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Diodes Incorporated APX803L20-27SR-7
- Part No.:
- APX803L20-27SR-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L20-27SR-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23R-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,869
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Product details
Overview
APX803L20-27SR-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply levels in battery-powered and embedded digital systems. It features a fixed 2.7V detection threshold (±1.5% accuracy), 1µA typical supply current, 220ms reset timeout, open-drain active-low RESET output, and operates across –40°C to +85°C ambient range.
For engineers reviewing the APX803L20-27SR-7 datasheet, APX803L20-27SR-7 pinout, APX803L20-27SR-7 application, or APX803L20-27SR-7 equivalent, key selection criteria include threshold voltage precision, ultra-low quiescent current, reset delay timing stability over temperature, and SOT23R package compatibility with space-constrained PCB layouts.
Technical Context
The APX803L20-27SR-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 2.7V and holds it asserted until VCC exceeds the release threshold (2.7V + hysteresis).
Reset assertion occurs within 20µs of VCC falling below threshold, and the device supports four factory-programmed delay options - this variant uses the 220ms timeout (typ. 143–297ms over temperature), enabling reliable power-up sequencing in microcontroller-based systems without external RC components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 2.7V ±1.5% - ensures accurate brown-out detection for 3.3V I/O domain systems |
| Supply Current | 1.0µA (typ.), 2.5µA (max.) - enables multi-year operation in coin-cell-powered IoT sensors |
| Reset Delay | 220ms (typ.), 143–297ms (–40°C to +85°C) - provides stable power-up hold time for ARM Cortex-M boot sequences |
| Output Type | Open-drain, active-low - allows wired-OR reset bus sharing and flexible pull-up voltage selection (up to 5.5V) |
| Response Time | ≤20µs - guarantees fast fault reaction before µP state corruption during supply collapse |
| Operating Voltage | 0.9V to 5.5V - supports direct connection to Li-ion battery rails (2.7–4.2V) and logic supplies |
| Temperature Range | –40°C to +85°C - qualified for industrial and automotive cabin applications |
Pinout & Package
SOT23R (3-pin, RoHS-compliant, lead-free) package with 1.3mm × 2.9mm footprint and 0.95mm height - optimized for automated placement and high-density routing on compact PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 | RESET | Open-drain active-low reset output; requires external pull-up resistor (typically 10kΩ to 3.3V/5V) |
| 3 | VCC | Power input pin; supplies internal reference and comparator; decoupling capacitor (100nF) required at pin |
Key Features
| Feature | Design Value |
|---|---|
| No external components needed | Internal voltage reference, hysteresis, and delay timing eliminate BOM cost and layout area for RC networks |
| High threshold accuracy | ±1.5% tolerance ensures consistent reset behavior across production lots and temperature |
| Ultra-low supply current | 1µA typ. minimizes battery drain in always-on monitoring applications like smart meters and wearables |
| Fast response time | 20µs detection-to-assertion latency prevents µP lockup during transient supply dips |
| RoHS & green compliance | Totally lead-free, halogen- and antimony-free - meets IPC-1752A and EU Directive 2015/863/EU requirements |
Applications
| Smartphone Power Sequencing | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors main PMIC output (3.3V rail) during cold start and battery recovery cycles. IC Role / Device Role / Timing Role: Voltage supervisor providing reset hold-off until stable 3.3V is established for application processor boot. Use Value: Prevents firmware execution under marginal voltage, eliminating boot failures and NAND flash corruption. | Use Scenario: Supervises 24V-to-5V DC/DC converter output powering FPGA configuration circuitry. IC Role / Device Role / Timing Role: Generates 220ms reset pulse to ensure FPGA completes configuration before enabling peripherals. Use Value: Eliminates need for discrete RC timer; improves timing repeatability across temperature and unit variance. |
| Wireless Sensor Node | Automotive Body Control Module |
