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Diodes Incorporated APX803L20-23SA-7
- Part No.:
- APX803L20-23SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L20-23SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,795
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Product details
Overview
APX803L20-23SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply levels in embedded and battery-powered systems. It features a fixed 2.3V detection threshold (±1.5% accuracy), 1µA typical supply current, 220ms reset timeout, open-drain active-low RESET output, and operates from −40°C to +85°C ambient temperature - enabling reliable power-up sequencing in portable instrumentation.
For engineers reviewing the APX803L20-23SA-7 datasheet, APX803L20-23SA-7 pinout, APX803L20-23SA-7 application, or APX803L20-23SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, low-quiescent-current impact on battery life, and SOT23 package compatibility with high-density PCB layouts.
Technical Context
The APX803L20-23SA-7 implements a precision bandgap-based voltage reference with built-in hysteresis (0.01×VTH) to prevent oscillation during supply ramp-up/down. Its internal comparator triggers an open-drain RESET signal when VCC falls below 2.3V and holds it active until VCC exceeds the release threshold (2.3V + hysteresis).
Reset assertion occurs within 20µs of VCC crossing the falling threshold, and the 220ms timeout (typ.) is factory-programmed - no external capacitor required. The device draws only 1µA at VCC = VTH + 0.2V, making it suitable for always-on monitoring in energy-constrained nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 2.3V ±1.5% - ensures accurate brown-out detection for 2.5V/3.3V logic rails with minimal false resets |
| Supply Current | 1.0µA (typ.), 2.5µA (max.) - enables multi-year operation on coin-cell batteries without measurable drain |
| Reset Timeout | 220ms (typ.) - provides sufficient hold time for µP initialization and peripheral stabilization |
| Response Time | ≤20µs - guarantees fast fault capture before system state corruption occurs |
| Output Type | Open-drain, active-low - allows wired-OR configuration and flexible pull-up voltage selection (up to 5.5V) |
| Operating Temp | −40°C to +85°C - supports industrial and extended commercial environments without derating |
| Package | SOT23-3 - surface-mount footprint compatible with automated assembly and thermal management up to 200°C/W θJA |
Pinout & Package
SOT23-3 package: ultra-small outline transistor (3-pin), 1.3mm × 2.9mm body, 0.95mm height, gull-wing leads, RoHS-compliant matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal circuitry and reset comparator; must be connected to system ground plane |
| 2 | RESET | Open-drain active-low output; requires external pull-up resistor to host VCC or higher rail (≤5.5V) |
| 3 | VCC | Power input pin; supplies internal reference and comparator; valid range 0.9V–5.5V |
Key Features
| Feature | Design Value |
|---|---|
| No external components | Eliminates need for timing capacitors or bias resistors - reduces BOM count and layout area |
| Fixed 0.1V-step thresholds | 2.3V option precisely matches common I/O voltage domains (e.g., 2.5V LDO outputs) |
| High accuracy over temperature | ±1.5% threshold tolerance maintained across −40°C to +85°C, minimizing calibration overhead |
| Low-temperature coefficient | 50 ppm/°C ∆VTH ensures stable trip point in thermally varying enclosures |
| Lead-free & green compliance | Fully RoHS 3 (2015/863/EU), halogen- and antimony-free - meets global environmental compliance mandates |
Applications
| Industrial Sensor Node | Medical Wearable |
|---|---|
Use Scenario: Battery-powered temperature/humidity sensor transmitting data via BLE every 30 seconds. IC Role / Device Role / Timing Role: Monitors 3.3V LDO output to assert RESET if supply sags below 2.3V during RF transmission burst. Use Value: Prevents firmware lockup by ensuring µP restarts cleanly after brown-out, avoiding corrupted sensor readings or failed transmissions. | Use Scenario: ECG patch with ultra-low-power MCU operating from CR2032 coin cell. IC Role / Device Role / Timing Role: Supervises 2.5V analog front-end supply; holds RESET active for 220ms to guarantee full ADC initialization post-power-up. Use Value: Enables deterministic boot sequence with zero external timing components, extending battery life via 1µA quiescent draw. |
| Smart Meter Interface | POS Terminal Controller |
