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Diodes Incorporated APX803L20-24W5-7
- Part No.:
- APX803L20-24W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
APX803L20-24W5-7.pdf
- Description:
- Reset Generator SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:3,581
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Product details
Overview
APX803L20-24W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply levels in embedded and battery-powered systems. It features a fixed 2.4V detection threshold (±1.5% accuracy), 220ms reset timeout, open-drain active-low RESET output, and consumes only 1µA typical supply current. Used in portable instrumentation and low-power microcontroller power sequencing.
For engineers reviewing the APX803L20-24W5-7 datasheet, APX803L20-24W5-7 pinout, APX803L20-24W5-7 application, or APX803L20-24W5-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, open-drain sink capability (3.5mA @ 0.4V), and SOT25 package compatibility with high-density PCB layouts.
Technical Context
The APX803L20-24W5-7 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 active-low open-drain RESET signal when VCC drops below 2.4V and holds it asserted until VCC exceeds the release threshold (2.4V + hysteresis).
Reset timeout is factory-fixed at 220ms (typ.) with ±15% variation across -40°C to +85°C ambient, enabling reliable system initialization timing without external RC components. The device operates from 0.9V to 5.5V supply and supports sink currents up to 20mA on the RESET pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 2.4V ±1.5% - ensures precise brown-out detection for 2.5V/3.3V logic rails |
| Supply Current | 1.0µA (typ.), 2.5µA (max.) - enables multi-year operation in coin-cell–powered IoT sensors |
| Reset Timeout | 220ms (typ.), 143–297ms (min–max) - provides sufficient hold time for µP boot sequence completion |
| Output Type | Open-drain, active-low - allows wired-OR reset bus configuration and flexible pull-up voltage selection |
| Response Time | ≤20µs - guarantees fast fault detection during transient supply dips |
| Operating Temp | -40°C to +85°C - supports industrial-grade deployment in uncontrolled environments |
| Package | SOT25 (5-pin) - delivers thermal resistance of 200°C/W and compact footprint for space-constrained designs |
Pinout & Package
SOT25 is a 5-pin surface-mount package with exposed pad for thermal enhancement; pin 4 and 5 are no-connect (NC) terminals, not functional.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal circuitry and RESET output sink path |
| 2 | RESET | Open-drain active-low reset output; requires external pull-up to define logic-high level |
| 3 | VCC | Power supply input; powers internal reference, comparator, and output stage |
| 4 | NC | No connection - must be left floating or tied to GND per layout best practice |
| 5 | NC | No connection - must be left floating or tied to GND per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Fixed threshold accuracy | ±1.5% over temperature - eliminates need for calibration in production test |
| Ultra-low quiescent current | 1µA typical - reduces standby power loss by >95% vs. legacy reset ICs |
| Hysteresis control | 0.01×VTH - prevents chatter during slow-rising/falling supply transitions |
| Factory-set delay | 220ms - removes external timing capacitor and associated component tolerance risk |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose meters requiring guaranteed reset assertion during Li-ion cell voltage sag below 2.4V. IC Role / Device Role / Timing Role: Voltage supervisor triggering hard reset of ARM Cortex-M0+ MCU upon undervoltage condition. Use Value: Prevents corrupted EEPROM writes and firmware lockup during battery depletion, extending field reliability. | Use Scenario: DIN-rail mounted programmable logic controller with isolated 3.3V I/O supply monitored for brown-out events. IC Role / Device Role / Timing Role: Supervisory IC asserting RESET to FPGA configuration logic when 3.3V rail falls below 2.4V. Use Value: Ensures deterministic reconfiguration after power recovery, eliminating metastability in digital I/O state machines. |
| Smart Home Hub Power Management | Automotive Body Control Module (BCM) |
Use Scenario: Wi-Fi-enabled home automation hub using dual-supply (1.8V/3.3V) architecture with shared reset coordination. IC Role / Device Role / Timing Role: Primary VCC monitor for 3.3V domain, driving common reset net shared with PMIC and wireless SoC. Use Value: Synchronizes reset timing across subsystems, avoiding race conditions during cold start or wake-from-sleep transitions. | Use Scenario: Non-safety-critical BCM subassembly monitoring 5V auxiliary supply derived from vehicle battery. IC Role / Device Role / Timing Role: Standalone reset generator for microcontroller subsystem operating from regulated 5V rail. Use Value: Provides AEC-Q200–compatible supervision (with external qualification) without adding BOM cost of automotive-grade alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX803L20-24SA-7 | SOT23-3 package; identical 2.4V threshold and 220ms delay; 3-pin layout lacks NC pins | Requires different PCB footprint; lower thermal resistance (200°C/W) but no NC pins for grounding flexibility | Select when board space is constrained and thermal performance is prioritized over layout symmetry |
| TLV803EB24DBVR | Texas Instruments part; same 2.4V threshold, 200ms delay (±10%), 0.9µA supply current; SOT23-3 | Higher accuracy (±0.5%) but no factory-programmable delay variants; requires external pull-up resistor | Choose for tighter threshold tolerance in precision analog subsystems where delay variation <10% is critical |
Compared with APX803L20-24W5-7, the SA variant saves board area but sacrifices NC pin utility for noise suppression, while TLV803EB24DBVR offers superior accuracy at the cost of reduced delay option flexibility and non-drop-in package compatibility.
Availability
APX803L20-24W5-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub power management, and automotive body control module (BCM) applications requiring stable component supply across extended product lifecycles.
Supply support for APX803L20-24W5-7 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 design centers in Asia, Europe, and the U.S., serving industrial, computing, consumer, and communications markets.
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 minimum operating voltage for APX803L20-24W5-7?
The APX803L20-24W5-7 operates down to 0.9V supply voltage, enabling functionality during deep brown-out conditions before complete system shutdown. This allows early reset assertion even as VCC decays below nominal 2.4V threshold, ensuring deterministic behavior in low-voltage transients.
Can APX803L20-24W5-7 drive a 10kΩ pull-up resistor reliably?
Yes - with VOL ≤0.4V at ISINK = 3.5mA, the APX803L20-24W5-7 can fully saturate against a 10kΩ pull-up to 3.3V (resulting in ~0.33mA sink current), delivering robust logic-low margin (>2.9V high-state noise immunity) across temperature and process variation.
Does the 220ms reset timeout vary with supply voltage?
No - the 220ms timeout is internally generated and independent of VCC within the 0.9V–5.5V operating range. Electrical characteristics data confirms tDELAY remains stable across VCC = 1.02×VTH to 5.5V, with variation driven solely by temperature (±15% from -40°C to +85°C).
Are pins 4 and 5 on the SOT25 package required to be grounded?
Pins 4 and 5 are NC (no-connect) and must not be bonded to any signal. Diodes Incorporated recommends leaving them floating or connecting both to GND via short traces to improve mechanical stability and reduce EMI susceptibility - neither connection affects electrical function.
APX803L20-24W5-7 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:
- 2.4V
- 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
APX803L20-24W5-7 FAQ
1.How can I place an order for APX803L20-24W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-24W5-7 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 APX803L20-24W5-7 reliable?
The price and inventory of APX803L20-24W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-24W5-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-24W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-24W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-24W5-7?
APX803L20-24W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-24W5-7 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 APX803L20-24W5-7?
For technical support, including APX803L20-24W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-24W5-7 requirements.
6.How does Aetrix verify that APX803L20-24W5-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-24W5-7 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 APX803L20-24W5-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-24W5-7?
All APX803L20-24W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-24W5-7, 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 APX803L20-24W5-7 part is unused and in its original packaging.
Return procedure for APX803L20-24W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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