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Diodes Incorporated APX809S05-46SA-7
- Part No.:
- APX809S05-46SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX809S05-46SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
APX809S05-46SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory functions in +5V digital systems. It provides active-low reset assertion when VCC falls below 4.63V (typ), maintains reset for ≥240ms after recovery, and operates with 7µA supply current. Its push-pull output ensures clean logic-level signaling in battery-powered controllers and embedded instrumentation.
For engineers reviewing the APX809S05-46SA-7 datasheet, APX809S05-46SA-7 pinout, APX809S05-46SA-7 application, or APX809S05-46SA-7 equivalent, key selection criteria include reset threshold accuracy (±0.06V), guaranteed operation down to VCC = 1V, 240ms timeout stability over -40°C to +125°C, and SOT23-3 package compatibility with space-constrained PCB layouts.
Technical Context
The APX809S05-46SA-7 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 4.63V threshold. Its internal timing circuit generates a minimum 240ms reset pulse width after VCC exceeds the threshold, independent of external components.
Designed for immunity to fast transients, it guarantees correct RESET logic state across VCC = 1.0V to 5.5V and features push-pull drive capable of sinking 1.2mA at VOL ≤ 0.3V while consuming only 7µA typical supply current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (typ), ±0.06V tolerance - ensures reliable detection of +5V rail brownouts |
| Reset Timeout | 240ms (min) - guarantees sufficient processor initialization time after power recovery |
| Supply Current | 7µA (typ) - enables multi-year operation in coin-cell–powered IoT sensors |
| VCC Operating Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout conditions |
| Output Type | Active-low push-pull - eliminates need for external pull-up resistor, reduces BOM count |
| Temp Range | -40°C to +125°C - qualified for automotive under-hood and industrial control environments |
| Threshold Drift | 30ppm/°C - maintains <0.3% total error across full temperature range |
Pinout & Package
SOT23-3 (SA) package: ultra-compact 2.9mm × 1.3mm surface-mount footprint with 0.95mm pitch, RoHS-compliant, halogen-free molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground return path for internal comparator and output stage |
| 2 | RESET | Active-low push-pull output - drives low (≤0.3V @ 1.2mA) during fault, high-Z when inactive |
| 3 | VCC | Power supply input - powers internal circuitry and defines reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63V threshold | ±0.06V tolerance ensures accurate +5V rail monitoring without calibration |
| No external components | Self-contained reset generation eliminates RC networks and saves PCB area |
| Valid reset at 1V VCC | Enables fail-safe behavior during severe undervoltage events before system collapse |
| 240ms guaranteed timeout | Meets JEDEC JESD76 requirements for microprocessor power-on reset duration |
| 7µA supply current | Reduces quiescent load on backup batteries in always-on monitoring applications |
Applications
| Industrial PLC Controllers | Portable Medical Sensors |
|---|---|
Use Scenario: Monitoring 5V auxiliary rails in programmable logic controllers subject to factory floor voltage fluctuations. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to halt CPU execution until stable 5V is confirmed. Use Value: Prevents corrupted firmware writes during brownout by enforcing ≥240ms reset hold time after recovery. | Use Scenario: Power supervision in handheld glucose meters powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Detecting 5V DC-DC output collapse to trigger controlled shutdown before data loss. Use Value: 7µA supply current extends battery life beyond 3 years in standby mode. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Supervising 5V microcontroller supply in door module ECUs exposed to cold-crank transients. IC Role / Device Role / Timing Role: Reset generator immune to <100ns VCC glitches, asserting RESET until rail stabilizes post-cranking. Use Value: Guaranteed operation down to VCC = 1V prevents false resets during 4.2V cranking dips. | Use Scenario: Ensuring reliable boot sequence in DIN-rail mounted electricity meters with isolated 5V supplies. IC Role / Device Role / Timing Role: Providing deterministic power-on reset timing independent of input capacitor size or ESR. Use Value: Eliminates need for external timing capacitor, reducing component count and field failure modes. |
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 | 4.63V threshold, 240ms timeout, but 15µA supply current and SOT23-3 package | Higher quiescent current limits use in ultra-low-power battery applications | Select when legacy MAXIM footprint compatibility is required and power budget allows 2× higher ICC |
| TPS3808G33DBVR | 3.3V threshold (not 4.63V), adjustable timeout via capacitor, 1.1µA ICC | Requires external timing component and does not match 5V rail monitoring requirement | Choose only if system uses 3.3V core supply and programmable delay is needed |
Compared with MAX809SEUR+T and TPS3808G33DBVR, the APX809S05-46SA-7 uniquely delivers 4.63V detection, 240ms fixed timeout, and 7µA ICC in a drop-in SOT23-3 footprint-making it optimal for cost-sensitive, space-constrained +5V microprocessor supervision where low power and zero external components are mandatory.
Availability
APX809S05-46SA-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical sensors, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for APX809S05-46SA-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, automotive, and consumer markets.
The APX809S/810S series is part of Diodes' supervisory IC product line, engineered specifically for cost-effective, zero-component µP reset generation in space- and power-constrained embedded systems.
FAQ
What is the exact reset threshold voltage for APX809S05-46SA-7?
The APX809S05-46SA-7 has a nominal reset threshold of 4.63V, with a guaranteed range of 4.57V to 4.69V at +25°C. This value is laser-trimmed during production and exhibits a temperature coefficient of 30ppm/°C, ensuring ±0.3% total variation across -40°C to +125°C.
Does APX809S05-46SA-7 require an external pull-up resistor on the RESET pin?
No. The APX809S05-46SA-7 features a push-pull output stage that actively drives RESET low during fault conditions and releases it to high-impedance (not pulled high) when inactive. No external pull-up is needed, simplifying design and reducing component count.
Can APX809S05-46SA-7 operate reliably during cold-crank automotive transients?
Yes. It guarantees correct RESET logic state down to VCC = 1.0V and ignores fast transients (<20µs), making it suitable for automotive body electronics where cold-crank events dip 5V rails to ~4.2V. Its 240ms timeout ensures robust reset hold through transient recovery.
What is the maximum sink current capability of the RESET output?
The RESET output can sink up to 1.2mA while maintaining VOL ≤ 0.3V at VCC = VTH − 0.2V, and up to 3.2mA with VOL ≤ 0.4V under same conditions. This drives standard CMOS inputs directly without buffering in most µP reset circuits.
APX809S05-46SA-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
APX809S05-46SA-7 FAQ
1.How can I place an order for APX809S05-46SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX809S05-46SA-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 APX809S05-46SA-7 reliable?
The price and inventory of APX809S05-46SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX809S05-46SA-7 is usually 5 days.
3.What payment methods are accepted for APX809S05-46SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX809S05-46SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX809S05-46SA-7?
APX809S05-46SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX809S05-46SA-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 APX809S05-46SA-7?
For technical support, including APX809S05-46SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX809S05-46SA-7 requirements.
6.How does Aetrix verify that APX809S05-46SA-7 is sourced from the original manufacturer or authorized distributors?
All APX809S05-46SA-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 APX809S05-46SA-7 meets industry standards.
7.What is the process for return or replacement of APX809S05-46SA-7?
All APX809S05-46SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX809S05-46SA-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 APX809S05-46SA-7 part is unused and in its original packaging.
Return procedure for APX809S05-46SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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