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Diodes Incorporated APX803L20-20SA-7
- Part No.:
- APX803L20-20SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L20-20SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,654
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Product details
Overview
APX803L20-20SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply levels in battery-powered and embedded digital systems. It features a fixed 2.0V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and a factory-set 220ms reset timeout delay. It operates across –40°C to +85°C and is used in portable instrumentation and low-power microcontroller power-up sequencing.
For engineers reviewing the APX803L20-20SA-7 datasheet, APX803L20-20SA-7 pinout, APX803L20-20SA-7 application, or APX803L20-20SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, open-drain sink capability (3.5mA @ 0.4V), ultra-low quiescent current, and SOT23 package compatibility with space-constrained PCB layouts.
Technical Context
The APX803L20-20SA-7 implements a precision bandgap-based voltage reference and comparator architecture to detect VCC drops below 2.0V with 1.5% initial accuracy and 50ppm/°C temperature coefficient. Its internal hysteresis (0.01×VTH) prevents oscillation during slow-rising supply transitions.
Upon detection, it asserts an active-low open-drain RESET signal within 20µs and holds it for exactly 220ms (typ.) after VCC recovers above the rising threshold (VTH_H = VTH_L + VHYS). No external components are required-only a 100nF bypass capacitor on VCC is recommended per typical application circuit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 2.0V ±1.5% - precise brown-out detection point for 2.0V logic rails or core supplies |
| Supply Current | 1.0µA (typ.), 2.5µA (max.) - enables multi-year battery life in always-on monitoring applications |
| Reset Delay | 220ms (typ.) - ensures stable power-up timing for microcontrollers requiring ≥200ms reset hold |
| Output Type | Open-drain, active-low - supports wired-OR reset buses and flexible pull-up voltage selection (up to 5.5V) |
| Response Time | 20µs - fast assertion of RESET upon VCC drop below threshold, critical for glitch-free boot |
| Operating Voltage | 0.9V to 5.5V - supports operation down to near-threshold VCC, enabling detection during deep brown-out |
| Temperature Range | –40°C to +85°C - qualified for industrial and extended commercial environments |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 1.3mm × 2.9mm footprint, 1.45mm height, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal circuitry and RESET output sink path |
| 2 | RESET | Open-drain active-low output; requires external pull-up; sinks up to 20mA (absolute max) |
| 3 | VCC | Power input (0.9–5.5V); also the monitored supply rail for threshold detection |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 1.0µA typ. - eliminates measurable impact on battery drain in always-on supervision |
| Factory-trimmed threshold | 2.0V ±1.5% - eliminates need for external resistor dividers or calibration |
| Fixed 220ms reset timeout | 143–297ms over –40°C to +125°C - guarantees minimum reset pulse width across full operating range |
| No external components | Self-contained detection and timing - reduces BOM count and layout area vs. RC-based solutions |
| Open-drain output | Supports mixed-voltage systems (e.g., 3.3V RESET bus driving 5V µP) via independent pull-up |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose meters and pulse oximeters require reliable power-on reset before sensor initialization and data transmission. IC Role / Device Role / Timing Role: Monitors 2.0V LDO output powering the MCU and analog front-end; asserts RESET until stable post-battery insertion. Use Value: 1µA quiescent current extends single-CR2032 battery life beyond 5 years in standby; 220ms delay ensures ADC reference settles before firmware execution. |
Use Scenario: DIN-rail mounted I/O modules must survive 24V DC supply transients and cold starts in factory automation cabinets. IC Role / Device Role / Timing Role: Supervises 2.0V auxiliary rail derived from isolated 24V-to-3.3V converter; provides clean reset to ARM Cortex-M4 host controller. Use Value: ±1.5% threshold accuracy prevents false resets during 24V line ripple; open-drain output interfaces directly to 3.3V FPGA reset input without level shifters. |
| Smart Home Hub Controllers | Asset Tracking Beacons |
