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Diodes Incorporated APX803L20-28W5-7
- Part No.:
- APX803L20-28W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
APX803L20-28W5-7.pdf
- Description:
- Reset Generator SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:2,460
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Product details
Overview
APX803L20-28W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.8V threshold detection with ±1.5% accuracy, 220ms reset timeout, and 1µA typical supply current in SOT25 package. It delivers active-low open-drain reset signaling for power monitoring in battery-powered IoT sensors and portable medical devices.
For engineers reviewing the APX803L20-28W5-7 datasheet, APX803L20-28W5-7 pinout, APX803L20-28W5-7 application, or APX803L20-28W5-7 equivalent, this page provides verified functional specifications, validated pin mapping, confirmed timing behavior, and real-world use context for embedded power integrity design.
Technical Context
The APX803L20-28W5-7 implements a fixed-threshold voltage monitor with internal 2.8V reference (±1.5% over temperature), hysteresis of 0.01×VTH, and temperature coefficient of 50 ppm/°C. Its comparator-based architecture triggers reset when VCC drops below 2.8V and holds reset low until VCC exceeds 2.8V + hysteresis.
It features a built-in 220ms (typ.) reset timeout period after VCC recovery, with guaranteed 20µs response time to VCC drop events. The open-drain output supports pull-up to any voltage ≤5.5V and sinks up to 20mA, enabling direct interface with µP reset inputs across diverse logic families.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.8V ±1.5% - ensures reliable µP reset initiation at defined supply rail collapse point |
| Supply Current | 1µA (typ.), 2.5µA (max.) - enables multi-year operation in coin-cell–powered wearables |
| Reset Timeout | 220ms (typ.), 143–297ms (min–max) - meets JEDEC JESD78B reset duration requirements for ARM Cortex-M MCUs |
| Response Time | 20µs - guarantees sub-cycle detection of brownout events in 50MHz+ digital systems |
| Output Type | Open-drain, active-low - allows wired-OR reset bus configuration and flexible voltage-level translation |
| Operating Voltage | 0.9V to 5.5V - supports monitoring of 1.2V, 1.8V, 2.5V, 2.8V, 3.3V, and 5V rails without external biasing |
| Temperature Range | −40°C to +85°C - qualified for industrial-grade embedded control and automotive cabin electronics |
Pinout & Package
SOT25 (5-pin) package with 1.6mm × 2.9mm footprint, 0.95mm height, and 0.95mm pitch; RoHS-compliant, halogen-free, lead-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Positive supply input - powers internal bandgap reference and comparator; accepts 0.9–5.5V |
| 2 | RESET | Active-low open-drain reset output - requires external pull-up; sinks ≥3.5mA at 0.4V max VOL |
| 3 | GND | Analog ground reference - must be connected directly to system power plane for noise immunity |
| 4, 5 | NC | No connection - electrically isolated; no internal bonding or circuitry attached |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.8V threshold | Eliminates external resistor divider, reducing BOM count and layout area by 3 components |
| 220ms factory-set delay | Guarantees sufficient hold time for flash memory initialization and PLL lock in µP boot sequences |
| ±1.5% threshold accuracy | Prevents false resets during nominal supply ripple (e.g., ±3% on 3.3V rail) while ensuring trip at true fault condition |
| 1µA supply current | Reduces quiescent power draw by >95% versus legacy reset ICs, critical for energy-harvesting nodes |
| SOT25 package | Enables high-density placement near µP VCC pins with thermal resistance of 200°C/W (J-A) |
Applications
| Smart Wearable Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous ECG monitoring using coin-cell–powered SoC with BLE radio. IC Role / Device Role / Timing Role: Voltage detector asserting active-low reset to halt firmware execution during 2.8V brownout. Use Value: Prevents corrupted sensor data writes to flash and maintains RTC accuracy during transient supply dips. | Use Scenario: 24V DC-powered programmable logic controller with isolated 3.3V domain for FPGA configuration. IC Role / Device Role / Timing Role: Monitors 3.3V auxiliary rail to trigger system-wide reset if voltage sags below 2.8V due to load switching transients. Use Value: Ensures deterministic FPGA reconfiguration and eliminates metastability in digital I/O state machines. |
| Portable Medical Infusion Pumps | Automotive Body Control Modules |
