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Diodes Incorporated APX803L20-19W5-7
- Part No.:
- APX803L20-19W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
APX803L20-19W5-7.pdf
- Description:
- Reset Generator SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:4,877
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Product details
Overview
APX803L20-19W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply integrity in embedded digital systems. It features a fixed 1.9V detection threshold, ±1.5% accuracy, 1µA typical supply current, 220ms reset timeout, and open-drain active-low RESET output in SOT25 package - deployed in battery-powered instrumentation and portable microcontroller-based devices.
For engineers reviewing the APX803L20-19W5-7 datasheet, APX803L20-19W5-7 pinout, APX803L20-19W5-7 application, or APX803L20-19W5-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, low-quiescent-current operation under brown-out conditions, and compatibility with 3-pin SOT25 footprint layouts requiring no external components.
Technical Context
The APX803L20-19W5-7 implements a precision bandgap-based voltage reference comparator with built-in hysteresis (0.01×VTH) to prevent oscillation during supply recovery. Its internal threshold is factory-trimmed to 1.9V with ±1.5% initial accuracy across -40°C to +85°C ambient range.
Reset assertion occurs within 20µs of VCC falling below 1.9V, and remains active until VCC exceeds 1.9V by ≥1.5% (i.e., ~1.9285V), with a guaranteed 220ms timeout period (143–297ms min–max) before release - ensuring reliable processor initialization in power-up sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 1.9V ±1.5% - precise brown-out detection point for 2.0V nominal rails |
| Supply Current | 1.0µA typical - enables multi-year operation on coin-cell batteries |
| Reset Timeout | 220ms nominal (143–297ms) - ensures sufficient hold time for µP boot sequence |
| Response Time | ≤20µs - fast fault capture prevents logic corruption during transient dips |
| Output Type | Open-drain, active-low - supports wired-OR reset bus and flexible pull-up voltage selection |
| Operating Voltage | 0.9V to 5.5V - functional down to sub-1V supply, compatible with Li-ion and 3.3V/5V systems |
| Temperature Range | -40°C to +85°C - qualified for industrial and portable consumer environments |
Pinout & Package
SOT25 (5-pin) package with 3 functional terminals and 2 NC pins; compact 2.9mm × 2.8mm footprint, 1.45mm height, and standard JEDEC-compliant lead pitch (0.95mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage |
| 2 | RESET | Open-drain active-low reset signal output; requires external pull-up |
| 3 | VCC | Power supply input; powers internal circuitry and sets operating voltage range |
| 4, 5 | NC | No connection - electrically isolated, must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0µA typ. - eliminates measurable impact on battery runtime in always-on monitoring |
| Factory-fixed threshold | 1.9V with ±1.5% accuracy - eliminates external resistor network and calibration effort |
| Built-in reset delay | 220ms nominal timeout - replaces RC timing circuit, improves board-level reliability |
| Fast response time | ≤20µs detection-to-assertion - captures short-duration supply glitches missed by slower supervisors |
| RoHS-compliant & halogen-free | Lead-free, <900ppm Br+Cl, <1000ppm Sb - meets global environmental compliance mandates |
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: Monitors 2.0V regulated rail; asserts RESET if voltage sags below 1.9V during RF burst, preventing corrupted sensor data writes. Use Value: 1µA supply current extends battery life beyond 2 years; 220ms timeout ensures full MCU reset before next measurement cycle. |
Use Scenario: DIN-rail mounted I/O expansion module with isolated 3.3V logic supply. IC Role / Device Role / Timing Role: Supervises FPGA configuration voltage; holds system in reset until 3.3V rail stabilizes post-power-up, avoiding partial configuration lockup. Use Value: ±1.5% threshold accuracy guarantees consistent trip point across temperature; open-drain output interfaces directly with FPGA's active-low PROG_B pin. |
| Smart Home Hub Controllers | Automotive Body Control Units |
Use Scenario: Wi-Fi-enabled home automation hub using dual-supply (1.8V core / 3.3V I/O) architecture. IC Role / Device Role / Timing Role: Detects brown-out on 3.3V I/O rail; generates clean reset pulse to ARM Cortex-M4 to prevent peripheral register corruption. Use Value: 20µs response time captures brief line transients from switching power supplies; SOT25 footprint allows placement near power entry point. |
