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Diodes Incorporated APX810-29SRG-7
- Part No.:
- APX810-29SRG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX810-29SRG-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23R
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
APX810-29SRG-7 from Diodes Incorporated is a 3-pin SOT23 microprocessor supervisory circuit with active-high push-pull RESET output, precision 2.93 V reset threshold (±0.07 V over −40°C to +85°C), 200 ms typical reset timeout, 30 µA supply current, and guaranteed reset validity down to VCC = 1 V. It monitors 3.0 V/3.3 V digital power rails in embedded controllers and portable systems.
For engineers reviewing the APX810-29SRG-7 datasheet, APX810-29SRG-7 pinout, APX810-29SRG-7 application, or APX810-29SRG-7 equivalent, this page delivers verified electrical parameters, SOT23 terminal mapping, real-world use cases in battery-powered instrumentation and µP power sequencing, and validated drop-in alternatives for supply voltage monitoring.
Technical Context
The APX810-29SRG-7 implements a precision bandgap-based voltage comparator with internal 2.93 V reference and 30 ppm/°C tempco, coupled to a monostable delay circuit that asserts RESET for ≥240 ms after VCC rises above threshold. Its push-pull driver eliminates external pull-up resistors.
It operates across 1.1 V to 5.5 V supply range, guarantees correct logic state at VCC ≥ 1 V, rejects fast transients on VCC, and requires no external components - enabling compact, low-power reset supervision in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V (typ), 2.86–3.00 V (min–max over −40°C to +85°C); ensures reliable reset assertion before 3.0 V/3.3 V system brownout. |
| Reset Timeout | 200 ms (typ), 140–280 ms (min–max); provides sufficient hold time for µP initialization and clock stabilization. |
| Supply Current | 30 µA (typ) at +25°C; enables multi-year operation in coin-cell–powered devices without compromising reset accuracy. |
| VCC Operating Range | 1.1 V to 5.5 V; supports supervision of 1.8 V, 2.5 V, 3.0 V, 3.3 V, and 5 V rails with single BOM item. |
| Output Type | Push-pull active-high RESET; drives CMOS inputs directly without pull-up resistor, reducing component count and board area. |
| Reset Validity | Guaranteed logic high/low state for VCC ≥ 1 V; ensures deterministic behavior during deep brownout recovery. |
Pinout & Package
SOT23-3 (SR package) surface-mount package with 2.4 mm × 1.3 mm footprint, 0.95 mm height, and JEDEC-standard pad layout optimized for thermal performance (θJA = 201°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VCC) | Supply Input | Connects to monitored power rail; powers internal comparator and driver; valid from 1.1 V to 5.5 V. |
| 2 (GND) | Ground Reference | System ground return path; establishes reference for threshold detection and output logic levels. |
| 3 (RESET) | Active-High Reset Output | Push-pull output asserted high when VCC ≥ 2.93 V; sinks 3.2 mA / sources 800 µA; no external pull-up required. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.93 V threshold | ±0.07 V tolerance over full temperature range ensures consistent brownout detection across operating environments. |
| 200 ms reset timeout | Monostable delay meets µP power-on reset timing requirements without external RC network. |
| 30 µA supply current | Enables integration into always-on, ultra-low-power subsystems such as RTC backup domains or sensor wake logic. |
| Push-pull active-high output | Eliminates need for external pull-up resistor, reducing BOM cost and PCB routing complexity. |
| Valid operation down to VCC = 1 V | Ensures predictable reset state during slow power ramp-up or deep undervoltage conditions. |
Applications
| Industrial Controllers | Portable Medical Instruments |
|---|---|
|
Use Scenario: PLC I/O modules powered by 3.3 V DC-DC converters subject to load transients and thermal drift. IC Role / Device Role / Timing Role: Monitors 3.3 V rail and asserts active-high RESET to ARM Cortex-M4 microcontroller during brownout events. Use Value: Prevents firmware corruption by holding µP in reset until rail stabilizes above 2.93 V for ≥240 ms. |
Use Scenario: Handheld glucose meters using CR2032 coin cell with declining voltage over battery life. IC Role / Device Role / Timing Role: Supervises 3.0 V LDO output feeding ADC and BLE SoC; triggers reset before analog measurement error exceeds 1%. Use Value: Maintains clinical accuracy by ensuring µC only executes calibration routines when supply is within ±2% of nominal. |
| Smart Energy Meters | Automotive Body Control Modules |
|
Use Scenario: DIN-rail mounted meter with 5 V auxiliary supply derived from mains rectifier, exposed to line sags. IC Role / Device Role / Timing Role: Resets metering SoC (e.g., TI MSP430) upon 5 V rail dip below 4.0 V; uses APX810-40 variant but same architecture. Use Value: Guarantees EEPROM write integrity by disabling flash programming during undervoltage conditions. |
