My Inquiry
My Account
Diodes Incorporated APX803L-31W5-7
- Part No.:
- APX803L-31W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
APX803L-31W5-7.pdf
- Description:
- RESET GENERATOR SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:1,548
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
APX803L-31W5-7 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 3.1V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and 220ms reset timeout - enabling reliable power-up sequencing in portable instrumentation and IoT edge nodes.
For engineers reviewing the APX803L-31W5-7 datasheet, APX803L-31W5-7 pinout, APX803L-31W5-7 application, or APX803L-31W5-7 equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options for system-level power monitoring design.
Technical Context
The APX803L-31W5-7 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 3.1V and holds it low until VCC exceeds 3.1V + hysteresis.
It integrates a programmable delay timer (220ms nominal) that begins timing upon VCC recovery, ensuring stable microprocessor reset assertion. No external components are required - the device operates autonomously across -40°C to +85°C ambient temperature with 0.9V to 5.5V supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 3.1V ±1.5% - ensures accurate brown-out detection for 3.3V logic rails without calibration. |
| Supply Current | 1.0µA typical - enables multi-year operation on coin-cell batteries in always-on monitoring applications. |
| Reset Timeout | 220ms (nominal) - provides sufficient hold time for slow-ramping power supplies and FPGA configuration sequences. |
| Output Type | Open-drain, active-low - supports wired-OR reset bus architectures and flexible pull-up voltage selection (up to 5.5V). |
| Response Time | 20µs max - guarantees rapid fault detection before µP state corruption occurs during voltage sag. |
| Operating Temp | -40°C to +85°C - qualified for industrial and extended-temperature portable equipment deployment. |
| Package | SOT25 (5-pin) - provides GND, VCC, RESET, and two NC pins for mechanical stability and layout flexibility. |
Pinout & Package
SOT25 package: 5-pin surface-mount plastic package with exposed pad (not electrically connected); footprint compatible with JEDEC MO-178AB standard. Pin 1 = VCC, Pin 2 = RESET, Pin 3 = GND, Pins 4 & 5 = No Connection (NC).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input; powers internal reference and comparator; must be ≥0.9V for functional operation. |
| 2 | RESET | Open-drain output; pulled low when VCC < 3.1V; requires external pull-up for logic-level compatibility. |
| 3 | GND | Analog and digital ground reference; must be connected directly to system ground plane for noise immunity. |
| 4, 5 | NC | No internal connection; may be left floating or tied to GND for mechanical reinforcement per PCB layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0µA typ. - eliminates measurable impact on battery life in energy-constrained devices. |
| Fixed 3.1V threshold | Factory-trimmed, no external resistor network needed - reduces BOM count and layout area. |
| Hysteresis control | 0.01×VTH (≈31mV) - prevents chatter during slow VCC transitions near threshold. |
| Fast response | 20µs detection-to-output delay - meets tight timing budgets for real-time safety-critical resets. |
| Lead-free & RoHS3 compliant | Fully halogen- and antimony-free - satisfies global environmental compliance requirements for consumer and industrial products. |
Applications
| Smart Wearables | Industrial Sensors |
|---|---|
Use Scenario: Continuous heart-rate monitoring using coin-cell-powered wearable with BLE radio. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET during battery voltage sag below 3.1V to prevent firmware crash or data corruption. Use Value: Ensures deterministic restart after brown-out, preserving sensor calibration integrity and BLE connection state. |
Use Scenario: Remote temperature/humidity node deployed in unattended factory environments. IC Role / Device Role / Timing Role: Monitors 3.3V rail powering MCU and analog front-end; holds RESET for 220ms during transient dips from EMI or load switching. Use Value: Prevents spurious reboots caused by short-duration supply disturbances, improving field reliability. |
| Medical Diagnostic Handhelds | POS Terminal Power Sequencing |
Use Scenario: Portable ultrasound probe requiring guaranteed boot integrity before high-voltage transducer activation. IC Role / Device Role / Timing Role: Supervises main 3.3V supply and asserts active-low RESET to ARM Cortex-M7 until stable; 220ms delay aligns with FPGA configuration time. Use Value: Eliminates risk of partial initialization leading to unsafe transducer drive conditions. |
