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Diodes Incorporated APX803L05-32SA-7
- Part No.:
- APX803L05-32SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L05-32SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,781
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Product details
Overview
APX803L05-32SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 5.0V threshold detection with ±1.5% accuracy, 1µA typical supply current, and 55ms reset timeout. It features open-drain active-low RESET output and operates across –40°C to +85°C ambient range in battery-powered instrumentation and embedded controllers.
For engineers reviewing the APX803L05-32SA-7 datasheet, APX803L05-32SA-7 pinout, APX803L05-32SA-7 application, or APX803L05-32SA-7 equivalent, this device supports critical power-monitoring functions where low quiescent current, tight threshold tolerance, and configurable reset delay are essential for reliable system boot and brownout recovery.
Technical Context
The APX803L05-32SA-7 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 5.0V detection threshold, with built-in hysteresis (0.01×VTH) preventing oscillation during slow-rising/falling supply transitions. Its internal delay timer initiates a 55ms active-low RESET pulse upon VCC drop below threshold and holds until VCC exceeds 5.0V by ≥100mV.
Designed for direct integration into µP reset chains, it requires no external components, delivers sub-20µs response time from VCC breach to RESET assertion, and maintains stable operation under supply voltages from 0.9V to 5.5V - enabling use in systems with wide-input LDOs or battery discharge profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 5.0V ±1.5% - ensures accurate brownout detection at nominal 5V rail without calibration. |
| Supply Current | 1.0µA typical - minimizes load on coin-cell or energy-harvested supplies in always-on monitoring. |
| Reset Timeout | 55ms - provides sufficient hold time for µP initialization while avoiding excessive system hang during transient dips. |
| Response Time | 20µs - guarantees rapid fault signaling before logic corruption occurs during supply collapse. |
| Output Type | Open-drain, active-low - enables wired-OR reset bus sharing and flexible pull-up voltage selection (up to 5.5V). |
| Operating Temp | –40°C to +85°C - supports industrial and automotive cabin-temperature applications without derating. |
| Package | SOT23-3 - surface-mount footprint compatible with high-density PCB layouts and automated assembly. |
Pinout & Package
SOT23-3 package: ultra-small outline transistor (3-pin), 1.3mm × 2.9mm body, 0.95mm height, 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; sinks current when asserted low; requires external pull-up to host logic voltage. |
| 3 | VCC | Power input pin; monitors this rail for threshold violation; decoupling capacitor (100nF) required at pin. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0V threshold | Eliminates external resistor network; reduces BOM count and layout area in space-constrained designs. |
| 55ms factory-programmed delay | Guarantees deterministic reset duration without timing capacitor variability or temperature drift. |
| ±1.5% threshold accuracy | Enables robust margining against 5V ±5% supply tolerances without overdesigning reset window. |
| 1µA supply current | Extends battery life in portable devices by >10× versus legacy reset ICs (e.g., MAX809 variants). |
| No external components | Reduces design validation effort and eliminates risk of capacitor aging or ESD damage on timing nodes. |
Applications
| Industrial PLC I/O Modules | Medical Patient Monitor Sensors |
|---|---|
Use Scenario: Power sequencing and brownout protection for isolated analog front-end ASICs in modular I/O cards. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to halt FPGA configuration until 5V rail stabilizes post-power-up. Use Value: Prevents metastability in digital interfaces by ensuring clean power-good signal before clock enable. |
Use Scenario: Continuous low-power monitoring of 5V supply powering ECG amplifier and ADC subsystems. IC Role / Device Role / Timing Role: Supervisory watchdog that triggers MCU reset if battery-backed 5V rail drops below safe operating level. Use Value: Maintains diagnostic integrity by forcing controlled reboot before analog signal corruption occurs. |
| Smart Energy Meter MCU Core | Automotive Body Control Module (BCM) |
Use Scenario: Monitoring main 5V DC-DC output supplying metrology SoC and real-time clock circuitry. IC Role / Device Role / Timing Role: Reset generator with 55ms timeout aligned to firmware bootloader handshake timing requirements. Use Value: Ensures deterministic startup sequence compliant with IEC 62056-21 metering protocol timing windows. |
