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Diodes Incorporated APX803L20-30SR-7
- Part No.:
- APX803L20-30SR-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L20-30SR-7.pdf
- Description:
- RESET GENERATOR SOT23 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:3,703
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Product details
Overview
APX803L20-30SR-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 3.0V threshold detection with ±1.5% accuracy, 1µA typical supply current, 220ms reset timeout, and open-drain active-low RESET output in SOT23R package - used in battery-powered IoT sensors and portable medical monitors to ensure reliable power-on reset sequencing.
For engineers reviewing the APX803L20-30SR-7 datasheet, APX803L20-30SR-7 pinout, APX803L20-30SR-7 application, or APX803L20-30SR-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, low-quiescent-current operation in sleep mode, and compatibility with 1.8V–5.5V supply rails in space-constrained embedded systems.
Technical Context
The APX803L20-30SR-7 integrates a precision bandgap reference, comparator with hysteresis (0.01×VTH), and internal timing capacitor to deliver fixed 220ms reset assertion after VCC drop below 3.0V. It operates across -40°C to +85°C ambient with 50ppm/°C threshold drift.
Its open-drain RESET output sinks up to 20mA at 0.4V max VOL under 3.5mA load, enabling direct interface with µP reset inputs without external pull-up resistors - eliminating BOM cost and board area while maintaining noise immunity in mixed-signal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.0V ±1.5% - ensures deterministic reset initiation at defined system brown-out level |
| Supply Current | 1.0µA typical - enables multi-year battery life in always-on monitoring devices |
| Reset Timeout | 220ms (143–297ms range) - guarantees sufficient hold time for µP initialization and clock stabilization |
| Output Type | Open-drain, active-low - supports wired-OR reset bus and flexible pull-up voltage selection |
| Response Time | 20µs max VCC drop-to-reset - prevents spurious resets during transient supply dips |
| Operating Voltage | 0.9V to 5.5V - compatible with Li-ion, coin-cell, and 3.3V/5V logic domains |
| Threshold Hysteresis | 0.01×VTH - suppresses chatter near trip point during slow-rising VCC |
Pinout & Package
SOT23R (3-pin) package: ultra-compact 2.9mm × 1.6mm footprint with 0.95mm height, optimized for high-density PCB layouts in wearables and edge nodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground return path for internal comparator and output stage |
| 2 | RESET | Open-drain output; pulled low when VCC < 3.0V, high-impedance otherwise |
| 3 | VCC | Power input pin; supplies internal circuitry and sets detection reference |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated timing capacitor and reference eliminate need for external R/C network, reducing bill-of-materials and layout complexity |
| High threshold accuracy | ±1.5% over temperature ensures consistent reset behavior across industrial operating range (-40°C to +85°C) |
| Ultra-low quiescent current | 1.0µA typical draw extends battery service life in energy-harvesting and coin-cell applications |
| Fast response time | 20µs detection-to-output delay prevents missed resets during rapid supply collapse |
| RoHS-compliant & halogen-free | Fully lead-free, antimony-free, and <900ppm Br+Cl - meets global environmental compliance requirements |
Applications
| Smart Wearable Sensors | Portable Medical Monitors |
|---|---|
Use Scenario: Continuous ECG/SpO₂ sensing powered by CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET until regulated 3.0V rail stabilizes post-battery insertion or cold start. Use Value: Prevents firmware execution before ADC reference and RF transceiver power rails settle, eliminating data corruption and radio lockup. |
Use Scenario: Handheld glucose meter with auto-power-down and wake-on-button press. IC Role / Device Role / Timing Role: Ensures µC remains held in reset until LDO output reaches 3.0V ±1.5%, guaranteeing clean boot sequence. Use Value: Eliminates erratic display initialization and sensor calibration errors caused by marginal supply conditions. |
| Industrial IoT Edge Nodes | Low-Power Asset Trackers |
Use Scenario: LoRaWAN node harvesting energy from solar film, storing charge in supercapacitor. IC Role / Device Role / Timing Role: Monitors rising VCC from storage element and releases RESET only after crossing 3.0V with 220ms debounce. Use Value: Avoids premature MCU wake-up during capacitor charging ramp, conserving stored energy and extending operational uptime. |
