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Diodes Incorporated APX803L40-36SA-7
- Part No.:
- APX803L40-36SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L40-36SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,941
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Product details
Overview
APX803L40-36SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 3.6V threshold detection with ±1.5% accuracy, 1µA typical supply current, and 450ms reset timeout. It features open-drain active-low RESET output and operates across –40°C to +85°C ambient range in battery-powered IoT sensors and portable medical devices.
For engineers reviewing the APX803L40-36SA-7 datasheet, APX803L40-36SA-7 pinout, APX803L40-36SA-7 application, or APX803L40-36SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, low-quiescent-current impact on system battery life, and SOT23 package compatibility with high-density PCB layouts.
Technical Context
The APX803L40-36SA-7 implements a precision bandgap-based voltage reference with internal hysteresis (0.01×VTH) to prevent oscillation during VCC recovery. Its comparator architecture triggers reset when VCC drops below 3.6V and holds RESET low until VCC exceeds 3.618V (VTH + VHYS).
Reset assertion occurs within 20µs of VCC crossing the falling threshold, and the fixed 450ms timeout ensures reliable processor initialization after brownout. The open-drain output supports wired-OR configuration and external pull-up flexibility up to 5.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 3.6V ±1.5% - guarantees deterministic reset activation at precisely defined supply rail margin |
| Supply Current | 1.0µA typical - enables multi-year operation in coin-cell–powered wearables without measurable battery drain |
| Reset Timeout | 450ms - satisfies ARM Cortex-M boot timing requirements and avoids premature firmware execution |
| Response Time | 20µs - ensures immediate fault capture during fast transients, critical for real-time control loops |
| Operating Temp | –40°C to +85°C - validated for industrial-grade embedded systems deployed in uncontrolled environments |
| Output Type | Open-drain, active-low - allows level-shifting, shared-bus reset signaling, and compatibility with 1.8V–5V logic families |
Pinout & Package
APX803L40-36SA-7 is housed in a RoHS-compliant 3-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), optimized for automated placement and thermal performance (θJA = 200°C/W). Pin 1 is GND, Pin 2 is RESET (open-drain), and Pin 3 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground return path; must be connected to system power plane with low-impedance trace |
| 2 | RESET | Active-low open-drain output; requires external pull-up resistor (typically 10kΩ to VCC or higher logic rail) |
| 3 | VCC | Power input pin; accepts 0.9V–5.5V supply; decoupling capacitor (100nF) required within 2mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Fixed Threshold Accuracy | ±1.5% at +25°C - eliminates need for external trimming resistors or calibration in production test |
| Temperature Coefficient | 50 ppm/°C - maintains <±2.5% total threshold drift over full –40°C to +85°C operating range |
| No External Components | Self-contained detection circuit - reduces BOM count, PCB area, and assembly cost vs. discrete comparator solutions |
| Lead-Free & Green | Halogen- and antimony-free (<900ppm Br+Cl, <1000ppm Sb) - meets IPC-1752A material declaration and automotive ELV compliance |
Applications
| Smart Wearable Sensor Node | Industrial PLC I/O Module |
|---|---|
Use Scenario: Continuous ECG monitoring powered by CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Voltage supervisor ensuring MCU reset before brownout-induced memory corruption during battery discharge. Use Value: 1µA quiescent current extends battery life to >2 years; 450ms timeout prevents false wakeups from transient noise. |
Use Scenario: DIN-rail mounted programmable logic controller with 24V DC input and isolated 3.3V logic rail. IC Role / Device Role / Timing Role: Power-on reset generator for ARM-based controller, synchronized with fieldbus communication startup sequence. Use Value: ±1.5% threshold accuracy ensures consistent reset behavior across wide ambient temperature swings in factory environments. |
| Portable Diagnostic Ultrasound Probe | Automotive Cabin Camera ECU |
Use Scenario: Handheld ultrasound device using Li-ion battery and low-noise analog front-end. IC Role / Device Role / Timing Role: Monitors 1.8V analog supply to trigger controlled shutdown before ADC reference collapse. Use Value: 20µs response time captures fast supply dips caused by pulsed Doppler transmit bursts, preserving image integrity. |
