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Diodes Incorporated APX809S00-29SA-7
- Part No.:
- APX809S00-29SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX809S00-29SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:6,035
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Product details
Overview
APX809S00-29SA-7 from Diodes Incorporated is a 3-pin SOT23 micro-power voltage detector IC designed for µP supervisory functions in embedded digital systems. It provides active-low reset assertion when VCC falls below 2.93 V (typ.), maintains reset for ≥240 ms after VCC recovery, and operates reliably down to VCC = 1.0 V with only 7 µA supply current (typ.). Used in battery-powered controllers and portable instrumentation requiring precise +2.9 V supply monitoring.
For engineers reviewing the APX809S00-29SA-7 datasheet, APX809S00-29SA-7 pinout, APX809S00-29SA-7 application, or APX809S00-29SA-7 equivalent, key selection criteria include reset threshold accuracy (±0.04 V), guaranteed operation at 1 V VCC, push-pull output drive capability (1.2 mA sink), temperature-stable threshold (30 ppm/°C), and SOT23-3 footprint compatibility.
Technical Context
The APX809S00-29SA-7 integrates a precision bandgap reference, comparator, and push-pull output stage in a single die. Its reset threshold is trimmed to 2.93 V (typ.) with ±0.04 V tolerance over -40°C to +125°C, and features 30 ppm/°C temperature coefficient for stable trip point across operating range.
It asserts RESET low when VCC drops below VTH, holds reset active for ≥240 ms after VCC exceeds 1.02×VTH, and guarantees correct logic state down to VCC = 1.0 V - enabling reliable brown-out detection in low-voltage microcontroller systems without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V (typ.), ±0.04 V tolerance - ensures accurate +2.9 V supply monitoring for 3.3 V systems with margin. |
| Supply Current | 7 µA (typ.) - enables multi-year battery life in portable equipment without compromising reset timing. |
| Reset Timeout | 240 ms (min.) - satisfies µP power-on reset timing requirements per Intel/ARM specifications. |
| VCC Operating Range | 1.0 V to 5.5 V - supports valid reset assertion during deep brown-out and full-system wake-up sequencing. |
| Output Type | Push-pull active-low - eliminates need for external pull-up resistor, reduces BOM count and board space. |
| Temperature Coefficient | 30 ppm/°C - maintains ≤0.3% threshold drift over full -40°C to +125°C industrial range. |
| Reset Propagation Delay | 20 µs (max.) - responds rapidly to supply transients while ignoring sub-20 µs noise spikes on VCC. |
Pinout & Package
APX809S00-29SA-7 is housed in a RoHS-compliant, halogen-free SOT23-3 package (JEDEC TO-236AB) with 1.3 mm × 2.9 mm footprint and 0.95 mm height. Pin 1 = GND, Pin 2 = RESET (active-low output), Pin 3 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground return path for internal comparator and output stage; must be low-impedance connection. |
| 2 | RESET | Active-low push-pull output; drives low during reset condition, high-impedance otherwise; sinks up to 1.2 mA. |
| 3 | VCC | Power input pin; supplies internal circuitry and defines reset threshold reference; accepts 1.0–5.5 V. |
Key Features
| Feature | Design Value |
|---|---|
| Precision threshold trimming | 2.93 V ±0.04 V at 25°C - eliminates manual calibration and external resistor networks. |
| Low-VCC reset validity | Guaranteed RESET assertion down to VCC = 1.0 V - ensures fail-safe behavior during deep undervoltage events. |
| No external components required | Self-contained supervision - no capacitors, resistors, or biasing needed for basic reset functionality. |
| Thermal stability | 30 ppm/°C threshold drift - maintains timing integrity across automotive and industrial ambient ranges. |
| Green packaging | SOT23 with Br/Sb-free molding compound - meets RoHS 3 (2015/863/EU) and Diodes' "Green" definition. |
Applications
| Industrial Controller Monitoring | Portable Medical Instrumentation |
|---|---|
|
Use Scenario: Supervising 3.3 V power rail in PLC I/O modules exposed to wide ambient temperature swings (-40°C to +85°C). IC Role / Device Role / Timing Role: Voltage detector providing power-on reset and brown-out protection for ARM Cortex-M4 MCU. Use Value: 240 ms minimum reset pulse width ensures complete initialization of flash memory and peripherals before firmware execution. |
Use Scenario: Power supply monitoring in handheld glucose meters powered by single-cell Li-ion batteries (2.8–4.2 V range). IC Role / Device Role / Timing Role: Active-low reset generator asserting during battery voltage sag below 2.9 V to prevent data corruption. Use Value: 7 µA typical supply current extends battery runtime beyond 2 years in sleep-mode-dominated operation. |
| Smart Energy Metering | Automotive Body Control Module |
|
