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Diodes Incorporated APX803L-23SA-7
- Part No.:
- APX803L-23SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L-23SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,995
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Product details
Overview
APX803L-23SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply levels in embedded digital systems. It features a fixed 2.3V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and 220ms reset timeout delay. Used in battery-powered instrumentation and portable microcontroller systems where low quiescent power and precise brownout detection are critical.
For engineers reviewing the APX803L-23SA-7 datasheet, APX803L-23SA-7 pinout, APX803L-23SA-7 application, or APX803L-23SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay timing stability over temperature, open-drain sink capability (3.5mA @ 0.4V), and SOT23 package compatibility with space-constrained PCB layouts.
Technical Context
The APX803L-23SA-7 implements a precision bandgap-based voltage reference comparator with built-in hysteresis (0.01×VTH) to prevent oscillation during threshold crossing. Its internal architecture delivers fast 20µs reset assertion upon VCC drop below 2.3V and holds RESET low until VCC rises above 2.316V (typical release voltage).
It operates across -40°C to +85°C ambient, maintains ±50 ppm/°C threshold temperature coefficient, and supports system-level power sequencing via configurable 220ms recovery delay-enabling reliable initialization of microcontrollers after power-up or brownout events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 2.3V ±1.5% - ensures stable reset activation at defined supply rail margin |
| Supply Current | 1.0µA (typ.), 2.5µA (max.) - enables multi-year operation in coin-cell–powered devices |
| Reset Delay | 220ms (typ.) - provides sufficient hold time for µP boot sequence completion |
| Output Type | Open-drain, active-low - allows wired-OR reset bus configuration and flexible pull-up voltage selection |
| Response Time | 20µs - guarantees rapid fault detection during transient supply dips |
| Operating Voltage | 0.9V to 5.5V - supports direct connection to 1.8V, 3.3V, and 5V logic rails |
| Threshold Hysteresis | 0.01×VTH (23mV) - prevents chatter during slow-rising/falling VCC transitions |
Pinout & Package
SOT23-3 package (3-pin, 1.3mm × 2.9mm footprint), RoHS-compliant, lead-free, halogen-free "Green" construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage |
| 2 | RESET | Open-drain active-low reset signal output; requires external pull-up |
| 3 | VCC | Power supply input; also monitored voltage source for threshold detection |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 1µA typ. - minimizes impact on battery life in always-on monitoring applications |
| Precision threshold accuracy | ±1.5% - eliminates need for external calibration in cost-sensitive designs |
| Fixed 220ms reset timeout | Guaranteed 143–297ms range over -40°C to +85°C - ensures robust µP reset timing across industrial environments |
| No external components required | Self-contained detection circuit - reduces BOM count and layout area vs. discrete resistor-divider solutions |
| Wide operating voltage range | 0.9V to 5.5V - supports direct integration into mixed-voltage systems without level-shifting |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor with coin-cell power and ARM Cortex-M0+ MCU. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET until regulated 3.3V rail stabilizes post-battery insertion. Use Value: Prevents firmware execution under undervoltage, avoiding flash corruption and sensor calibration drift. | Use Scenario: DIN-rail mounted remote I/O node with isolated 24V-to-3.3V DC-DC converter. IC Role / Device Role / Timing Role: Monitors 3.3V logic rail; asserts 220ms RESET pulse on AC line sag or converter startup delay. Use Value: Ensures deterministic state machine initialization after power interruption, eliminating spurious I/O toggling. |
| Smart Home Hub Controllers | Wearable Fitness Trackers |
Use Scenario: Wi-Fi–enabled home automation hub powered by Li-ion battery and buck regulator. IC Role / Device Role / Timing Role: Detects 2.3V brownout on 3.3V system rail; holds RESET low until full recovery to prevent RF stack lockup. Use Value: Maintains network connectivity integrity by avoiding partial firmware loads during marginal supply conditions. | Use Scenario: Optical heart-rate sensor with BLE SoC and CR2032 battery. IC Role / Device Role / Timing Role: Supervises 1.8V core voltage; triggers 220ms RESET on battery discharge below 2.3V threshold. Use Value: Extends usable battery life by enabling graceful shutdown before SRAM data loss occurs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB23DBVR | 2.3V threshold, 350ms delay, 0.5µA supply current, SOT23-3 | Longer delay unsuitable for fast-boot µPs; lower current benefits ultra-low-power sleep modes | Select when extended reset hold time is required and supply current is primary constraint |
| MAX809SEUR+T | 2.3V threshold, 240ms delay, 12µA supply current, SOT23-3 | Higher ICC limits use in multi-year battery applications; wider temp range (-40°C to +125°C) | Select for automotive-adjacent industrial designs requiring extended temperature qualification |
Compared with TLV803EB23DBVR and MAX809SEUR+T, the APX803L-23SA-7 offers optimal balance of low ICC (1µA), precise 220ms timing, and industrial-grade temperature performance-making it ideal for portable electronics where battery longevity and deterministic reset behavior are co-prioritized.
Availability
APX803L-23SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub controllers, and wearable fitness trackers requiring stable component supply and long-term production continuity.
Supply support for APX803L-23SA-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' µP supervisory product line, engineered specifically for low-power, high-accuracy voltage monitoring in battery-operated and space-constrained embedded systems.
FAQ
What is the exact reset threshold voltage and tolerance for APX803L-23SA-7?
The APX803L-23SA-7 has a nominal reset threshold of 2.3V with ±1.5% accuracy over temperature (–40°C to +85°C). At +25°C, the actual threshold falls between 2.2655V and 2.3345V. This tight tolerance eliminates need for external trimming and ensures consistent brownout detection across production units.
Does APX803L-23SA-7 require an external pull-up resistor on the RESET pin?
Yes - the RESET pin is open-drain and active-low, requiring an external pull-up resistor to a valid logic-high voltage (e.g., 1.8V, 3.3V, or 5V). Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements. No internal pull-up is present.
Can APX803L-23SA-7 operate from a 1.2V supply?
No - the minimum operating supply voltage is 0.9V, but the device monitors its own VCC pin and requires VCC ≥ 1.02×VTH (≥2.346V) to release RESET. Since VTH = 2.3V, the part cannot function reliably below ~2.35V; it is not intended for sub-2V system rails.
Is APX803L-23SA-7 qualified for automotive applications?
No - APX803L-23SA-7 is not AEC-Q100 qualified. Diodes Incorporated offers automotive-grade variants (e.g., APX803L-23SA-7Q) with PPAP support and IATF 16949 manufacturing, but this specific part number is rated for industrial temperature range (–40°C to +85°C) only.
APX803L-23SA-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:
- 2.3V
- 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-23SA-7 FAQ
1.How can I place an order for APX803L-23SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L-23SA-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-23SA-7 reliable?
The price and inventory of APX803L-23SA-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-23SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L-23SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L-23SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L-23SA-7?
APX803L-23SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L-23SA-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-23SA-7?
For technical support, including APX803L-23SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L-23SA-7 requirements.
6.How does Aetrix verify that APX803L-23SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L-23SA-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-23SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L-23SA-7?
All APX803L-23SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L-23SA-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-23SA-7 part is unused and in its original packaging.
Return procedure for APX803L-23SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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