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Diodes Incorporated APX803L40-15SA-7
- Part No.:
- APX803L40-15SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L40-15SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:1,087
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Product details
Overview
APX803L40-15SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply levels in battery-powered and low-power digital systems. It features a fixed 1.5V detection threshold, ±1.5% accuracy, 450ms reset timeout, 1µA typical supply current, and open-drain active-low RESET output - enabling reliable power-on reset and brownout protection in portable instrumentation and IoT edge nodes.
For engineers reviewing the APX803L40-15SA-7 datasheet, APX803L40-15SA-7 pinout, APX803L40-15SA-7 application, or APX803L40-15SA-7 equivalent, this device delivers precise, low-burden voltage supervision with factory-set timing and no external components required - critical for space-constrained, energy-sensitive designs requiring deterministic reset behavior under varying supply conditions.
Technical Context
The APX803L40-15SA-7 integrates a precision bandgap reference, comparator, and internal delay timer to generate an active-low open-drain RESET signal when VCC drops below 1.5V (±1.5%). Its 450ms recovery delay is fixed at manufacture and stable across –40°C to +85°C operating ambient.
It operates from 0.9V to 5.5V supply, draws only 1µA typical current, and maintains 20µs response time from VCC drop to RESET assertion. The device requires no external capacitors or resistors, simplifying BOM and PCB layout while ensuring consistent timing across production lots.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 1.5V ±1.5% - ensures accurate brownout detection for 1.8V/3.3V logic rails with minimal margin error. |
| Reset Timeout Delay | 450ms (typ.) - guarantees sufficient system stabilization before release of µP reset, eliminating premature boot attempts. |
| Supply Current | 1.0µA (typ.), 2.5µA (max.) - enables multi-year operation on coin-cell batteries without measurable drain impact. |
| Output Type | Open-drain, active-low - supports wired-OR reset bus configurations and flexible pull-up voltage selection (up to 5.5V). |
| Response Time | 20µs - provides rapid fault detection during fast transients, meeting µP reset setup requirements. |
| Operating Voltage Range | 0.9V to 5.5V - supports supervision of ultra-low-voltage MCUs (e.g., ARM Cortex-M0+) and standard 3.3V/5V supplies. |
| Temperature Range | –40°C to +85°C - validated for industrial and extended-temperature embedded applications. |
Pinout & Package
SOT23-3 package (JEDEC MO-178AA), 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 circuitry; must be connected directly to system ground plane for noise immunity. |
| 2 (RESET) | Open-Drain Reset Output | Active-low signal asserted when VCC < 1.5V; requires external pull-up to define logic-high level and drive strength. |
| 3 (VCC) | Supply Input | Powers internal circuitry and monitors input rail; decoupling capacitor (100nF) recommended within 5mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Internal threshold, timing, and reference eliminate need for external R/C networks - reduces BOM count and layout area by ≥3 parts. |
| High threshold accuracy | ±1.5% over temperature - minimizes false resets and improves system reliability vs. ±3–5% alternatives. |
| Ultra-low quiescent current | 1µA typical - extends battery life in always-on sensors and wearables beyond 10 years on CR2032. |
| Fast response time | 20µs VCC-to-RESET assertion - meets tight timing windows for modern low-latency MCUs and SoCs. |
| Robust ESD rating | ±4000V HBM - protects against handling damage during assembly and field service in unshielded environments. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) with BLE radio and ultra-low-power MCU. IC Role / Device Role / Timing Role: Monitors 1.8V LDO output to assert reset if battery voltage sags below safe operating level during RF transmission. Use Value: Prevents firmware corruption and sensor calibration drift by enforcing clean reboot before brownout-induced logic faults occur. |
Use Scenario: DIN-rail mounted remote I/O node with isolated 24V-to-3.3V power conversion. IC Role / Device Role / Timing Role: Supervises 3.3V logic rail after DC-DC startup; holds µC in reset until rail stabilizes for ≥450ms. Use Value: Eliminates spurious I/O initialization and communication errors caused by undervoltage sequencing in noisy factory environments. |
| Smart Home Edge Controllers | Asset Tracking Beacons |
Use Scenario: Battery-powered Zigbee coordinator with deep-sleep wake cycles every 15 minutes. IC Role / Device Role / Timing Role: Detects 1.5V backup rail collapse during primary battery depletion to trigger graceful shutdown and nonvolatile state save. Use Value: Preserves last-known location and sensor history in EEPROM, avoiding data loss during power transition events. |
