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Diodes Incorporated APX810S-29SR-7
- Part No.:
- APX810S-29SR-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX810S-29SR-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,980
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Product details
Overview
APX810S-29SR-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory functions in 2.93V ±0.04V supply monitoring applications. It provides active-high push-pull RESET output, guarantees valid reset assertion down to VCC = 1.0V, delivers 240ms minimum reset timeout, and draws only 7µA typical supply current. Used in portable battery-powered systems requiring reliable power-on reset and brownout detection.
For engineers reviewing the APX810S-29SR-7 datasheet, APX810S-29SR-7 pinout, APX810S-29SR-7 application, or APX810S-29SR-7 equivalent, key selection criteria include reset threshold accuracy (±1.5% at +25°C), guaranteed operation over –40°C to +125°C, SOT23-SR package compatibility, and push-pull drive capability without external pull-up.
Technical Context
The APX810S-29SR-7 integrates a precision bandgap reference, comparator with hysteresis, and push-pull output stage optimized for single-supply monitoring. Its reset threshold is trimmed to 2.93V (typ.) with ±0.04V tolerance across temperature, and internal timing circuitry ensures ≥240ms reset pulse width after VCC exceeds threshold.
Designed for direct integration into µP power rails, it operates from 1.0V to 5.5V supply, maintains correct logic state down to VCC = 1.0V, and rejects fast transients via built-in noise immunity-no external RC components required for basic supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V (typ.), 2.89–2.97V range at +25°C - enables precise 2.9V system rail monitoring |
| Reset Timeout | 240ms (min) - ensures sufficient hold time for µP initialization after power-up |
| Supply Current | 7µA (typ.) - supports ultra-low-power battery operation for >10-year shelf life |
| Output Type | Active-high push-pull - eliminates need for external pull-up resistor, drives loads directly |
| VCC Operating Range | 1.0V to 5.5V - guarantees reset validity even during deep brownout or low-battery conditions |
| Temperature Range | –40°C to +125°C - qualified for industrial and automotive under-hood environments |
| Reset Propagation Delay | 20µs max (VCC drop from VTH to VTH–100mV) - responds rapidly to supply collapse |
Pinout & Package
APX810S-29SR-7 is housed in a RoHS-compliant, halogen-free SOT23-3 (SR) package with 1.3mm × 2.9mm footprint and 0.95mm height. Pin 1 (GND), Pin 2 (RESET), Pin 3 (VCC) follow standard SOT23-SR top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be connected to system ground plane |
| 2 | RESET | Active-high push-pull output; asserts high during reset condition, sinks/source up to 1.2mA |
| 3 | VCC | Power supply input; monitors this rail for threshold violation; powers internal circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.93V threshold | ±0.04V tolerance at +25°C and stable over temperature (30ppm/°C drift) - eliminates calibration in production |
| No external components | Self-contained supervision - no capacitor, resistor, or trim pot required for basic reset functionality |
| Guaranteed reset at 1.0V VCC | Ensures deterministic behavior during deep undervoltage events where many µPs lose internal state |
| Push-pull active-high output | Drives CMOS inputs directly; avoids leakage path of open-drain solutions and reduces BOM count |
| Green packaging | SOT23-SR with <900ppm Br/Cl and <1000ppm Sb - meets IPC-1752A Class 2 environmental compliance |
Applications
| Industrial PLC I/O Module | Battery-Powered IoT Sensor Node |
|---|---|
Use Scenario: Power sequencing and brownout recovery in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-high RESET to ARM Cortex-M7 MCU upon 3.3V rail sag below 2.93V. Use Value: Prevents firmware corruption during AC line dips by holding MCU in reset until stable 3.3V is restored for ≥240ms. |
Use Scenario: Long-life environmental sensor node powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Monitors 3.0V LDO output feeding ultra-low-power microcontroller and BLE radio. Use Value: Enables graceful shutdown and nonvolatile state save when battery drops to 2.93V, extending usable battery life by 12%. |
| Medical Handheld Diagnostic Device | Automotive Body Control Module (BCM) |
Use Scenario: Power integrity assurance in FDA-cleared portable ECG monitor with dual Li-ion backup. IC Role / Device Role / Timing Role: Supervises main 3.3V system rail and triggers hardware reset if voltage falls below 2.93V during transient load switching. Use Value: Meets IEC 62304 Class B software safety requirements by ensuring deterministic restart on power anomaly. |
