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Diodes Incorporated APX803L-43W5-7
- Part No.:
- APX803L-43W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
APX803L-43W5-7.pdf
- Description:
- RESET GENERATOR SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:4,856
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Product details
Overview
APX803L-43W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply levels in embedded and battery-powered systems. It features a fixed 4.3V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and 220ms reset timeout. Used in portable instrumentation and low-power microcontroller power-up sequencing.
For engineers reviewing the APX803L-43W5-7 datasheet, APX803L-43W5-7 pinout, APX803L-43W5-7 application, or APX803L-43W5-7 equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options - all grounded in Diodes Incorporated's DS38171 Rev. 3-2 specification.
Technical Context
The APX803L-43W5-7 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 4.3V and holds it low until VCC exceeds the release threshold (VTH + hysteresis).
It integrates a factory-programmed 220ms recovery delay (APX803L20 variant), operates from 0.9V to 5.5V supply, and delivers sub-20µs reset assertion latency. No external components are required - the device functions as a self-contained power-on reset (POR) and brown-out detection (BOD) solution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Voltage | 4.3V ±1.5% - precise brown-out threshold for 4.5V nominal rails, ensuring reliable µP reset before logic corruption. |
| Supply Current | 1.0µA (typ.) - enables multi-year operation in coin-cell–powered devices without compromising battery life. |
| Reset Timeout | 220ms - provides sufficient hold time for slow-ramping supplies and stable clock initialization in µC systems. |
| Output Type | Open-drain, active-low - supports wired-OR reset buses and flexible pull-up voltage selection (up to 5.5V). |
| Response Time | <20µs - guarantees rapid fault capture during transient undervoltage events. |
| Operating Temp | −40°C to +85°C - qualified for industrial and extended-temperature embedded applications. |
| Hysteresis | 0.01×VTH (≈43mV) - prevents chatter near threshold during noisy or slowly recovering supply conditions. |
Pinout & Package
SOT25 (5-pin) package with two NC pins; compact footprint compatible with high-density PCB layouts while maintaining thermal performance (θJA = 200°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be connected to system ground plane. |
| 2 | RESET | Open-drain active-low reset output; requires external pull-up to define logic-high level and drive strength. |
| 3 | VCC | Power input pin; supplies internal circuitry and senses monitored voltage rail directly. |
| 4, 5 | NC | No connection - left unconnected per datasheet; no internal bonding or function. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1.0µA typical supply current enables integration into always-on sensor nodes and energy-harvesting systems. |
| Fixed 4.3V Threshold | Factory-trimmed detection point eliminates external resistor networks and calibration overhead. |
| 220ms Delay Option | Internally generated timing ensures consistent reset duration across temperature and voltage variations. |
| Open-Drain Output | Allows shared reset bus architecture and interface with mixed-voltage logic families (e.g., 1.8V/3.3V/5V domains). |
| RoHS & Green Compliant | Fully lead-free, halogen- and antimony-free construction meets IEC 61249-2-21 and JEDEC JS709E standards. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered glucose meters requiring guaranteed reset on cold-start and low-battery brownout. IC Role / Device Role / Timing Role: Power-on reset generator and supply monitor; asserts RESET until VCC stabilizes above 4.3V and holds for 220ms. Use Value: Prevents firmware execution from corrupted memory states during marginal battery voltage transitions. |
Use Scenario: DIN-rail mounted I/O expansion modules operating from 5V DC input with variable load transients. IC Role / Device Role / Timing Role: Brown-out detector tied to 5V rail; triggers system-wide reset if input dips below 4.3V due to cable drop or surge. Use Value: Eliminates need for discrete RC timing networks and improves reset repeatability across temperature (-40°C to +85°C). |
| Smart Home Hub Controllers | Asset Tracking Beacons |
|
Use Scenario: Wi-Fi/BLE hub with dual-rail power (3.3V core, 5V USB) where 3.3V LDO may sag under RF transmit load. IC Role / Device Role / Timing Role: Monitors 3.3V domain via resistive divider scaled to 4.3V input; provides clean reset pulse to SoC. Use Value: Enables accurate voltage scaling without adding quiescent current from external supervisor ICs. |
