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Diodes Incorporated APX809S05-29SR-7
- Part No.:
- APX809S05-29SR-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX809S05-29SR-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,440
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Product details
Overview
APX809S05-29SR-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory functions in 2.93V nominal supply monitoring applications. It provides active-low push-pull reset assertion when VCC falls below 2.93V (±0.04V), maintains reset for ≥240ms after recovery, operates down to VCC = 1.0V, draws only 7µA typical supply current, and is housed in a RoHS-compliant SOT23-3 (SR) package for portable and battery-powered systems.
For engineers reviewing the APX809S05-29SR-7 datasheet, APX809S05-29SR-7 pinout, APX809S05-29SR-7 application, or APX809S05-29SR-7 equivalent, key selection criteria include reset threshold accuracy (2.93V ±0.04V), guaranteed reset validity at VCC ≥1.0V, 240ms minimum reset timeout, push-pull output drive capability (1.2mA sink), and SOT23-3 (SR) footprint compatibility.
Technical Context
The APX809S05-29SR-7 integrates a precision bandgap reference and comparator to monitor VCC against a factory-trimmed 2.93V threshold with ±0.04V tolerance at +25°C and ±30ppm/°C temperature coefficient. Its internal timing circuit ensures a minimum 240ms reset pulse width after VCC rises above threshold, independent of external components.
It features a push-pull output stage capable of sinking 1.2mA at VOL ≤0.3V (VCC = VTH − 0.2V), guarantees correct logic state down to VCC = 1.0V, and rejects fast transients on VCC via built-in noise immunity-enabling reliable reset generation without external RC networks in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±0.04V at +25°C; enables precise 2.9V system supply monitoring |
| Reset Timeout | ≥240ms after VCC recovery; ensures µP completes full power-up initialization |
| Supply Current | 7µA typical; supports multi-year battery life in always-on portable devices |
| Valid VCC Range | 1.0V to 5.5V; guarantees reset assertion integrity during brownout and deep discharge |
| Output Type | Active-low push-pull; drives logic inputs directly without pull-up resistor |
| Temp Coefficient | ±30ppm/°C; maintains <±1.2% threshold drift over −40°C to +125°C |
| Output Sink | 1.2mA @ VOL ≤0.3V; interfaces reliably with standard CMOS/TTL reset inputs |
Pinout & Package
SOT23-3 (SR) package: 1.4mm × 2.5mm × 1.1mm body, gull-wing leads, RoHS-compliant "Green" molding compound (Br/Cl <1500ppm total, Sb <1000ppm).
| 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 current when asserted |
| 3 | VCC | Power supply input; powers internal circuitry and defines monitored rail |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.93V threshold | Factory-trimmed ±0.04V tolerance enables direct replacement of 3.0V systems without recalibration |
| 240ms minimum reset pulse | Guaranteed timeout eliminates need for external RC timing network and reduces BOM count |
| 1.0V valid operation | Ensures reset remains asserted through deep brownout conditions where µP may lose state |
| 7µA supply current | Reduces quiescent load on coin-cell or energy-harvesting supplies by >90% vs. legacy supervisors |
| Push-pull output | Drives reset lines directly-no external pull-up required-saving PCB area and improving noise immunity |
Applications
| Industrial PLC Controller | Medical Handheld Monitor |
|---|---|
Use Scenario: Monitors 3.0V main supply in programmable logic controller CPU module during AC line fluctuations and backup battery switchover. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to hold ARM Cortex-M7 core in reset until stable 3.0V rail is confirmed. Use Value: 2.93V threshold matches 3.0V system margin; 240ms timeout prevents spurious boot during transient dips; 1.0V validity ensures reset persists during 100ms battery fallback. | Use Scenario: Supervises 2.9V lithium-ion battery–fed power rail in portable ECG device during charge/discharge cycles and low-battery shutdown. IC Role / Device Role / Timing Role: Resets microcontroller and analog front-end upon battery sag below safe operating voltage. Use Value: 7µA quiescent current extends battery runtime by >15% vs. 50µA alternatives; push-pull output eliminates pull-up resistor, reducing leakage paths in high-impedance medical signal chains. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Monitors 3.3V domain supply in BCM during cold-crank (4.5V dip) and load-dump (18V surge) events per ISO 16750-2. IC Role / Device Role / Timing Role: Provides fail-safe reset to MCU and CAN transceiver when supply drops below 2.93V during cranking. Use Value: Guaranteed operation down to VCC = 1.0V ensures reset remains asserted throughout 500ms cranking event; ±30ppm/°C tempco maintains threshold stability across −40°C to +125°C under hood. | Use Scenario: Supervises 2.5V LDO output powering metrology ADC and real-time clock in utility meter with 10-year battery backup. IC Role / Device Role / Timing Role: Generates clean power-on reset and brownout detection for time-critical firmware initialization. Use Value: No external components reduce failure modes in sealed meter housing; RoHS/Green compliance meets EU WEEE and REACH requirements for field-deployed infrastructure. |
