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Diodes Incorporated APX809S05-26SR-7
- Part No.:
- APX809S05-26SR-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX809S05-26SR-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,827
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Product details
Overview
APX809S05-26SR-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory functions in 2.6V supply systems. It provides active-low push-pull reset assertion when VCC falls below 2.63V (typ.), maintains reset for ≥240ms after recovery, and operates down to 1V supply with only 7µA typical supply current. Used in portable battery-powered equipment requiring reliable power-on reset.
For engineers reviewing the APX809S05-26SR-7 datasheet, APX809S05-26SR-7 pinout, APX809S05-26SR-7 application, or APX809S05-26SR-7 equivalent, key selection criteria include reset threshold accuracy (±0.04V), guaranteed reset validity at VCC = 1V, 240ms minimum timeout, SOT23-SR package compatibility, and push-pull output drive capability up to 1.2mA sink.
Technical Context
The APX809S05-26SR-7 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 2.63V threshold. Its internal timing circuit ensures a minimum 240ms reset pulse width after VCC exceeds the threshold by ≥2%, independent of supply ramp rate.
Designed for low-noise immunity, the reset comparator rejects fast transients on VCC and guarantees correct logic state for VCC ≥1.0V. The push-pull output eliminates need for external pull-up resistors and supports direct interface to µP reset inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V (typ.), ±0.04V tolerance - ensures accurate 2.6V supply monitoring without calibration |
| Reset Timeout | 240ms (min) - guarantees sufficient hold time for µP initialization sequences |
| Supply Current | 7µA (typ.) - enables multi-year operation in coin-cell–powered devices |
| Valid VCC Range | 1.0V to 5.5V - allows reset assertion even during brownout or deep discharge |
| Output Type | Active-low push-pull - drives reset line directly without external components |
| Temp Coefficient | 30ppm/°C - maintains threshold stability across –40°C to +125°C ambient |
| Reset Delay | 20µs (max) - responds rapidly to supply dips while ignoring sub-20µs noise |
Pinout & Package
APX809S05-26SR-7 is housed in a RoHS-compliant, halogen-free SOT23-3 (SR) package with 1.3mm pitch, optimized for high-density PCB layouts and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage |
| 2 | RESET | Active-low push-pull reset output - sinks 1.2mA at 0.3V max |
| 3 | VCC | Power supply input - powers internal circuitry and defines detection threshold |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.63V threshold | Enables reliable supervision of 2.6V logic rails without trimming or external feedback |
| 240ms minimum reset timeout | Meets JEDEC JESD85 requirements for µP power-on sequencing in embedded controllers |
| 1V valid reset operation | Ensures deterministic reset behavior during battery depletion or cold-start conditions |
| 7µA supply current | Reduces quiescent power by >90% vs. discrete RC-based reset circuits |
| Push-pull output | Eliminates external pull-up resistor, saving board space and BOM cost |
Applications
| Battery-Powered IoT Sensor Node | Industrial PLC I/O Module |
|---|---|
Use Scenario: A wireless temperature sensor node powered by a CR2032 coin cell must retain memory integrity and initiate clean boot after voltage sag. IC Role / Device Role / Timing Role: Voltage detector providing power-on reset and brownout protection for ARM Cortex-M0+ MCU. Use Value: 7µA supply current extends battery life beyond 5 years; 240ms timeout ensures full RAM initialization before firmware execution. | Use Scenario: An isolated digital input module in a factory automation system requires stable reset during 24VDC-to-3.3V conversion fluctuations. IC Role / Device Role / Timing Role: Supervisory IC asserting reset to FPGA configuration logic during 3.3V rail instability. Use Value: 30ppm/°C threshold drift prevents false resets across –25°C to +70°C operating range; push-pull output drives FPGA PROG_B pin directly. |
| Medical Wearable ECG Monitor | Automotive Body Control Module (BCM) |
Use Scenario: A wearable ECG patch uses a low-voltage LDO (2.6V output) to power analog front-end and BLE SoC; supply droop must trigger immediate safe shutdown. IC Role / Device Role / Timing Role: Precision voltage supervisor triggering controlled shutdown sequence via SoC interrupt pin. Use Value: 2.63V threshold matches LDO nominal output; 1V valid operation ensures reset remains asserted until complete power collapse. | Use Scenario: A BCM microcontroller monitors 12V battery-derived 2.6V auxiliary rail for infotainment subsystem power sequencing. IC Role / Device Role / Timing Role: Reset generator ensuring µC enters known state during ignition cycling and load-dump events. Use Value: Immunity to 20µs transients prevents spurious resets during alternator switching; SOT23-SR footprint fits constrained under-hood layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2T1G | 2.63V threshold, 240ms timeout, open-drain output | Requires external pull-up resistor; higher 12µA supply current | Select if legacy design uses open-drain topology or needs Maxim's qualification for automotive temp range |
| TPS3808G12QDBVRQ1 | 2.63V threshold, adjustable timeout (1.25ms–10s), 1.8µA supply current | Requires external capacitor for timing; larger SOT23-6 footprint | Select if programmable timeout or ultra-low current (<2µA) is prioritized over component count |
Compared with MAX809TRD2T1G and TPS3808G12QDBVRQ1, APX809S05-26SR-7 delivers lowest BOM count (no pull-up or timing cap), smallest footprint (SOT23-3), and optimal balance of 7µA current and 240ms fixed timeout for cost-sensitive portable designs.
