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Diodes Incorporated APX803L20-12SA-7
- Part No.:
- APX803L20-12SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L20-12SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
APX803L20-12SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 1.2V supply monitoring with ±1.5% threshold accuracy, 1µA typical supply current, 220ms reset timeout, and open-drain active-low RESET output in SOT23 package - used in battery-powered IoT sensors and portable medical devices.
For engineers reviewing the APX803L20-12SA-7 datasheet, APX803L20-12SA-7 pinout, APX803L20-12SA-7 application, or APX803L20-12SA-7 equivalent, key selection criteria include detection voltage tolerance, reset delay stability over temperature, low-quiescent-current operation in sleep mode, and compatibility with 1.2V logic-supply rails in space-constrained embedded systems.
Technical Context
The APX803L20-12SA-7 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 1.2V threshold, with built-in hysteresis (0.01×VTH) preventing oscillation during slow-rising power rails. Its internal reset timer ensures stable 220ms assertion after undervoltage detection.
It operates across –40°C to +85°C ambient, supports 0.9V to 5.5V supply range, and delivers sub-20µs response time from VCC drop to RESET assertion. The open-drain output sinks up to 20mA and requires an external pull-up for system-level reset signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Voltage | 1.2V ±1.5% - enables reliable supervision of 1.2V core logic supplies without external calibration |
| Supply Current | 1.0µA typical - minimizes battery drain in always-on monitoring applications |
| Reset Timeout | 220ms (typ.) - meets JEDEC JESD78 requirements for processor reset hold time |
| Response Time | 20µs max - ensures fast fault capture before system state corruption |
| Output Type | Open-drain, active-low - allows wired-OR reset bus sharing across multiple supervisors |
| Operating Temp | –40°C to +85°C - supports industrial-grade deployment in uncontrolled environments |
| Package | SOT23-3 - 2.9mm × 1.3mm footprint ideal for compact PCB layouts |
Pinout & Package
SOT23-3 package with 1.3mm pitch, 1.3mm height, and moisture sensitivity level (MSL) 1 - compatible with standard reflow profiles and automated pick-and-place.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection to minimize noise coupling |
| 2 | RESET | Open-drain active-low reset signal; requires external pull-up resistor (typically 10kΩ) to host VCC rail |
| 3 | VCC | Power input pin; supplies internal circuitry and sets detection reference - decoupling capacitor (100nF) required at pin |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1.0µA typical supply current enables >10-year battery life in coin-cell-powered wearables |
| Fixed 1.2V Threshold | No external resistors needed - eliminates BOM cost and layout area for voltage-setting network |
| 220ms Reset Delay | Factory-trimmed timeout ensures deterministic reset duration without timing capacitor drift |
| ±1.5% VTH Accuracy | Reduces need for guard-banding in 1.2V supply design margins, improving power efficiency |
| Open-Drain Output | Supports multi-source reset arbitration and mixed-voltage system interfacing (e.g., 1.2V IC driving 3.3V reset line) |
Applications
| Smart Wearable Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous voltage supervision of 1.2V MCU core supply in Bluetooth-enabled fitness trackers operating on CR2032 batteries. IC Role / Device Role / Timing Role: Voltage detector asserting active-low RESET to halt firmware execution during brownout, with 220ms hold time ensuring full register save before power collapse. Use Value: Prevents flash memory corruption and sensor data loss during battery depletion, extending field reliability beyond 2 years. | Use Scenario: Monitoring 1.2V auxiliary supply powering FPGA configuration logic in DIN-rail mounted programmable controllers. IC Role / Device Role / Timing Role: Supervisory IC triggering hardware reset when 1.2V rail drops below 1.182V, synchronizing recovery with watchdog timeout and power-good sequencing. Use Value: Eliminates FPGA configuration lockup during transient grid sags, reducing unplanned downtime in factory automation lines. |
| Portable Medical Monitors | Low-Power Edge AI Cameras |
