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Diodes Incorporated APX809S00-46SR-7
- Part No.:
- APX809S00-46SR-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX809S00-46SR-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,885
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Product details
Overview
APX809S00-46SR-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory functions in embedded digital systems. It provides active-low reset assertion when VCC drops below 4.63 V (typ.), maintains reset for ≥240 ms after VCC recovery, and operates with supply current as low as 7 µA (typ.) - enabling reliable power monitoring in battery-powered controllers and portable instrumentation.
For engineers reviewing the APX809S00-46SR-7 datasheet, APX809S00-46SR-7 pinout, APX809S00-46SR-7 application, or APX809S00-46SR-7 equivalent, key selection criteria include reset threshold accuracy (±0.06 V), guaranteed valid reset output down to VCC = 1 V, push-pull output drive capability (1.2 mA sink), and SOT23-SR package compatibility with space-constrained PCB layouts.
Technical Context
The APX809S00-46SR-7 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 4.63 V threshold. Its internal timing circuit ensures minimum reset pulse width of 240 ms after VCC exceeds threshold, independent of external components.
Designed for robust operation across -40°C to +125°C, it features temperature-stable threshold (30 ppm/°C drift), immunity to fast VCC transients, and logic-state guarantee down to 1 V supply - making it suitable for brown-out detection in industrial microcontroller systems where supply stability cannot be assumed.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63 V (typ.), ±0.06 V tolerance - ensures precise detection of 5 V rail collapse before µP malfunction. |
| Reset Pulse Width | 240 ms (min) - guarantees sufficient time for full µP initialization after power recovery. |
| Supply Current | 7 µA (typ.) - enables multi-year battery life in always-on monitoring applications. |
| Valid Reset Down To | VCC = 1 V - maintains deterministic reset state during deep brown-out or battery discharge. |
| Output Type | Push-pull active-low RESET - eliminates need for external pull-up resistor and supports direct µP /RESET input. |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive modules and industrial control enclosures. |
| Package | SOT23-SR - 3-pin surface-mount footprint (2.9 × 1.3 × 1.0 mm) compatible with standard reflow profiles. |
Pinout & Package
SOT23-SR is a 3-pin, single-row, plastic surface-mount package with gull-wing leads. Pin 1 (GND), Pin 2 (RESET), Pin 3 (VCC) - top-view pinout matches JEDEC TO-236AB standard with 0.95 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | GND | Ground reference for internal comparator and output stage; must be connected to system ground plane for noise immunity. |
| Pin 2 | RESET | Active-low push-pull reset output; drives low (≤0.3 V @ 1.2 mA) during fault, high (≥0.8×VCC) otherwise. |
| Pin 3 | VCC | Power supply input; monitors this rail directly; functional from 1.0 V to 5.5 V. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63 V threshold | ±0.06 V tolerance at 25°C ensures accurate detection of 5 V rail undervoltage without calibration. |
| 240 ms minimum reset timeout | Internally timed - eliminates external RC network and associated component aging or tolerance drift. |
| 7 µA typical supply current | Enables continuous supervision in energy-harvesting or coin-cell-powered devices without measurable battery drain. |
| Reset validity to 1 V VCC | Guarantees correct logic state even during severe brown-out, preventing spurious release of reset. |
| SOT23-SR green package | Halogen- and antimony-free, fully RoHS-compliant (2015/863/EU), with <900 ppm Br/Cl and <1000 ppm Sb. |
Applications
| Industrial PLC Controller | Portable Medical Monitor |
|---|---|
|
Use Scenario: Power sequencing and brown-out protection in DIN-rail mounted programmable logic controllers operating from 24 V DC converted to 5 V. IC Role / Device Role / Timing Role: Voltage supervisor asserting /RESET to ARM Cortex-M7 MCU during input rail sag or switching regulator dropout. Use Value: Prevents firmware corruption by enforcing 240 ms minimum reset hold time after 5 V rail recovers above 4.63 V. |
Use Scenario: Battery-backed vital signs monitor requiring fail-safe restart on Li-ion voltage decay below 4.6 V. IC Role / Device Role / Timing Role: Primary reset generator tied to regulated 5 V domain; asserts active-low reset when battery-derived 5 V falls. Use Value: 7 µA quiescent current extends single-charge runtime by >12 months; 1 V operational limit covers full discharge curve. |
| Automotive Body Control Module | Smart Energy Meter |
|
Use Scenario: Supervision of 5 V microcontroller supply in BCM exposed to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Immune-to-transient voltage detector providing glitch-free reset during ISO 7637-2 pulse 5a/b events. Use Value: Internal transient rejection eliminates need for external RC filtering; -40°C to +125°C rating meets AEC-Q100 Grade 2. |
