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Diodes Incorporated APX809-29SAG-7
- Part No.:
- APX809-29SAG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX809-29SAG-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,589
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Product details
Overview
APX809-29SAG-7 from Diodes Incorporated is a 3-pin microprocessor reset supervisor IC with active-low push-pull RESET output, precision 2.93V reset threshold (±0.07V over -40°C to +85°C), 200ms typical reset timeout, 30µA supply current, and guaranteed reset validity down to VCC = 1V. It monitors 3.0V/3.3V digital power rails in embedded controllers and portable µP systems.
For engineers reviewing the APX809-29SAG-7 datasheet, APX809-29SAG-7 pinout, APX809-29SAG-7 application, or APX809-29SAG-7 equivalent, key selection criteria include reset threshold accuracy, low-VCC reset assertion guarantee, push-pull drive strength, SOT23 footprint compatibility, and RoHS-compliant green packaging.
Technical Context
The APX809-29SAG-7 integrates a precision voltage comparator with temperature-compensated reference (30 ppm/°C), internal delay timer, and push-pull output stage. Its reset assertion logic responds to VCC falling below 2.93V and holds RESET low for ≥240ms after VCC rises above threshold.
It operates across 1.1V–5.5V supply range and maintains valid logic state at VCC ≥1V; below 1V, RESET enters high-impedance state. The device ignores fast VCC transients and requires no external components for basic operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±0.07V (min/max over -40°C to +85°C); ensures reliable reset activation before 3.0V/3.3V rail collapse |
| Reset Timeout | 200ms typical (140–280ms min/max); provides sufficient hold time for µP initialization sequences |
| Supply Current | 30µA typical at +25°C; enables battery-powered operation with minimal quiescent drain |
| VCC Validity Range | Reset asserted valid down to VCC = 1V; guarantees deterministic behavior during brownout recovery |
| Output Type | Push-pull active-low RESET; eliminates need for external pull-up resistor and supports direct µP reset input drive |
| Package | SOT23-3 (SA code); 2.9mm × 1.3mm footprint compatible with high-density PCB layouts |
| RoHS Status | Fully lead-free, halogen-free, antimony-free "Green" compound; compliant with EU RoHS 2 (2011/65/EU) |
Pinout & Package
SOT23-3 (SA package) surface-mount package with 1.3mm pitch, 2.9mm × 1.3mm body, and 0.95mm max height. Thermal resistance θJA = 201°C/W on FR-4 with 2oz copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VCC) | Power supply input | Accepts 1.1V–5.5V; powers internal comparator and timer; must be decoupled locally |
| 2 (GND) | Ground reference | Return path for internal circuitry and RESET output; requires low-impedance connection to system ground plane |
| 3 (RESET) | Active-low reset output | Push-pull driver asserts logic low during reset; sinks up to 3.2mA at 0.4V; no external pull-up needed |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 2.93V with ±0.07V tolerance over full temperature range - eliminates uncertainty zone near nominal 3.0V rail |
| No external components required | Self-contained supervision - reduces BOM count, PCB area, and design validation effort for basic reset functionality |
| Guaranteed reset validity to 1V VCC | Ensures deterministic µP reset state during deep brownout recovery without external biasing networks |
| Low 30µA supply current | Extends battery life in portable instrumentation and handheld controllers without compromising reset reliability |
| SOT23-3 green package | Halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb) meets strict environmental compliance requirements |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
|
Use Scenario: Power sequencing and brownout detection in DIN-rail mounted programmable logic controllers operating from 3.3V SMPS rails. IC Role / Device Role / Timing Role: Supervisory reset generator asserting active-low signal to ARM Cortex-M7 MCU during VCC dip below 2.93V. Use Value: Prevents corrupted firmware execution during factory floor voltage sags; 200ms timeout ensures full register initialization before code fetch. |
Use Scenario: Battery-backed vital sign monitor with dual 3.0V LDO outputs powering ADC and display controller. IC Role / Device Role / Timing Role: Single-point reset supervisor monitoring main 3.0V rail and asserting RESET to MSP430F5xx MCU. Use Value: 30µA quiescent current extends single-CR2032 battery life beyond 12 months; 1V VCC validity prevents spurious wakeups during deep discharge. |
| Automotive Body Control Modules | Smart Energy Meters |
|
Use Scenario: Reset management in non-safety-critical BCM subassemblies powered from 3.3V domain of automotive PMIC. IC Role / Device Role / Timing Role: Voltage monitor interfacing directly with Infineon AURIX TC234L reset pin via push-pull output. Use Value: Push-pull drive eliminates external pull-up, reducing component count and improving noise immunity in EMI-prone vehicle harness environments. |
