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Diodes Incorporated APX803L-32SA-7
- Part No.:
- APX803L-32SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L-32SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,723
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Product details
Overview
APX803L-32SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply levels in embedded digital systems. It features a fixed 3.2V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and 220ms built-in recovery delay. Used in battery-powered instrumentation and portable electronics requiring precise, low-burden power-on reset.
For engineers reviewing the APX803L-32SA-7 datasheet, APX803L-32SA-7 pinout, APX803L-32SA-7 application, or APX803L-32SA-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-32SA-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 3.2V and holds it low until VCC exceeds 3.2V + hysteresis, with guaranteed 20µs response time.
This variant uses the SOT23-3 package with pin 1 = GND, pin 2 = RESET (active-low, open-drain), pin 3 = VCC. It belongs to the APX803L20 subfamily, delivering a factory-programmed 220ms reset timeout after VCC recovery - confirmed by identification code A432 and ordering suffix "20" in full part number decoding.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 3.2V ±1.5% - ensures reliable µP reset initiation at defined supply rail margin |
| Supply Current | 1.0µA (typ.) - enables multi-year operation in coin-cell–powered devices without measurable battery drain |
| Reset Timeout | 220ms - provides sufficient hold time for slow-ramping power supplies and stable processor initialization |
| Output Type | Open-drain, active-low - allows wired-OR reset bus configuration and flexible pull-up voltage selection |
| Response Time | 20µs - guarantees fast fault detection before digital logic enters undefined states |
| Operating Voltage | 0.9V to 5.5V - supports direct monitoring of 1.2V–3.3V logic rails and legacy 5V systems |
| Temperature Range | -40°C to +85°C - qualified for industrial and extended commercial ambient environments |
Pinout & Package
SOT23-3 package (3-pin, surface-mount, 1.3mm × 2.9mm footprint) with gull-wing leads; RoHS-compliant, lead-free, halogen-free construction per Diodes Incorporated green standards.
| 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 resistor to define logic-high level and sink capability |
| 3 | VCC | Input supply pin; powers internal reference and comparator; also the monitored voltage source |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Self-contained reset generation eliminates need for RC timing networks or external comparators |
| High threshold accuracy | ±1.5% over temperature ensures consistent reset behavior across -40°C to +85°C without calibration |
| Ultra-low quiescent current | 1.0µA typ. enables integration into always-on subsystems without compromising battery life |
| Programmable delay variants | Factory-set 220ms timeout (APX803L20 series) matches typical FPGA/ASIC power-rail stabilization profiles |
| Robust ESD protection | ±4000V HBM rating protects against handling damage during PCB assembly and field service |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG sensor operating from CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Monitors 3.0V LDO output; asserts RESET if voltage sags below 3.2V due to pulse load or battery depletion. Use Value: Prevents firmware crash during brown-out by enforcing clean restart before analog front-end misreads. |
Use Scenario: DIN-rail mounted remote I/O unit powered by 24VDC-to-3.3V isolated converter. IC Role / Device Role / Timing Role: Supervises 3.3V logic rail; holds µC in reset for 220ms while DC/DC stabilizes after power-up or transient dip. Use Value: Eliminates spurious I/O state changes during power sequencing, ensuring deterministic startup. |
| Smart Home Hub Controllers | Automotive Body Control Modules (Non-AEC) |
Use Scenario: Wi-Fi–enabled home automation hub using dual-supply SoC (1.1V core, 3.3V I/O). IC Role / Device Role / Timing Role: Detects 3.3V I/O rail integrity; generates synchronized reset pulse to coordinate peripheral initialization. Use Value: Guarantees GPIOs and communication interfaces are held inactive until stable, avoiding bus contention. |
Use Scenario: Aftermarket lighting controller powered from vehicle 12V battery via buck regulator. IC Role / Device Role / Timing Role: Monitors regulated 5.0V domain; triggers reset on cranking-induced dips below 3.2V. Use Value: Maintains functional safety by forcing controlled reboot instead of erratic LED pattern execution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX803L-32SR-7 | Same 3.2V threshold and 220ms delay, but SOT23R package (reversed pinout: pin1=VCC, pin2=GND, pin3=RESET) | Requires PCB layout revision; incompatible with SA footprint without redesign | Select only if leveraging existing SOT23R land pattern or needing alternate thermal profile. |
| TLV803EA32DBZR | 3.2V threshold, 200ms delay, 0.6µA supply current, same SOT23-3 pinout (pin1=GND, pin2=RESET, pin3=VCC) | Higher accuracy (±0.5%), lower ICC, but no automotive qualification; not AEC-Q100 rated | Preferred for ultra-low-power designs where tighter tolerance justifies TI sourcing and cost premium. |
Compared with APX803L-32SA-7, the SR variant demands board-level rework for pin compatibility, while TLV803EA32DBZR offers superior accuracy and lower current but lacks Diodes' extended temperature validation and green compliance documentation traceability.
Availability
APX803L-32SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub controllers, and automotive body control modules requiring stable component supply across production lifecycles.
Supply support for APX803L-32SA-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., serving industrial, computing, and consumer markets.
The APX803L series targets cost-sensitive, space-constrained µP supervision in battery-powered and embedded systems - emphasizing ultra-low ICC, factory-programmed thresholds, and drop-in replacement capability for legacy reset ICs.
FAQ
What is the exact reset threshold voltage for APX803L-32SA-7?
The APX803L-32SA-7 has a factory-trimmed detection threshold of 3.2V with ±1.5% accuracy over -40°C to +85°C, confirmed by Diodes' DS38171 Rev. 3-2 datasheet Section 5 (Electrical Characteristics) and ordering code "32" in the part number.
Does APX803L-32SA-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 VCC or host logic rail) is mandatory to establish a valid high-level voltage and enable proper reset signaling to the microprocessor.
Can APX803L-32SA-7 operate from a 1.8V supply?
No - the minimum operating VCC is 0.9V, but the 3.2V detection threshold requires the monitored supply to reach at least 3.2V. It cannot supervise 1.8V rails; for that, a 1.8V-threshold variant like APX803L-18SA-7 would be required.
Is APX803L-32SA-7 qualified for automotive applications?
No - while Diodes offers AEC-Q100–qualified versions in other APX803L configurations (e.g., APX803L-32SA-7Q), the standard APX803L-32SA-7 is rated for industrial temperature range (-40°C to +85°C) and is not PPAP-capable or manufactured in IATF 16949–certified facilities per datasheet Note 4.
APX803L-32SA-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:
- 3.2V
- 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-32SA-7 FAQ
1.How can I place an order for APX803L-32SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L-32SA-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-32SA-7 reliable?
The price and inventory of APX803L-32SA-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-32SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L-32SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L-32SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L-32SA-7?
APX803L-32SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L-32SA-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-32SA-7?
For technical support, including APX803L-32SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L-32SA-7 requirements.
6.How does Aetrix verify that APX803L-32SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L-32SA-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-32SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L-32SA-7?
All APX803L-32SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L-32SA-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-32SA-7 part is unused and in its original packaging.
Return procedure for APX803L-32SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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