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Diodes Incorporated APX809-26SAG-7
- Part No.:
- APX809-26SAG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX809-26SAG-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,570
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Product details
Overview
APX809-26SAG-7 from Diodes Incorporated is a 3-pin SOT23 microprocessor supervisory IC with active-low push-pull RESET output, 2.63 V ±0.06 V reset threshold (typ./max), 200 ms typical reset timeout, 30 µA supply current (typ.), and guaranteed valid reset assertion down to VCC = 1 V. It monitors 3.0 V/3.3 V digital power rails in embedded controllers and portable equipment.
For engineers reviewing the APX809-26SAG-7 datasheet, APX809-26SAG-7 pinout, APX809-26SAG-7 application, or APX809-26SAG-7 equivalent, key selection criteria include precise 2.63 V threshold tolerance, SOT23 footprint compatibility, push-pull drive strength (1.2 mA sink), temperature-stable reset timing (±30 ppm/°C tempco), and RoHS-compliant green packaging.
Technical Context
The APX809-26SAG-7 integrates a precision voltage comparator with internal reference and a monostable delay circuit to generate a minimum 140 ms (min) / 200 ms (typ) / 280 ms (max) active-low reset pulse after VCC rises above 2.63 V. Its comparator ignores fast transients and maintains correct logic state across -40°C to +85°C ambient.
Designed for direct connection to µP reset inputs, it delivers rail-to-rail push-pull output swing: VOL ≤ 0.3 V at 1.2 mA sink and VOH ≥ 0.8VCC at 500 µA source. The device draws only 30 µA at 3.3 V and remains functional down to VCC = 1 V - ensuring reliable brownout detection before system collapse.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63 V (typ), 2.59–2.69 V (min–max); precisely matches 3.0 V supply systems requiring ≥3% margin below nominal. |
| Reset Timeout | 200 ms (typ), 140–280 ms (min–max); exceeds JEDEC JESD8-12B 140 ms minimum for safe µP initialization. |
| Supply Current | 30 µA (typ) at +25°C; enables multi-year battery life in coin-cell–powered IoT sensors and wearables. |
| Output Type | Push-pull active-low RESET; eliminates need for external pull-up resistor and supports direct CMOS input drive. |
| VCC Validity Range | Operates and asserts valid RESET down to VCC = 1 V; ensures deterministic reset behavior during deep brownouts. |
| Temperature Range | -40°C to +85°C operating ambient; validated across full industrial range without derating. |
| Reset Tempco | 30 ppm/°C; limits threshold drift to <±12 mV over -40°C to +85°C, critical for stable reset margins. |
Pinout & Package
APX809-26SAG-7 is housed in a RoHS-compliant, halogen-free SOT23-3 (SA package) with 2.4 mm × 1.3 mm footprint and 0.95 mm height. Thermal resistance is θJA = 201°C/W on standard FR-4 PCB with 2 oz copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VCC) | Positive Supply Input | Accepts 1.1–5.5 V DC; powers internal comparator and driver; must be decoupled locally with 100 nF ceramic capacitor. |
| 2 (GND) | Ground Reference | Low-impedance return path for reset output current and comparator bias; requires solid plane connection. |
| 3 (RESET) | Active-Low Push-Pull Output | Drives µP reset pin low during fault; sinks up to 1.2 mA; no external pull-up needed; floats high when inactive. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.63 V threshold | ±2.3% tolerance over -40°C to +85°C ensures consistent reset activation across 3.0 V supply variations. |
| Guaranteed reset validity to 1 V | Enables fail-safe reset assertion even as battery voltage collapses below logic thresholds. |
| No external components required | Integrates reference, comparator, timer, and driver - reduces BOM count and PCB area vs discrete solutions. |
| Push-pull output stage | Eliminates pull-up resistor, reduces standby leakage, and improves noise immunity on reset line. |
| Green SOT23 package | Lead-free, halogen-free, antimony-free molding compound compliant with EU RoHS 2011/65/EU and JEDEC JS709C. |
Applications
| Industrial PLC Controllers | Portable Medical Sensors |
|---|---|
|
Use Scenario: Microcontroller-based programmable logic controllers deployed in factory automation environments with fluctuating 3.3 V supply rails. IC Role / Device Role / Timing Role: Supervises main 3.3 V VCC rail and asserts active-low RESET to ARM Cortex-M4 core during brownout events. Use Value: Prevents corrupted I/O register writes and firmware lockup by guaranteeing ≥200 ms reset hold time after recovery. |
Use Scenario: Battery-powered glucose meters and pulse oximeters requiring ultra-low-power operation and deterministic startup. IC Role / Device Role / Timing Role: Monitors 3.0 V LDO output powering ADC and BLE SoC; triggers reset if battery drops below 3.1 V. Use Value: 30 µA quiescent current extends single-CR2032 battery life beyond 24 months; 2.63 V threshold aligns with sensor analog front-end headroom. |
| Smart Energy Meters | Automotive Body Control Modules |
|
