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Diodes Incorporated APX803L20-31W5-7
- Part No.:
- APX803L20-31W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
APX803L20-31W5-7.pdf
- Description:
- Reset Generator SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:2,907
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Product details
Overview
APX803L20-31W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 3.1V threshold detection with ±1.5% accuracy, 220ms reset timeout, and 1µA typical supply current in a 3-pin 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 APX803L20-31W5-7 datasheet, APX803L20-31W5-7 pinout, APX803L20-31W5-7 application, or APX803L20-31W5-7 equivalent, key selection criteria include fixed 3.1V detection level, guaranteed 220ms (min 143ms / max 297ms) reset delay at +25°C, open-drain output drive capability up to 20mA, and operation across -40°C to +85°C ambient range.
Technical Context
The APX803L20-31W5-7 implements a precision bandgap-based voltage reference with built-in hysteresis (0.01×VTH) to prevent reset chatter during supply ramp-up/down. Its internal comparator continuously monitors VCC against the factory-trimmed 3.1V threshold and asserts RESET low when VCC falls below VTH–100mV within 20µs.
Reset assertion remains active until VCC rises above VTH+0.01×VTH, after which the device enforces a fixed 220ms recovery timeout before releasing RESET high-impedance - a timing value validated across temperature (-40°C to +125°C) and supply voltage (0.9V to 5.5V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 3.1V ±1.5% at +25°C; ensures reliable reset initiation for 3.3V logic rails with margin against noise-induced false triggers |
| Supply Current | 1.0µA typical, 2.5µA max; enables multi-year operation in coin-cell-powered wearables without measurable battery drain |
| Reset Timeout | 220ms nominal (143–297ms range); provides sufficient hold time for microcontroller initialization sequences in embedded systems |
| Response Time | ≤20µs from VCC drop to RESET assertion; guarantees fast fault capture during brown-out events |
| Output Type | Open-drain, active-low; supports wired-OR reset bus architectures and flexible pull-up voltage selection (up to 5.5V) |
| Operating Temp | -40°C to +85°C ambient; qualified for industrial-grade deployment in automotive cabin modules and smart home hubs |
Pinout & Package
SOT25 (3-pin, 1.6mm × 2.9mm × 1.1mm) package with gull-wing leads, RoHS-compliant matte tin plating, and thermal resistance θJA = 200°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground return path; must be connected directly to system power plane with minimal trace inductance |
| 2 | RESET | Open-drain output; sinks up to 20mA when asserted low; requires external pull-up resistor for logic-level compatibility |
| 3 | VCC | Power input pin; accepts 0.9V–5.5V supply; internal regulation enables stable threshold performance across input range |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Single-chip solution eliminates need for resistive divider, capacitor timing network, or external reference - reduces BOM count and PCB area by ≥3 components |
| Fixed 3.1V detection threshold | Factory-trimmed via laser adjustment; avoids calibration overhead and tolerance stack-up in production test |
| Four factory-programmed delay options | 220ms option ('20' suffix) matches standard µC boot-time requirements without software configuration or external RC tuning |
| High accuracy over temperature | ±1.5% threshold tolerance maintained from -40°C to +85°C; eliminates need for derating or guard-banding in thermal design |
Applications
| Smart Wearable Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor with CR2032 battery and ARM Cortex-M0+ MCU. IC Role / Device Role / Timing Role: Voltage detector asserting RESET during battery sag below 3.1V to prevent corrupted flash writes or sensor data loss. Use Value: 1µA quiescent current extends battery life beyond 24 months; 220ms timeout ensures full MCU register initialization before firmware execution. |
Use Scenario: DIN-rail mounted digital input module operating in factory environments with 24VDC supply and transient surges. IC Role / Device Role / Timing Role: Supervisory circuit monitoring local 3.3V LDO output feeding FPGA configuration logic. Use Value: ±1.5% threshold accuracy prevents nuisance resets during 24V line ripple; open-drain output interfaces directly to FPGA's dedicated reset pin. |
| Medical Infusion Pumps | Automotive Telematics Units |