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 | 2.93V threshold, 140ms min reset timeout, 1.2µA supply current, SOT23-3 | Lacks guaranteed reset validity below 1.2V; lower IQ but shorter timeout may cause boot instability in slow-ramp systems | Select when ultra-low IQ dominates over robust brownout response |
| TPS3808G33DBVR | 3.3V threshold, adjustable timeout (200ms–10s), 1.8µA IQ, SOT23-6 | Higher threshold and 6-pin package require layout change; timeout adjustability adds flexibility but increases cost | Select when system requires field-programmable timeout or higher threshold margin |
Compared with MAX809SEUR+T and TPS3808G33DBVR, the APX809S05-29SR-7 delivers superior brownout resilience (valid to 1.0V), fixed 240ms timeout optimized for µP startup, and identical 2.93V threshold-making it ideal for cost-sensitive, space-constrained 2.9V systems where deterministic reset behavior is critical.
Availability
APX809S05-29SR-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive body control modules, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for APX809S05-29SR-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 belongs to Diodes' µP supervisory product line, engineered specifically for low-cost, low-power, single-threshold reset generation in battery-powered and embedded systems where board space and quiescent current are critical constraints.
FAQ
What is the exact reset threshold voltage and tolerance for APX809S05-29SR-7?
The APX809S05-29SR-7 has a nominal reset threshold of 2.93V with a tolerance of ±0.04V at +25°C. Over the full operating temperature range (−40°C to +125°C), the threshold drift is limited to ±30ppm/°C, resulting in a maximum deviation of approximately ±1.2% across temperature.
Does APX809S05-29SR-7 require an external pull-up resistor on the RESET pin?
No. The APX809S05-29SR-7 features a push-pull output stage that actively drives the RESET pin low during reset and high otherwise. This eliminates the need for an external pull-up resistor, reducing component count, PCB area, and potential noise coupling on the reset line.
Can APX809S05-29SR-7 operate reliably during severe brownout conditions?
Yes. The device guarantees correct reset logic state down to VCC = 1.0V, ensuring the RESET output remains asserted even during deep brownouts where the supply collapses below 2.0V-critical for preventing partial or corrupted microprocessor initialization in battery-backed systems.
What is the minimum reset pulse width, and how is it timed?
The APX809S05-29SR-7 asserts RESET for a minimum of 240ms after VCC rises above the threshold. This timeout is generated by an internal timer and is guaranteed across temperature and voltage-no external capacitor or resistor is needed to set or adjust this duration.
APX809S05-29SR-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:
- 2.93V
- 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
APX809S05-29SR-7 FAQ
1.How can I place an order for APX809S05-29SR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX809S05-29SR-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 APX809S05-29SR-7 reliable?
The price and inventory of APX809S05-29SR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX809S05-29SR-7 is usually 5 days.
3.What payment methods are accepted for APX809S05-29SR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX809S05-29SR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX809S05-29SR-7?
APX809S05-29SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX809S05-29SR-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 APX809S05-29SR-7?
For technical support, including APX809S05-29SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX809S05-29SR-7 requirements.
6.How does Aetrix verify that APX809S05-29SR-7 is sourced from the original manufacturer or authorized distributors?
All APX809S05-29SR-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 APX809S05-29SR-7 meets industry standards.
7.What is the process for return or replacement of APX809S05-29SR-7?
All APX809S05-29SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX809S05-29SR-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 APX809S05-29SR-7 part is unused and in its original packaging.
Return procedure for APX809S05-29SR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX809S05-29SR-7 Tags
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MIC826SYMT-TR
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