Use Scenario: ANSI C12.20-certified electricity meters with dual-supply architecture (5 V MCU + 3.3 V communication IC). IC Role / Device Role / Timing Role: Dedicated supervisor for 3.3 V isolated RS-485 transceiver supply; provides clean reset independent of main MCU rail. Use Value: Push-pull output drives transceiver EN pin directly; eliminates risk of floating reset state during cold-cranking voltage sag. |
Use Scenario: 12 V automotive body control modules using buck-converted 3.3 V domain for door module microcontrollers. IC Role / Device Role / Timing Role: Resets Infineon AURIX TC3xx MCU during load-dump-induced 3.3 V droop below 2.63 V. Use Value: 30 ppm/°C tempco maintains reset accuracy across under-hood temperatures (-40°C to +105°C junction). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2T | 2.63 V threshold, same SOT23-3, but open-drain output requiring external pull-up; 25 µA ICC (typ). | Lacks push-pull drive; unsuitable where µP reset pin has weak internal pull-up or high capacitive loading. | Select only if board layout already includes 10 kΩ pull-up and space constraints prohibit redesign. |
| TPS3808G12DBVR | 2.63 V threshold, push-pull output, but 6-pin SOT23-6 package; adjustable delay via external capacitor; 1.1 µA ICC (typ). | Requires additional PCB real estate and capacitor routing; lower ICC benefits ultra-low-power designs but adds complexity. | Prefer for new designs needing programmable timeout or sub-µA standby, not drop-in replacement. |
Compared with MAX809TRD2T and TPS3808G12DBVR, APX809-26SAG-7 offers optimal balance of push-pull simplicity, SOT23-3 footprint, and industrial-grade temperature stability - making it ideal for cost-sensitive, space-constrained embedded controllers where fixed 200 ms timeout suffices.
Availability
APX809-26SAG-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical sensors, smart energy meters, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for APX809-26SAG-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 integrated circuits, specializing in high-reliability power management, signal integrity, and protection devices for industrial, computing, and consumer markets.
The APX809 series belongs to Diodes' microprocessor supervisory product line, engineered specifically for cost-effective, footprint-efficient power-rail monitoring in resource-constrained embedded systems with strict reset timing and accuracy requirements.
FAQ
What is the exact reset threshold voltage for APX809-26SAG-7 at +25°C?
The reset threshold is 2.63 V (typical), with guaranteed min/max values of 2.59 V and 2.69 V respectively across -40°C to +85°C ambient. This value is laser-trimmed during production and specified in DS31322 Rev. 5–3, Table 1, row "APX809/810-26".
Does APX809-26SAG-7 require an external capacitor for reset timing?
No. The 200 ms typical reset timeout is generated by an internal monostable circuit; no external timing capacitor is needed. This eliminates component count, placement error risk, and temperature drift associated with discrete RC networks.
Can APX809-26SAG-7 drive a reset input with 100 pF capacitance?
Yes. Its push-pull output delivers 1.2 mA sink current at VOL ≤ 0.3 V, enabling fast edge rates and robust noise immunity into typical µP reset pins (typically 5–100 pF). Rise/fall times remain under 100 ns with ≤100 pF load per DS31322 Figure 6.
Is APX809-26SAG-7 qualified for automotive AEC-Q100?
No. APX809-26SAG-7 is rated for industrial temperature range (-40°C to +85°C ambient) and is not AEC-Q100 qualified. For automotive applications, Diodes recommends the pin-compatible APX809-26W5-7 (AEC-Q100 Grade 2, -40°C to +105°C).
APX809-26SAG-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:
- Not For New Designs
- 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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX809-26SAG-7 FAQ
1.How can I place an order for APX809-26SAG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX809-26SAG-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 APX809-26SAG-7 reliable?
The price and inventory of APX809-26SAG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX809-26SAG-7 is usually 5 days.
3.What payment methods are accepted for APX809-26SAG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX809-26SAG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX809-26SAG-7?
APX809-26SAG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX809-26SAG-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 APX809-26SAG-7?
For technical support, including APX809-26SAG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX809-26SAG-7 requirements.
6.How does Aetrix verify that APX809-26SAG-7 is sourced from the original manufacturer or authorized distributors?
All APX809-26SAG-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 APX809-26SAG-7 meets industry standards.
7.What is the process for return or replacement of APX809-26SAG-7?
All APX809-26SAG-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX809-26SAG-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 APX809-26SAG-7 part is unused and in its original packaging.
Return procedure for APX809-26SAG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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