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Diodes Incorporated APX803L20-29C3-7
- Part No.:
- APX803L20-29C3-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
APX803L20-29C3-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:5,966
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Product details
Overview
APX803L20-29C3-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.9V threshold detection with ±1.5% accuracy, 1µA typical supply current, and 220ms reset timeout. It features open-drain active-low RESET output and operates across –40°C to +85°C in battery-powered instrumentation and portable electronics.
For engineers reviewing the APX803L20-29C3-7 datasheet, APX803L20-29C3-7 pinout, APX803L20-29C3-7 application, or APX803L20-29C3-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, low-quiescent-current operation in sleep mode, and SOT323 package compatibility with space-constrained PCB layouts.
Technical Context
The APX803L20-29C3-7 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 2.9V threshold. Its internal hysteresis (0.01×VTH) prevents oscillation during slow-rising or noisy supply transitions.
Reset assertion occurs within 20µs of VCC falling below 2.9V, and the active-low open-drain output remains asserted until VCC exceeds 2.9V + hysteresis. The 220ms timeout variant ensures reliable processor initialization in systems with slow power-rail ramp-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 2.9V ±1.5% - Ensures consistent reset activation across production units and temperature. |
| Supply Current | 1.0µA typical - Enables multi-year operation on coin-cell batteries without measurable drain. |
| Reset Timeout | 220ms (typ.) - Guarantees sufficient hold time for full µP boot sequence before release. |
| Response Time | 20µs max - Provides fast fault detection to prevent corrupted memory writes or logic states. |
| Operating Voltage | 0.9V to 5.5V - Supports monitoring of 1.2V–3.3V logic rails and legacy 5V subsystems. |
| Output Type | Open-drain, active-low - Allows wired-OR configuration and flexible pull-up voltage selection (up to 5.5V). |
| Temperature Range | –40°C to +85°C - Validated for industrial and extended-temperature portable equipment use. |
Pinout & Package
SOT323 package (3-pin, 1.3mm × 1.3mm footprint), surface-mount, lead-free and RoHS-compliant. Thermal resistance θJA = 275°C/W supports operation at full rating without heatsinking in standard FR-4 PCBs.
| 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 signal; requires external pull-up resistor to host VCC or I/O rail. |
| 3 | VCC | Power input pin; supplies internal circuitry and enables detection function above 0.9V. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Internal threshold and timing eliminate need for resistors, capacitors, or trimming-reducing BOM count and layout area. |
| High threshold accuracy | ±1.5% over temperature ensures deterministic reset behavior without calibration in production test. |
| Ultra-low supply current | 1.0µA typ. allows integration into always-on monitoring paths without impacting system standby power budget. |
| Fast response time | 20µs detection-to-reset propagation enables real-time protection against brownout-induced data corruption. |
| Multiple package options | SOT323 footprint matches high-density portable designs while maintaining thermal performance comparable to larger packages. |
Applications
| Battery-Powered Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Continuous glucose monitor operating from CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Supervises 3.0V LDO output to assert RESET if voltage sags below 2.9V during RF burst, preventing firmware crash. Use Value: 1µA quiescent current extends battery life beyond 2 years; 220ms timeout accommodates LDO transient recovery. |
Use Scenario: DIN-rail mounted analog input module powered by 24VDC-to-3.3V isolated converter. IC Role / Device Role / Timing Role: Monitors 3.3V logic rail to hold µC in reset during cold-start until power stabilizes post-surge. Use Value: ±1.5% threshold accuracy eliminates field failures due to marginal supply variation; SOT323 fits tight board spacing. |
| Smart Home Hub Power Sequencing | Automotive Telematics ECU |
|
Use Scenario: Dual-rail hub (1.8V core, 3.3V I/O) requiring coordinated power-up sequencing. IC Role / Device Role / Timing Role: Detects 3.3V rail to enable 1.8V regulator only after stable 3.3V is confirmed, using open-drain output as enable signal. Use Value: Open-drain output allows level-shifting to 1.8V domain; 20µs response prevents race conditions in multi-regulator start-up. |
