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Diodes Incorporated APX803L20-41SA-7
- Part No.:
- APX803L20-41SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L20-41SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,975
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Product details
Overview
APX803L20-41SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.0V threshold detection with ±1.5% accuracy, 220ms reset timeout, open-drain active-low RESET output, and 1µA typical supply current. It monitors VCC in battery-powered embedded systems such as portable medical devices, IoT edge nodes, and low-power industrial controllers.
For engineers reviewing the APX803L20-41SA-7 datasheet, APX803L20-41SA-7 pinout, APX803L20-41SA-7 application, or APX803L20-41SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, open-drain drive capability (3.5mA sink), ultra-low ICC, and SOT23 package compatibility with space-constrained PCB layouts.
Technical Context
The APX803L20-41SA-7 implements a precision bandgap-based voltage reference with internal hysteresis (0.01×VTH) to prevent oscillation during VCC recovery. Its comparator architecture triggers reset when VCC falls below 2.0V and holds RESET low until VCC exceeds 2.016V (typical rising threshold).
Reset assertion occurs within 20µs of VCC crossing the falling threshold, and the fixed 220ms timeout (min 143ms, max 297ms across temperature) ensures reliable processor initialization. The device operates from 0.9V to 5.5V supply and supports ambient temperatures from –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 2.0V ±1.5% - guarantees consistent reset activation across production units and temperature range. |
| Supply Current | 1.0µA (typ.), 2.5µA (max) - enables multi-year operation on coin-cell batteries without measurable drain. |
| Reset Timeout | 220ms (typ.), 143–297ms (min–max) - provides sufficient hold time for full µP boot sequence completion. |
| Output Type | Open-drain, active-low - allows wired-OR configuration and flexible pull-up voltage selection (up to 5.5V). |
| Response Time | ≤20µs - ensures rapid fault detection before system state corruption occurs. |
| Operating Voltage | 0.9V to 5.5V - supports direct monitoring of 1.2V, 1.8V, 2.5V, 3.3V, and 5V rails without external biasing. |
| Temperature Range | –40°C to +85°C - validated for industrial-grade reliability in uncontrolled 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 | Return path for internal circuitry and reset output; must be connected to system ground plane for stable threshold accuracy. |
| 2 (RESET) | Open-Drain Reset Output | Active-low signal asserted when VCC < 2.0V; requires external pull-up resistor (typically 10kΩ) to host rail voltage. |
| 3 (VCC) | Supply Input | Monitored power rail input; also powers internal detector circuitry-no separate bias supply needed. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Self-contained detection circuit eliminates BOM cost and layout area for RC timing networks or reference dividers. |
| High threshold accuracy | ±1.5% at +25°C ensures predictable reset behavior without calibration or trimming in production. |
| Low-temperature coefficient | 50 ppm/°C threshold drift minimizes false resets across –40°C to +85°C operating range. |
| Fast response time | 20µs propagation delay enables real-time power fault capture before digital logic state loss. |
| Robust ESD protection | ±4000V HBM rating protects against handling damage during assembly and field service. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered glucose meters and pulse oximeters requiring guaranteed reset on battery voltage sag. IC Role / Device Role / Timing Role: Monitors 3.0V LDO output feeding MCU and analog front-end; asserts RESET if voltage drops below 2.0V due to aging or cold-temperature discharge. Use Value: Prevents corrupted sensor readings or unsafe actuation by ensuring clean MCU restart before firmware execution begins. |
Use Scenario: DIN-rail mounted I/O modules powered from 24VDC converted to 3.3V, subject to brownout during factory line transients. IC Role / Device Role / Timing Role: Supervises 3.3V domain supplying FPGA configuration memory and communication UART; holds RESET for 220ms to allow full re-initialization after transient recovery. Use Value: Eliminates spurious communication errors and configuration lockups caused by marginal supply conditions. |
| Wireless Edge Gateways | Smart Energy Meters |
|
