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Diodes Incorporated APX809S00-44SA-7
- Part No.:
- APX809S00-44SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX809S00-44SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,785
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Product details
Overview
APX809S00-44SA-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 drops below 4.38V (typ), maintains reset for ≥240ms after recovery, and guarantees valid output down to VCC = 1V. Its 7µA supply current and push-pull output make it suitable for battery-powered controllers and portable instrumentation.
For engineers reviewing the APX809S00-44SA-7 datasheet, APX809S00-44SA-7 pinout, APX809S00-44SA-7 application, or APX809S00-44SA-7 equivalent, key selection criteria include reset threshold accuracy (±0.06V), temperature coefficient (30ppm/°C), guaranteed operation at 1V supply, 240ms timeout, and SOT23-3 package compatibility with space-constrained PCB layouts.
Technical Context
The APX809S00-44SA-7 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 4.38V threshold. Its internal timing circuit ensures minimum 240ms reset pulse width after VCC exceeds VTH, independent of external components.
It features push-pull output stage capable of sinking 1.2mA at VOL ≤0.3V and sourcing 500µA at VOH ≥0.8×VCC, with immunity to fast VCC transients and full specification over −40°C to +125°C ambient range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V (typ), ±0.06V tolerance - ensures reliable reset initiation for +5V systems with margin against ripple and drift |
| Reset Timeout | 240ms (min) - guarantees sufficient hold time for µP initialization across power-up sequencing |
| Supply Current | 7µA (typ) - enables multi-year battery life in always-on monitoring applications |
| Valid Operation Range | VCC ≥1.0V - supports brown-out detection and reset assertion even during deep undervoltage conditions |
| Output Type | Active-low push-pull - eliminates need for external pull-up resistor and ensures defined logic state at all VCC levels |
| Temp Coefficient | 30ppm/°C - limits threshold drift to <±24mV over −40°C to +125°C, critical for industrial reliability |
| ESD Rating | HBM 6kV - provides robust handling in manufacturing and field environments without additional protection |
Pinout & Package
APX809S00-44SA-7 is housed in a RoHS-compliant, halogen-free SOT23-3 package (JEDEC TO-236AB), measuring 2.9mm × 1.3mm × 1.0mm, with gull-wing leads optimized for automated reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Return path for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 (RESET) | Active-Low Reset Output | Push-pull driver asserting logic LOW during reset; sinks up to 1.2mA while maintaining VOL ≤0.3V |
| 3 (VCC) | Supply Input | Monitored power rail input; device operates and asserts reset down to 1.0V, enabling ultra-low-voltage supervision |
Key Features
| Feature | Design Value |
|---|---|
| Precision Voltage Monitoring | 4.38V threshold with ±0.06V tolerance and 30ppm/°C drift - ensures consistent reset behavior across temperature and unit variance |
| No External Components Required | Integrated reference, comparator, and timing - reduces BOM count, PCB area, and qualification effort versus discrete solutions |
| Guaranteed Reset Validity to 1V | Functional reset assertion and output logic integrity maintained down to VCC = 1.0V - supports fail-safe shutdown in severe brown-out events |
| Low 7µA Supply Current | Enables continuous supervision in energy-harvesting and coin-cell-powered devices without compromising battery lifetime |
| SOT23-3 "Green" Package | Lead-free, halogen-free (Br+Cl <1500ppm, Sb <1000ppm), RoHS 3 compliant - meets global environmental compliance mandates |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
|
Use Scenario: Supervising 5V logic rails in programmable logic controllers exposed to wide ambient temperatures and EMI. IC Role / Device Role / Timing Role: Voltage detector providing active-low reset signal to ARM Cortex-M7 MCU during power-up and brown-out events. Use Value: 240ms minimum reset pulse ensures full register initialization before code execution; 30ppm/°C threshold stability prevents spurious resets in −40°C to +85°C enclosures. |
Use Scenario: Power monitoring in handheld ECG units powered by single Li-ion cells with buck-boost regulation to 5V. IC Role / Device Role / Timing Role: Supervisory IC asserting reset when regulated 5V rail falls below 4.38V due to battery sag or load transients. Use Value: 7µA quiescent current extends battery runtime; guaranteed operation down to 1V allows reset assertion even during deep discharge before shutdown. |
| Smart Energy Meters | Automotive Body Control Modules |
|
Use Scenario: Ensuring reliable µC reset during AC mains interruptions and capacitor hold-up decay in DIN-rail meters. IC Role / Device Role / Timing Role: Primary reset supervisor for dual-core metering SoC, interfacing directly with reset input pins. Use Value: Push-pull output eliminates external pull-up, reducing component count; HBM 6kV ESD rating withstands field ESD events during installation/maintenance. |
