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Diodes Incorporated APX809S00-31SR-7
- Part No.:
- APX809S00-31SR-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX809S00-31SR-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
APX809S00-31SR-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory functions in digital systems. It monitors +3.08V supply voltage with ±0.04V tolerance, asserts active-low reset for ≥240ms after VCC recovery, and operates down to 1V supply while consuming only 7µA typical current. Used in portable battery-powered equipment requiring reliable power-on reset.
For engineers reviewing the APX809S00-31SR-7 datasheet, APX809S00-31SR-7 pinout, APX809S00-31SR-7 application, or APX809S00-31SR-7 equivalent, key selection criteria include reset threshold accuracy (3.04–3.12V), push-pull output drive capability (1.2mA sink), guaranteed operation at VCC = 1V, and SOT23-SR package compatibility with space-constrained PCB layouts.
Technical Context
The APX809S00-31SR-7 integrates a precision bandgap reference and comparator to detect VCC drops below 3.08V nominal threshold. Its internal timing circuit ensures minimum 240ms reset assertion after VCC rises above threshold, independent of external components.
Designed for immunity to fast transients, it guarantees correct logic state on RESET output across -40°C to +125°C ambient and maintains valid reset signaling even as VCC decays to 1.0V - enabling robust brown-out detection in low-voltage embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.04–3.12V (ensures reliable detection of 3.3V rail collapse before µP instability) |
| Supply Current | 7µA typ. (enables multi-year battery life in always-on monitoring applications) |
| Reset Pulse Width | 140–280ms (guarantees sufficient time for µP initialization and peripheral stabilization) |
| Operating Voltage Range | 1.0–5.5V (supports operation during deep brown-out and full supply range) |
| Output Type | Push-pull active-low RESET (eliminates need for external pull-up resistor) |
| Temp Coefficient | 30ppm/°C (maintains threshold stability across industrial temperature range) |
| Reset Propagation Delay | 20µs max (responds rapidly to supply dips without false triggering) |
Pinout & Package
APX809S00-31SR-7 is housed in a RoHS-compliant, halogen-free SOT23-3 (SR) package with 1.3mm × 2.9mm footprint and 0.95mm height, optimized for high-density PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 | RESET | Active-low push-pull reset output; sinks up to 1.2mA at 0.3V to drive µP /RESET input directly |
| 3 | VCC | Power supply input; powers internal circuitry and defines reset threshold reference point |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.08V threshold | ±0.04V tolerance ensures accurate detection of 3.3V rail failure without overdesign margin |
| 1V valid reset operation | Guaranteed RESET assertion integrity down to 1.0V VCC supports ultra-low-voltage brown-out recovery |
| No external components | Self-contained supervision eliminates BOM cost and layout area for RC networks or comparators |
| 240ms min reset timeout | Internally timed pulse meets µP power-on reset requirements per JEDEC JESD84-B51 |
| SOT23-SR green package | Lead-free, halogen-free construction compliant with RoHS 3 and automotive ELV directives |
Applications
| Battery-Powered IoT Sensor Node | Industrial PLC I/O Module |
|---|---|
Use Scenario: Remote environmental sensor node powered by coin-cell battery with intermittent BLE transmission. IC Role / Device Role / Timing Role: Monitors 3.3V LDO output to assert /RESET during battery sag, preventing firmware corruption during low-VCC operation. Use Value: 7µA quiescent current extends battery life beyond 5 years; 1V reset validity ensures clean restart even at end-of-life battery voltage. | Use Scenario: Digital input module in factory automation system exposed to wide ambient temperature swings (-40°C to +85°C). IC Role / Device Role / Timing Role: Supervises FPGA configuration supply to guarantee deterministic boot sequence after power cycling or transient dropout. Use Value: 30ppm/°C threshold drift maintains ±0.5% accuracy across full operating range; 240ms reset pulse satisfies FPGA configuration timing requirements. |
| Medical Handheld Diagnostic Device | Automotive Body Control Module (BCM) |
