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Diodes Incorporated APX809S00-40SA-7
- Part No.:
- APX809S00-40SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX809S00-40SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,558
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Product details
Overview
APX809S00-40SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory functions in embedded digital systems. It monitors +4.0V supply rails, asserts an active-low reset signal when VCC drops below 4.00V (±0.06V), maintains reset for ≥240ms after recovery, and operates down to VCC = 1.0V with 7µA typical supply current. Used in battery-powered controllers and portable instrumentation.
For engineers reviewing the APX809S00-40SA-7 datasheet, APX809S00-40SA-7 pinout, APX809S00-40SA-7 application, or APX809S00-40SA-7 equivalent, key selection criteria include reset threshold accuracy (±0.06V), guaranteed operation at 1V VCC, push-pull output drive capability (1.2mA sink), temperature-stable 30ppm/°C threshold drift, and SOT23-3 package compatibility with space-constrained PCB layouts.
Technical Context
The APX809S00-40SA-7 integrates a precision bandgap reference, comparator, and power-on reset timer in a single die. Its reset assertion logic is triggered only when VCC falls below the 4.00V threshold and remains asserted for a minimum 240ms timeout after VCC exceeds 1.02×VTH - ensuring reliable µP initialization during brownout recovery.
No external components are required: internal hysteresis eliminates need for external RC networks, and the push-pull output drives reset lines directly without pull-up resistors. The comparator ignores transients <20µs, and output logic state is guaranteed valid across full -40°C to +125°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.00V ±0.06V - ensures precise detection of +4.0V rail collapse before µP malfunction |
| Reset Timeout | 140–280ms - guarantees minimum reset pulse width for full µP initialization sequence |
| Supply Current | 7µA typ. - enables multi-year battery life in portable equipment |
| VCC Operating Range | 1.0V to 5.5V - supports reset assertion even during deep brownout or low-battery conditions |
| Output Type | Active-low push-pull - eliminates external pull-up resistor and reduces BOM count |
| Temp Coefficient | 30ppm/°C - limits threshold drift to ±12mV over -40°C to +125°C |
| Reset Propagation Delay | 20µs max - rejects fast supply transients without false triggering |
Pinout & Package
APX809S00-40SA-7 is housed in a RoHS-compliant, halogen-free SOT23-3 package (JEDEC TO-236AB), measuring 2.90mm × 1.30mm × 1.00mm with 0.95mm lead pitch. Thermal resistance θJA = 232°C/W enables operation up to +125°C ambient without heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Return path for internal comparator and output stage; must be connected to system ground plane |
| 2 (RESET) | Active-Low Push-Pull Output | Drives µP RESET# pin directly; sinks 1.2mA at 0.3V max, no external pull-up required |
| 3 (VCC) | Supply Input | Monitored voltage rail input; powers internal circuitry and enables reset assertion below 4.00V |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.00V threshold | ±0.06V tolerance ensures compatibility with +4.0V logic families and avoids marginal reset timing |
| 1V minimum VCC operation | Guarantees valid reset state during deep brownout - critical for data retention in flash-based µCs |
| 240ms min. reset timeout | Meets JEDEC JESD8-12B requirement for µP power-on initialization stability |
| 7µA supply current | Reduces standby power by >90% vs. discrete reset solutions using comparators and timers |
| SOT23-3 footprint | Enables placement on dense MCU carrier boards where space is constrained to <3mm² |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
|
Use Scenario: Power monitoring in DIN-rail mounted programmable logic controllers with dual 24V/5V supplies. IC Role / Device Role / Timing Role: Supervises the +4.0V auxiliary rail powering FPGA configuration memory and I/O buffers. Use Value: Prevents firmware corruption during AC line sags by holding reset until stable 4.0V is restored for ≥240ms. |
Use Scenario: Battery-powered ECG and SpO₂ monitors requiring ultra-low-power supervision. IC Role / Device Role / Timing Role: Detects Li-ion battery discharge below 4.0V and initiates graceful shutdown sequence. Use Value: 7µA quiescent current extends single-charge runtime by >15% versus alternative reset ICs. |
| Smart Energy Meters | Automotive Body Control Modules |
|
Use Scenario: Metering units with isolated DC-DC converters feeding +4.0V MCU subsystems. IC Role / Device Role / Timing Role: Monitors secondary-side 4.0V rail to ensure secure boot integrity after power-up. Use Value: Push-pull output eliminates pull-up resistor, reducing leakage paths in high-impedance metering circuits. |