Use Scenario: Non-safety-critical lighting control module in 12V automotive electrical system with LDO-regulated 5V domain. IC Role / Device Role / Timing Role: Supervises 5V microcontroller supply; asserts reset during cold-crank voltage dip (<6V), ensuring deterministic restart after engine start. Use Value: -40°C to +85°C rating matches under-hood thermal profile; 220ms timeout accommodates slow LDO recovery after cranking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EA19DPWR | 1.9V threshold, 200ms delay, 0.6µA ICC, SOT-23-3 package | Smaller 3-pin footprint but lacks NC pins; no SOT25 variant available | Select when board space is constrained and 3-pin layout suffices |
| MAX809SEUR+T | 1.9V threshold, 140ms delay, 12µA ICC, SOT-23-3 | Higher supply current reduces battery life; same 3-pin form factor | Choose only if legacy MAX809 design reuse is required |
Compared with TLV803EA19DPWR and MAX809SEUR+T, the APX803L20-19W5-7 offers superior current efficiency (1µA vs. 0.6µA/12µA) and a 5-pin SOT25 package enabling mechanical decoupling of GND/VCC/RESET traces - critical for noise immunity in high-density PCBs.
Availability
APX803L20-19W5-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub controllers, and automotive body control units requiring stable component supply with long-term manufacturability.
Supply support for APX803L20-19W5-7 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, with emphasis on power management, signal integrity, and protection devices.
The APX803L series belongs to Diodes' µP supervisory product line, engineered specifically for ultra-low-power, high-accuracy voltage monitoring in battery-constrained and thermally demanding embedded applications.
FAQ
What is the exact reset threshold voltage for APX803L20-19W5-7?
The APX803L20-19W5-7 has a factory-trimmed detection threshold of 1.9V with ±1.5% accuracy at +25°C, corresponding to a guaranteed range of 1.8715V to 1.9285V. This value is fixed internally and does not require external resistors or calibration.
Can APX803L20-19W5-7 drive a 10kΩ pull-up resistor to 3.3V?
Yes - the open-drain RESET output can sink up to 20mA (absolute max), and typical VOL is ≤0.4V at 3.5mA sink current. With a 10kΩ pull-up to 3.3V, the output will reliably reach <0.1V logic-low level, satisfying standard CMOS input thresholds.
Does APX803L20-19W5-7 require an external capacitor for stability?
No - the device contains fully integrated hysteresis and timing circuitry. The datasheet specifies zero external components: only VCC, GND, and RESET connections are needed. No bypass capacitor is mandated, though local 100nF ceramic is recommended per best practice.
Is APX803L20-19W5-7 qualified for automotive use?
No - APX803L20-19W5-7 is rated for industrial temperature range (-40°C to +85°C) and is not AEC-Q100 qualified. For automotive applications, Diodes recommends contacting their sales team for PPAP-capable, IATF 16949-manufactured alternatives with extended qualification.
APX803L20-19W5-7 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:
- 1.9V
- 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
APX803L20-19W5-7 FAQ
1.How can I place an order for APX803L20-19W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-19W5-7 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 APX803L20-19W5-7 reliable?
The price and inventory of APX803L20-19W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-19W5-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-19W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-19W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-19W5-7?
APX803L20-19W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-19W5-7 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 APX803L20-19W5-7?
For technical support, including APX803L20-19W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-19W5-7 requirements.
6.How does Aetrix verify that APX803L20-19W5-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-19W5-7 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 APX803L20-19W5-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-19W5-7?
All APX803L20-19W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-19W5-7, 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 APX803L20-19W5-7 part is unused and in its original packaging.
Return procedure for APX803L20-19W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803L20-19W5-7 Tags
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