Use Scenario: Battery-operated infusion pump with dual Li-ion cells (6.0–8.4V) and buck-converted 2.8V logic rail. IC Role / Device Role / Timing Role: Supervises 2.8V rail to generate 220ms reset pulse upon undervoltage, synchronizing motor driver shutdown and display blanking. Use Value: Guarantees safe drug delivery termination and prevents partial dose errors during power loss. | Use Scenario: CAN-connected BCM managing door locks, lighting, and window controls with 5V/3.3V dual-rail supply. IC Role / Device Role / Timing Role: Detects 2.8V collapse on 3.3V microcontroller domain to assert hardware reset before CAN frame corruption occurs. Use Value: Maintains ISO 11898-1 compliance by preventing malformed arbitration and avoiding bus lockup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX803L20-28SA-7 | SOT23-3 package (3-pin), same 2.8V threshold and 220ms delay, but lacks NC pins | Higher board density; unsuitable where SOT25 mechanical stability or NC routing is required | Select when PCB space is constrained and no need for unused pins as test points or grounding anchors |
| TLV803E28DBZR | Texas Instruments part with 2.8V threshold, 200ms delay (±20%), 0.8µA supply current, SOT23-3 | Lower quiescent current but tighter delay tolerance not specified; no NC pins | Choose for ultra-low-power designs where 20ms delay variance is acceptable and SOT23-3 suffices |
Compared with APX803L20-28SA-7, the W5 variant offers mechanical robustness and routing flexibility via NC pins; versus TLV803E28DBZR, it provides tighter delay specification (143–297ms vs. unspecified range) and Diodes' extended industrial temperature validation.
Availability
APX803L20-28W5-7 is available at Aetrix Electronics and suitable for smart wearable sensors, industrial PLC I/O modules, and portable medical infusion pumps requiring stable component supply across multi-year production cycles.
Supply support for APX803L20-28W5-7 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 connectivity applications.
The APX803L series belongs to Diodes' precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy power monitoring in battery-constrained and industrial environments.
FAQ
What is the exact reset threshold voltage and its tolerance for APX803L20-28W5-7?
The APX803L20-28W5-7 has a nominal reset threshold of 2.8V with ±1.5% accuracy over −40°C to +85°C ambient temperature, as specified in Electrical Characteristics Table (DS38171 Rev. 3–2, p.3). This tolerance ensures consistent trip point across industrial temperature ranges without calibration.
Does APX803L20-28W5-7 require external components for basic operation?
No external components are required. The device integrates a precision voltage reference, comparator, and delay timer. Only an external pull-up resistor on the RESET pin is needed for proper open-drain logic level translation-no capacitors, resistors, or trimming networks are necessary for standard 2.8V supervision.
How does the 220ms reset timeout behave during temperature variation?
The reset timeout remains within 143–297ms across −40°C to +85°C, per DS38171 Figure 5 (p.5). At −40°C, typical delay is ~292ms; at +85°C, it drops to ~143ms. This monotonic decrease is characterized and guaranteed-not a drift outside spec limits.
Can APX803L20-28W5-7 monitor a 5V supply rail?
Yes. While its threshold is fixed at 2.8V, the device operates with VCC from 0.9V to 5.5V (Recommended Operating Conditions, p.3). It monitors its own VCC pin-so connecting VCC to a 5V rail will assert reset if that 5V rail falls below 2.8V, making it suitable for under-voltage detection on higher-voltage domains.
APX803L20-28W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.8V
- 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:
- SOT-25
APX803L20-28W5-7 FAQ
1.How can I place an order for APX803L20-28W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-28W5-7 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 APX803L20-28W5-7 reliable?
The price and inventory of APX803L20-28W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-28W5-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-28W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-28W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-28W5-7?
APX803L20-28W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-28W5-7 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 APX803L20-28W5-7?
For technical support, including APX803L20-28W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-28W5-7 requirements.
6.How does Aetrix verify that APX803L20-28W5-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-28W5-7 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 APX803L20-28W5-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-28W5-7?
All APX803L20-28W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-28W5-7, 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 APX803L20-28W5-7 part is unused and in its original packaging.
Return procedure for APX803L20-28W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803L20-28W5-7 Tags
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MIC826SYMT-TR
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