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Diodes Incorporated APX803L40-20SA-7
- Part No.:
- APX803L40-20SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L40-20SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,273
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Product details
Overview
APX803L40-20SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 4.0V threshold detection with ±1.5% accuracy, 1µA typical supply current, 450ms reset timeout, and open-drain active-low RESET output in SOT23 package. It monitors VCC in battery-powered embedded systems to ensure reliable microprocessor reset during brownout conditions.
For engineers reviewing the APX803L40-20SA-7 datasheet, APX803L40-20SA-7 pinout, APX803L40-20SA-7 application, or APX803L40-20SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, low quiescent current impact on system battery life, and compatibility with 3-pin SOT23 footprint constraints in space-constrained designs.
Technical Context
The APX803L40-20SA-7 implements a fixed-threshold voltage detection architecture with internal hysteresis (0.01×VTH) to prevent oscillation near the 4.0V trip point. Its comparator-based sensing circuit triggers within 20µs of VCC falling below threshold and holds RESET low until VCC exceeds 4.0V + hysteresis.
It features factory-programmed 450ms reset timeout (tDELAY), operates from 0.9V to 5.5V supply, and maintains threshold accuracy across –40°C to +85°C ambient range with 50ppm/°C temperature coefficient. The open-drain output supports wired-OR configuration with external pull-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.0V ±1.5% - ensures deterministic brownout detection at nominal 4.0V rail without external resistor network |
| Supply Current | 1.0µA (typ.) - enables multi-year operation in coin-cell–powered IoT sensors without measurable battery drain |
| Reset Timeout | 450ms (typ.) - provides sufficient hold time for full µP initialization and peripheral stabilization after power recovery |
| Response Time | 20µs - guarantees rapid fault capture before digital logic corruption occurs during fast VCC collapse |
| Output Type | Open-drain, active-low - allows flexible pull-up voltage selection (up to 5.5V) and multi-device reset bus sharing |
| Operating Temp | –40°C to +85°C - supports industrial-grade deployment in uncontrolled ambient environments |
| Hysteresis | 0.01×VTH (40mV) - prevents chatter during slow-rising VCC by enforcing clean release above 4.04V |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 1.3mm × 2.9mm × 1.0mm body, gull-wing leads, RoHS-compliant matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground return path; must be connected directly to PCB ground plane for stable threshold reference |
| 2 | RESET | Open-drain output; sinks up to 20mA; requires external pull-up to define logic-high level and drive strength |
| 3 | VCC | Power input; supplies internal bandgap reference and comparator; decoupling capacitor (100nF) required at pin |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1.0µA typical supply current minimizes standby power in always-on monitoring applications |
| Factory-set VTH | 4.0V threshold trimmed at wafer test-eliminates external resistor calibration and layout sensitivity |
| Temperature-stable tDELAY | 450ms timeout varies <±10% from –40°C to +85°C-ensures consistent reset duration across thermal extremes |
| No external components | Self-contained detection circuit requires only VCC decoupling capacitor-reduces BOM count and board area |
| Robust ESD rating | ±4000V HBM-survives handling and assembly without additional protection circuitry |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell with 3.0V nominal rail. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET when battery drops below 4.0V to halt measurement and prevent corrupted data transmission. Use Value: 1µA quiescent current extends usable battery life beyond 3 years; 450ms timeout ensures BLE radio completes shutdown sequence before power loss. |
Use Scenario: DIN-rail mounted remote I/O unit operating in factory environment with 24VDC-to-3.3V conversion. IC Role / Device Role / Timing Role: Monitors 3.3V logic rail to initiate controlled firmware restart upon undervoltage event caused by transient line disturbance. Use Value: ±1.5% threshold accuracy prevents nuisance resets during normal 3.3V ±5% regulation; -40°C to +85°C rating matches industrial ambient spec. |
| Smart Home Hub Controllers | Automotive Body Control Modules |
