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Diodes Incorporated APX803L-15SA-7
- Part No.:
- APX803L-15SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L-15SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,995
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Product details
Overview
APX803L-15SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 1.5V threshold detection with ±1.5% accuracy, 1µA typical supply current, and open-drain active-low reset output in SOT23 package-used in battery-powered IoT sensors and portable medical devices to ensure reliable power-on reset sequencing.
For engineers reviewing the APX803L-15SA-7 datasheet, APX803L-15SA-7 pinout, APX803L-15SA-7 application, or APX803L-15SA-7 equivalent, this page delivers verified threshold voltage, reset delay timing (0ms default), supply current, thermal performance, and pin-level functional roles-critical for low-power system reliability validation and BOM optimization.
Technical Context
The APX803L-15SA-7 implements a fixed-threshold voltage monitoring circuit with internal 1.5V reference, hysteresis of 0.01×VTH (15mV), and temperature coefficient of 50ppm/°C. Its comparator-based architecture triggers reset when VCC drops below 1.5V and holds reset until VCC exceeds 1.515V (rising threshold).
It features a fast 20µs response time from VCC drop to RESET assertion and operates across -40°C to +85°C ambient range with supply voltage from 0.9V to 5.5V-enabling integration into ultra-low-voltage microcontroller subsystems without external biasing or timing components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.5V ±1.5% - ensures deterministic power-up reset at precisely defined rail level for 1.8V I/O domain systems |
| Supply Current | 1.0µA typical - imposes negligible load on coin-cell or energy-harvested supplies in always-on monitoring |
| Reset Response Time | 20µs - guarantees sub-microsecond fault detection for real-time safety-critical firmware initialization |
| Output Type | Open-drain, active-low - supports wired-OR reset bus sharing and flexible pull-up voltage selection (up to 5.5V) |
| Operating Voltage Range | 0.9V to 5.5V - enables direct connection to Li-ion battery rails (2.7–4.2V) and 3.3V/5V logic domains |
| Hysteresis | 15mV (0.01×VTH) - prevents reset chatter during slow-rising or noisy supply transitions |
| Temperature Coefficient | 50ppm/°C - limits threshold drift to ±0.63% over -40°C to +85°C, preserving reset margin in automotive cabin 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) | Ground Reference | Primary return path for internal comparator and output stage; must be connected to system ground plane for stable threshold reference |
| 2 (RESET) | Open-Drain Reset Output | Active-low signal asserted when VCC < 1.5V; requires external pull-up resistor (typically 10kΩ) to host VCC or higher rail |
| 3 (VCC) | Supply Input | Monitored power rail input; powers internal circuitry and defines detection domain-no separate reference supply needed |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Self-contained detection with internal reference and hysteresis-reduces BOM count and PCB area in space-constrained wearables |
| Ultra-low quiescent current | 1.0µA typ. enables >10-year battery life in CR2032-powered remote sensors operating at 1Hz wake-up rate |
| High threshold accuracy | ±1.5% tolerance eliminates need for factory calibration in consumer-grade portable equipment |
| Fast reset assertion | 20µs propagation ensures MCU reset occurs before core logic enters undefined state during brownout |
| Robust ESD protection | ±4000V HBM rating allows safe handling in standard assembly lines without special ESD controls |
Applications
| Smart Wearable Power Sequencing | Industrial Sensor Node Supervision |
|---|---|
Use Scenario: A wrist-worn health monitor uses a 3.0V LiPo battery and ARM Cortex-M0+ MCU requiring clean reset at power-up and brownout recovery. IC Role / Device Role / Timing Role: APX803L-15SA-7 monitors the 3.0V rail and asserts active-low RESET to hold MCU in reset until voltage stabilizes above 1.5V. Use Value: Prevents firmware crash during battery insertion or low-voltage transient by guaranteeing minimum 1.5V rail integrity before execution begins. |
Use Scenario: A wireless vibration sensor node deployed in factory machinery runs on primary 3.3V supply with backup supercapacitor. IC Role / Device Role / Timing Role: Detects main rail collapse and initiates controlled shutdown via MCU interrupt triggered by RESET deassertion edge. Use Value: Enables graceful data save and flash write completion before power loss-eliminating corrupted sensor logs. |
| Medical Patch Monitor Reset Control | Automotive Body Control Module (BCM) Subsystem |
