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Diodes Incorporated APX803L-13SA-7
- Part No.:
- APX803L-13SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L-13SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,105
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Product details
Overview
APX803L-13SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply rails in embedded digital systems. It features a fixed 1.3V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and no external components required. Used in battery-powered instrumentation and portable electronics where low quiescent power and precise brown-out detection are critical.
For engineers reviewing the APX803L-13SA-7 datasheet, APX803L-13SA-7 pinout, APX803L-13SA-7 application, or APX803L-13SA-7 equivalent, this page delivers verified electrical parameters, SOT23-3 package terminal mapping, timing behavior under voltage transients, and validated alternatives for reset supervisor selection in space-constrained, low-power designs.
Technical Context
The APX803L-13SA-7 implements a precision bandgap-based voltage reference with hysteresis (0.01×VTH) to prevent oscillation during slow VCC recovery. Its internal comparator triggers an open-drain RESET signal when VCC drops below 1.3V, holding low until VCC exceeds 1.3V + hysteresis.
No delay is applied (0ms timeout option), enabling immediate system reset assertion upon undervoltage detection. The device operates across -40°C to +85°C ambient, with supply voltage range 0.9V–5.5V and guaranteed 20µs response time from VCC drop to RESET assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 1.3V ±1.5% - precise brown-out point for 1.8V/2.5V/3.3V logic domains |
| Supply Current | 1.0µA (typ.) - negligible load on coin-cell or energy-harvesting supplies |
| Reset Response Time | 20µs - ensures deterministic µP reset before supply collapse |
| Output Type | Open-drain, active-low - supports wired-OR reset buses and flexible pull-up voltage selection |
| Operating Temp | -40°C to +85°C - qualified for industrial and portable consumer environments |
| Hysteresis | 0.01×VTH (13mV) - prevents chatter during marginal VCC recovery |
| Supply Range | 0.9V to 5.5V - compatible with Li-ion, alkaline, and regulated DC rails |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 1.3mm × 2.9mm footprint, 1.45mm height, gull-wing leads. RoHS-compliant, lead-free, halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Return path for internal reference and comparator; must be low-impedance connection to system ground plane |
| 2 (VCC) | Supply Input | Monitored power rail input; supports 0.9V–5.5V operation with <2.5µA max ICC |
| 3 (RESET) | Open-Drain Output | Active-low reset signal; requires external pull-up (typically 10kΩ to VCC or higher rail); sinks ≥3.5mA at 0.4V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1.0µA typ. enables >10-year battery life in always-on sensor nodes |
| Fixed 1.3V Threshold | Eliminates external resistor network; reduces BOM count and layout area |
| ±1.5% Accuracy | Guarantees reliable reset across temperature without calibration |
| 0ms Delay Option | Immediate assertion on undervoltage-critical for flash memory write protection |
| No External Components | Self-contained solution; no capacitors, resistors, or trimming required |
Applications
| Battery-Powered IoT Sensor Node | Industrial PLC I/O Module |
|---|---|
Use Scenario: Coin-cell powered environmental sensor transmitting data every 5 minutes via BLE. IC Role / Device Role / Timing Role: Monitors 3.0V LDO output; asserts RESET if voltage sags below 1.3V during RF transmission burst. Use Value: Prevents corrupted EEPROM writes by halting MCU execution before supply collapse, using only 1µA standby current. |
Use Scenario: DIN-rail mounted controller with isolated 24V DC input powering 3.3V logic rails. IC Role / Device Role / Timing Role: Supervises primary 3.3V domain; generates clean, glitch-free reset pulse on AC line dropout. Use Value: Ensures deterministic state recovery after brownout, with 20µs response guaranteeing no firmware lockup. |
| Portable Medical Monitor | Smart Energy Meter |
Use Scenario: Handheld ECG device using rechargeable LiPo with fuel gauge and display. IC Role / Device Role / Timing Role: Detects 1.3V threshold on backup supercap rail to initiate graceful shutdown before power loss. Use Value: Enables safe data save and display blanking with zero additional quiescent load on backup supply. |