Use Scenario: Wi-Fi–enabled home automation hub using single-cell Li-ion (4.2V–3.0V range) with 3.3V LDO. IC Role / Device Role / Timing Role: Detects 4.0V drop on main battery to trigger graceful OS suspend and non-volatile state save before shutdown. Use Value: Fast 20µs response captures rapid discharge events; open-drain output interfaces directly to SoC's dedicated reset input without level-shifting. |
Use Scenario: Door module with LIN transceiver and MCU powered from vehicle battery (9V–16V) via 5V buck converter. IC Role / Device Role / Timing Role: Supervises 5V rail to assert hardware reset if input dips below 4.0V during cold-crank or load dump recovery. Use Value: 450ms timeout aligns with automotive power sequencing requirements; SOT23 footprint fits tight space behind door panel. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803E40DBVR | 4.0V threshold, 350ms timeout, 0.5µA ICC, SOT23-3 | Shorter timeout; lower ICC but tighter 1.0% VTH accuracy | Select when longer battery life outweighs need for extended reset hold time |
| MAX809SEUR+T | 4.0V threshold, 240ms timeout, 10µA ICC, SOT23-3 | Higher supply current; wider VTH tolerance (±2.5%) | Select when cost sensitivity dominates and 240ms timeout meets system boot timing |
Compared with TLV803E40DBVR and MAX809SEUR+T, the APX803L40-20SA-7 delivers optimal balance of ultra-low ICC (1µA), industry-standard 450ms timeout, and robust ±1.5% threshold accuracy-making it preferred for long-life portable and industrial edge devices where both power efficiency and reliable reset timing are critical.
Availability
APX803L40-20SA-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 guaranteed long-term availability.
Supply support for APX803L40-20SA-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 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-operated and industrial embedded systems.
FAQ
What is the exact reset threshold voltage for APX803L40-20SA-7?
The APX803L40-20SA-7 has a factory-trimmed reset threshold of 4.0V with ±1.5% accuracy over temperature (–40°C to +85°C). This means the actual trip point falls between 3.94V and 4.06V at +25°C, and remains within ±1.5% across the full operating range per datasheet DS38171 Rev. 3-2.
Can APX803L40-20SA-7 drive a 10kΩ pull-up resistor to 5V?
Yes. With VOL ≤0.4V at ISINK = 3.5mA (per datasheet), the APX803L40-20SA-7 can reliably sink >0.5mA into a 10kΩ pull-up to 5V (I = 5V/10kΩ = 0.5mA), ensuring solid logic-low assertion and noise margin well within specification.
Does this device require an external capacitor on the RESET pin?
No. The APX803L40-20SA-7 does not require an external capacitor on the RESET pin. Its 450ms timeout is internally generated; only a 100nF ceramic decoupling capacitor on VCC (as shown in the Typical Applications Circuit) is mandatory for stable operation.
Is APX803L40-20SA-7 qualified for automotive applications?
No. APX803L40-20SA-7 is not AEC-Q100 qualified. Diodes Incorporated explicitly states that automotive-grade variants require specific change control, PPAP capability, and IATF 16949 manufacturing-none of which apply to this standard industrial-grade SOT23 part.
APX803L40-20SA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 292ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX803L40-20SA-7 FAQ
1.How can I place an order for APX803L40-20SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L40-20SA-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 APX803L40-20SA-7 reliable?
The price and inventory of APX803L40-20SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L40-20SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L40-20SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L40-20SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L40-20SA-7?
APX803L40-20SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L40-20SA-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 APX803L40-20SA-7?
For technical support, including APX803L40-20SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L40-20SA-7 requirements.
6.How does Aetrix verify that APX803L40-20SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L40-20SA-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 APX803L40-20SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L40-20SA-7?
All APX803L40-20SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L40-20SA-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 APX803L40-20SA-7 part is unused and in its original packaging.
Return procedure for APX803L40-20SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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