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Diodes Incorporated APX809S00-26SR-7
- Part No.:
- APX809S00-26SR-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX809S00-26SR-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,314
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Product details
Overview
APX809S00-26SR-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory functions in digital systems. It provides active-low reset assertion when VCC drops below 2.63 V (typ.), guarantees valid reset output down to VCC = 1.0 V, and delivers a 240 ms minimum reset timeout after power recovery. Used in portable battery-powered equipment requiring low ICC (7 µA typ.) and SOT23-3 footprint.
For engineers reviewing the APX809S00-26SR-7 datasheet, APX809S00-26SR-7 pinout, APX809S00-26SR-7 application, or APX809S00-26SR-7 equivalent, key selection criteria include reset threshold accuracy (±0.04 V), push-pull output drive capability (1.2 mA sink), temperature-stable operation (−40°C to +125°C), and guaranteed functionality at VCC ≥ 1.0 V.
Technical Context
The APX809S00-26SR-7 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 2.63 V threshold. Its internal timing circuit ensures a minimum 240 ms reset pulse width after VCC rises above threshold, independent of supply ramp rate.
Designed for single-supply operation from 1.0 V to 5.5 V, it features push-pull output logic with no external pull-up required. The reset comparator rejects fast transients on VCC and maintains defined logic states across full operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63 V (typ.), ±0.04 V tolerance - ensures reliable detection of 2.6 V nominal supply droop |
| Supply Current | 7 µA (typ.) - enables multi-year battery life in always-on monitoring applications |
| Reset Timeout | 240 ms (min.) - meets JEDEC JESD8-12B power-on reset duration requirements |
| Operating Voltage Range | 1.0 V to 5.5 V - supports valid reset assertion even during brownout or deep discharge |
| Output Type | Active-low push-pull - eliminates need for external pull-up resistor and reduces BOM count |
| Temperature Range | −40°C to +125°C - qualified for industrial and automotive under-hood environments |
| Reset Response Delay | 20 µs (max.) - detects rapid VCC dips without missing critical fault events |
Pinout & Package
APX809S00-26SR-7 is housed in a RoHS-compliant, halogen-free SOT23-3 package (SR variant) with 1.3 mm × 2.9 mm footprint and 0.95 mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground node for internal comparator and output stage |
| 2 | RESET | Active-low push-pull reset output - drives low to assert reset, high-impedance when inactive |
| 3 | VCC | Power supply input - powers internal circuitry and defines reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.63 V threshold | ±0.04 V tolerance over −40°C to +125°C - eliminates calibration in production |
| Push-pull active-low output | 1.2 mA sink capability at VCC ≥ 2.4 V - directly interfaces µP RESET# pins without external components |
| Ultra-low ICC | 7 µA typical supply current - extends battery life in coin-cell–powered IoT sensors |
| Valid reset at 1.0 V VCC | Guaranteed logic state down to 1.0 V - ensures fail-safe behavior during deep brownout |
| SOT23-3 "Green" package | Lead-free, halogen-free, antimony-free - meets IPC-1752A Class 3 material declarations |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose monitors and wearable ECG patches require reliable power-on reset and brownout detection during intermittent charging cycles. IC Role / Device Role / Timing Role: Voltage detector providing active-low reset signal to ARM Cortex-M0+ MCU upon VCC drop below 2.63 V. Use Value: 7 µA quiescent current enables >5-year shelf life on CR2032; 240 ms timeout prevents spurious resets during Li-ion charge termination dips. | Use Scenario: DIN-rail mounted PLC modules operate in harsh factory environments with wide ambient temperature swings and noisy 24 V DC supplies. IC Role / Device Role / Timing Role: Supervisory IC asserting reset to FPGA configuration controller when 3.3 V auxiliary rail falls due to transient load surges. Use Value: −40°C to +125°C operation ensures reliability in uncooled enclosures; 30 ppm/°C threshold drift minimizes false triggers across temperature. |
| Smart Metering Subsystems | Automotive Body Control Modules |
