherals. Use Value: 20µs response time prevents packet loss during brownout; SOT23-3 footprint minimizes board space in compact enclosure. |
Use Scenario: Aftermarket dashboard display module powered from vehicle's 12V-to-5V DC/DC converter. IC Role / Device Role / Timing Role: Detects 5V rail collapse during engine cranking and initiates graceful UI shutdown. Use Value: –40°C to +85°C operating range covers under-hood thermal extremes; hysteresis prevents flicker during marginal recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G18DBVR | 1.8V fixed threshold, 200ms delay, 1.1µA IQ, same SOT23-6 package but different pinout | Not suitable for 5V rail monitoring; requires redesign of reset net and PCB layout | Select only if migrating to lower-voltage system architecture |
| MAX809SEUR+T | 5.0V threshold, 140ms delay, 10µA IQ, SOT23-3 pin-compatible but higher supply current | Higher quiescent draw reduces battery life in ultra-low-power designs; same footprint enables drop-in replacement | Prefer when legacy MAX809 qualification is mandated and 10µA IQ is acceptable |
Compared with TPS3808G18DBVR and MAX809SEUR+T, the APX803L20-50SA-7 uniquely balances 5.0V precision supervision, 220ms timing, and sub-µA power - making it optimal for space-constrained, long-life 5V microcontroller systems where both accuracy and efficiency are critical.
Availability
APX803L20-50SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub controllers, and automotive body control modules requiring stable component supply across extended production lifecycles.
Supply support for APX803L20-50SA-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The APX803L series belongs to Diodes' precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy power monitoring in battery-operated and embedded microprocessor systems.
FAQ
What is the exact reset threshold voltage and its tolerance for APX803L20-50SA-7?
The APX803L20-50SA-7 has a factory-trimmed detection threshold of 5.0V with guaranteed accuracy of ±1.5% over –40°C to +85°C ambient temperature. This corresponds to a minimum threshold of 4.925V and maximum of 5.075V at +25°C, and includes 50mV hysteresis to ensure clean release at 5.05V.
Can APX803L20-50SA-7 operate with a 3.3V supply rail?
No - the APX803L20-50SA-7 is configured for 5.0V threshold detection and requires VCC ≥ 0.9V to function, but its specified operating range is 0.9V to 5.5V. While it will power up at 3.3V, it will assert RESET continuously because VCC (3.3V) remains below the 5.0V threshold; it is intended only for monitoring 5V rails.
Is an external pull-up resistor required on the RESET pin?
Yes - the RESET pin is open-drain and active-low, so an external pull-up resistor to the host logic supply (e.g., 3.3V or 5V) is mandatory. Typical values range from 4.7kΩ to 10kΩ; lower values improve noise immunity but increase static current draw during RESET assertion.
Does APX803L20-50SA-7 support AEC-Q200 qualification for automotive use?
No - the APX803L20-50SA-7 is not AEC-Q200 qualified. Diodes Incorporated offers automotive-grade variants (e.g., APX803L20-50SA-7Q) with PPAP capability, IATF 16949 manufacturing, and AEC-Q100 stress testing; this standard part is rated for industrial temperature range only.
APX803L20-50SA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 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-23-3
APX803L20-50SA-7 FAQ
1.How can I place an order for APX803L20-50SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-50SA-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 APX803L20-50SA-7 reliable?
The price and inventory of APX803L20-50SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-50SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-50SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-50SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-50SA-7?
APX803L20-50SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-50SA-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 APX803L20-50SA-7?
For technical support, including APX803L20-50SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-50SA-7 requirements.
6.How does Aetrix verify that APX803L20-50SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-50SA-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 APX803L20-50SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-50SA-7?
All APX803L20-50SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-50SA-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 APX803L20-50SA-7 part is unused and in its original packaging.
Return procedure for APX803L20-50SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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