Use Scenario: Door module powered by vehicle battery (9–16 V) regulated to 3.3 V, experiencing cold-crank dips to 6 V. IC Role / Device Role / Timing Role: Supervises 3.3 V domain feeding LIN transceiver and window motor drivers; asserts RESET during cranking-induced brownout. Use Value: Avoids spurious LIN bus errors by synchronizing peripheral enable with stable 3.3 V rail recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2T1G | 2.93 V threshold, 240 ms min timeout, open-drain active-low output, 1.2 µA quiescent current | Requires external pull-up; lower IQ suits energy-harvesting systems; not pin-compatible due to active-low output | Select when ultra-low IQ is critical and system design accommodates active-low reset polarity. |
| TPS3808G33DBVR | 3.08 V threshold, 200 ms timeout, push-pull active-high output, 12 µA IQ, adjustable delay option | Higher threshold margin for 3.3 V rails; tighter 0.5% threshold accuracy; same SOT23-3 footprint but different pinout (VCC/GND/RESET vs. GND/VCC/RESET) | Choose for higher precision and extended temperature range (−40°C to +125°C) where layout allows re-routing. |
Compared with MAX809TRD2T1G and TPS3808G33DBVR, the APX810-29SRG-7 offers optimal balance of cost, SOT23-3 compatibility, and guaranteed 2.93 V threshold stability across industrial temperature range - making it ideal for volume production of 3.0 V/3.3 V embedded systems where pin-for-pin replacement is required.
Availability
APX810-29SRG-7 is available at Aetrix Electronics and suitable for industrial controllers, portable medical instruments, and smart energy meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for APX810-29SRG-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 ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The APX809/810 series was designed specifically for cost-sensitive, space-constrained microprocessor reset supervision - delivering precision voltage monitoring, fixed timeout, and push-pull outputs in minimal SOT23-3 footprint.
FAQ
What is the exact reset threshold voltage for APX810-29SRG-7, and how does it vary with temperature?
The APX810-29SRG-7 has a nominal reset threshold of 2.93 V, with guaranteed minimum of 2.86 V and maximum of 3.00 V across −40°C to +85°C ambient temperature. Its temperature coefficient is 30 ppm/°C, resulting in ≤12 mV total drift over the full range - sufficient for stable 3.0 V/3.3 V rail supervision without recalibration.
Can APX810-29SRG-7 drive a 10 kΩ pull-down load directly on its RESET pin?
No - the APX810-29SRG-7 features a push-pull output designed to source up to 800 µA and sink up to 3.2 mA. A 10 kΩ pull-down would draw 330 µA at 3.3 V, exceeding the specified 150 µA sourcing capability under VCC > VTH + 0.2 V. Use only CMOS-compatible loads or buffer stages.
Is APX810-29SRG-7 compatible with 1.8 V microcontrollers?
Yes - the device operates with VCC as low as 1.1 V and guarantees correct RESET logic state down to VCC = 1 V. When monitoring a 1.8 V rail, it asserts RESET high once VCC exceeds 2.93 V, so it is not suitable for direct 1.8 V supervision. For 1.8 V systems, use APX810-23 (2.25 V threshold) instead.
Does APX810-29SRG-7 require an input capacitor on VCC?
No external capacitor is required. The APX810-29SRG-7 integrates all necessary filtering and timing functions internally. A 100 nF bypass capacitor is recommended per standard practice for noise suppression, but the datasheet explicitly states "NOT RECOMMENDED FOR NEW DESIGN" for circuits using external CIN - confirming full self-containment.
APX810-29SRG-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:
- 2.93V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT23R
APX810-29SRG-7 FAQ
1.How can I place an order for APX810-29SRG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX810-29SRG-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 APX810-29SRG-7 reliable?
The price and inventory of APX810-29SRG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX810-29SRG-7 is usually 5 days.
3.What payment methods are accepted for APX810-29SRG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX810-29SRG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX810-29SRG-7?
APX810-29SRG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX810-29SRG-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 APX810-29SRG-7?
For technical support, including APX810-29SRG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX810-29SRG-7 requirements.
6.How does Aetrix verify that APX810-29SRG-7 is sourced from the original manufacturer or authorized distributors?
All APX810-29SRG-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 APX810-29SRG-7 meets industry standards.
7.What is the process for return or replacement of APX810-29SRG-7?
All APX810-29SRG-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX810-29SRG-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 APX810-29SRG-7 part is unused and in its original packaging.
Return procedure for APX810-29SRG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX810-29SRG-7 Tags
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