Use Scenario: Tamper-resistant electricity meter with isolated 3.3V microcontroller domain powered from flyback converter. IC Role / Device Role / Timing Role: Primary reset source ensuring secure boot sequence integrity after AC line interruption or surge events. Use Value: 2.93V threshold aligns with 3.0V LDO dropout margin; 30ppm/°C tempco maintains accuracy across -25°C to +70°C meter enclosure temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2T | 2.93V threshold, 240ms min timeout, open-drain output requiring external pull-up | Lacks push-pull drive; adds BOM item and increases layout sensitivity to noise | Choose only if legacy MAXIM footprint reuse is mandatory and pull-up resistor placement is controlled |
| TPS3808G12DBVR | 1.2V adjustable threshold via external resistor divider; 200ms fixed timeout; 1.8µA IQ | Requires two external resistors; lower IQ but higher design complexity and calibration dependency | Select when precise threshold tuning or ultra-low-power sleep modes dominate over simplicity and cost |
Compared with MAX809TRD2T and TPS3808G12DBVR, the APX809-29SAG-7 delivers optimal balance of precision, zero-component integration, push-pull robustness, and green compliance - making it preferred for cost-sensitive, high-volume 3.0V/3.3V embedded systems where layout simplicity and supply-chain consistency are critical.
Availability
APX809-29SAG-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, and smart energy meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for APX809-29SAG-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, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and Malaysia.
The APX809/810 series was designed specifically for cost-effective, high-reliability power-supply monitoring in space-constrained µP-based systems - emphasizing precision threshold stability, minimal external dependencies, and green packaging compliance.
FAQ
What is the minimum VCC voltage at which APX809-29SAG-7 guarantees valid RESET assertion?
The APX809-29SAG-7 guarantees correct logic state (RESET low) for VCC ≥1V. Below 1V, the output enters high-impedance mode and no longer actively drives low; this is intentional to avoid contention during deep undervoltage conditions where downstream logic is nonfunctional.
Does APX809-29SAG-7 require an external capacitor for reset timing?
No. The 200ms reset timeout is generated by an internal precision timer; no external capacitor or resistor is needed. This eliminates timing drift due to component tolerance and temperature variation while reducing bill-of-materials count and PCB area.
Can APX809-29SAG-7 be used with a 5V supply rail?
Yes. It operates across 1.1V–5.5V VCC range and maintains specified reset threshold accuracy and timing performance at 5V. However, its 2.93V threshold is optimized for 3.0V/3.3V systems; for 5V rails, consider APX809-40SAG-7 (4.00V threshold) instead.
Is APX809-29SAG-7 pin-compatible with other SOT23 reset supervisors?
Pinout matches standard SOT23-3 configuration (VCC–GND–RESET), but functional compatibility depends on output polarity and threshold. APX809-29SAG-7 is not pin-compatible with active-high devices like APX810-29SAG-7 or open-drain variants such as MAX809, due to differing drive architecture and logic polarity.
APX809-29SAG-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 Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX809-29SAG-7 FAQ
1.How can I place an order for APX809-29SAG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX809-29SAG-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 APX809-29SAG-7 reliable?
The price and inventory of APX809-29SAG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX809-29SAG-7 is usually 5 days.
3.What payment methods are accepted for APX809-29SAG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX809-29SAG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX809-29SAG-7?
APX809-29SAG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX809-29SAG-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 APX809-29SAG-7?
For technical support, including APX809-29SAG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX809-29SAG-7 requirements.
6.How does Aetrix verify that APX809-29SAG-7 is sourced from the original manufacturer or authorized distributors?
All APX809-29SAG-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 APX809-29SAG-7 meets industry standards.
7.What is the process for return or replacement of APX809-29SAG-7?
All APX809-29SAG-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX809-29SAG-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 APX809-29SAG-7 part is unused and in its original packaging.
Return procedure for APX809-29SAG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX809-29SAG-7 Tags
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