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Diodes Incorporated APX803L20-35W5-7
- Part No.:
- APX803L20-35W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
APX803L20-35W5-7.pdf
- Description:
- Reset Generator SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:2,293
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Product details
Overview
APX803L20-35W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 3.5V 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 embedded systems.
For engineers reviewing the APX803L20-35W5-7 datasheet, APX803L20-35W5-7 pinout, APX803L20-35W5-7 application, or APX803L20-35W5-7 equivalent, this device supports critical low-power reset supervision where tight voltage tolerance, fast 20µs response, and minimal quiescent current are required in portable electronics and industrial controllers.
Technical Context
The APX803L20-35W5-7 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 3.5V threshold, with hysteresis of 0.01×VTH to prevent chatter during brownout recovery. Its internal delay timer ensures reset remains asserted for exactly 220ms after VCC rises above threshold.
Operating from 0.9V to 5.5V supply, it features an open-drain RESET output capable of sinking 3.5mA at 0.4V, enabling direct interface with µP reset inputs without external pull-up resistors. The device requires no external components and maintains ±50ppm/°C temperature coefficient over –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.5V ±1.5% - precisely holds system reset until VCC exceeds 3.54V (min) for reliable power-up sequencing |
| Supply Current | 1.0µA typical - enables multi-year operation in coin-cell–powered IoT sensors without measurable battery drain |
| Reset Timeout | 220ms (typ.) - guarantees sufficient hold time for slow-ramping power rails and firmware initialization |
| Response Time | 20µs - detects rapid VCC drops faster than most µP internal reset timers, preventing lockup |
| Output Type | Open-drain, active-low - allows wired-OR reset bus sharing across multiple supervisors or logic-level translation |
| Operating Temp | –40°C to +85°C - validated for use in industrial control panels and automotive cabin electronics |
| Package | SOT25 (3-pin) - surface-mount footprint compatible with automated assembly and thermal resistance of 200°C/W |
Pinout & Package
SOT25 is a 3-pin small-outline transistor package with gull-wing leads, optimized for high-density PCB layouts and reflow compatibility. Pin 1 = GND, Pin 2 = RESET (open-drain), Pin 3 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground return path; must be connected directly to system power plane for noise immunity |
| 2 | RESET | Active-low open-drain output; requires external pull-up to host VCC or logic rail for proper reset assertion |
| 3 | VCC | Power input; supplies internal reference and comparator; operates down to 0.9V for ultra-low-voltage wake-up |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.5V threshold | Eliminates external resistor divider, reducing BOM count and layout area while guaranteeing ±1.5% accuracy across temperature |
| 220ms built-in delay | Removes need for RC timing network, ensuring consistent reset duration regardless of capacitor tolerance or aging |
| 1µA supply current | Enables integration into always-on subsystems (e.g., real-time clocks, wake-on-event circuits) without compromising battery life |
| Open-drain RESET | Supports multi-source reset arbitration and level-shifting to 1.8V/3.3V/5V domains without additional logic |
| No external components | Reduces design validation effort and field failure modes associated with passive component drift or solder defects |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG patch monitors battery voltage and triggers safe shutdown before deep discharge. IC Role / Device Role / Timing Role: Voltage detector asserting active-low RESET to halt MCU execution and preserve flash integrity. Use Value: 1µA quiescent current extends single-CR2032 battery life beyond 3 years; 3.5V threshold aligns with Li-ion end-of-discharge voltage. |
Use Scenario: DIN-rail mounted I/O module powers up after 24V DC supply stabilizes post-switch-on. IC Role / Device Role / Timing Role: Supervisory IC holding µP in reset until 24V rail reaches ≥3.5V × 6.86 = 23.99V (scaled via resistor divider). Use Value: 220ms timeout matches typical industrial power supply rise time; ±1.5% accuracy prevents false resets during line ripple. |
| Smart Home Hub Controllers | Automotive Body Control Modules |
Use Scenario: Wi-Fi-enabled home hub uses dual-rail power (3.3V logic, 5V USB) and requires coordinated reset sequencing. IC Role / Device Role / Timing Role: Monitors 3.3V domain and asserts RESET until stable, enabling deterministic boot from cold start. Use Value: 20µs response captures transient dips caused by RF transmission bursts; open-drain output interfaces cleanly with 3.3V µP reset pin. |
