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Diodes Incorporated APX803L05-35SA-7
- Part No.:
- APX803L05-35SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L05-35SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,839
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Product details
Overview
APX803L05-35SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 3.5V threshold detection with ±1.5% accuracy, 1µA typical supply current, and 55ms reset timeout. It delivers active-low open-drain reset signaling in battery-powered IoT sensors and portable medical devices where low quiescent power and reliable power-on reset are critical.
For engineers reviewing the APX803L05-35SA-7 datasheet, APX803L05-35SA-7 pinout, APX803L05-35SA-7 application, or APX803L05-35SA-7 equivalent, this device supports critical power monitoring in space-constrained embedded systems requiring stable reset behavior across -40°C to +85°C ambient operation, minimal board footprint (SOT23), and no external components.
Technical Context
The APX803L05-35SA-7 integrates a precision bandgap reference and comparator with built-in hysteresis (0.01×VTH) to prevent oscillation during VCC recovery. Its internal 3.5V detection threshold is factory-trimmed and temperature-compensated (50 ppm/°C).
It features a fixed 55ms reset timeout after VCC falls below threshold, with reset assertion completing within 20µs. The open-drain output supports pull-up to any voltage ≤5.5V and sinks up to 20mA, enabling direct interface with µP reset inputs or logic-level control circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 3.5V ±1.5% - precisely monitors 3.3V rail brownout with margin for noise immunity |
| Supply Current | 1.0µA typical - enables >10-year battery life in coin-cell–powered wearables |
| Reset Timeout | 55ms - ensures sufficient hold time for microcontroller initialization sequences |
| Response Time | ≤20µs - guarantees fast reset assertion during rapid supply collapse |
| Output Type | Open-drain, active-low - allows wired-OR reset bus and flexible voltage-level interfacing |
| Operating Temp | -40°C to +85°C - validated for industrial and consumer-grade embedded deployment |
| Package | SOT23-3 - 2.9mm × 1.3mm footprint compatible with high-density PCB layouts |
Pinout & Package
SOT23-3 package: ultra-compact surface-mount outline with gull-wing leads, JEDEC TO-236AB compliant, RoHS-compliant matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal circuitry and reset comparator; must be low-impedance connection |
| 2 | RESET | Open-drain active-low reset output; requires external pull-up resistor to host VCC or logic rail |
| 3 | VCC | Power input pin; supplies internal reference and comparator; operates from 0.9V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated reference, comparator, and delay timing eliminate capacitors/resistors - reduces BOM count and layout area |
| High threshold accuracy | ±1.5% over temperature - ensures deterministic reset point without calibration overhead |
| Ultra-low supply current | 1.0µA typical - minimizes impact on battery drain in always-on sensing nodes |
| Fast reset assertion | ≤20µs propagation - meets tight timing budgets for real-time microcontrollers |
| Robust ESD protection | ±4000V HBM - enhances reliability during handling and system integration |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor with CR2032 battery and ARM Cortex-M0+ MCU. IC Role / Device Role / Timing Role: Voltage detector asserting active-low reset until 3.3V rail stabilizes post-battery insertion. Use Value: Prevents firmware lockup during cold start by guaranteeing ≥55ms reset pulse at 3.5V threshold with <1µA quiescent draw. |
Use Scenario: DIN-rail mounted digital input module powered from 24VDC converted to 3.3V. IC Role / Device Role / Timing Role: Supervises 3.3V logic rail; triggers system-wide reset on undervoltage events caused by field wiring faults. Use Value: Ensures deterministic recovery after transient dips using ±1.5% accurate 3.5V trip point and hysteresis-enabled noise rejection. |
| Smart Home Edge Nodes | Asset Tracking Beacons |
Use Scenario: Zigbee-enabled occupancy sensor with Li-SOCl₂ primary cell and low-power SoC. IC Role / Device Role / Timing Role: Monitors regulated 3.3V supply; asserts reset if voltage sags below 3.5V due to RF transmit current surge. Use Value: Maintains system integrity under pulsed load conditions via 20µs-fast response and 55ms guaranteed hold time. |
