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Diodes Incorporated APX803L-27SR-7
- Part No.:
- APX803L-27SR-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L-27SR-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23R-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
APX803L-27SR-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.7 V reset threshold detection with ±1.5% accuracy, 1 µA typical supply current, and 220 ms active-reset timeout. It features open-drain active-low RESET output and operates across –40°C to +85°C ambient range in battery-powered embedded systems.
For engineers reviewing the APX803L-27SR-7 datasheet, APX803L-27SR-7 pinout, APX803L-27SR-7 application, or APX803L-27SR-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay timing stability over temperature, low-quiescent-current impact on system battery life, and SOT23R package compatibility with high-density PCB layouts.
Technical Context
The APX803L-27SR-7 integrates a precision bandgap reference and comparator with hysteresis (0.01×VTH) to ensure noise-immune power-on reset generation. Its internal fixed 2.7 V threshold is laser-trimmed during wafer test, eliminating external resistor networks.
Reset assertion occurs within 20 µs when VCC drops below 2.7 V, and release requires VCC to exceed 2.7 V + hysteresis (≈2.727 V). The 220 ms timeout variant (indicated by "20" in part number suffix) is factory-configured and stable across –40°C to +85°C per characterization data.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.7 V ±1.5% - ensures reliable µP reset initiation at defined supply rail collapse point |
| Supply Current | 1.0 µA (typ.), 2.5 µA (max.) - enables multi-year operation in coin-cell–powered IoT sensors |
| Reset Timeout | 220 ms (typ.) - meets JEDEC JESD78B minimum reset pulse width for ARM Cortex-M and RISC-V MCUs |
| Response Time | ≤20 µs - guarantees fast fault capture before digital logic enters undefined state |
| Output Type | Open-drain, active-low - supports wired-OR reset bus architectures and flexible pull-up voltage selection |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded controllers and portable medical devices |
| Hysteresis | 0.01×VTH (≈27 mV) - prevents oscillatory reset toggling near threshold during slow VCC ramp-down |
Pinout & Package
SOT23R (3-pin) package: ultra-compact surface-mount outline with 0.95 mm pitch, optimized for automated placement and thermal performance (θJA = 200°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground return path; must be connected directly to low-impedance system ground plane |
| 2 | RESET | Open-drain active-low reset output; requires external pull-up to VCC or higher logic rail |
| 3 | VCC | Power input pin; supplies internal circuitry and monitors monitored supply rail |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Internal threshold and timing eliminate BOM cost and layout area for RC networks |
| Low temperature drift | 50 ppm/°C threshold coefficient ensures <±0.5% total error over full operating range |
| Robust ESD protection | ±4 kV HBM rating protects against handling damage during assembly and field service |
| Lead-free & green compliance | Fully RoHS 3 (2015/863/EU) and halogen-free (<900 ppm Br+Cl), supporting global environmental mandates |
Applications
| Smart Wearables | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous heart-rate monitoring using BLE SoC powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Voltage supervisor asserting reset if battery sags below 2.7 V during RF transmission burst. Use Value: Prevents firmware crash and data corruption while extending usable battery life via sub-µA quiescent draw. |
Use Scenario: DIN-rail mounted controller with isolated 24 V DC input powering FPGA-based logic. IC Role / Device Role / Timing Role: Monitors 3.3 V FPGA core rail; holds reset for 220 ms after brownout recovery to ensure stable configuration load. Use Value: Eliminates need for discrete RC timing network, improving long-term reliability and reducing calibration drift risk. |
| Medical Infusion Pumps | Automotive Body Control Modules |
Use Scenario: Battery-backed infusion pump with dual Li-ion cells and safety-critical motor control. IC Role / Device Role / Timing Role: Supervises 5 V system rail derived from buck converter; triggers hardware reset before voltage drops to unsafe MCU operating level. Use Value: Meets IEC 62304 Class C software safety requirements via deterministic, analog-based reset assertion. |
