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Diodes Incorporated APX803L-24SA-7
- Part No.:
- APX803L-24SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L-24SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,923
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Product details
Overview
APX803L-24SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply rails in embedded digital systems. It features a fixed 2.4V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and 220ms reset timeout - enabling reliable power-up sequencing in battery-powered IoT sensors and portable medical devices.
For engineers reviewing the APX803L-24SA-7 datasheet, APX803L-24SA-7 pinout, APX803L-24SA-7 application, or APX803L-24SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, low-quiescent-current operation under brownout conditions, and SOT23 package compatibility with high-density PCB layouts.
Technical Context
The APX803L-24SA-7 integrates a precision bandgap reference and comparator to detect VCC falling below 2.4V ±1.5%, triggering an open-drain RESET signal that remains asserted until VCC exceeds 2.4V + hysteresis (0.01×VTH). Its internal 220ms recovery delay (APX803L20 variant) is factory-trimmed and stable across –40°C to +85°C ambient.
No external components are required: the device operates from 0.9V to 5.5V supply, draws only 1µA typical current, and delivers fast 20µs response time from VCC drop to RESET assertion - making it suitable for ultra-low-power wake-up supervision in always-on edge nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 2.4V ±1.5% - ensures precise brownout detection without calibration overhead |
| Supply Current | 1.0µA typical - minimizes battery drain in multi-year sensor deployments |
| Reset Timeout | 220ms (typical) - provides sufficient hold-off for µP initialization and clock stabilization |
| Response Time | 20µs - guarantees rapid fault signaling before system state corruption |
| Output Type | Open-drain, active-low - enables wired-OR reset bus sharing and flexible pull-up voltage selection |
| Operating Voltage | 0.9V to 5.5V - supports single-cell Li-ion, 3.3V logic, and 5V legacy interfaces |
| Temperature Range | –40°C to +85°C - validated for industrial and automotive cabin-ambient 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 | Reference ground return path for internal comparator and bandgap circuitry |
| 2 | RESET | Open-drain output; sinks current when VCC < 2.4V; requires external pull-up |
| 3 | VCC | Power input pin; supplies internal circuitry and defines monitored rail |
Key Features
| Feature | Design Value |
|---|---|
| Low supply current | 1.0µA typ. - extends battery life in coin-cell-powered wearables by >10 years |
| Fixed threshold accuracy | ±1.5% - eliminates need for external resistor divider trimming or calibration |
| Built-in delay options | 220ms factory-set - removes timing capacitor and reduces BOM count |
| Fast reset assertion | 20µs propagation - prevents µP execution during unstable power ramp-up |
| No external components | Self-contained detection - simplifies layout and improves reliability vs. discrete solutions |
Applications
| Smart Wearable Power Supervision | Industrial Sensor Node Reset Control |
|---|---|
Use Scenario: Continuous heart-rate monitoring using BLE SoC powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Monitors 3.0V supply rail; asserts RESET if voltage drops below 2.4V during RF transmission burst. Use Value: Prevents firmware crash and data loss by holding µP in reset until stable supply resumes, leveraging 220ms timeout to cover transient dips. |
Use Scenario: Wireless temperature sensor deployed in factory HVAC ducts with wide ambient swings. IC Role / Device Role / Timing Role: Supervises 3.3V LDO output feeding MCU and analog front-end; triggers clean restart on cold-start undervoltage. Use Value: Ensures deterministic boot sequence at –40°C startup via guaranteed 20µs response and ±1.5% threshold stability across temperature. |
| Portable Medical Diagnostic Device | Edge AI Inference Module Power Sequencing |
Use Scenario: Handheld ECG analyzer with rechargeable LiPo battery and dual-rail power (1.8V/3.3V). IC Role / Device Role / Timing Role: Primary VCC supervisor on 3.3V domain; coordinates reset release with 1.8V rail stabilization via external OR-ing. Use Value: Enables safe power-up coordination without additional timing ICs, reducing board area and cost in Class II medical-certified designs. |
Use Scenario: Low-power vision module using RISC-V MCU and tinyML accelerator, powered from USB-C PD source. IC Role / Device Role / Timing Role: Detects input rail collapse during cable disconnect; holds system in reset for 220ms to allow graceful shutdown of neural network inference state. Use Value: Avoids memory corruption and flash write errors during hot-unplug events, improving field reliability in unattended deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G24DBVR | Higher quiescent current (1.1µA min), tighter threshold accuracy (±0.5%), same 220ms delay | Requires external pull-up; lacks integrated hysteresis tuning | Preferred where higher accuracy justifies 10× higher cost and larger footprint |
| MAX809SEUR+T | 2.4V threshold, but only 140ms delay option and 2.5µA max ICC | Not qualified for extended temperature range; limited automotive traceability | Acceptable for commercial-grade consumer electronics with relaxed timing margins |
Compared with TPS3808G24DBVR and MAX809SEUR+T, the APX803L-24SA-7 delivers superior power efficiency (1µA typ.) and full industrial temperature support in the smallest SOT23-3 package, making it optimal for space-constrained, long-life battery applications where precision timing and minimal BOM are critical.
Availability
APX803L-24SA-7 is available at Aetrix Electronics and suitable for smart wearable power supervision, industrial sensor node reset control, portable medical diagnostic devices, and edge AI inference module power sequencing requiring stable component supply and long-term lifecycle assurance.
Supply support for APX803L-24SA-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 ICs, with design centers across Asia, Europe, and the US and manufacturing in IATF 16949-certified facilities.
The APX803L series belongs to Diodes' precision power management portfolio, engineered specifically for ultra-low-power supervisory functions in battery-critical and space-constrained embedded systems.
FAQ
What is the exact reset threshold voltage and tolerance for APX803L-24SA-7?
The APX803L-24SA-7 has a nominal reset threshold of 2.4V with a guaranteed accuracy of ±1.5% over temperature (–40°C to +85°C) and supply voltage (0.9V to 5.5V), corresponding to a range of 2.364V to 2.436V at +25°C per datasheet DS38171 Rev. 3-2.
Does APX803L-24SA-7 require an external pull-up resistor on the RESET pin?
Yes - the RESET pin is open-drain and active-low, so an external pull-up resistor (typically 10kΩ to 3.3V or 5V) is mandatory to generate a valid logic-high level when the output is inactive; no internal pull-up is provided.
Can APX803L-24SA-7 operate from a 1.2V supply rail?
No - the minimum operating supply voltage is 0.9V, but the 2.4V detection threshold requires VCC ≥ 2.4V to function correctly; operation below 2.4V will assert RESET and prevent release, making it unsuitable for sub-2.4V system rails.
Is APX803L-24SA-7 pin-compatible with other APX803L variants in SOT23-3?
Yes - all APX803L variants in SA (SOT23) and SR (SOT23R) packages share identical 3-pin SOT23-3 pinout (GND, RESET, VCC), enabling direct substitution across threshold and delay options without layout changes.
APX803L-24SA-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:
- 2.4V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX803L-24SA-7 FAQ
1.How can I place an order for APX803L-24SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L-24SA-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 APX803L-24SA-7 reliable?
The price and inventory of APX803L-24SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L-24SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L-24SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L-24SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L-24SA-7?
APX803L-24SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L-24SA-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 APX803L-24SA-7?
For technical support, including APX803L-24SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L-24SA-7 requirements.
6.How does Aetrix verify that APX803L-24SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L-24SA-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 APX803L-24SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L-24SA-7?
All APX803L-24SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L-24SA-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 APX803L-24SA-7 part is unused and in its original packaging.
Return procedure for APX803L-24SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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