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Diodes Incorporated APX803L-36SA-7
- Part No.:
- APX803L-36SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L-36SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
APX803L-36SA-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 3.6V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and 220ms reset timeout - enabling reliable power-up sequencing in battery-powered IoT sensors and portable medical devices.
For engineers reviewing the APX803L-36SA-7 datasheet, APX803L-36SA-7 pinout, APX803L-36SA-7 application, or APX803L-36SA-7 equivalent, this page delivers verified specifications, SOT23 package layout, real-world use cases, and validated alternative parts for industrial-grade power monitoring designs requiring low quiescent current and precise reset timing.
Technical Context
The APX803L-36SA-7 implements a precision bandgap-based voltage reference with internal hysteresis (0.01×VTH) to prevent oscillation during supply ramp-up/down. Its comparator continuously monitors VCC against the factory-trimmed 3.6V threshold and asserts RESET when VCC drops below that level.
Reset assertion remains active until VCC exceeds 3.6V + hysteresis (≈3.636V), after which the built-in 220ms recovery delay ensures stable system boot before releasing the microprocessor. The open-drain output supports flexible pull-up configurations and direct interface with µP reset inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Voltage | 3.6V ±1.5% - factory-trimmed threshold ensures accurate brown-out detection without external resistors |
| Supply Current | 1.0µA typical - enables multi-year operation in coin-cell–powered devices without compromising battery life |
| Reset Timeout | 220ms (typ.) - provides sufficient hold time for slow-ramping power supplies and flash memory initialization |
| Output Type | Open-drain, active-low - allows wired-OR configuration and compatibility with 1.8V–5.5V logic families |
| Response Time | 20µs max - guarantees fast fault response during transient supply dips |
| Operating Range | VCC = 0.9V to 5.5V - supports wide-input systems including Li-ion, USB, and regulated 3.3V rails |
| Temperature Range | −40°C to +85°C - qualified for industrial ambient conditions without derating |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 1.3mm × 2.9mm footprint, surface-mount, RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Return path for internal circuitry; must be connected to system ground plane for stable threshold accuracy |
| 2 (RESET) | Open-Drain Output | Active-low reset signal; requires external pull-up resistor (typically 10kΩ) to host VCC rail |
| 3 (VCC) | Supply Input | Monitored power rail input; powers internal circuitry and defines operating voltage range (0.9–5.5V) |
Key Features
| Feature | Design Value |
|---|---|
| Fixed Threshold Accuracy | ±1.5% over −40°C to +85°C - eliminates need for calibration or trimming in production |
| No External Components | Self-contained detection circuit - reduces BOM count and PCB area vs. resistor-divider solutions |
| Low-Temp Drift | 50 ppm/°C threshold coefficient - maintains tight trip point across industrial temperature range |
| Hysteresis | 0.01×VTH (≈36mV at 3.6V) - prevents chatter during marginal supply conditions |
| ESD Robustness | ±4000V HBM - withstands handling and board-level ESD events without latch-up or parametric shift |
Applications
| Smart Wearable Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Continuous heart-rate monitoring using ultra-low-power MCU and analog front-end powered by CR2032 battery. IC Role / Device Role / Timing Role: Voltage supervisor ensuring clean reset during battery voltage sag below 3.6V during RF transmission bursts. Use Value: Prevents firmware corruption by holding MCU in reset until supply recovers fully, leveraging 220ms timeout to accommodate transient load-induced droop. |
Use Scenario: DIN-rail mounted remote I/O node with isolated 24V DC input converted to 3.3V for microcontroller and fieldbus transceivers. IC Role / Device Role / Timing Role: Primary VCC monitor on 3.3V rail, asserting reset if upstream DC-DC converter fails or experiences overvoltage/undervoltage. Use Value: Guarantees deterministic startup and safe shutdown via open-drain RESET tied to both MCU and FPGA reset controllers, avoiding metastability. |
| Portable Medical Diagnostic Tools | Automotive Body Control Modules (Non-AEC-Q) |
|
Use Scenario: Handheld blood glucose meter with LCD display, Bluetooth LE, and electrochemical sensor interface. IC Role / Device Role / Timing Role: Power-on reset generator triggered only when main 3.6V LDO output stabilizes above 3.6V after cold start. Use Value: Eliminates need for RC-based reset timers; 1µA quiescent current extends shelf life of sealed units with primary lithium batteries. |