Availability
APX809S05-26SR-7 is available at Aetrix Electronics and suitable for battery-powered IoT sensors, industrial PLC modules, medical wearables, and automotive body control units requiring stable component supply with full traceability and long-lifecycle support.
Supply support for APX809S05-26SR-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 consumer markets.
The APX809S/810S series belongs to Diodes' µP supervisory product line, engineered specifically for low-power, precision voltage monitoring in space-constrained portable and embedded systems.
FAQ
What is the exact reset threshold voltage for APX809S05-26SR-7?
The APX809S05-26SR-7 has a guaranteed reset threshold of 2.59V (min), 2.63V (typ.), and 2.67V (max) at +25°C, with ±0.04V tolerance across –40°C to +125°C due to its 30ppm/°C temperature coefficient. This matches nominal 2.6V supply rails in low-power microcontrollers and analog subsystems.
Does APX809S05-26SR-7 require an external pull-up resistor?
No. APX809S05-26SR-7 features a push-pull RESET output that actively drives low and high states without external components. Its output can sink 1.2mA at ≤0.3V and source current to VCC, eliminating the need for a pull-up resistor and reducing PCB area and BOM cost.
Can APX809S05-26SR-7 operate with a 1.8V supply?
Yes - the device guarantees correct reset logic state for VCC ≥1.0V, including 1.8V operation. However, its 2.63V threshold means it will assert reset continuously at 1.8V, making it unsuitable for monitoring 1.8V rails. It is intended for supervising 2.6V supplies where VCC remains ≥2.6V during normal operation.
What is the difference between SOT23-SA and SOT23-SR packages for this part?
SOT23-SA and SOT23-SR are mechanically identical 3-pin SOT23 packages but differ in leadframe plating and marking layout. SR variant uses matte tin plating and specific top-side marking (e.g., "SS" for APX809S05-26SR-7), while SA uses bright tin and different codes (e.g., "RN"). Both meet same thermal and electrical specs and are PCB-compatible.
APX809S05-26SR-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:
- 2.63V
- 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
APX809S05-26SR-7 FAQ
1.How can I place an order for APX809S05-26SR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX809S05-26SR-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 APX809S05-26SR-7 reliable?
The price and inventory of APX809S05-26SR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX809S05-26SR-7 is usually 5 days.
3.What payment methods are accepted for APX809S05-26SR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX809S05-26SR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX809S05-26SR-7?
APX809S05-26SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX809S05-26SR-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 APX809S05-26SR-7?
For technical support, including APX809S05-26SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX809S05-26SR-7 requirements.
6.How does Aetrix verify that APX809S05-26SR-7 is sourced from the original manufacturer or authorized distributors?
All APX809S05-26SR-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 APX809S05-26SR-7 meets industry standards.
7.What is the process for return or replacement of APX809S05-26SR-7?
All APX809S05-26SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX809S05-26SR-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 APX809S05-26SR-7 part is unused and in its original packaging.
Return procedure for APX809S05-26SR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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