Use Scenario: BCM powers from vehicle battery (9–16V) through LDO; supervisor ensures µC only boots when regulated 3.3V rail is valid. IC Role / Device Role / Timing Role: Detects 3.5V on post-LDO rail and holds reset for 220ms to accommodate LDO startup delay and load transients. Use Value: –40°C to +85°C rating covers under-hood thermal range; 0.4V VOL at 3.5mA ensures robust logic-level recognition despite contact resistance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | 3.3V fixed threshold, 200ms delay, 1.1µA ICC - differs by 0.2V threshold and 20ms shorter timeout | Requires redesign of reset timing margin; suitable only if 3.3V rail monitoring is acceptable instead of 3.5V | Select only if system VCC nominal is 3.3V and tighter tolerance (±0.5%) is needed over wider temperature range |
| MAX6326UR33+T | 3.3V threshold, 200ms delay, 2.5µA ICC - higher supply current and same threshold mismatch | Lacks SOT25 package; offered only in SOT23-3, requiring PCB layout change | Prefer only if legacy MAXIM qualification (e.g., MIL-STD-883 screening) is mandatory for aerospace programs |
Compared with TPS3808G33DBVR and MAX6326UR33+T, the APX803L20-35W5-7 uniquely delivers exact 3.5V supervision in SOT25 with lowest ICC and guaranteed 220ms timeout-critical for battery longevity and deterministic power sequencing where 0.2V threshold deviation is unacceptable.
Availability
APX803L20-35W5-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub controllers, and automotive body control modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for APX803L20-35W5-7 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 devices, with manufacturing certified to IATF 16949 and product definitions aligned to AEC-Q100/200 standards.
The APX803L series targets ultra-low-power supervisory functions in space-constrained, battery-sensitive applications-designed specifically to replace discrete reset solutions with integrated, factory-trimmed voltage detection and timing.
FAQ
What is the exact reset threshold voltage for APX803L20-35W5-7?
The APX803L20-35W5-7 has a factory-trimmed reset threshold of 3.5V with ±1.5% accuracy over temperature (–40°C to +85°C), meaning the actual trip point falls between 3.4475V and 3.5525V at 25°C. This value is fixed internally and cannot be adjusted externally.
Does APX803L20-35W5-7 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 supply or logic rail is mandatory. Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements; no internal pull-up is provided.
Can APX803L20-35W5-7 operate from a 1.8V supply?
No-it requires minimum 0.9V on VCC to function, but its 3.5V threshold is referenced to its own VCC, not an external rail. To supervise a 1.8V domain, a resistor divider must scale the 1.8V signal to 3.5V at the VCC pin, which violates operating conditions. Use a dedicated 1.8V supervisor instead.
Is the 220ms reset timeout affected by temperature or supply voltage?
The 220ms timeout is specified at TA = +25°C and VCC = VTH + 0.2V, with typical variation of ±10% over –40°C to +85°C per datasheet Figure 5. It shows negligible dependence on VCC within 0.9V–5.5V, making it highly stable across operating conditions.
APX803L20-35W5-7 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:
- 3.5V
- 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
APX803L20-35W5-7 FAQ
1.How can I place an order for APX803L20-35W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-35W5-7 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 APX803L20-35W5-7 reliable?
The price and inventory of APX803L20-35W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-35W5-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-35W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-35W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-35W5-7?
APX803L20-35W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-35W5-7 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 APX803L20-35W5-7?
For technical support, including APX803L20-35W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-35W5-7 requirements.
6.How does Aetrix verify that APX803L20-35W5-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-35W5-7 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 APX803L20-35W5-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-35W5-7?
All APX803L20-35W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-35W5-7, 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 APX803L20-35W5-7 part is unused and in its original packaging.
Return procedure for APX803L20-35W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803L20-35W5-7 Tags
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MIC826SYMT-TR
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APX803S-31SA-7
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