Use Scenario: Aftermarket LED lighting controller with CAN bus interface and PWM dimming, powered from vehicle 12V battery via buck regulator. IC Role / Device Role / Timing Role: Secondary supervision of 5V logic rail to detect brown-out during engine cranking (battery dip to ~9V). Use Value: Enables graceful firmware save-to-EEPROM before reset, using 220ms window to complete critical writes before power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB36DBZR | 3.6V threshold, 0.8µA IQ, 200ms delay, SOT23-3 - tighter ±0.5% accuracy but no hysteresis spec listed | Preferred where higher accuracy outweighs need for guaranteed noise immunity; requires external hysteresis design if used in noisy environments | Select when absolute threshold tolerance is critical and board space allows minor redesign for hysteresis |
| MAX809SEUR+T | 3.6V threshold, 12µA IQ, 240ms delay, SOT23-3 - higher supply current, wider temp range (−40°C to +125°C) | Better suited for under-hood automotive modules needing extended temperature support, but less efficient for battery-constrained designs | Choose for high-temp industrial applications where 12µA IQ is acceptable and AEC-Q200 qualification is not required |
Compared with TLV803EB36DBZR and MAX809SEUR+T, the APX803L-36SA-7 delivers optimal balance of ultra-low power (1µA), robust hysteresis (36mV), and industrial-grade temperature stability - making it ideal for cost-sensitive, long-life portable electronics where every nanoamp counts.
Availability
APX803L-36SA-7 is available at Aetrix Electronics and suitable for smart wearables, industrial I/O modules, and portable medical diagnostics requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for APX803L-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 ICs, with leadership in power management, signal integrity, and protection devices.
The APX803L series belongs to Diodes' µP supervisory product line, engineered specifically for ultra-low-power, high-accuracy reset generation in battery-operated and energy-conscious embedded systems.
FAQ
What is the exact reset threshold voltage for APX803L-36SA-7?
The APX803L-36SA-7 has a factory-trimmed detection threshold of 3.6V with ±1.5% accuracy over −40°C to +85°C. At 25°C, the typical value is 3.6V, and the min/max range is 3.546V to 3.654V per datasheet DS38171 Rev. 3-2 Section 4 (Electrical Characteristics).
Can APX803L-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 resulting sink current is 0.5mA, well within specification and ensuring solid logic-low assertion.
Does APX803L-36SA-7 require an external capacitor for stability?
No - the device contains fully integrated circuitry with no external compensation required. The datasheet explicitly states "No External Components Required" and validates operation with only a 100nF bypass capacitor on VCC, per Typical Applications Circuit on page 3.
Is APX803L-36SA-7 qualified for automotive applications?
No - APX803L-36SA-7 is not AEC-Q100 qualified. Diodes Incorporated offers separate automotive-grade variants (e.g., APX803L-36SA-7Q) with PPAP capability and IATF 16949 manufacturing; this part is intended for industrial and consumer applications only.
APX803L-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:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX803L-36SA-7 FAQ
1.How can I place an order for APX803L-36SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L-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 APX803L-36SA-7 reliable?
The price and inventory of APX803L-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 APX803L-36SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L-36SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L-36SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L-36SA-7?
APX803L-36SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L-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 APX803L-36SA-7?
For technical support, including APX803L-36SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L-36SA-7 requirements.
6.How does Aetrix verify that APX803L-36SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L-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 APX803L-36SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L-36SA-7?
All APX803L-36SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L-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 APX803L-36SA-7 part is unused and in its original packaging.
Return procedure for APX803L-36SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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