Use Scenario: Cellular/NB-IoT gateways operating on Li-SOCl₂ primary cells with steep discharge curves near end-of-life. IC Role / Device Role / Timing Role: Detects 2.0V threshold on 3.3V regulated rail; open-drain output interfaces directly to modem's WAKE/RESET pin with 3.3V pull-up. Use Value: Enables graceful shutdown and non-volatile state save before complete power loss, preserving last valid telemetry packet. |
Use Scenario: ANSI C12.20-compliant electricity meters using supercapacitor backup during AC mains interruption. IC Role / Device Role / Timing Role: Supervises 3.3V backup rail derived from supercap; triggers hardware reset if voltage decays below 2.0V during extended outage. Use Value: Guarantees metrology ASIC reinitialization upon AC restoration, preventing cumulative kWh counting errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EA20DBVR | 2.0V threshold, 200ms delay, 350nA ICC (lower), SOT23-3 package | Ultra-low ICC suits >10-year battery life designs; tighter 0.5% threshold accuracy but narrower VCC range (1.2V–5.5V) | Select when minimizing quiescent current is critical and tighter threshold tolerance justifies higher unit cost. |
| MAX809SEUR+T | 2.0V threshold, 140ms delay, 12µA ICC (higher), same SOT23-3 footprint | Higher ICC limits use in energy-harvesting systems; wider operating temp (–40°C to +125°C) suits automotive under-hood zones | Select only if extended temperature range is mandatory and higher supply current is acceptable. |
Compared with TLV803EA20DBVR and MAX809SEUR+T, the APX803L20-41SA-7 delivers optimal balance of ultra-low ICC (1µA), industrial-grade temperature support (–40°C to +85°C), and proven long-term reliability in high-volume consumer and industrial deployments-without sacrificing SOT23-3 footprint compatibility.
Availability
APX803L20-41SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and wireless edge gateways requiring stable component supply with guaranteed long-term manufacturability.
Supply support for APX803L20-41SA-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-critical and space-constrained embedded systems.
FAQ
What is the exact reset timeout duration for APX803L20-41SA-7?
The APX803L20-41SA-7 has a nominal reset timeout of 220ms, with a guaranteed minimum of 143ms and maximum of 297ms across the full –40°C to +85°C operating temperature range, as specified in the Electrical Characteristics table of DS38171 Rev. 3-2.
Can APX803L20-41SA-7 monitor a 1.8V supply rail?
No-it is configured for 2.0V threshold detection and cannot reliably supervise 1.8V rails. For 1.8V monitoring, Diodes offers APX803L18-XXSA-7 (1.8V variant); using the 2.0V part would result in premature or missed reset assertion.
Does APX803L20-41SA-7 require an external pull-up resistor on the RESET pin?
Yes-an external pull-up resistor (typically 4.7kΩ to 10kΩ) to the host supply rail (e.g., 3.3V or 5V) is mandatory, as the RESET pin is open-drain and cannot source current. No internal pull-up is integrated.
Is APX803L20-41SA-7 qualified for automotive applications?
No-this specific variant is not AEC-Q100 qualified. Diodes offers automotive-grade versions (e.g., APX803L20-41SA-7Q) with PPAP documentation and IATF 16949 manufacturing; standard APX803L20-41SA-7 is rated for industrial temperature range only.
APX803L20-41SA-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:
- 4.1V
- 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
APX803L20-41SA-7 FAQ
1.How can I place an order for APX803L20-41SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-41SA-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 APX803L20-41SA-7 reliable?
The price and inventory of APX803L20-41SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-41SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-41SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-41SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-41SA-7?
APX803L20-41SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-41SA-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 APX803L20-41SA-7?
For technical support, including APX803L20-41SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-41SA-7 requirements.
6.How does Aetrix verify that APX803L20-41SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-41SA-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 APX803L20-41SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-41SA-7?
All APX803L20-41SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-41SA-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 APX803L20-41SA-7 part is unused and in its original packaging.
Return procedure for APX803L20-41SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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