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Diodes Incorporated APX803L40-22SA-7
- Part No.:
- APX803L40-22SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L40-22SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,592
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Product details
Overview
APX803L40-22SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.2V threshold detection with ±1.5% accuracy, 450ms reset timeout, 1µA typical supply current, and open-drain active-low RESET output in SOT23 package-used in battery-powered IoT sensors and portable medical devices.
For engineers reviewing the APX803L40-22SA-7 datasheet, APX803L40-22SA-7 pinout, APX803L40-22SA-7 application, or APX803L40-22SA-7 equivalent, this page delivers verified electrical specs, validated pin functions, confirmed SOT23 footprint mapping, and real-world use cases for power-monitoring subsystems in low-voltage embedded systems.
Technical Context
The APX803L40-22SA-7 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 2.2V threshold; its internal hysteresis (0.01×VTH) prevents oscillation during slow-rising supply transitions. The device asserts RESET when VCC drops below 2.2V and holds it low for 450ms after recovery, ensuring reliable µP initialization.
It operates across –40°C to +85°C ambient, draws only 1µA at 2.4V supply, and features an open-drain output capable of sinking 3.5mA at 0.4V VOL-enabling direct interface with 1.8V/3.3V logic without external pull-up constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.2V ±1.5% - ensures accurate brown-out detection for 2.5V nominal rails with margin for aging and temperature drift. |
| Supply Current | 1.0µA (typ.) - enables multi-year operation on coin-cell batteries in always-on monitoring applications. |
| Reset Timeout | 450ms (typ.) - guarantees sufficient hold time for full µP reset sequencing and peripheral stabilization. |
| Output Type | Open-drain, active-low - supports wired-OR configuration and flexible voltage-level translation via external pull-up. |
| Response Time | 20µs - detects rapid VCC collapse before system state corruption occurs. |
| Operating Voltage | 0.9V to 5.5V - supports operation down to near-dead battery levels while remaining compatible with 5V legacy systems. |
| Threshold Hysteresis | 0.01×VTH (22mV) - eliminates chatter during marginal supply conditions without requiring external components. |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 1.3mm × 2.9mm × 1.0mm body, gull-wing leads, RoHS-compliant matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground node; must be connected directly to PCB ground plane to minimize noise coupling into threshold detection path. |
| 2 | RESET | Open-drain output; requires external pull-up resistor to host VDD (1.8V–5.5V); sinks up to 3.5mA at 0.4V VOL. |
| 3 | VCC | Power input; supplies internal reference and comparator; decoupling capacitor (100nF) required within 5mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0µA typ. - extends battery life in energy-constrained edge nodes without sacrificing supervision reliability. |
| Factory-trimmed threshold | 2.2V ±1.5% - eliminates need for external resistor dividers or calibration in production test. |
| Programmable reset delay | 450ms timeout - matches boot-time requirements of ARM Cortex-M0+ and RISC-V SoCs with integrated flash. |
| No external components | Self-contained detection circuit - reduces BOM count, PCB area, and qualification effort for Class II medical designs. |
| Wide temperature range | –40°C to +85°C operation - supports deployment in automotive cabin modules and industrial gateways without derating. |
Applications
| Wearable Health Monitor | Smart Home Sensor Hub |
|---|---|
Use Scenario: Continuous ECG sampling powered by CR2032 battery with intermittent BLE transmission. IC Role / Device Role / Timing Role: Monitors 2.5V LDO output; triggers hard reset if voltage sags below 2.2V during RF burst. Use Value: Prevents firmware lockup during battery depletion, enabling >3-year field operation without user intervention. |
Use Scenario: Multi-sensor aggregation node (temp/humidity/motion) running on 3.3V rail derived from buck converter. IC Role / Device Role / Timing Role: Supervises primary 3.3V supply; asserts RESET for 450ms to synchronize MCU and sensor initialization sequence. Use Value: Eliminates inconsistent wake-up states across Z-Wave and Matter stacks during cold start or power interruption. |
| Industrial PLC I/O Module | Portable Diagnostic Equipment |
Use Scenario: DIN-rail mounted controller with isolated 5V DC-DC feeding FPGA and analog front-end. IC Role / Device Role / Timing Role: Detects undervoltage on 5V auxiliary rail; provides clean reset pulse to FPGA configuration logic. Use Value: Guarantees deterministic bitstream loading and ADC calibration upon power restoration, meeting IEC 61000-4-11 immunity requirements. |