Use Scenario: GPS tracker in logistics pallet with intermittent GNSS acquisition and GSM burst transmission. IC Role / Device Role / Timing Role: Provides guaranteed 220ms reset pulse to clear µC state after Li-SOCl₂ battery voltage recovery from load-induced sag. Use Value: Prevents firmware hang due to incomplete register initialization following deep discharge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EA30DBVR | 3.0V threshold, ±2.5% accuracy, 350ms default delay, SOT23-3 package | Higher threshold tolerance and longer fixed delay reduce suitability for tight-margin 3.0V systems requiring fast release | Select when longer reset hold time is acceptable and higher accuracy is not critical |
| MAX809SEUR+T | 3.0V threshold, ±2.0% accuracy, 240ms min delay, SOT23-3 package, 2.0µA ICC | Higher supply current and looser threshold spec impact battery lifetime and reset consistency in precision applications | Choose only if legacy MAX809 footprint compatibility is mandatory and 1µA current is not required |
Compared with TLV803EA30DBVR and MAX809SEUR+T, the APX803L20-30SR-7 delivers tighter threshold accuracy (±1.5% vs. ±2.0–2.5%), lower quiescent current (1µA vs. 2–3µA), and more stable 220ms delay across temperature - making it optimal for long-life, high-reliability battery-powered designs where reset timing predictability is critical.
Availability
APX803L20-30SR-7 is available at Aetrix Electronics and suitable for smart wearables, portable medical monitors, and industrial IoT edge nodes requiring stable component supply, full traceability, and lifecycle continuity support.
Supply support for APX803L20-30SR-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 for power management, signal integrity, and connectivity applications.
The APX803L series belongs to Diodes' precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy reset generation in battery-critical and space-constrained embedded systems.
FAQ
What is the exact reset threshold voltage for APX803L20-30SR-7?
The APX803L20-30SR-7 has a nominal reset threshold of 3.0V with guaranteed accuracy of ±1.5% over -40°C to +85°C ambient temperature, corresponding to a 2.955V to 3.045V range at +25°C per datasheet DS38171 Rev. 3-2 Section 5.
Does APX803L20-30SR-7 require an external pull-up resistor on the RESET pin?
Yes - the RESET pin is open-drain and requires an external pull-up resistor to a valid logic-high voltage (e.g., 1.8V, 3.3V, or 5V) to generate a high-level signal when not asserted; typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements.
Can APX803L20-30SR-7 operate from a 1.2V supply rail?
No - the minimum recommended operating supply voltage is 0.9V, but functional reset detection requires VCC ≥ 1.02×VTH = 3.06V for release; below 3.06V, the device remains in reset and cannot monitor or respond to supply changes.
Is APX803L20-30SR-7 qualified for automotive applications?
No - APX803L20-30SR-7 is not AEC-Q100 qualified; Diodes offers automotive-grade variants (e.g., APX803L20-30QSA-7) with PPAP capability, IATF 16949 manufacturing, and extended temperature screening - contact Diodes directly for qualified alternatives.
APX803L20-30SR-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:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3V
- 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:
- SOT23R
APX803L20-30SR-7 FAQ
1.How can I place an order for APX803L20-30SR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-30SR-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 APX803L20-30SR-7 reliable?
The price and inventory of APX803L20-30SR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-30SR-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-30SR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-30SR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-30SR-7?
APX803L20-30SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-30SR-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 APX803L20-30SR-7?
For technical support, including APX803L20-30SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-30SR-7 requirements.
6.How does Aetrix verify that APX803L20-30SR-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-30SR-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 APX803L20-30SR-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-30SR-7?
All APX803L20-30SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-30SR-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 APX803L20-30SR-7 part is unused and in its original packaging.
Return procedure for APX803L20-30SR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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