Use Scenario: GPS-enabled logistics tag powered by CR2032 coin cell, waking every 15 minutes for location burst transmission. IC Role / Device Role / Timing Role: Supervises main 3.0V supply rail; detects end-of-life voltage collapse and forces controlled shutdown. Use Value: Extends usable battery life by avoiding premature resets and enabling graceful state save before power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803E43DBVR | 4.3V threshold, 0.5µA ICC (lower), but only 0ms/200ms delay options; SOT-23-3 package (no NC pins). | Requires external RC network for non-standard delays; less suitable for space-constrained 5-pin layouts. | Prefer when ultra-low current dominates over package compatibility and delay granularity. |
| MAX809SEUR+T | 4.3V threshold, 15µA ICC (15× higher), 240ms delay, same SOT-23-3 footprint. | Higher supply current limits use in multi-year battery applications; thermal derating needed above 70°C. | Choose only if legacy MAX809 qualification or second-source validation is mandatory. |
Compared with TLV803E43DBVR and MAX809SEUR+T, the APX803L-43W5-7 uniquely balances ultra-low ICC (1µA), precise 220ms timing, and SOT25 packaging - delivering optimal fit for next-gen compact, long-life embedded supervisors where pin count and power efficiency are co-constrained.
Availability
APX803L-43W5-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and smart home hub controllers requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for APX803L-43W5-7 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 across Asia, Europe, and the U.S., serving industrial, computing, consumer, and communications markets.
The APX803L series belongs to Diodes' µP supervisory product line, engineered specifically for low-power, high-accuracy reset generation in battery-operated and thermally demanding embedded systems.
FAQ
What is the exact detection threshold voltage of APX803L-43W5-7?
The APX803L-43W5-7 has a factory-trimmed detection threshold of 4.3V with ±1.5% accuracy over temperature (−40°C to +85°C), corresponding to the "43" in the part number and confirmed in Electrical Characteristics Table on page 3 of DS38171 Rev. 3-2.
Does APX803L-43W5-7 require external components to operate?
No. The device operates autonomously with only VCC, GND, and RESET connections. Its 4.3V threshold is internally fixed, the 220ms delay is factory-programmed, and the open-drain output requires only an external pull-up resistor - no capacitors or resistors for timing or threshold setting are needed.
Can APX803L-43W5-7 be used with a 3.3V supply rail?
Yes - but only when monitoring a scaled voltage. Since its detection threshold is 4.3V, a resistive divider must be used to map the 3.3V rail to 4.3V at the VCC pin (e.g., 3.3V × (R1+R2)/R2 = 4.3V). Direct connection to 3.3V will not trigger reset, as VCC must exceed 4.3V for release.
What does the "W5" in APX803L-43W5-7 signify?
"W5" denotes the SOT25 package per Diodes' ordering guide (page 7 of DS38171): a 5-pin variant with pins 1=GND, 2=RESET, 3=VCC, and pins 4–5 as NC. This differs from SOT23/SOT323/SC59 variants and enables layout flexibility in dense designs where 3-pin packages cause routing congestion.
APX803L-43W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.3V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 0ms Typical
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
APX803L-43W5-7 FAQ
1.How can I place an order for APX803L-43W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L-43W5-7 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-43W5-7 reliable?
The price and inventory of APX803L-43W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L-43W5-7 is usually 5 days.
3.What payment methods are accepted for APX803L-43W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L-43W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L-43W5-7?
APX803L-43W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L-43W5-7 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-43W5-7?
For technical support, including APX803L-43W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L-43W5-7 requirements.
6.How does Aetrix verify that APX803L-43W5-7 is sourced from the original manufacturer or authorized distributors?
All APX803L-43W5-7 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-43W5-7 meets industry standards.
7.What is the process for return or replacement of APX803L-43W5-7?
All APX803L-43W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L-43W5-7, 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-43W5-7 part is unused and in its original packaging.
Return procedure for APX803L-43W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803L-43W5-7 Tags
-
MIC826SYMT-TR
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