Use Scenario: GPS asset tracker operating on AA alkaline cells with buck-boost regulator. IC Role / Device Role / Timing Role: Detects end-of-life battery condition by monitoring 3.3V rail collapse; initiates graceful shutdown sequence. Use Value: Extends usable battery life by avoiding premature resets with 1µA detector current and temperature-stable 50 ppm/°C threshold drift. |
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, 2.5µA max ICC, 200ms default timeout (adjustable via capacitor) | Requires external timing capacitor; larger solution size; higher quiescent current | Select when adjustable timeout or tighter 0.5% threshold accuracy is required, and board space permits capacitor placement. |
| MAX809SEUR+T | 3.08V threshold, 12µA max ICC, 140ms timeout, SOT23-3 package | Higher supply current limits battery lifetime; fixed 140ms timeout lacks flexibility for fast-boot MCUs | Choose only if legacy compatibility with MAX809 footprint and timing is mandatory, accepting 12× higher ICC penalty. |
Compared with TPS3808G33DBVR and MAX809SEUR+T, the APX803L05-35SA-7 delivers superior energy efficiency (1µA vs. ≥2.5µA), tighter timing control (fixed 55ms vs. capacitor-dependent or inflexible 140ms), and optimized 3.5V threshold for modern 3.3V systems with headroom - making it ideal for next-gen ultra-low-power edge devices.
Availability
APX803L05-35SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home edge nodes, and asset tracking beacons requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for APX803L05-35SA-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 across Asia, Europe, and the US, serving industrial, computing, communications, and consumer markets.
The APX803L series belongs to Diodes' precision power supervision product line, engineered specifically for ultra-low-power microprocessor reset applications in battery-critical and space-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of APX803L05-35SA-7?
The APX803L05-35SA-7 has a factory-trimmed detection threshold of 3.5V with ±1.5% accuracy over temperature (–40°C to +85°C). This value is fixed internally and does not require external configuration. Measured hysteresis is 0.01×VTH, ensuring stable release above 3.5V + ~35mV.
Can APX803L05-35SA-7 drive a microcontroller reset pin directly?
Yes - its open-drain RESET output sinks up to 20mA and operates with VCC up to 5.5V. To interface with a standard µP reset pin, connect an external pull-up resistor (typically 10kΩ) from RESET to the µP's VDD rail. No level-shifting circuitry is needed for 1.8V–5.5V logic domains.
Does APX803L05-35SA-7 require a bypass capacitor on VCC?
A 100nF ceramic capacitor is recommended between VCC and GND, placed as close as possible to the device pins. This stabilizes the internal reference during transient load changes and improves noise immunity - especially critical in noisy switching power supply environments.
Is APX803L05-35SA-7 qualified for automotive applications?
No - APX803L05-35SA-7 is specified for industrial and commercial temperature ranges (–40°C to +85°C) and is not AEC-Q100 qualified. For automotive use, Diodes offers the APX803L-xxxxQ variants with extended qualification, PPAP capability, and IATF 16949 manufacturing compliance.
APX803L05-35SA-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:
- 3.5V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 35ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX803L05-35SA-7 FAQ
1.How can I place an order for APX803L05-35SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L05-35SA-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 APX803L05-35SA-7 reliable?
The price and inventory of APX803L05-35SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L05-35SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L05-35SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L05-35SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L05-35SA-7?
APX803L05-35SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L05-35SA-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 APX803L05-35SA-7?
For technical support, including APX803L05-35SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L05-35SA-7 requirements.
6.How does Aetrix verify that APX803L05-35SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L05-35SA-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 APX803L05-35SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L05-35SA-7?
All APX803L05-35SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L05-35SA-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 APX803L05-35SA-7 part is unused and in its original packaging.
Return procedure for APX803L05-35SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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