Use Scenario: Monitoring auxiliary 3.3 V rail in DIN-rail mounted electricity meters with extended lifetime requirements. IC Role / Device Role / Timing Role: Supervisory IC ensuring deterministic reset of metrology SoC during AC line interruptions. Use Value: Valid operation down to 1.0 V VCC allows continued reset assertion even during capacitor discharge decay phase. |
Use Scenario: Reset supervision for infotainment microcontroller in 12 V vehicle systems with load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Brown-out detector triggering safe shutdown before VCC drops below MCU operational minimum. Use Value: 20 µs max propagation delay enables response to fast transients while rejecting EMI-induced false triggers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2T | 2.93 V threshold, 140 ms min reset timeout, 1.6 µA supply current, open-drain output | Requires external pull-up resistor; lower quiescent current but longer timeout may violate µP startup timing | Prefer when ultra-low power dominates over reset timing precision |
| TPS3808G33DBVR | 3.08 V threshold, adjustable timeout (1.25 ms to 10 s), 8 µA supply current, push-pull output | Higher threshold and programmable delay increase design flexibility but require additional configuration pins | Prefer when system requires configurable reset duration or tighter VTH tolerance (±0.5%) |
Compared with MAX809TRD2T and TPS3808G33DBVR, APX809S00-29SA-7 delivers fixed 240 ms reset hold time and guaranteed 1 V operation - making it optimal for cost-sensitive, space-constrained designs where deterministic timing and deep brown-out coverage are critical.
Availability
APX809S00-29SA-7 is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, smart energy meters, and automotive body electronics requiring stable component supply and long-term lifecycle support.
Supply support for APX809S00-29SA-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 power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The APX809S/810S series belongs to Diodes' µP supervisory product line, engineered specifically for low-cost, low-power reset generation in resource-constrained embedded systems without external passive components.
FAQ
What is the exact reset threshold voltage for APX809S00-29SA-7?
The APX809S00-29SA-7 has a nominal reset threshold of 2.93 V at +25°C, with a guaranteed range of 2.89 V to 2.97 V across temperature and process variation. This value is laser-trimmed during production and specified in the DS39140 datasheet Table 1 under VTH for -29 suffix parts.
Does APX809S00-29SA-7 require an external pull-up resistor on the RESET pin?
No. APX809S00-29SA-7 features a push-pull output stage that actively drives RESET low during fault conditions and high during normal operation - eliminating the need for an external pull-up resistor and reducing PCB component count.
Can APX809S00-29SA-7 operate with a 1.8 V supply?
Yes. The device guarantees correct reset assertion and logic state down to VCC = 1.0 V, so it remains fully functional at 1.8 V. However, its 2.93 V threshold means it will assert reset continuously at 1.8 V - intended for monitoring higher rails like 3.3 V, not for direct 1.8 V supervision.
What is the maximum sink current capability of the RESET output?
The RESET pin can sink up to 1.2 mA while maintaining VOL ≤ 0.3 V at VCC = VTH − 0.2 V, and up to 3.2 mA while holding VOL ≤ 0.4 V under the same condition. These values are measured per DS39140 Electrical Characteristics Table, ensuring robust interfacing with standard CMOS inputs.
APX809S00-29SA-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:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX809S00-29SA-7 FAQ
1.How can I place an order for APX809S00-29SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX809S00-29SA-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 APX809S00-29SA-7 reliable?
The price and inventory of APX809S00-29SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX809S00-29SA-7 is usually 5 days.
3.What payment methods are accepted for APX809S00-29SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX809S00-29SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX809S00-29SA-7?
APX809S00-29SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX809S00-29SA-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 APX809S00-29SA-7?
For technical support, including APX809S00-29SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX809S00-29SA-7 requirements.
6.How does Aetrix verify that APX809S00-29SA-7 is sourced from the original manufacturer or authorized distributors?
All APX809S00-29SA-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 APX809S00-29SA-7 meets industry standards.
7.What is the process for return or replacement of APX809S00-29SA-7?
All APX809S00-29SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX809S00-29SA-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 APX809S00-29SA-7 part is unused and in its original packaging.
Return procedure for APX809S00-29SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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