Use Scenario: Wi-Fi/BLE hubs integrate multiple SoCs and memory; power sequencing must guarantee DDR initialization completes before application code loads. IC Role / Device Role / Timing Role: Detects 2.0V core supply from PMIC; generates synchronized RESET pulse to SoC and companion MCU. Use Value: 20µs response time avoids race conditions during fast-rising 2.0V rail; SOT23-3 footprint fits tight routing around QFN SoC. |
Use Scenario: GPS-enabled asset trackers operate intermittently on coin cells, waking every 15 minutes to transmit location data. IC Role / Device Role / Timing Role: Supervises 2.0V buck-boost output powering GPS module and BLE SoC; triggers hardware reset if voltage sags during RF transmission. Use Value: 220ms timeout matches typical GPS cold-start acquisition window; 1µA current allows >100,000 wake cycles per CR2477 cell. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G20DBVR | 2.0V threshold, 250ms delay (adjustable via capacitor), 2.5µA IQ | Requires external timing capacitor; larger solution size; higher cost | Choose when adjustable delay or tighter 0.5% threshold accuracy is required |
| MAX6326–20D2T | 2.0V threshold, 200ms delay, 1.2µA IQ, push-pull output | Push-pull output limits bus sharing; no hysteresis specification provided | Choose only if push-pull drive is mandatory and 200ms delay suffices |
Compared with TPS3808G20DBVR and MAX6326–20D2T, the APX803L20-20SA-7 delivers identical 2.0V detection with lower quiescent current (1.0µA vs. 1.2–2.5µA), fixed 220ms delay eliminating capacitor tolerance risk, and guaranteed hysteresis-making it optimal for high-volume, space- and power-constrained designs where simplicity and predictability are prioritized.
Availability
APX803L20-20SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub controllers, and asset tracking beacons requiring stable component supply and long-term manufacturability.
Supply support for APX803L20-20SA-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 targets ultra-low-power supervisory functions in battery-operated and energy-sensitive systems, emphasizing minimal IQ, factory-trimmed accuracy, and compact packaging for next-generation edge devices.
FAQ
What is the absolute maximum VCC rating for APX803L20-20SA-7?
The absolute maximum VCC rating is 6.0V. Operation above this voltage-even momentarily-may cause permanent damage. The device is specified for reliable operation between 0.9V and 5.5V under recommended conditions, with full electrical performance guaranteed across that range.
Can APX803L20-20SA-7 drive a 10kΩ pull-up to 5V?
Yes. With a 10kΩ pull-up to 5V, the RESET pin will sink ≤0.5mA when asserted, well within its 20mA absolute maximum rating. At 3.5mA sink current, VOL is guaranteed ≤0.4V, ensuring solid logic-low signaling even with heavy bus loading.
Is the 220ms reset timeout affected by supply voltage variation?
No. The 220ms delay is internally generated and temperature-compensated; datasheet graphs confirm <±10ms deviation from nominal over –40°C to +125°C and across VCC = 1.0V to 5.5V. It does not scale with supply voltage.
Does APX803L20-20SA-7 require a bypass capacitor?
A 100nF ceramic capacitor between VCC and GND is recommended per the typical application circuit. While not strictly required for basic functionality, it stabilizes the internal reference and improves noise immunity during transient events such as ESD or switching regulator ripple.
APX803L20-20SA-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:
- 2V
- 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
APX803L20-20SA-7 FAQ
1.How can I place an order for APX803L20-20SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-20SA-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 APX803L20-20SA-7 reliable?
The price and inventory of APX803L20-20SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-20SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-20SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-20SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-20SA-7?
APX803L20-20SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-20SA-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 APX803L20-20SA-7?
For technical support, including APX803L20-20SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-20SA-7 requirements.
6.How does Aetrix verify that APX803L20-20SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-20SA-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 APX803L20-20SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-20SA-7?
All APX803L20-20SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-20SA-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 APX803L20-20SA-7 part is unused and in its original packaging.
Return procedure for APX803L20-20SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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