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Diodes Incorporated APX803L-14SA-7
- Part No.:
- APX803L-14SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L-14SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:1,522
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Product details
Overview
APX803L-14SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply rails in battery-powered and embedded digital systems. It features a fixed 1.4V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and 0ms reset timeout delay. Used in portable instrumentation and low-power microcontroller power-up sequencing.
For engineers reviewing the APX803L-14SA-7 datasheet, APX803L-14SA-7 pinout, APX803L-14SA-7 application, or APX803L-14SA-7 equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options - all grounded in Diodes Incorporated's DS38171 Rev. 3–2 specification.
Technical Context
The APX803L-14SA-7 implements a precision bandgap-based voltage reference with hysteresis (0.01×VTH) to prevent oscillation during threshold crossing. Its internal comparator triggers an open-drain RESET signal when VCC drops below 1.4V and holds it until VCC exceeds 1.4V + hysteresis.
No external components are required; the device operates across -40°C to +85°C ambient, supports 0.9V to 5.5V supply range, and delivers sub-20µs response time from VCC drop to RESET assertion - critical for reliable µP initialization in energy-constrained systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 1.4V ±1.5% - ensures accurate brown-out detection for 1.8V/3.3V I/O domain logic without calibration. |
| Supply Current | 1.0µA typical - enables multi-year operation on coin-cell batteries in always-on monitoring applications. |
| Reset Timeout Delay | 0ms - provides immediate reset assertion upon undervoltage, suitable for fast-recovery systems requiring minimal hold time. |
| Output Type | Open-drain, active-low - allows wired-OR configuration with other reset sources and flexible pull-up voltage selection (up to 5.5V). |
| Response Time | <20µs - guarantees µP reset initiation before supply collapse compromises register state integrity. |
| Operating Temp | -40°C to +85°C - supports industrial-grade deployment in uncontrolled ambient environments. |
| Package | SOT23-3 - surface-mount footprint compatible with high-density PCB layouts and automated assembly. |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 1.3mm × 2.9mm × 1.0mm body, gull-wing leads, RoHS-compliant matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground return path; must be connected directly to system power plane for noise immunity. |
| 2 | RESET | Open-drain output; requires external pull-up to define logic-high level and sink capability up to 20mA. |
| 3 | VCC | Power input pin; supplies internal circuitry and monitors the same rail it protects - no separate sense line. |
Key Features
| Feature | Design Value |
|---|---|
| Threshold Accuracy | ±1.5% over temperature - eliminates need for system-level trimming in cost-sensitive consumer designs. |
| No External Components | Self-contained detection and timing - reduces BOM count and layout area versus RC-based reset generators. |
| Low-Temp Drift | 50ppm/°C threshold coefficient - maintains stable trip point across automotive cabin and industrial operating ranges. |
| ESD Robustness | ±4000V HBM - withstands handling and board-level ESD events without latch-up or parametric shift. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose meters and pulse oximeters require guaranteed reset at power-on and brown-out to prevent corrupted sensor readings or false alarms. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to microcontroller during VCC ramp-up and undervoltage events. Use Value: 1µA quiescent current extends single-CR2032 battery life beyond 5 years in sleep mode; 1.4V threshold aligns with Li-ion discharge cutoff. |
Use Scenario: Programmable logic controllers monitor 24V DC field power rails converted to 3.3V logic supplies; transient dips must trigger controlled firmware restart. IC Role / Device Role / Timing Role: Primary reset source tied to regulated 3.3V rail, interfacing with ARM Cortex-M7 MCU reset pin via 10kΩ pull-up. Use Value: -40°C to +85°C rating ensures reliability in factory-floor enclosures; ±1.5% accuracy avoids spurious resets near nominal 3.3V. |
| Smart Home Hub Power Sequencing | Wearable Fitness Tracker Boot Integrity |
Use Scenario: Multi-rail hubs (5V USB, 3.3V SoC, 1.8V memory) require coordinated reset timing; APX803L-14SA-7 supervises the 3.3V domain. IC Role / Device Role / Timing Role: Standalone supervisor providing clean, glitch-free reset pulse to application processor after 3.3V stabilizes. Use Value: 0ms delay enables fastest possible boot sequence; open-drain output allows shared reset bus with other supervisors. |
