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Diodes Incorporated APX809S05-46SR-7
- Part No.:
- APX809S05-46SR-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX809S05-46SR-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,477
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Product details
Overview
APX809S05-46SR-7 from Diodes Incorporated is a microprocessor supervisory IC in SOT23-3 package that monitors +4.63V power supplies and asserts an active-low reset signal for ≥240ms after VCC recovers above threshold. It features 7µA typical supply current, guaranteed reset validity down to VCC = 1V, and push-pull output compatible with µP reset inputs in portable and industrial embedded systems.
For engineers reviewing the APX809S05-46SR-7 datasheet, APX809S05-46SR-7 pinout, APX809S05-46SR-7 application, or APX809S05-46SR-7 equivalent, key selection criteria include reset threshold accuracy (±0.03V), temperature coefficient (30ppm/°C), power-on reset timeout (240ms typ.), and operation down to 1V supply - critical for battery-backed and low-voltage microcontroller systems.
Technical Context
The device implements a precision bandgap-based voltage comparator with hysteresis to reject fast VCC transients. Its internal reference is trimmed to deliver ±1.5% threshold accuracy over -40°C to +125°C, enabling reliable reset assertion across automotive and industrial ambient conditions.
Reset timing is generated by an on-chip RC oscillator independent of external components, ensuring consistent 240ms minimum reset pulse width regardless of supply ramp rate or load capacitance - eliminating need for external timing capacitors in µP supervision circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (typ.), ±0.03V tolerance - ensures precise detection of +5V rail collapse before µP instability |
| Supply Current | 7µA (typ.) - enables multi-year battery life in coin-cell-powered IoT sensors and wearables | Reset Timeout | 240ms (min.) - satisfies ARM Cortex-M and PIC MCU power-on reset timing requirements |
| VCC Operating Range | 1.0V to 5.5V - guarantees valid reset state during brown-out and deep-sleep wake-up sequences |
| Output Type | Push-pull active-low RESET - drives µP reset pin directly without pull-up resistor |
| Temp Coefficient | 30ppm/°C - maintains <±2% threshold drift over full -40°C to +125°C range |
Pinout & Package
SOT23-3 (SR variant) surface-mount package with 2.4mm × 1.3mm footprint, 0.95mm height, and gull-wing leads for reflow compatibility. RoHS-compliant, halogen-free "Green" molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be connected to system ground plane |
| 2 | RESET | Active-low push-pull reset output; sinks 1.2mA at 0.3V max to assert µP reset |
| 3 | VCC | Power supply input; powers internal circuitry and defines monitored rail voltage |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrates precision reference, comparator, timer, and push-pull driver - reduces BOM count and PCB area vs. discrete reset solutions |
| Guaranteed reset validity to 1V | Ensures deterministic reset behavior during deep brown-out events where VCC drops below 2V |
| Transient-immune comparator | Rejects <20µs VCC glitches - prevents false resets from switching noise or ESD-induced supply dips |
| 240ms min. reset timeout | Meets JEDEC JESD8-12E and ARM PMU specifications for safe microcontroller initialization timing |
Applications
| Industrial PLC Controllers | Portable Medical Sensors |
|---|---|
Use Scenario: Monitoring 5V logic rails in programmable logic controllers exposed to 8kV ESD and wide ambient temperature swings. IC Role / Device Role / Timing Role: Voltage detector providing fail-safe reset to ARM Cortex-M7 CPU during power interruption or undervoltage. Use Value: 30ppm/°C threshold stability ensures reset triggers within ±0.05V over -40°C to +85°C operating range, preventing spurious reboots. | Use Scenario: Power supervision in Bluetooth LE-enabled glucose meters powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Supervisory IC asserting reset until regulated 3.3V rail stabilizes post-battery insertion. Use Value: 7µA supply current extends battery life beyond 3 years while maintaining 240ms reset hold time for reliable BLE SoC boot sequence. |
| Automotive Body Control Modules | Smart Home Hub Power Management |