Use Scenario: AEC-Q200–qualified camera module for driver monitoring, powered from vehicle 12V via buck converter. IC Role / Device Role / Timing Role: Supervises 3.3V core rail to enforce safe boot after cold crank or load dump events. Use Value: Validated operation to +85°C ambient supports under-hood mounting; open-drain output interfaces directly with SoC reset pin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803E36DBVR | 3.6V threshold, ±2.5% accuracy, 350ms timeout, 0.5µA IQ | Lower accuracy and shorter timeout; no hysteresis spec provided | Prefer for ultra-low-power designs where 450ms is excessive and ±2.5% tolerance is acceptable |
| MAX809SEUR+T | 3.6V threshold, ±2.0% accuracy, 240ms timeout, 12µA IQ | Higher supply current; only available in SOT23-3 but lacks extended temp rating | Choose if legacy MAXIM footprint compatibility is required and 12µA IQ is tolerable in system budget |
Compared with TLV803E36DBVR and MAX809SEUR+T, APX803L40-36SA-7 delivers tighter threshold accuracy (±1.5% vs. ±2.0–2.5%), longer and more stable timeout (450ms vs. 240–350ms), and lower supply current than MAX809 while maintaining industrial temperature support.
Availability
APX803L40-36SA-7 is available at Aetrix Electronics and suitable for smart wearable sensor nodes, industrial PLC I/O modules, portable diagnostic ultrasound probes, and automotive cabin camera ECUs requiring stable component supply across long production lifecycles.
Supply support for APX803L40-36SA-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 targets ultra-low-power supervisory functions in space-constrained, battery-sensitive applications-designed specifically to replace discrete reset circuits in portable, medical, and industrial edge devices.
FAQ
What is the exact reset threshold voltage for APX803L40-36SA-7?
The APX803L40-36SA-7 has a nominal reset threshold of 3.6V with guaranteed accuracy of ±1.5% over temperature (–40°C to +85°C), meaning the actual trip point falls between 3.546V and 3.654V at +25°C and remains within ±2.5% over full operating range due to 50 ppm/°C temperature coefficient.
Can APX803L40-36SA-7 drive a 10kΩ pull-up resistor to 5V?
Yes-the open-drain RESET output is rated for 20mA sink current and guarantees VOL ≤ 0.4V at ISINK = 3.5mA. With a 10kΩ pull-up to 5V, the output will reliably reach <0.1V when asserted, satisfying standard CMOS logic low thresholds across all process corners and temperatures.
Is there a recommended bypass capacitor value and placement for APX803L40-36SA-7?
A 100nF ceramic capacitor is specified in the datasheet and must be placed within 2mm of the VCC and GND pins. This minimizes high-frequency impedance and prevents false resets caused by supply rail ringing during digital switching events on adjacent circuits.
Does APX803L40-36SA-7 meet automotive qualification standards?
No-APX803L40-36SA-7 is not AEC-Q100 qualified. Diodes Incorporated offers automotive-grade variants (e.g., APX803L40-36SA-7Q) with PPAP documentation, IATF 16949 manufacturing, and extended temperature screening; contact Diodes sales for qualified part numbers.
APX803L40-36SA-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:
- 3.6V
- 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
APX803L40-36SA-7 FAQ
1.How can I place an order for APX803L40-36SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L40-36SA-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 APX803L40-36SA-7 reliable?
The price and inventory of APX803L40-36SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L40-36SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L40-36SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L40-36SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L40-36SA-7?
APX803L40-36SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L40-36SA-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 APX803L40-36SA-7?
For technical support, including APX803L40-36SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L40-36SA-7 requirements.
6.How does Aetrix verify that APX803L40-36SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L40-36SA-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 APX803L40-36SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L40-36SA-7?
All APX803L40-36SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L40-36SA-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 APX803L40-36SA-7 part is unused and in its original packaging.
Return procedure for APX803L40-36SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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