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Diodes Incorporated APX809S05-29SA-7
- Part No.:
- APX809S05-29SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX809S05-29SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:47,977
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Product details
Overview
APX809S05-29SA-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 drops 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 package. It is used in portable battery-powered microcontroller systems requiring reliable power-on reset.
For engineers reviewing the APX809S05-29SA-7 datasheet, APX809S05-29SA-7 pinout, APX809S05-29SA-7 application, or APX809S05-29SA-7 equivalent, key selection criteria include reset threshold accuracy (2.93V ±0.04V), guaranteed reset validity at VCC ≥1.0V, 240ms minimum timeout, push-pull output drive capability, and SOT23-3 thermal performance (θJA = 232°C/W).
Technical Context
The APX809S05-29SA-7 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 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 exceeds the 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) and sourcing 500µA at VOH ≥0.8VCC (VCC > VTH + 0.2V), with guaranteed logic-state validity across VCC = 1.0V to 5.5V and operating ambient range of −40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±0.04V at +25°C; enables precise 3.0V rail supervision with margin for droop |
| Reset Timeout | ≥240ms after VCC rise; ensures full µP initialization before release |
| Supply Current | 7µA typical; supports multi-year battery life in always-on portable devices |
| VCC Operating Range | 1.0V to 5.5V; guarantees valid reset state even during brownout or deep discharge |
| Output Type | Active-low push-pull; eliminates need for external pull-up resistor and reduces BOM count |
| Temperature Coefficient | ±30ppm/°C; maintains threshold stability over industrial temperature range (−40°C to +125°C) |
| Output Drive | Sinks 1.2mA @ VOL ≤0.3V; directly interfaces with standard CMOS reset inputs without level-shifting |
Pinout & Package
APX809S05-29SA-7 is packaged in a lead-free, halogen-free SOT23-3 (SA) surface-mount package with 232°C/W junction-to-ambient thermal resistance and standard 0.95mm pitch.
| 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 digital output asserted LOW during undervoltage; drives µP /RESET input directly |
| 3 (VCC) | Supply Input | Monitored power rail input; also powers internal circuitry; requires local 100nF decoupling per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.93V threshold | Enables accurate supervision of 3.0V logic rails with 70mV headroom for transient rejection |
| 240ms minimum reset pulse | Guarantees sufficient time for flash memory initialization and PLL lock in embedded µCs |
| 7µA supply current | Reduces quiescent power by >90% vs. discrete RC-reset solutions in battery-critical designs |
| Valid reset down to VCC = 1.0V | Supports graceful shutdown sequencing in multi-rail systems with staggered power-down |
| No external components required | Eliminates BOM cost, layout area, and calibration effort associated with resistor-divider supervisors |
Applications
| Battery-Powered IoT Sensor Node | Industrial PLC I/O Module |
|---|---|
Use Scenario: A wireless environmental sensor node powered by a single Li-ion cell (2.7–4.2V) with deep-sleep mode and wake-on-event operation. IC Role / Device Role / Timing Role: Voltage detector providing power-on reset and brownout detection to prevent firmware corruption during cell voltage sag. Use Value: 7µA quiescent current extends battery life beyond 5 years; 240ms reset pulse ensures reliable bootloader execution after wake-up. | Use Scenario: Modular I/O expansion unit in an industrial control cabinet with 3.3V FPGA and isolated CAN transceivers. IC Role / Device Role / Timing Role: Supervisory IC asserting reset to FPGA and microcontroller during 3.3V rail instability caused by load switching transients. Use Value: 2.93V threshold matches 3.3V rail tolerance; push-pull output avoids weak-pull issues in noisy factory environments. |
| Medical Handheld Diagnostic Device | Automotive Body Control Module (BCM) Subsystem |