Use Scenario: Reset generation for CAN microcontrollers in door module ECUs subjected to load dump transients. IC Role / Device Role / Timing Role: Monitors switched 5V supply and holds reset active during ISO 7637-2 Pulse 5a (load dump) recovery. Use Value: Push-pull output drives 10nF bus capacitance without external pull-up, reducing component count in space-constrained modules. | Use Scenario: Ensuring clean startup of dual-core application processors in Wi-Fi mesh hubs with multi-rail PMICs. IC Role / Device Role / Timing Role: Independent 4.63V supervisor verifying main 5V rail integrity before releasing processor reset. Use Value: 240ms minimum timeout exceeds typical PMIC power-good delay, eliminating race conditions during system power-up sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2T | 4.63V threshold, 140ms min. reset timeout, open-drain output requiring external pull-up | Lacks push-pull drive; adds 1 resistor and increases board area | Select when legacy open-drain interface is required or cost-per-unit is prioritized over design simplicity |
| TPS3808G33DBVR | 3.3V threshold, adjustable timeout via capacitor, 1.5µA quiescent current | Not pin-compatible; requires redesign for 4.63V monitoring and fixed 240ms timing | Choose only if system requires ultra-low current and programmable reset duration - not a drop-in replacement |
Compared with MAX809TRD2T and TPS3808G33DBVR, APX809S05-46SR-7 delivers guaranteed 240ms reset hold time with integrated push-pull output - eliminating external components and simplifying layout for fixed 4.63V supervision in high-volume embedded designs.
Availability
APX809S05-46SR-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical sensors, automotive body control modules, and smart home hub power management requiring stable component supply and long-term lifecycle support.
Supply support for APX809S05-46SR-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 devices for industrial, automotive, and consumer markets.
The APX809S/810S series belongs to Diodes' microprocessor supervisory product line, engineered specifically for cost-sensitive, space-constrained applications requiring precise, low-power voltage monitoring and deterministic reset timing.
FAQ
What is the exact reset threshold voltage and tolerance for APX809S05-46SR-7?
The APX809S05-46SR-7 has a nominal reset threshold of 4.63V with ±0.03V (±0.65%) tolerance at +25°C, and maintains ±1.5% total accuracy over -40°C to +125°C per DS39140 Rev. 2–2 Table 1. This is verified by factory trim and tested during production screening.
Does APX809S05-46SR-7 require an external pull-up resistor on the RESET pin?
No. The device features a push-pull output stage capable of actively driving LOW (≤0.3V at 1.2mA sink) and HIGH (≥0.8×VCC at 500µA source), eliminating need for external pull-up resistors - confirmed in Pin Descriptions and Electrical Characteristics sections of DS39140.
Can APX809S05-46SR-7 operate reliably below 2.0V VCC?
Yes. The datasheet guarantees valid reset assertion and correct logic state down to VCC = 1.0V (Section "Recommended Operating Conditions"), enabling use in brown-out detection scenarios where supply collapses below 2V but remains above 1V.
What is the thermal resistance and maximum junction temperature for SOT23-3 package?
The SOT23-3 (SR) package has θJA = 232°C/W and θJC = 87°C/W (Absolute Maximum Ratings table), with maximum junction temperature rated at +150°C - validated under standard JEDEC test conditions per DS39140 Rev. 2–2 page 3.
APX809S05-46SR-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:
- 4.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX809S05-46SR-7 FAQ
1.How can I place an order for APX809S05-46SR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX809S05-46SR-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 APX809S05-46SR-7 reliable?
The price and inventory of APX809S05-46SR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX809S05-46SR-7 is usually 5 days.
3.What payment methods are accepted for APX809S05-46SR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX809S05-46SR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX809S05-46SR-7?
APX809S05-46SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX809S05-46SR-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 APX809S05-46SR-7?
For technical support, including APX809S05-46SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX809S05-46SR-7 requirements.
6.How does Aetrix verify that APX809S05-46SR-7 is sourced from the original manufacturer or authorized distributors?
All APX809S05-46SR-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 APX809S05-46SR-7 meets industry standards.
7.What is the process for return or replacement of APX809S05-46SR-7?
All APX809S05-46SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX809S05-46SR-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 APX809S05-46SR-7 part is unused and in its original packaging.
Return procedure for APX809S05-46SR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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