Use Scenario: Monitoring 5V supply derived from vehicle battery via LDO in door module ECUs operating at −40°C to +125°C. IC Role / Device Role / Timing Role: Voltage supervisor triggering controlled firmware restart upon ignition cycle transitions or alternator dropout. Use Value: Full −40°C to +125°C specification matches under-hood thermal requirements; 4.38V threshold aligns with automotive 5V rail tolerance bands. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 4.63V threshold, 140ms min reset timeout, 1.6µA ICC, SOT23-3 | Higher threshold and shorter timeout - better suited for 5V systems requiring tighter margin above nominal rail | Select when system requires earlier reset assertion and lower power; verify timeout sufficiency for target µP startup sequence. |
| TPS3808G01DBVR | Adjustable threshold (via external resistor), 200ms typ timeout, 1.1µA ICC, SOT23-6 | Requires external resistor network and occupies larger footprint - adds design flexibility but increases BOM and layout complexity | Choose only if programmable threshold is mandatory; otherwise, APX809S00-44SA-7 offers simpler, lower-cost, and smaller-footprint solution. |
Compared with MAX809SEUR+T and TPS3808G01DBVR, APX809S00-44SA-7 delivers optimal balance of precision (±0.06V), industry-standard 240ms timeout, and ultra-low 7µA supply current in the smallest possible SOT23-3 footprint-making it ideal for cost-sensitive, space-constrained, and battery-operated 5V supervisory applications.
Availability
APX809S00-44SA-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 with guaranteed long-term availability.
Supply support for APX809S00-44SA-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, energy-efficient components for industrial, computing, and automotive markets.
The APX809S/810S series was developed specifically for microprocessor supervisory functions in cost-sensitive, low-power embedded systems-emphasizing precision threshold accuracy, minimal external components, and extended temperature operation.
FAQ
What is the exact reset threshold voltage for APX809S00-44SA-7?
The APX809S00-44SA-7 has a nominal reset threshold of 4.38V (typical), with guaranteed minimum 4.32V and maximum 4.44V across temperature and process variation per DS39140 Rev. 2–2. This value is factory-trimmed and specified at TA = +25°C, with 30ppm/°C temperature coefficient ensuring ≤±24mV drift over −40°C to +125°C.
Does APX809S00-44SA-7 require an external pull-up resistor on the RESET pin?
No. APX809S00-44SA-7 features a push-pull output stage that actively drives RESET low during fault conditions and high during normal operation. Unlike open-drain supervisors, it does not require an external pull-up resistor, simplifying schematic design and eliminating associated leakage and noise sensitivity.
Can APX809S00-44SA-7 operate reliably at VCC = 1.2V?
Yes. The device guarantees correct reset assertion and logic-level output behavior down to VCC = 1.0V, as confirmed in the Recommended Operating Conditions table. At 1.2V, RESET remains asserted until VCC rises above 4.32V, and the output maintains VOL ≤0.3V when sinking 1.2mA - enabling robust brown-out detection far below nominal supply.
What is the meaning of "00" in the part number APX809S00-44SA-7?
The "00" suffix denotes the reset timeout variant: APX809S00 indicates 1.7ms typical reset pulse width, but the full part number APX809S00-44SA-7 is misaligned with standard ordering - per Diodes' documentation, "-44" refers to 4.38V threshold and "SA" to SOT23 package; the "00" here is superseded by the "-44" voltage code, and actual timeout is 240ms (standard for non-"00"/"05" variants). True 240ms behavior is confirmed in Electrical Characteristics table for "APX809S/810S-XX" rows.
APX809S00-44SA-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:
- 4.38V
- 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
APX809S00-44SA-7 FAQ
1.How can I place an order for APX809S00-44SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX809S00-44SA-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 APX809S00-44SA-7 reliable?
The price and inventory of APX809S00-44SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX809S00-44SA-7 is usually 5 days.
3.What payment methods are accepted for APX809S00-44SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX809S00-44SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX809S00-44SA-7?
APX809S00-44SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX809S00-44SA-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 APX809S00-44SA-7?
For technical support, including APX809S00-44SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX809S00-44SA-7 requirements.
6.How does Aetrix verify that APX809S00-44SA-7 is sourced from the original manufacturer or authorized distributors?
All APX809S00-44SA-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 APX809S00-44SA-7 meets industry standards.
7.What is the process for return or replacement of APX809S00-44SA-7?
All APX809S00-44SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX809S00-44SA-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 APX809S00-44SA-7 part is unused and in its original packaging.
Return procedure for APX809S00-44SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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