Use Scenario: Tamper-resistant electricity meter with real-time clock and metrology SoC requiring guaranteed boot integrity. IC Role / Device Role / Timing Role: System-level power-on reset source for dual-core metering ASIC, synchronized to AC line zero-crossing startup. Use Value: Push-pull output drives ASIC /RESET directly without pull-up; 4.63 V threshold aligns with 5 V LDO dropout margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3-T | 4.63 V threshold, 240 ms reset timeout, but 15 µA supply current (vs. 7 µA); SOT23-3 package. | Higher ICC reduces battery life in portable designs; identical timing and threshold enable drop-in replacement where power budget allows. | Select if legacy MAXIM design reuse is required; verify thermal derating at 125°C due to higher ICC. |
| TPS3808G33DBVR | 3.3 V threshold (not 4.63 V); adjustable timeout via capacitor; 1.1 µA ICC - incompatible threshold, different function scope. | Not a functional substitute: intended for 3.3 V systems, not 5 V brown-out detection; requires external timing cap. | Reject for this application - mismatched threshold invalidates core supervisory function. |
Compared with MAX809TRD3-T, APX809S00-46SR-7 delivers 53% lower quiescent current for extended battery life, while matching threshold and timeout; TPS3808G33DBVR is unsuitable due to 3.3 V rating and configurability that adds BOM cost and layout complexity.
Availability
APX809S00-46SR-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for APX809S00-46SR-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, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and the U.S.
The APX809S/810S series belongs to Diodes' µP supervisory product line, engineered specifically for low-cost, high-reliability power monitoring in resource-constrained embedded systems - emphasizing minimal external components, wide temperature operation, and green packaging compliance.
FAQ
What is the exact reset threshold voltage of APX809S00-46SR-7 and how tightly is it specified?
The APX809S00-46SR-7 has a nominal reset threshold of 4.63 V, with a guaranteed range of 4.57 V to 4.69 V at +25°C. Over the full -40°C to +125°C operating range, the threshold drift is limited to ±0.03 V (30 ppm/°C), ensuring consistent performance across environmental conditions without recalibration.
Does APX809S00-46SR-7 require an external pull-up resistor on the RESET pin?
No. The APX809S00-46SR-7 features a push-pull output stage, meaning its RESET pin actively drives both high and low states. When not asserting reset, it outputs a logic-high voltage ≥0.8×VCC (up to VCC–1.5 V), eliminating the need for an external pull-up resistor and reducing BOM count and board area.
Can APX809S00-46SR-7 operate reliably during fast power supply transients?
Yes. The internal reset comparator is explicitly designed to reject fast transients on VCC, as confirmed in the datasheet's "Reset Comparator Transient Immunity" specification. This prevents false resets during switching noise, load dump pulses, or ESD-induced supply disturbances - critical for automotive and industrial environments.
Is APX809S00-46SR-7 compliant with modern environmental regulations?
Yes. It is fully RoHS 3 compliant (2015/863/EU), halogen-free (<900 ppm Br+Cl), antimony-free (<1000 ppm Sb), and lead-free - meeting Diodes Incorporated's "Green" compound standard. No bromine, chlorine, or antimony compounds are intentionally added, and it carries no Br/Sb markings per JEDEC J-STD-609.
APX809S00-46SR-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:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX809S00-46SR-7 FAQ
1.How can I place an order for APX809S00-46SR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX809S00-46SR-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 APX809S00-46SR-7 reliable?
The price and inventory of APX809S00-46SR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX809S00-46SR-7 is usually 5 days.
3.What payment methods are accepted for APX809S00-46SR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX809S00-46SR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX809S00-46SR-7?
APX809S00-46SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX809S00-46SR-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 APX809S00-46SR-7?
For technical support, including APX809S00-46SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX809S00-46SR-7 requirements.
6.How does Aetrix verify that APX809S00-46SR-7 is sourced from the original manufacturer or authorized distributors?
All APX809S00-46SR-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 APX809S00-46SR-7 meets industry standards.
7.What is the process for return or replacement of APX809S00-46SR-7?
All APX809S00-46SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX809S00-46SR-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 APX809S00-46SR-7 part is unused and in its original packaging.
Return procedure for APX809S00-46SR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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