Use Scenario: Retail point-of-sale terminal with dual-rail (3.3V/5V) power architecture and secure element. IC Role / Device Role / Timing Role: Detects 3.3V rail collapse and generates synchronized RESET pulse to MCU and secure crypto IC via shared open-drain bus. Use Value: Guarantees atomic reset across security-critical subsystems, preventing privilege escalation vulnerabilities. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX803L-31SA-7 | SOT23-3 package (3-pin); identical 3.1V threshold, 220ms delay, and electrical specs. | Limited PCB space; no NC pins - less mechanical robustness and no option for grounding unused terminals. | Select when board area is constrained and thermal dissipation <150mW suffices. |
| TLV803EA31DBZR | Texas Instruments part; same 3.1V threshold but 200ms nominal delay (±20%), 0.5µA supply current. | Higher accuracy over temperature (±0.5% vs ±1.5%) but lacks NC pins and has different pinout (VCC/RESET/GND top-view order). | Choose for ultra-low-power designs where 0.5µA savings outweigh layout redesign cost and qualification effort. |
Compared with APX803L-31W5-7, the SOT23 variant saves board space but sacrifices mechanical stability and grounding flexibility, while the TI TLV803 offers lower current and tighter tempco at the cost of non-drop-in replacement and reduced long-term supply assurance.
Availability
APX803L-31W5-7 is available at Aetrix Electronics and suitable for smart wearables, industrial sensors, medical handhelds, and POS terminals requiring stable component supply with full traceability and lifecycle management.
Supply support for APX803L-31W5-7 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 manufacturing certified to IATF 16949 and quality systems aligned with AEC-Q200 for automotive-grade reliability.
The APX803L series belongs to Diodes' precision power management portfolio, engineered specifically for low-power supervisory functions in battery-operated and energy-sensitive embedded systems.
FAQ
What is the exact reset threshold voltage for APX803L-31W5-7?
The APX803L-31W5-7 has a factory-trimmed detection threshold of 3.1V with ±1.5% accuracy over temperature (-40°C to +85°C). This value is fixed internally and does not require external resistors or configuration. The hysteresis is 0.01×VTH (≈31mV), ensuring clean release above 3.131V.
Can APX803L-31W5-7 drive a 10kΩ pull-up resistor to 5V?
Yes - the open-drain RESET output can sink up to 20mA (absolute max) and is specified to maintain VOL ≤0.4V at ISINK = 3.5mA. With a 10kΩ pull-up to 5V, the resulting sink current is 0.5mA, well within specification and ensuring solid logic-low assertion under all operating conditions.
Is the SOT25 package thermally enhanced compared to SOT23?
No - the SOT25 (5-pin) and SOT23 (3-pin) variants share identical θJA = 200°C/W (JEDEC JESD51-2 standard). The two NC pins in SOT25 provide no thermal benefit but allow improved mechanical anchoring and optional grounding for EMI reduction in high-noise environments.
Does APX803L-31W5-7 require an input capacitor on VCC?
A 100nF ceramic capacitor is recommended between VCC and GND per the typical application circuit in the datasheet. It stabilizes the internal reference and improves noise immunity during fast transients, especially in noisy switch-mode power supply environments - omission may cause false resets under EMI stress.
APX803L-31W5-7 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:
- 3.1V
- 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-31W5-7 FAQ
1.How can I place an order for APX803L-31W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L-31W5-7 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-31W5-7 reliable?
The price and inventory of APX803L-31W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L-31W5-7 is usually 5 days.
3.What payment methods are accepted for APX803L-31W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L-31W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L-31W5-7?
APX803L-31W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L-31W5-7 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-31W5-7?
For technical support, including APX803L-31W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L-31W5-7 requirements.
6.How does Aetrix verify that APX803L-31W5-7 is sourced from the original manufacturer or authorized distributors?
All APX803L-31W5-7 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-31W5-7 meets industry standards.
7.What is the process for return or replacement of APX803L-31W5-7?
All APX803L-31W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L-31W5-7, 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-31W5-7 part is unused and in its original packaging.
Return procedure for APX803L-31W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803L-31W5-7 Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