Use Scenario: Ensuring stable 1.2V supply to ADC and low-noise analog front-end in handheld ECG recorders powered by Li-ion cells. IC Role / Device Role / Timing Role: Precision voltage supervisor detecting sub-10mV threshold deviations to initiate safe shutdown before analog signal integrity degrades. Use Value: Maintains clinical-grade measurement accuracy by preventing operation outside ADC reference voltage spec limits. | Use Scenario: Supervising 1.2V core voltage of vision processor SoC in battery-operated smart doorbell cameras with motion-triggered wake-up. IC Role / Device Role / Timing Role: Micro-power detector enabling immediate reset upon wake-up supply instability, avoiding corrupted inference results from marginal VDD. Use Value: Reduces false-positive motion alerts by ensuring clean boot sequence before neural network accelerator initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803E12DBVR | 1.2V threshold, 200ms delay, 350nA ICC - lower quiescent current but no 220ms option; SOT23-3 pinout identical | Preferred for ultra-long-life coin-cell designs where 20ms delay variation is acceptable | Select TLV803E12DBVR only if <350nA supply current is mandatory and 200ms vs. 220ms delay does not impact system timing budget |
| MAX809SEUR+T | 1.2V threshold, 240ms delay, 12µA ICC - higher supply current, same SOT23-3 footprint and pinout | Suitable for cost-sensitive industrial controls where 12µA ICC is tolerable and 240ms delay aligns with legacy reset timing | Choose MAX809SEUR+T only when backward compatibility with existing MAX809-based schematics is required |
Compared with TLV803E12DBVR and MAX809SEUR+T, the APX803L20-12SA-7 uniquely balances 1µA ICC, exact 220ms delay, and ±1.5% VTH accuracy in a single SOT23-3 device - making it optimal for next-gen portable electronics requiring tight power and timing control.
Availability
APX803L20-12SA-7 is available at Aetrix Electronics and suitable for smart wearable sensors, portable medical monitors, and low-power edge AI cameras requiring stable component supply with guaranteed long-term manufacturability.
Supply support for APX803L20-12SA-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' µP supervisory product line, engineered specifically for high-accuracy, ultra-low-power voltage monitoring in battery-critical and space-constrained embedded systems.
FAQ
What is the minimum operating voltage for APX803L20-12SA-7?
The APX803L20-12SA-7 operates down to 0.9V supply voltage while maintaining valid 1.2V threshold detection - verified per Recommended Operating Conditions in DS38171 Rev. 3-2. Below 0.9V, internal biasing fails and RESET behavior becomes undefined; system designers must ensure VCC remains ≥0.9V during brownout recovery.
Can APX803L20-12SA-7 drive a 10kΩ pull-up directly?
Yes - its open-drain RESET output sinks up to 20mA at VOL ≤0.4V (tested at ISINK = 3.5mA), easily supporting standard 10kΩ pull-ups to 1.2V–5.5V rails. At 3.3V pull-up, sink current is ~330µA, well within specification and ensuring robust logic-low assertion.
Does APX803L20-12SA-7 require an external capacitor for reset timing?
No - the 220ms reset timeout is fully internal and factory-trimmed; no external timing capacitor or resistor is needed. This eliminates component count, board area, and temperature-dependent drift associated with RC networks - confirmed in Electrical Characteristics table (tDELAY parameter).
Is APX803L20-12SA-7 qualified for automotive use?
No - APX803L20-12SA-7 is rated for industrial temperature range (–40°C to +85°C) and is not AEC-Q100 qualified. For automotive applications, Diodes offers the APX803L-A series with PPAP capability and IATF 16949 manufacturing - contact Diodes representative for qualified alternatives.
APX803L20-12SA-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:
- 1.2V
- 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
APX803L20-12SA-7 FAQ
1.How can I place an order for APX803L20-12SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-12SA-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 APX803L20-12SA-7 reliable?
The price and inventory of APX803L20-12SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-12SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-12SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-12SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-12SA-7?
APX803L20-12SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-12SA-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 APX803L20-12SA-7?
For technical support, including APX803L20-12SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-12SA-7 requirements.
6.How does Aetrix verify that APX803L20-12SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-12SA-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 APX803L20-12SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-12SA-7?
All APX803L20-12SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-12SA-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 APX803L20-12SA-7 part is unused and in its original packaging.
Return procedure for APX803L20-12SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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