Use Scenario: GPS-enabled logistics tag powered by Li-SOCl₂ cell with 10-year shelf life requirement. IC Role / Device Role / Timing Role: Provides fail-safe reset during cold-start when temperature-compensated VCC dips transiently below 1.5V at –20°C. Use Value: Ensures deterministic boot sequence across extreme temperatures, preventing firmware lockup in outdoor deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G15DBVR | 1.5V threshold, 350ms delay, 1.1µA IQ, SOT23-6 package | Requires external pull-up and lacks factory-programmed delay; needs additional pin for manual reset input | Select when design requires manual reset capability or tighter delay tolerance (±10% vs. ±20% for APX803L) |
| MAX809SEUR+T | 1.5V threshold, 240ms delay, 10µA IQ, SOT23-3 package | Higher supply current reduces battery lifetime by ~10×; same pinout but different timing and accuracy (±2.5%) | Select only if legacy qualification or second-source validation mandates Maxim compatibility |
Compared with TPS3808G15DBVR and MAX809SEUR+T, the APX803L40-15SA-7 offers superior energy efficiency, guaranteed 450ms timing without external components, and tighter threshold accuracy - making it optimal for next-generation battery-critical and miniaturized embedded systems where BOM simplicity and longevity are prioritized.
Availability
APX803L40-15SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home edge controllers, and asset tracking beacons requiring stable component supply with long-term manufacturability.
Supply support for APX803L40-15SA-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 in Asia, Europe, and the U.S., and manufacturing in ISO/TS 16949-certified facilities.
The APX803L series belongs to Diodes' µP supervisory product line, engineered specifically for ultra-low-power, high-accuracy voltage monitoring in battery-operated and energy-harvesting systems - emphasizing minimal footprint, zero external components, and automotive-grade reliability.
FAQ
What is the exact reset timeout delay for APX803L40-15SA-7?
The APX803L40-15SA-7 has a factory-trimmed reset timeout delay of 450ms (typical), with a specified range of 292ms to 608ms across temperature and process variation. This delay begins when VCC rises above 1.02×VTH and ends when RESET deasserts, ensuring robust power-rail stabilization before system boot.
Can APX803L40-15SA-7 monitor a 3.3V supply directly?
Yes - the device operates from 0.9V to 5.5V and monitors any supply rail up to 5.5V. Its 1.5V threshold is independent of VCC; it asserts RESET when the monitored VCC falls below 1.5V, making it suitable for supervising 3.3V rails where brownout occurs near 1.5V (e.g., post-LDO dropout or battery sag).
Is an external pull-up resistor required on the RESET pin?
Yes - the RESET pin is open-drain and active-low. A pull-up resistor (typically 10kΩ to 100kΩ) must connect between RESET and the target logic rail (e.g., 3.3V or 1.8V) to define the high-state voltage and provide sufficient sink current for the µP's reset input.
Does APX803L40-15SA-7 support operation below –40°C?
No - its specified operating ambient temperature range is –40°C to +85°C. While some units may function below –40°C, electrical characteristics including threshold accuracy (±1.5%), delay timing, and supply current are not guaranteed outside this range per the official DS38171 Rev. 3-2 datasheet.
APX803L40-15SA-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:
- 292ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX803L40-15SA-7 FAQ
1.How can I place an order for APX803L40-15SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L40-15SA-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 APX803L40-15SA-7 reliable?
The price and inventory of APX803L40-15SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L40-15SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L40-15SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L40-15SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L40-15SA-7?
APX803L40-15SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L40-15SA-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 APX803L40-15SA-7?
For technical support, including APX803L40-15SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L40-15SA-7 requirements.
6.How does Aetrix verify that APX803L40-15SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L40-15SA-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 APX803L40-15SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L40-15SA-7?
All APX803L40-15SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L40-15SA-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 APX803L40-15SA-7 part is unused and in its original packaging.
Return procedure for APX803L40-15SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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