Use Scenario: Fitness bands using rechargeable Li-poly cells experience deep discharge cycles; reset must activate before core logic enters undefined state. IC Role / Device Role / Timing Role: Dedicated VDD supervisor for Nordic nRF52832 SoC, asserting RESET when cell voltage falls below 1.4V during discharge. Use Value: Sub-20µs response prevents register corruption; SOT23-3 footprint fits tight 8mm × 12mm wearable PCB constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EA14DBVR | 1.4V threshold, 350ms default delay (fixed), 0.5µA IQ - lower current but non-zero delay. | Not suitable where immediate reset assertion is required (e.g., FPGA configuration loading). | Select if longer reset hold time improves system stability and ultra-low IQ dominates design priority. |
| MAX809SEUR+T | 1.4V threshold, ±2.5% accuracy, 1.2µA IQ, SOT23-3 - looser tolerance and higher current than APX803L-14SA-7. | Acceptable for non-critical consumer devices where 1.4V ±2.5% meets margin requirements. | Choose only if legacy MAX809 footprint compatibility is mandatory and ±1.5% accuracy is not required. |
Compared with TLV803EA14DBVR and MAX809SEUR+T, the APX803L-14SA-7 uniquely combines ±1.5% threshold accuracy, 1µA IQ, and 0ms delay in SOT23-3 - making it optimal for high-reliability, low-power, fast-response µP supervision where timing precision and battery longevity are co-constrained.
Availability
APX803L-14SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub power sequencing, and wearable fitness tracker boot integrity requiring stable component supply and long-term manufacturability.
Supply support for APX803L-14SA-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 manufacturing certified to IATF 16949 and quality compliance to AEC-Q100/101 standards.
The APX803L series belongs to Diodes' µP supervisory product line, engineered specifically for ultra-low-power, high-accuracy voltage monitoring in battery-operated and space-constrained embedded systems.
FAQ
What is the exact detection threshold voltage of APX803L-14SA-7?
The APX803L-14SA-7 has a factory-trimmed detection threshold of 1.4V with ±1.5% accuracy over temperature (-40°C to +85°C). This value is fixed internally and cannot be adjusted externally - confirmed in Electrical Characteristics Table (DS38171 Rev. 3–2, page 4).
Does APX803L-14SA-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 10kΩ to 3.3V or 5V) is mandatory to establish a valid logic-high level. The datasheet specifies maximum sink current of 20mA and VOL ≤ 0.4V at 3.5mA (page 4).
Can APX803L-14SA-7 operate from a 1.2V supply rail?
No - the minimum recommended VCC is 0.9V, but functional reset detection requires VCC ≥ 1.02×VTH (i.e., ≥1.428V) to guarantee proper internal biasing. At 1.2V, the device powers but cannot assert or release RESET reliably per Recommended Operating Conditions (page 3).
Is APX803L-14SA-7 qualified for automotive applications?
No - while Diodes offers AEC-Q100-qualified variants in the APX803L family (e.g., APX803L-XXSA-7Q), the standard APX803L-14SA-7 is rated for industrial temperature range (-40°C to +85°C) and lacks PPAP documentation or IATF 16949-controlled manufacturing traceability per the datasheet notes (page 1).
APX803L-14SA-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:
- 1.4V
- 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-14SA-7 FAQ
1.How can I place an order for APX803L-14SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L-14SA-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-14SA-7 reliable?
The price and inventory of APX803L-14SA-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-14SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L-14SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L-14SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L-14SA-7?
APX803L-14SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L-14SA-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-14SA-7?
For technical support, including APX803L-14SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L-14SA-7 requirements.
6.How does Aetrix verify that APX803L-14SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L-14SA-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-14SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L-14SA-7?
All APX803L-14SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L-14SA-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-14SA-7 part is unused and in its original packaging.
Return procedure for APX803L-14SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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