Use Scenario: Revenue-grade meter with metrology SoC and secure bootloader. IC Role / Device Role / Timing Role: Provides POR and brown-out reset for ARM Cortex-M4 core; interfaces to reset controller via open-drain bus. Use Value: Meets IEC 62056-6-2 reset timing requirements with ±1.5% threshold stability over -25°C to +70°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EA13DBZR | 1.3V threshold, 0.5µA ICC (lower), but only 1.8V–6.0V VCC range; no 0.9V start-up support | Not suitable for sub-1.8V battery systems; better for 3.3V/5V rails with ultra-low ICC priority | Select if VCC ≥1.8V and sub-µA current is mandatory; verify reset timing meets system POR spec |
| MAX809SEUR+T | 1.3V threshold, 10µA ICC (10× higher), SOT23-3 package, 240ms fixed delay (no 0ms option) | Introduces mandatory 240ms reset hold time-unsuitable for fast-recovery or write-protection use cases | Choose only if system requires long debounce; avoid where immediate reset assertion is needed |
Compared with TLV803EA13DBZR and MAX809SEUR+T, the APX803L-13SA-7 uniquely combines 0ms delay, 0.9V minimum VCC operation, and 1µA ICC in a single SOT23-3 package-making it optimal for deeply embedded, battery-critical applications requiring instantaneous undervoltage response.
Availability
APX803L-13SA-7 is available at Aetrix Electronics and suitable for battery-powered IoT sensors, portable medical devices, and industrial control modules requiring stable component supply with long lifecycle visibility.
Supply support for APX803L-13SA-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 manufacturer specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.
The APX803L series belongs to Diodes' precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy reset generation in space- and energy-constrained embedded systems.
FAQ
What is the exact detection threshold voltage of APX803L-13SA-7?
The APX803L-13SA-7 has a factory-trimmed fixed detection threshold of 1.30V with ±1.5% accuracy over temperature (-40°C to +85°C). This value is confirmed in the Electrical Characteristics table (VTH parameter) of DS38171 Rev. 3-2, and applies across the full recommended operating supply range (0.9V–5.5V).
Does APX803L-13SA-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 another logic rail) is mandatory to establish a valid high-level signal when not asserted. The datasheet specifies a maximum sink current of 20mA and guarantees VOL ≤0.4V at ISINK = 3.5mA.
Can APX803L-13SA-7 operate from a 0.9V supply?
Yes. The Recommended Operating Conditions specify a minimum VCC of 0.9V, and the device maintains functional reset detection down to this level. At 0.9V, the internal bandgap reference remains stable, and the 1.3V threshold is enforced relative to the monitored rail-not the supply itself-enabling use in ultra-low-voltage backup domains.
Is there a version of APX803L-13SA-7 with built-in delay?
No. The "-13SA" suffix denotes the base 1.3V variant with 0ms delay. Delayed versions exist as separate orderables: APX803L05-13SA-7 (55ms), APX803L20-13SA-7 (220ms), and APX803L40-13SA-7 (450ms). These share identical threshold and package but differ in internal timing circuitry and part number.
APX803L-13SA-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:
- 1.3V
- 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-13SA-7 FAQ
1.How can I place an order for APX803L-13SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L-13SA-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-13SA-7 reliable?
The price and inventory of APX803L-13SA-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-13SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L-13SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L-13SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L-13SA-7?
APX803L-13SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L-13SA-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-13SA-7?
For technical support, including APX803L-13SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L-13SA-7 requirements.
6.How does Aetrix verify that APX803L-13SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L-13SA-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-13SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L-13SA-7?
All APX803L-13SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L-13SA-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-13SA-7 part is unused and in its original packaging.
Return procedure for APX803L-13SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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