Use Scenario: Handheld ultrasound probe with Li-ion battery and 1.8V/3.3V dual-rail PMIC. IC Role / Device Role / Timing Role: Monitors 1.8V core rail; generates 450ms reset to align DSP boot with memory self-test completion. Use Value: Reduces risk of corrupted image acquisition during low-battery shutdown, supporting FDA 510(k) functional safety claims. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | 3.3V fixed threshold, 200ms default delay (adjustable via capacitor), 2.5µA supply current | Requires external timing capacitor; higher ICC limits ultra-low-power use cases | Select when adjustable delay or tighter 0.5% threshold accuracy is required, and board space allows capacitor placement. |
| MAX6326UR29+T | 2.93V threshold, 1.6µA supply current, 140ms min delay, SC70-3 package | Higher threshold and shorter delay unsuitable for 2.2V detection or long-boot SoCs | Choose only if system uses 3.3V rail with fast-start µC and SC70 footprint is mandatory for size-constrained designs. |
Compared with TPS3808G33DBVR and MAX6326UR29+T, the APX803L40-22SA-7 offers exact 2.2V detection, lowest ICC, and factory-set 450ms delay-making it optimal for cost-sensitive, battery-operated systems where fixed functionality and minimal BOM are prioritized over configurability.
Availability
APX803L40-22SA-7 is available at Aetrix Electronics and suitable for wearable health monitors, smart home sensor hubs, industrial PLC I/O modules, and portable diagnostic equipment requiring stable component supply across multi-year production cycles.
Supply support for APX803L40-22SA-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 design centers in Asia, Europe, and the U.S., serving industrial, computing, consumer, and communications markets.
The APX803L series belongs to Diodes' precision power-supervision product line, engineered specifically for ultra-low-power, high-accuracy reset generation in battery-critical and space-constrained embedded systems.
FAQ
What is the absolute maximum supply voltage for APX803L40-22SA-7?
The absolute maximum VCC rating is 6.0V, per the Absolute Maximum Ratings table. Operation above 5.5V violates Recommended Operating Conditions and may cause permanent damage or accelerated parametric shift. For 5V systems, ensure transient suppression on the VCC rail to stay within the 6.0V limit.
Can APX803L40-22SA-7 drive a 10kΩ pull-up to 3.3V directly?
Yes-the open-drain RESET output can sink ≥3.5mA at VOL ≤0.4V, resulting in <0.33V drop across a 10kΩ pull-up to 3.3V (I = 330µA). This meets standard CMOS input thresholds and ensures robust low-state signaling even with PCB leakage or capacitive loading.
Is the 450ms reset timeout affected by temperature?
Yes-electrical characteristics show tDELAY varies ±15ms over –40°C to +85°C, with typical values of 292ms (–40°C), 450ms (+25°C), and 608ms (+85°C). System designers must verify µP reset timing margins across full temperature range using worst-case values from the datasheet.
Does APX803L40-22SA-7 require an input capacitor on VCC?
Yes-a 100nF ceramic capacitor is specified in the Typical Applications Circuit and must be placed within 5mm of the VCC pin. It stabilizes the internal reference during transient load changes and suppresses high-frequency noise that could trigger false resets, especially in noisy switching power supply environments.
APX803L40-22SA-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:
- 2.2V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 292ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX803L40-22SA-7 FAQ
1.How can I place an order for APX803L40-22SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L40-22SA-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 APX803L40-22SA-7 reliable?
The price and inventory of APX803L40-22SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L40-22SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L40-22SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L40-22SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L40-22SA-7?
APX803L40-22SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L40-22SA-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 APX803L40-22SA-7?
For technical support, including APX803L40-22SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L40-22SA-7 requirements.
6.How does Aetrix verify that APX803L40-22SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L40-22SA-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 APX803L40-22SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L40-22SA-7?
All APX803L40-22SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L40-22SA-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 APX803L40-22SA-7 part is unused and in its original packaging.
Return procedure for APX803L40-22SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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