Use Scenario: Electricity meters with dual-supply architecture (mains + backup supercapacitor) must detect failure of primary 3.3 V rail before switching to backup. IC Role / Device Role / Timing Role: Primary rail supervisor generating clean reset pulse to metering SoC during AC dropout events. Use Value: Valid reset assertion at VCC = 1.0 V ensures detection of slow decay during supercapacitor discharge; push-pull output avoids weak pull-up limitations. | Use Scenario: BCMs monitor 5 V CAN transceiver supply and 3.3 V microcontroller rail in vehicles where cold-cranking causes 1.2 V dips on main battery line. IC Role / Device Role / Timing Role: Dual-rail supervision via separate APX809S units - one for 5 V CAN bus, one for 3.3 V MCU domain. Use Value: 20 µs response time captures sub-millisecond dips during cranking; 240 ms timeout satisfies ISO 16750-2 cold-cranking recovery timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB26DBZR | 2.63 V threshold, 350 ms reset timeout, 1.8 µA ICC (typ.), open-drain output | Requires external pull-up; longer timeout may delay system boot in time-critical applications | Select if ultra-low ICC dominates design priority and board space allows pull-up resistor |
| MAX809SEUR+T | 2.63 V threshold, 240 ms timeout, 15 µA ICC (typ.), push-pull output, wider VCC range (1.0–6.0 V) | Higher supply current reduces battery life; same pinout but different marking and tape/reel packaging | Select if compatibility with legacy MAX809-based designs is required and 15 µA ICC is acceptable |
Compared with TLV803EB26DBZR and MAX809SEUR+T, APX809S00-26SR-7 offers optimal balance: push-pull output eliminates BOM overhead, 7 µA ICC outperforms MAX809, and 240 ms timeout matches industry-standard boot sequencing windows better than TLV803's 350 ms.
Availability
APX809S00-26SR-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and smart metering subsystems requiring stable component supply and long-term lifecycle support.
Supply support for APX809S00-26SR-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, 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 cost-sensitive, space-constrained applications requiring precision voltage monitoring and guaranteed reset timing in battery-powered and industrial systems.
FAQ
What is the exact reset threshold voltage for APX809S00-26SR-7?
The APX809S00-26SR-7 has a nominal reset threshold of 2.63 V, with guaranteed min/max values of 2.59 V and 2.67 V respectively at +25°C. This value remains stable across temperature with a maximum drift of ±30 ppm/°C from −40°C to +125°C, ensuring consistent performance in varying thermal environments.
Does APX809S00-26SR-7 require an external pull-up resistor on the RESET pin?
No. APX809S00-26SR-7 features a push-pull output stage that actively drives the RESET pin low during reset and high during normal operation. Unlike open-drain supervisors, it requires no external pull-up resistor, reducing component count and PCB area while improving noise immunity and rise/fall time control.
Can APX809S00-26SR-7 operate reliably at VCC = 1.2 V?
Yes. The device guarantees correct logic state on the RESET pin down to VCC = 1.0 V, including proper assertion and de-assertion timing. At 1.2 V, it fully meets all electrical specifications: reset threshold remains accurate, 240 ms timeout is maintained, and output sink capability exceeds 1.2 mA - enabling robust brownout detection in deeply discharged battery scenarios.
What is the difference between SR and SA package suffixes for APX809S parts?
The SR and SA suffixes denote identical SOT23-3 mechanical packages but differ in lead frame plating and marking layout. SR uses a matte tin finish optimized for reflow soldering consistency, while SA uses bright tin. Both meet the same RoHS, halogen-free, and reliability standards; the choice depends on assembly process validation and existing line qualification.
APX809S00-26SR-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:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX809S00-26SR-7 FAQ
1.How can I place an order for APX809S00-26SR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX809S00-26SR-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 APX809S00-26SR-7 reliable?
The price and inventory of APX809S00-26SR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX809S00-26SR-7 is usually 5 days.
3.What payment methods are accepted for APX809S00-26SR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX809S00-26SR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX809S00-26SR-7?
APX809S00-26SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX809S00-26SR-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 APX809S00-26SR-7?
For technical support, including APX809S00-26SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX809S00-26SR-7 requirements.
6.How does Aetrix verify that APX809S00-26SR-7 is sourced from the original manufacturer or authorized distributors?
All APX809S00-26SR-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 APX809S00-26SR-7 meets industry standards.
7.What is the process for return or replacement of APX809S00-26SR-7?
All APX809S00-26SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX809S00-26SR-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 APX809S00-26SR-7 part is unused and in its original packaging.
Return procedure for APX809S00-26SR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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