Use Scenario: Supervising 5V rail feeding LIN transceiver and door-lock actuator drivers in non-critical BCM zones. IC Role / Device Role / Timing Role: Fault-detection node asserting RESET to microcontroller upon undervoltage condition during cold-crank events. Use Value: Avoids spurious actuator activation by holding MCU in reset until battery recovers above 5.0V threshold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803E50DBVR | 5.0V threshold, 35ms delay, 0.5µA supply current, SOT23-3 | Shorter delay may not meet boot timing margins in slower µPs; lower IQ benefits ultra-low-power designs | Select when minimizing current draw is prioritized over delay flexibility |
| MAX809SEUR+T | 5.0V threshold, 240ms delay, 10µA supply current, SOT23-3 | Longer delay increases system boot latency; higher IQ reduces battery lifetime in always-on use cases | Select only if legacy compatibility or longer reset hold time is required |
Compared with TLV803E50DBVR and MAX809SEUR+T, the APX803L05-32SA-7 delivers optimal balance of low 1µA supply current, industry-standard 55ms reset timeout, and ±1.5% threshold accuracy - making it ideal for new designs requiring both energy efficiency and deterministic power-up behavior.
Availability
APX803L05-32SA-7 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, medical patient monitor sensors, smart energy meter MCU cores, and automotive body control modules requiring stable component supply across multi-year production cycles.
Supply support for APX803L05-32SA-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 manufacturer of discrete semiconductors and integrated circuits, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and automotive markets.
The APX803L series belongs to Diodes' precision voltage supervisor product line, engineered specifically for low-power, high-accuracy power monitoring in battery-operated and energy-sensitive embedded systems.
FAQ
What is the exact reset threshold voltage for APX803L05-32SA-7?
The APX803L05-32SA-7 has a factory-trimmed detection threshold of 5.0V with ±1.5% accuracy over temperature (–40°C to +85°C). This means the actual trip point falls between 4.925V and 5.075V at +25°C, and remains within ±1.5% across the full operating range per datasheet DS38171 Rev. 3-2.
Can APX803L05-32SA-7 drive a 10kΩ pull-up resistor to 3.3V?
Yes - the open-drain RESET output can sink up to 20mA (absolute max), and typical VOL is ≤0.4V at 3.5mA sink current. With a 10kΩ pull-up to 3.3V, the output low voltage remains <0.1V, well within TTL/CMOS logic-low thresholds for reliable interface with 3.3V microcontrollers.
Is a bypass capacitor required on the VCC pin?
Yes - a 100nF ceramic capacitor must be placed as close as possible to the VCC pin (Pin 3) and GND (Pin 1) to suppress high-frequency noise and ensure stable internal reference operation. Omission risks false resets or delayed response during fast transients, as confirmed in the Typical Applications Circuit on page 3 of DS38171.
Does APX803L05-32SA-7 support operation below 1.0V supply?
No - the minimum recommended VCC is 0.9V per Recommended Operating Conditions, but functional reset assertion requires VCC ≥1.02×VTH (≥5.1V for 5.0V threshold). Below 0.9V, the device enters undervoltage lockout and ceases monitoring; it will not assert RESET until VCC rises above 0.9V and then crosses the 5.0V threshold.
APX803L05-32SA-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:
- 35ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX803L05-32SA-7 FAQ
1.How can I place an order for APX803L05-32SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L05-32SA-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 APX803L05-32SA-7 reliable?
The price and inventory of APX803L05-32SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L05-32SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L05-32SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L05-32SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L05-32SA-7?
APX803L05-32SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L05-32SA-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 APX803L05-32SA-7?
For technical support, including APX803L05-32SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L05-32SA-7 requirements.
6.How does Aetrix verify that APX803L05-32SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L05-32SA-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 APX803L05-32SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L05-32SA-7?
All APX803L05-32SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L05-32SA-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 APX803L05-32SA-7 part is unused and in its original packaging.
Return procedure for APX803L05-32SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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