Use Scenario: 12 V automotive subsystem (e.g., door module) with local 3.3 V LDO powering CAN transceiver and microcontroller. IC Role / Device Role / Timing Role: Detects LDO dropout during cold-crank event; asserts reset until stable 3.3 V is restored for 220 ms. Use Value: Ensures CAN node reinitializes cleanly post-cranking without bus arbitration errors or message loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX803L-27SA-7 | SOT23 (non-R variant); identical electrical specs but different leadframe geometry and marking layout | Same footprint compatibility but requires separate stencil design due to slight pad dimension variance | Select SA for legacy board revisions where SOT23 land pattern matches Diodes' standard footprint. |
| TLV803EB27DBVR | Texas Instruments part; 2.7 V threshold, 200 ms timeout, 0.5 µA IQ, but ±2.5% accuracy and no hysteresis spec | Lower IQ benefits ultra-low-power designs, but reduced accuracy may require margining in tight supply rails | Choose TLV803EB27DBVR only when sub-0.5 µA supply current is mandatory and ±2.5% threshold tolerance is acceptable. |
Compared with APX803L-27SA-7, the -27SR-7 offers identical supervision functionality in a refined SOT23R package with enhanced manufacturability; versus TLV803EB27DBVR, it trades 0.5 µA lower IQ for tighter ±1.5% threshold accuracy and guaranteed hysteresis-critical for noisy automotive or industrial rails.
Availability
APX803L-27SR-7 is available at Aetrix Electronics and suitable for smart wearables, industrial PLC I/O modules, medical infusion pumps, and automotive body control modules requiring stable component supply across extended product lifecycles.
Supply support for APX803L-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, with design centers in Asia, Europe, and the U.S., and manufacturing in ISO/TS 16949-certified facilities.
The APX803L series belongs to Diodes' Power Management portfolio, engineered specifically for ultra-low-power, high-accuracy reset supervision in space-constrained, battery-sensitive applications like portable medical and IoT edge devices.
FAQ
What is the exact reset threshold voltage for APX803L-27SR-7?
The APX803L-27SR-7 has a factory-trimmed nominal reset threshold of 2.70 V with ±1.5% initial accuracy at +25°C, confirmed in Electrical Characteristics table of DS38171 Rev. 3–2. Temperature coefficient is 50 ppm/°C, yielding ≤±0.5% total variation across –40°C to +85°C.
Can APX803L-27SR-7 drive a 10 kΩ pull-up resistor reliably?
Yes. With VOL ≤0.4 V at ISINK = 3.5 mA (per datasheet), the device can sink >100 µA at 0.4 V drop into a 10 kΩ pull-up to 3.3 V. This exceeds typical MCU reset input leakage (<1 µA), ensuring clean logic-low assertion under all operating conditions.
Does APX803L-27SR-7 require an input capacitor on VCC?
A 100 nF ceramic bypass capacitor is recommended per Typical Applications Circuit in DS38171. It stabilizes the internal reference and suppresses high-frequency noise that could cause false resets, especially in switching power supply environments.
Is APX803L-27SR-7 qualified for automotive use?
No. While rated for –40°C to +85°C, APX803L-27SR-7 is not AEC-Q100 qualified. Diodes offers automotive-grade alternatives (e.g., APX809 series) with PPAP support and IATF 16949 manufacturing; contact Diodes sales for qualified variants.
APX803L-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:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT23R
APX803L-27SR-7 FAQ
1.How can I place an order for APX803L-27SR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L-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 APX803L-27SR-7 reliable?
The price and inventory of APX803L-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 APX803L-27SR-7 is usually 5 days.
3.What payment methods are accepted for APX803L-27SR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L-27SR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L-27SR-7?
APX803L-27SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L-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 APX803L-27SR-7?
For technical support, including APX803L-27SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L-27SR-7 requirements.
6.How does Aetrix verify that APX803L-27SR-7 is sourced from the original manufacturer or authorized distributors?
All APX803L-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 APX803L-27SR-7 meets industry standards.
7.What is the process for return or replacement of APX803L-27SR-7?
All APX803L-27SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L-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 APX803L-27SR-7 part is unused and in its original packaging.
Return procedure for APX803L-27SR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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