Use Scenario: M-Bus interface module powered from isolated 5V DC-DC converter with variable load transients. IC Role / Device Role / Timing Role: Detects dips on 5V rail caused by relay switching; asserts open-drain RESET to halt communication until stable. Use Value: Avoids bus arbitration errors and EEPROM write corruption during transient undervoltage events. | Use Scenario: Retail payment terminal using ARM Cortex-M4 with external flash and display driver. IC Role / Device Role / Timing Role: Provides synchronized power-on reset to all subsystems; 220ms timeout accommodates slow-ramping 1.8V core rail. Use Value: Guarantees deterministic startup across voltage rails with different slew rates, eliminating race conditions. |
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, 200ms delay, 0.5µA IQ, SOT23-3 - lower supply current but tighter temp range (−40°C to +125°C) | Higher max ambient rating suits automotive under-hood use; not qualified to AEC-Q100 | Select if sub-1µA IQ is critical and operating above +85°C is required |
| MAX809SEUR+T | 2.3V threshold, 240ms delay, 12µA IQ, SOT23-3 - higher supply current, wider VCC range (1V–5.5V) | Less suitable for coin-cell lifetime-critical designs; better for noisy industrial rails due to higher noise immunity | Select if robustness against EFT/burst noise outweighs quiescent current penalty |
Compared with TLV803EB23DBVR and MAX809SEUR+T, the APX803L20-23SA-7 delivers optimal balance of ultra-low IQ (1µA), production-ready 220ms timing, and industrial-grade temperature support - making it ideal for cost-sensitive, long-life portable electronics where every nanoamp counts.
Availability
APX803L20-23SA-7 is available at Aetrix Electronics and suitable for industrial sensor nodes, medical wearables, smart meter interfaces, and POS terminal controllers requiring stable component supply across multi-year production cycles.
Supply support for APX803L20-23SA-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The APX803L series belongs to Diodes' Power Management & Supervisory product line, engineered specifically for low-power, high-accuracy voltage monitoring in space- and energy-constrained embedded systems.
FAQ
What is the exact reset threshold voltage for APX803L20-23SA-7?
The APX803L20-23SA-7 has a factory-trimmed detection threshold of 2.3V with ±1.5% accuracy over −40°C to +85°C. This value is fixed internally and cannot be adjusted externally. The release threshold is approximately 2.3V plus hysteresis (0.01×2.3V = 23mV), ensuring clean, bounce-free reset deassertion.
Can APX803L20-23SA-7 drive a 10kΩ pull-up resistor to 5V?
Yes - the open-drain RESET output can sink ≥3.5mA at VOL ≤0.4V (VCC = VTH − 0.2V), supporting standard 10kΩ pull-ups to 5V. At 5V pull-up, the resulting output low voltage remains <0.4V, satisfying TTL and CMOS input thresholds for most µPs and FPGAs.
Does APX803L20-23SA-7 require an external capacitor for timing?
No - the 220ms reset timeout is fully integrated and factory-programmed. No external capacitor or resistor is needed, simplifying layout and eliminating timing drift due to component tolerance or temperature variation.
Is APX803L20-23SA-7 qualified for automotive applications?
No - APX803L20-23SA-7 is specified for industrial/commercial temperature range (−40°C to +85°C) and is not AEC-Q100 qualified. For automotive use, Diodes offers the APX803L20-23SA-7Q variant (with Q suffix), which undergoes PPAP and is manufactured in IATF 16949-certified facilities.
APX803L20-23SA-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:
- 143ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX803L20-23SA-7 FAQ
1.How can I place an order for APX803L20-23SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-23SA-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 APX803L20-23SA-7 reliable?
The price and inventory of APX803L20-23SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-23SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-23SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-23SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-23SA-7?
APX803L20-23SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-23SA-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 APX803L20-23SA-7?
For technical support, including APX803L20-23SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-23SA-7 requirements.
6.How does Aetrix verify that APX803L20-23SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-23SA-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 APX803L20-23SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-23SA-7?
All APX803L20-23SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-23SA-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 APX803L20-23SA-7 part is unused and in its original packaging.
Return procedure for APX803L20-23SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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