Use Scenario: LTE modem module in vehicle infotainment system with 12V battery input and wide-voltage DC/DC. IC Role / Device Role / Timing Role: Supervises 3.3V MCU supply during engine cranking events where input dips to 6V–9V. Use Value: –40°C to +85°C rating covers under-hood thermal range; 220ms timeout avoids spurious resets during brief cranking dips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803E29DBVR | 2.9V threshold, 350ms timeout, 0.5µA supply current, SOT23-3 package | Longer timeout may delay µP startup in fast-boot systems; lower current suits ultra-low-power designs | Select when longer reset hold time is needed and SOT23-3 mechanical fit is preferred over SOT323 |
| MAX809SEUR+T | 2.93V threshold, 140ms timeout, 12µA supply current, SOT23-3 package | Higher ICC increases battery load; tighter 2.93V spec suits margin-critical 3.0V rails | Choose when higher accuracy (±1.0%) justifies 12× higher supply current and different timeout profile |
Compared with TLV803E29DBVR and MAX809SEUR+T, the APX803L20-29C3-7 delivers optimal balance of ultra-low ICC, industry-standard 220ms timeout, and SOT323 footprint for compact, battery-sensitive designs-without sacrificing accuracy or thermal robustness.
Availability
APX803L20-29C3-7 is available at Aetrix Electronics and suitable for battery-powered medical sensors, industrial PLC I/O modules, smart home hub power sequencing, and automotive telematics ECUs requiring stable component supply across long product lifecycles.
Supply support for APX803L20-29C3-7 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 US, serving industrial, consumer, computing, and automotive markets.
The APX803L series targets cost-sensitive, space-constrained µP supervision applications where ultra-low power, high accuracy, and small footprint are critical-particularly in portable and battery-operated electronics.
FAQ
What is the exact reset threshold voltage for APX803L20-29C3-7?
The APX803L20-29C3-7 has a nominal reset threshold of 2.90V with ±1.5% accuracy over temperature (–40°C to +85°C), meaning the actual trip point falls between 2.8565V and 2.9435V under specified conditions.
Can APX803L20-29C3-7 drive a 10kΩ pull-up resistor to 3.3V?
Yes-the device's open-drain output can sink ≥3.5mA at VOL ≤ 0.4V, supporting standard 10kΩ pull-ups to 3.3V (I = 0.33mA). This ensures clean logic-low assertion and fast rise times with typical µP input capacitance.
Does the 220ms reset timeout vary with temperature or supply voltage?
Per DS38171 Rev. 3–2 Figure 5, the APX803L20-29C3-7 maintains 220ms ±10% over –40°C to +85°C and is independent of VCC between 0.9V and 5.5V, ensuring predictable timing across environmental and power conditions.
Is APX803L20-29C3-7 qualified for automotive applications?
No-this specific variant is not AEC-Q100 qualified. Diodes offers automotive-grade versions (e.g., APX803L20-29SR-A) with PPAP capability and IATF 16949 manufacturing, but APX803L20-29C3-7 is rated for industrial temperature range only.
APX803L20-29C3-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.9V
- 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-323
APX803L20-29C3-7 FAQ
1.How can I place an order for APX803L20-29C3-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-29C3-7 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 APX803L20-29C3-7 reliable?
The price and inventory of APX803L20-29C3-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-29C3-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-29C3-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-29C3-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-29C3-7?
APX803L20-29C3-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-29C3-7 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 APX803L20-29C3-7?
For technical support, including APX803L20-29C3-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-29C3-7 requirements.
6.How does Aetrix verify that APX803L20-29C3-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-29C3-7 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 APX803L20-29C3-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-29C3-7?
All APX803L20-29C3-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-29C3-7, 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 APX803L20-29C3-7 part is unused and in its original packaging.
Return procedure for APX803L20-29C3-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803L20-29C3-7 Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
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APX803L20-29SA-7
Diodes Incorporated
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