Use Scenario: Low-voltage subsystems in 12V automotive body electronics (e.g., door modules). IC Role / Device Role / Timing Role: Supervises regulated +4.0V supply derived from buck converter for CAN transceiver and sensor interface. Use Value: Valid operation down to 1.0V VCC prevents spurious resets during cold-crank battery dips to 6V system level. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 4.00V threshold, 140ms reset timeout, open-drain output requiring external pull-up | Lacks push-pull drive; adds BOM cost and board area for pull-up resistor | Choose if legacy design already uses open-drain topology and pull-up exists |
| TPS3808G33DBVR | 3.3V fixed threshold, adjustable timeout (200ms–10s), higher 12µA supply current | Not pin-compatible; requires redesign for 4.0V detection and lower IQ | Choose only if adjustable timeout or tighter 0.5% threshold tolerance is required |
Compared with MAX809SEUR+T and TPS3808G33DBVR, APX809S00-40SA-7 delivers superior integration (no pull-up needed), lowest quiescent current (7µA vs. 12–20µA), and exact 4.00V threshold matching industrial +4V rail standards - making it optimal for new designs prioritizing size, power, and precision.
Availability
APX809S00-40SA-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, smart energy meters, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for APX809S00-40SA-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and automotive markets.
APX809S00-40SA-7 belongs to Diodes' APX809S/810S micro-power voltage detector family, engineered specifically for cost-sensitive, space-constrained µP supervisory applications demanding precision thresholds and ultra-low IQ.
FAQ
What is the guaranteed minimum reset timeout duration for APX809S00-40SA-7?
The APX809S00-40SA-7 guarantees a minimum reset active timeout period of 140ms and a typical value of 240ms after VCC rises above 1.02×VTH. This meets JEDEC JESD8-12B requirements for reliable microprocessor initialization and ensures sufficient time for clock stabilization and register clearing before release.
Can APX809S00-40SA-7 operate with a 3.3V supply rail?
No - APX809S00-40SA-7 is factory-trimmed for 4.00V threshold detection and is not specified for reliable operation on 3.3V rails. For +3.3V supervision, use APX809S00-31SA-7 (3.08V threshold) or APX809S00-33SA-7 (3.30V threshold), both in identical SOT23-3 packaging.
Does APX809S00-40SA-7 require an external capacitor for reset timing?
No - the reset timeout is generated by an internal RC oscillator and does not require any external timing capacitor. This eliminates component variation, board space, and solder joint reliability concerns associated with discrete timing elements.
Is APX809S00-40SA-7 compatible with lead-free reflow profiles?
Yes - APX809S00-40SA-7 is fully RoHS 3 compliant (2015/863/EU), lead-free, halogen-free, and antimony-free. It supports standard Pb-free reflow profiles with peak temperatures up to 260°C and is qualified per J-STD-020 moisture sensitivity level 1 (MSL1).
APX809S00-40SA-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:
- 4V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX809S00-40SA-7 FAQ
1.How can I place an order for APX809S00-40SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX809S00-40SA-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 APX809S00-40SA-7 reliable?
The price and inventory of APX809S00-40SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX809S00-40SA-7 is usually 5 days.
3.What payment methods are accepted for APX809S00-40SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX809S00-40SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX809S00-40SA-7?
APX809S00-40SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX809S00-40SA-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 APX809S00-40SA-7?
For technical support, including APX809S00-40SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX809S00-40SA-7 requirements.
6.How does Aetrix verify that APX809S00-40SA-7 is sourced from the original manufacturer or authorized distributors?
All APX809S00-40SA-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 APX809S00-40SA-7 meets industry standards.
7.What is the process for return or replacement of APX809S00-40SA-7?
All APX809S00-40SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX809S00-40SA-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 APX809S00-40SA-7 part is unused and in its original packaging.
Return procedure for APX809S00-40SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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