Use Scenario: Reset coordination in 12V-to-3.3V converted subsystem powering door lock actuators and interior lighting. IC Role / Device Role / Timing Role: Detects undervoltage on 3.3V domain caused by alternator ripple or cold-crank dip. Use Value: Maintains functional safety integrity (ISO 26262 ASIL-B) by preventing erratic actuator control during supply instability. |
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, open-drain active-low output, 14µA ICC (typ.), SOT23-3 | Requires external pull-up; incompatible with active-high logic interface; higher quiescent current | Select only if legacy design uses active-low reset and board layout cannot accommodate push-pull drive |
| TPS3808G33DBVR | 3.3V threshold (not 2.93V), adjustable delay, 1.1µA ICC (typ.), SOT23-6 | Higher threshold unsuitable for 2.9V rail monitoring; extra pins increase PCB area and routing complexity | Prefer only when system requires programmable timeout and 3.3V rail supervision with ultra-low ICC |
Compared with MAX809SEUR+T and TPS3808G33DBVR, APX810S-29SR-7 uniquely combines exact 2.93V threshold, active-high push-pull output, and 7µA supply current in a 3-pin SOT23 - enabling simpler, lower-cost, and more accurate supervision of 2.9V systems without design compromises.
Availability
APX810S-29SR-7 is available at Aetrix Electronics and suitable for industrial PLCs, battery-powered IoT nodes, medical handheld diagnostics, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for APX810S-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, computing, and automotive markets.
The APX809S/810S series belongs to Diodes' µP supervisory product line, engineered specifically for cost-sensitive, space-constrained applications demanding precision voltage monitoring and robust reset generation without external components.
FAQ
What is the exact reset threshold voltage of APX810S-29SR-7 at room temperature?
The APX810S-29SR-7 has a nominal reset threshold of 2.93V at +25°C, with a guaranteed range of 2.89V to 2.97V per the DS39140 datasheet. This value is laser-trimmed during production and remains stable across temperature with a maximum drift of 30ppm/°C.
Can APX810S-29SR-7 operate reliably below 1.8V VCC?
Yes - the device guarantees correct RESET logic state down to VCC = 1.0V, and its internal comparator remains functional throughout the full 1.0V–5.5V operating range. Output voltage levels (VOH/VOL) are specified at VCC ≥ 1.0V, making it suitable for ultra-low-voltage brownout detection.
Is the SOT23-SR package pin-compatible with SOT23-SA?
No - SOT23-SR and SOT23-SA use different pinouts: SR assigns Pin 1 = GND, Pin 2 = RESET, Pin 3 = VCC; SA assigns Pin 1 = RESET, Pin 2 = GND, Pin 3 = VCC. Layouts must be verified against Diodes' package drawings (DS39140 Rev. 2, page 9) to avoid assembly errors.
Does APX810S-29SR-7 require an external bypass capacitor?
A 100nF ceramic capacitor between VCC and GND is recommended per the typical application circuit in DS39140 (page 2), placed within 2mm of the device. While not strictly required for basic function, it suppresses high-frequency noise that could cause false resets during fast transients on the monitored rail.
APX810S-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 High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX810S-29SR-7 FAQ
1.How can I place an order for APX810S-29SR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX810S-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 APX810S-29SR-7 reliable?
The price and inventory of APX810S-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 APX810S-29SR-7 is usually 5 days.
3.What payment methods are accepted for APX810S-29SR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX810S-29SR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX810S-29SR-7?
APX810S-29SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX810S-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 APX810S-29SR-7?
For technical support, including APX810S-29SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX810S-29SR-7 requirements.
6.How does Aetrix verify that APX810S-29SR-7 is sourced from the original manufacturer or authorized distributors?
All APX810S-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 APX810S-29SR-7 meets industry standards.
7.What is the process for return or replacement of APX810S-29SR-7?
All APX810S-29SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX810S-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 APX810S-29SR-7 part is unused and in its original packaging.
Return procedure for APX810S-29SR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX810S-29SR-7 Tags
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