Use Scenario: Battery-backed infusion pump controller requiring fail-safe shutdown on main supply failure. IC Role / Device Role / Timing Role: Primary reset source triggering controlled motor stop and alarm activation when 3.3V rail collapses. Use Value: 20µs response time captures rapid transients from ESD events; -40°C to +85°C rating covers clinical storage and operating conditions. |
Use Scenario: LTE-connected telematics control unit powered from vehicle battery (9–16V) with internal 3.3V domain. IC Role / Device Role / Timing Role: Monitoring post-regulator 3.3V supply to ensure clean reset during cold-crank voltage dips. Use Value: 220ms timeout exceeds ISO 16750-2 cold-crank profile duration; hysteresis prevents oscillation during slow VCC recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803E31DBVR | 3.1V threshold, 200ms timeout, 0.5µA IQ, SOT23-3 package | Lacks guaranteed min/max timeout spec; tighter IQ benefit only relevant in ultra-low-power sub-µA sleep modes | Select if board space is constrained and 200ms vs. 220ms timing variance is acceptable |
| MAX809SEUR+T | 3.08V threshold, 240ms timeout, 12µA IQ, SOT23-3 package | Higher supply current increases battery load; 3.08V threshold may cause earlier reset than 3.1V in marginal 3.3V systems | Select only if legacy MAX809 footprint compatibility is mandatory and higher IQ is tolerable |
Compared with TLV803E31DBVR and MAX809SEUR+T, the APX803L20-31W5-7 offers superior threshold accuracy (±1.5% vs. ±2.5% and ±2.0%), tighter timeout consistency (143–297ms vs. ±30% and ±50%), and lower supply current than MAX809 - making it optimal for precision-critical, long-life battery applications.
Availability
APX803L20-31W5-7 is available at Aetrix Electronics and suitable for smart wearable sensors, industrial PLC I/O modules, and medical infusion pumps requiring stable component supply with guaranteed long-term availability.
Supply support for APX803L20-31W5-7 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 for power management, signal integrity, and protection applications.
The APX803L series belongs to Diodes' precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy power monitoring in battery-operated and industrial embedded systems.
FAQ
What is the exact reset threshold voltage of APX803L20-31W5-7?
The APX803L20-31W5-7 has a factory-trimmed detection threshold of 3.1V with ±1.5% accuracy over temperature (-40°C to +85°C), verified per DS38171 Rev. 3-2 Electrical Characteristics table. This value is fixed and non-adjustable, matching the '31' code in the part number.
Does APX803L20-31W5-7 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 to the monitored logic rail (e.g., 3.3V or 5V) is mandatory. Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements.
Can APX803L20-31W5-7 operate from a 1.8V supply?
No - the minimum recommended VCC is 0.9V, but the 3.1V threshold requires VCC ≥ 3.1V to function correctly. At 1.8V, the internal reference cannot establish valid comparison, and RESET will remain asserted indefinitely.
Is APX803L20-31W5-7 qualified for automotive applications?
This specific variant is not AEC-Q100 qualified. Diodes offers automotive-grade versions (e.g., APX803L20-31W5-7Q) with PPAP documentation and IATF 16949 manufacturing - contact Aetrix or Diodes for qualified alternatives if automotive use is required.
APX803L20-31W5-7 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:
- 3.1V
- 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
APX803L20-31W5-7 FAQ
1.How can I place an order for APX803L20-31W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-31W5-7 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 APX803L20-31W5-7 reliable?
The price and inventory of APX803L20-31W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-31W5-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-31W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-31W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-31W5-7?
APX803L20-31W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-31W5-7 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 APX803L20-31W5-7?
For technical support, including APX803L20-31W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-31W5-7 requirements.
6.How does Aetrix verify that APX803L20-31W5-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-31W5-7 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 APX803L20-31W5-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-31W5-7?
All APX803L20-31W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-31W5-7, 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 APX803L20-31W5-7 part is unused and in its original packaging.
Return procedure for APX803L20-31W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803L20-31W5-7 Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
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