Use Scenario: Detects voltage sag on CR2032 coin cell (2.0–3.0V range) in BLE beacon hardware. IC Role / Device Role / Timing Role: Triggers MCU reset when battery falls below 2.7V to preserve sensor calibration data. Use Value: 1µA quiescent current extends usable battery life beyond 5 years in sleep-dominated operation. | Use Scenario: Monitors 5V supply to LIN transceiver and door-lock actuator driver ICs. IC Role / Device Role / Timing Role: Provides fail-safe reset during load-dump transients or alternator regulation faults. Use Value: ±1.5% threshold accuracy ensures consistent trip point across vehicle production batches and aging conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB27DBVR | 2.7V threshold, 350ms delay (fixed), 0.5µA IQ, SOT23-3 package | Lacks temperature-stable delay; no hysteresis spec provided | Prefer for ultra-low-IQ designs where longer reset hold time is acceptable |
| MAX809SEUR+T | 2.7V threshold, 140ms delay (min), 10µA IQ, SOT23-3 package | Higher supply current; wider delay tolerance (140–400ms); no hysteresis spec | Acceptable for non-battery applications where IQ >1µA is tolerable |
Compared with TLV803EB27DBVR and MAX809SEUR+T, the APX803L20-27SR-7 delivers superior thermal stability of reset delay (±77ms over –40°C to +85°C), tighter threshold accuracy (±1.5% vs. ±2.5%), and lower supply current than MAX809 while maintaining identical SOT23R footprint and pinout.
Availability
APX803L20-27SR-7 is available at Aetrix Electronics and suitable for industrial PLCs, battery-powered IoT sensors, automotive body electronics, and portable medical devices requiring stable component supply and long-term lifecycle support.
Supply support for APX803L20-27SR-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 for power management, signal integrity, and protection applications.
The APX803L series belongs to Diodes' µP supervisory product line, engineered specifically for ultra-low-power, high-accuracy voltage monitoring in space- and energy-constrained embedded systems.
FAQ
What is the exact reset threshold voltage and its tolerance for APX803L20-27SR-7?
The APX803L20-27SR-7 has a nominal reset threshold of 2.7V with a guaranteed accuracy of ±1.5% over temperature (–40°C to +85°C) and supply voltage (0.9V to 5.5V), corresponding to a range of 2.6595V to 2.7405V at +25°C per datasheet DS38171 Rev. 3-2.
Does APX803L20-27SR-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 4.7kΩ to 10kΩ) to the monitored supply or another logic rail is mandatory to generate a valid high-level signal during normal operation.
Can APX803L20-27SR-7 operate from a 1.8V supply?
No - the minimum operating supply voltage is 0.9V, but the 2.7V detection threshold requires VCC ≥ 2.7V to function as intended; operation below 2.7V results in continuous RESET assertion, making it unsuitable for direct supervision of 1.8V rails.
Is APX803L20-27SR-7 qualified for automotive applications?
This specific variant is not AEC-Q100 qualified; however, Diodes offers automotive-grade versions (e.g., APX803L20-27SR-7Q) with PPAP capability, IATF 16949 manufacturing, and extended temperature screening - contact Diodes or Aetrix for qualified alternatives.
APX803L20-27SR-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:
- 2.7V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 143ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT23R
APX803L20-27SR-7 FAQ
1.How can I place an order for APX803L20-27SR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-27SR-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 APX803L20-27SR-7 reliable?
The price and inventory of APX803L20-27SR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-27SR-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-27SR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-27SR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-27SR-7?
APX803L20-27SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-27SR-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 APX803L20-27SR-7?
For technical support, including APX803L20-27SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-27SR-7 requirements.
6.How does Aetrix verify that APX803L20-27SR-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-27SR-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 APX803L20-27SR-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-27SR-7?
All APX803L20-27SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-27SR-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 APX803L20-27SR-7 part is unused and in its original packaging.
Return procedure for APX803L20-27SR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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