Use Scenario: Disposable ECG patch powered by thin-film battery must operate reliably across -20°C to +50°C ambient range. IC Role / Device Role / Timing Role: Provides temperature-stable 1.5V reset threshold with 50ppm/°C drift-ensuring consistent behavior during patient movement-induced thermal shifts. Use Value: Maintains FDA-required functional safety margin without recalibration, supporting Class II medical device certification. |
Use Scenario: BCM sub-module (e.g., door lock controller) receives switched 12V-to-3.3V DC/DC output subject to load dump transients. IC Role / Device Role / Timing Role: Monitors post-regulator 3.3V rail and asserts RESET within 20µs if voltage dips below 1.5V during transient event. Use Value: Guarantees deterministic MCU restart after ISO 7637-2 Pulse 5a events-meeting OEM robustness requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB15DBVR | 1.5V threshold, 0.5µA supply current, but only 0ms/200ms delay options-no 55ms/450ms variants | Requires redesign of reset timing if 55ms debounce is critical for MCU boot sequence | Select when lowest possible current (<0.5µA) is prioritized over delay flexibility |
| MAX809SEUR+T | 1.5V threshold, ±2.5% accuracy, 10µA supply current, SOT23-3 package | Higher current draw reduces battery life in multi-year deployments; wider tolerance may require margin adjustment in tight-rail designs | Select when legacy MAX809 footprint compatibility is mandatory and 10µA current is acceptable |
Compared with TLV803EB15DBVR and MAX809SEUR+T, the APX803L-15SA-7 offers superior threshold accuracy (±1.5% vs. ±2.5%), lower supply current than MAX809, and unique 55ms/220ms/450ms delay options-making it optimal for next-gen ultra-low-power embedded systems demanding precision and timing flexibility.
Availability
APX803L-15SA-7 is available at Aetrix Electronics and suitable for smart wearable power sequencing, industrial sensor node supervision, medical patch monitor reset control, and automotive body control module subsystems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for APX803L-15SA-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 U.S., serving industrial, computing, communications, and consumer markets.
The APX803L series belongs to Diodes' precision power management portfolio, engineered specifically for ultra-low-power supervisory functions in battery-sensitive and thermally demanding applications-emphasizing accuracy, stability, and minimal footprint.
FAQ
What is the exact reset threshold voltage for APX803L-15SA-7?
The APX803L-15SA-7 has a nominal reset threshold of 1.5V with guaranteed accuracy of ±1.5% over temperature (−40°C to +85°C), meaning the actual trip point falls between 1.4775V and 1.5225V at 25°C, and includes 15mV hysteresis to prevent oscillation during slow supply ramps.
Does APX803L-15SA-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 4.7kΩ to 10kΩ) to a valid logic rail (e.g., 3.3V or 5V) is mandatory to generate a high-level signal when not asserted; no internal pull-up is provided.
Can APX803L-15SA-7 operate with supply voltages below 1.5V?
Yes-it functions down to 0.9V supply (per Recommended Operating Conditions), but reset assertion only occurs when VCC falls below 1.5V; below 0.9V, device behavior is undefined and not guaranteed per datasheet specifications.
Is APX803L-15SA-7 qualified for automotive applications?
No-APX803L-15SA-7 is not AEC-Q100 qualified; Diodes offers automotive-grade variants (e.g., APX803L-15SA-7Q) with PPAP capability and IATF 16949 manufacturing, but this specific part number is intended for industrial and consumer applications only.
APX803L-15SA-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:
- 1.5V
- 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-15SA-7 FAQ
1.How can I place an order for APX803L-15SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L-15SA-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-15SA-7 reliable?
The price and inventory of APX803L-15SA-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-15SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L-15SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L-15SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L-15SA-7?
APX803L-15SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L-15SA-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-15SA-7?
For technical support, including APX803L-15SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L-15SA-7 requirements.
6.How does Aetrix verify that APX803L-15SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L-15SA-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-15SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L-15SA-7?
All APX803L-15SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L-15SA-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-15SA-7 part is unused and in its original packaging.
Return procedure for APX803L-15SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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