Use Scenario: Portable ultrasound probe with ARM Cortex-M4 MCU, analog front-end, and rechargeable battery pack. IC Role / Device Role / Timing Role: Monitors main 3.0V analog supply and triggers hardware reset if voltage dips below safe ADC reference level. Use Value: Guaranteed reset validity down to VCC = 1.0V allows safe shutdown during battery depletion; SOT23-3 footprint saves space on dense PCB. | Use Scenario: Low-voltage subsystem (e.g., interior lighting controller) powered from vehicle's 3.0V LDO rail derived from 12V battery. IC Role / Device Role / Timing Role: Detects undervoltage events during cold-cranking or alternator failure and holds microcontroller in reset until stable 3.0V is restored. Use Value: ±30ppm/°C tempco ensures threshold stability across −40°C to +125°C under-hood conditions; RoHS/Green compliance meets automotive material requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809K33DBZR | 3.3V threshold, 200ms reset timeout, 1.6µA supply current, same SOT23-3 package | Higher threshold unsuitable for 3.0V rail supervision; better for 3.3V-only systems | Select only if 3.3V rail monitoring is required and tighter current budget (<2µA) is critical |
| MAX809SEUR+T | 2.93V threshold, 240ms timeout, 15µA supply current, SOT23-3, no guaranteed reset below 1.2V | Lacks VCC = 1.0V reset validity; higher ICC increases battery drain in ultra-low-power use cases | Acceptable where extended brownout operation is not needed and 15µA ICC is acceptable |
Compared with TLV809K33DBZR and MAX809SEUR+T, APX809S05-29SA-7 uniquely combines 2.93V precision, 240ms timeout, 7µA ICC, and guaranteed reset down to 1.0V - making it optimal for 3.0V battery-powered systems requiring robust brownout resilience and minimal quiescent power.
Availability
APX809S05-29SA-7 is available at Aetrix Electronics and suitable for battery-powered IoT nodes, industrial PLC modules, medical handheld diagnostics, and automotive BCM subsystems requiring stable component supply and long-term manufacturability.
Supply support for APX809S05-29SA-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 cost-sensitive, space-constrained applications requiring precision voltage monitoring and guaranteed reset behavior across wide temperature and supply ranges.
FAQ
What is the exact reset threshold voltage and tolerance for APX809S05-29SA-7?
The APX809S05-29SA-7 has a nominal reset threshold of 2.93V with a tolerance of ±0.04V at +25°C, and a temperature coefficient of ±30ppm/°C across −40°C to +125°C. This is confirmed in the Electrical Characteristics table of DS39140 Rev. 2–2, page 4, under VTH for -29 suffix parts.
Does APX809S05-29SA-7 require an external capacitor for reset timing?
No. The APX809S05-29SA-7 uses an internal timer to generate a minimum 240ms reset pulse after VCC rises above the threshold; no external capacitor or resistor is needed. This is explicitly stated in the Description section (page 1) and confirmed in the Timing Diagram (page 6) of DS39140.
Can APX809S05-29SA-7 operate reliably at VCC = 1.2V?
Yes. The device guarantees correct RESET logic state down to VCC = 1.0V, as specified in both the Recommended Operating Conditions (page 3) and Electrical Characteristics (page 4, "Guaranteed Reset Valid to VCC = +1V") sections of DS39140.
Is the SOT23-3 package of APX809S05-29SA-7 RoHS and halogen-free compliant?
Yes. The part uses Diodes Incorporated's "Green" molding compound with no bromine, antimony, or added lead, meeting EU RoHS 2015/863/EU and halogen-free definitions (<900ppm Br, <900ppm Cl, <1000ppm Sb). This is documented in the Features section (page 1) and Notes 1–3 (page 2) of DS39140.
APX809S05-29SA-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
APX809S05-29SA-7 FAQ
1.How can I place an order for APX809S05-29SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX809S05-29SA-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 APX809S05-29SA-7 reliable?
The price and inventory of APX809S05-29SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX809S05-29SA-7 is usually 5 days.
3.What payment methods are accepted for APX809S05-29SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX809S05-29SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX809S05-29SA-7?
APX809S05-29SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX809S05-29SA-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 APX809S05-29SA-7?
For technical support, including APX809S05-29SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX809S05-29SA-7 requirements.
6.How does Aetrix verify that APX809S05-29SA-7 is sourced from the original manufacturer or authorized distributors?
All APX809S05-29SA-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 APX809S05-29SA-7 meets industry standards.
7.What is the process for return or replacement of APX809S05-29SA-7?
All APX809S05-29SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX809S05-29SA-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 APX809S05-29SA-7 part is unused and in its original packaging.
Return procedure for APX809S05-29SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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