Use Scenario: Portable ultrasound probe with lithium-polymer battery and ARM Cortex-M7 host processor. IC Role / Device Role / Timing Role: Provides power-on reset and brown-out detection for main SoC, interfacing directly to /RESET pin without level-shifting. Use Value: Push-pull active-low output drives SoC /RESET with no external pull-up; guaranteed 0.3V VOL at 1.2mA ensures noise-immune logic transition. | Use Scenario: Low-voltage subsystem in BCM managing door locks, lighting, and window controls. IC Role / Device Role / Timing Role: Supervises 3.3V CAN transceiver and microcontroller supply under load dump and cold-crank conditions. Use Value: Valid operation down to 1.0V VCC enables reset assertion during severe cold-crank events where 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 |
|---|---|---|---|
| TPS3808G33DBVR | 3.3V threshold, 350ms reset timeout, 1.6µA IQ, open-drain output | Requires external pull-up; longer timeout may delay system startup | Select when ultra-low IQ is critical and board space allows pull-up resistor |
| MAX809SEUR+T | 3.08V threshold, 240ms timeout, 15µA IQ, open-drain output | Higher supply current; open-drain requires pull-up and adds noise susceptibility | Select when legacy MAXIM footprint compatibility is required and higher IQ is acceptable |
Compared with TPS3808G33DBVR and MAX809SEUR+T, APX809S00-31SR-7 delivers identical threshold accuracy and timeout while offering push-pull output (no pull-up needed) and lowest IQ among the three - optimizing both PCB area and battery runtime in compact portable designs.
Availability
APX809S00-31SR-7 is available at Aetrix Electronics and suitable for battery-powered IoT sensors, industrial PLC modules, and medical handheld devices requiring stable component supply and long-term lifecycle support.
Supply support for APX809S00-31SR-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, serving industrial, computing, communications, and consumer markets with high-reliability, cost-optimized components.
The APX809S/810S series belongs to Diodes' power management supervisor product line, engineered specifically for dependable µP reset generation in space- and power-constrained embedded systems.
FAQ
What is the exact reset threshold voltage for APX809S00-31SR-7?
The APX809S00-31SR-7 has a nominal reset threshold of 3.08V, with guaranteed minimum of 3.04V and maximum of 3.12V across temperature and process variation. This value is laser-trimmed during manufacturing and specified in the Electrical Characteristics table of DS39140 Rev. 2–2.
Does APX809S00-31SR-7 require an external capacitor for reset timing?
No. The 240ms minimum reset timeout is generated by an internal oscillator and timing circuit - no external capacitor or resistor is needed. This eliminates component count, reduces PCB area, and improves reliability compared to RC-based supervisors.
Can APX809S00-31SR-7 drive a microcontroller's /RESET pin directly?
Yes. Its push-pull active-low RESET output can sink up to 1.2mA at 0.3V, meeting standard µP /RESET input requirements without external pull-up. It interfaces directly with ARM Cortex-M, PIC, and STM32 families without level-shifting or buffering.
Is APX809S00-31SR-7 qualified for automotive applications?
No. While it operates across -40°C to +125°C and is AEC-Q200 compatible in thermal performance, APX809S00-31SR-7 is not AEC-Q100 qualified and lacks automotive-specific qualification testing (e.g., HTOL, ESD, EMC). It is rated for industrial and commercial use only.
APX809S00-31SR-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:
- 3.08V
- 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
APX809S00-31SR-7 FAQ
1.How can I place an order for APX809S00-31SR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX809S00-31SR-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 APX809S00-31SR-7 reliable?
The price and inventory of APX809S00-31SR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX809S00-31SR-7 is usually 5 days.
3.What payment methods are accepted for APX809S00-31SR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX809S00-31SR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX809S00-31SR-7?
APX809S00-31SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX809S00-31SR-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 APX809S00-31SR-7?
For technical support, including APX809S00-31SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX809S00-31SR-7 requirements.
6.How does Aetrix verify that APX809S00-31SR-7 is sourced from the original manufacturer or authorized distributors?
All APX809S00-31SR-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 APX809S00-31SR-7 meets industry standards.
7.What is the process for return or replacement of APX809S00-31SR-7?
All APX809S00-31SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX809S00-31SR-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 APX809S00-31SR-7 part is unused and in its original packaging.
Return procedure for APX809S00-31SR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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