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Diodes Incorporated APX809S00-29SR-7
- Part No.:
- APX809S00-29SR-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX809S00-29SR-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:1,700
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Product details
Overview
APX809S00-29SR-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 (typ), maintains reset for ≥240ms after recovery, and operates down to VCC = 1.0V with only 7µA typical supply current. Used in portable battery-powered systems requiring reliable power-on reset and brownout protection.
For engineers reviewing the APX809S00-29SR-7 datasheet, APX809S00-29SR-7 pinout, APX809S00-29SR-7 application, or APX809S00-29SR-7 equivalent, key selection criteria include reset threshold accuracy (±0.04V over temperature), guaranteed valid output at 1V VCC, 240ms timeout period, and SOT23-3 (SR) package compatibility with space-constrained PCB layouts.
Technical Context
The APX809S00-29SR-7 integrates a precision bandgap reference, comparator, and push-pull output driver in a single die. Its reset threshold is trimmed to 2.93V (typ) with ±0.04V tolerance across -40°C to +125°C, and exhibits 30ppm/°C temperature coefficient. The internal timing circuit ensures minimum 240ms reset pulse width after VCC exceeds VTH.
No external components are required: the device asserts RESET low when VCC falls below VTH, holds it low for ≥240ms after VCC rises above VTH, and guarantees correct logic state for VCC ≥1.0V. Fast transient immunity on VCC is achieved via internal filtering without external capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V (typ), 2.89–2.97V (min/max); enables precise 2.9V supply monitoring for 3.0V/3.3V systems |
| Reset Timeout | 240ms (typ), 140–280ms (min/max); ensures sufficient processor initialization time after power-up |
| Supply Current | 7µA (typ), ≤16µA (max); supports multi-year battery life in always-on portable devices |
| VCC Operating Range | 1.0V to 5.5V; guarantees functional reset assertion even during deep brownout conditions |
| Output Type | Active-low push-pull; drives loads directly without pull-up resistor, reducing BOM count |
| Temperature Range | -40°C to +125°C; qualified for industrial and automotive under-hood environments |
| Reset Propagation Delay | 20µs (max) from VCC drop to RESET assertion; responds rapidly to supply faults |
Pinout & Package
SOT23-3 (SR) package: 2.9mm × 1.3mm × 1.0mm body, gull-wing leads, RoHS-compliant "Green" molding compound (Br/Cl <1500ppm total, Sb <1000ppm).
| 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-low push-pull output; sinks up to 3.2mA at 0.4V, sources minimal leakage when high |
| 3 | VCC | Power supply input; monitors this rail for undervoltage; no bypass capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.93V threshold | ±0.04V tolerance over full temperature range eliminates calibration overhead in production test |
| 240ms guaranteed reset pulse | Meets Intel-compatible power-on reset timing requirements without external RC network |
| 1.0V VCC operation limit | Ensures deterministic reset behavior during battery discharge down to endpoint voltage |
| 7µA supply current | Reduces quiescent power by >90% vs. discrete supervisor solutions using comparators and timers |
| SOT23-3 (SR) footprint | Compatible with standard pick-and-place equipment and reflow profiles; 3000-unit tape-and-reel packaging |
Applications
| Battery-Powered IoT Sensor Node | Industrial PLC I/O Module |
|---|---|
Use Scenario: A wireless environmental sensor node powered by two AA alkaline cells (1.8–3.2V range) requires reliable reset during battery depletion and cold-start. IC Role / Device Role / Timing Role: Voltage detector providing brownout reset signal to ARM Cortex-M0+ MCU upon VCC falling below 2.93V. Use Value: Guarantees clean MCU restart before logic corruption occurs, with 240ms hold time enabling full register initialization. | Use Scenario: An isolated digital input module in a factory automation controller must maintain deterministic behavior during 24VDC supply ripple and transient dips. IC Role / Device Role / Timing Role: Supervisory IC asserting active-low reset to FPGA configuration logic when 3.3V auxiliary rail sags below threshold. Use Value: Prevents partial FPGA configuration lockup by enforcing minimum 240ms reset pulse after supply recovery. |
| Medical Handheld Diagnostic Device | Automotive Body Control Module (BCM) |
Use Scenario: A portable ultrasound probe with lithium-ion battery (2.7–4.2V) needs fail-safe reset during rapid discharge or thermal shutdown. IC Role / Device Role / Timing Role: Power supply monitor triggering hard reset of application processor when battery voltage crosses 2.93V threshold. Use Value: Maintains functional safety integrity by ensuring processor never executes code outside validated voltage window. | Use Scenario: A BCM subassembly powered from vehicle battery (9–16V) with local 3.3V LDO must survive load-dump and cold-crank events. IC Role / Device Role / Timing Role: Supervisor IC monitoring 3.3V rail and asserting reset to microcontroller during brownout caused by alternator dropout. Use Value: Enables robust recovery from 12V system transients without requiring external watchdog or RC timing components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX809S00-29SA-7 | Same electrical specs but SOT23-3 (SA) package; 0.915mm lead pitch vs. SR's 0.975mm | SA variant uses different land pattern; not interchangeable without PCB redesign | Select SA only if legacy board layout or assembly process is optimized for that variant |
| TPS3808G01QDBVRQ1 | 2.93V threshold, but 350ms reset timeout and 1.6µA quiescent current; AEC-Q100 qualified | Designed for automotive use; higher cost and longer timeout may delay system boot | Choose only when AEC-Q100 compliance is mandatory and extended reset hold time is acceptable |
Compared with APX809S00-29SA-7, the SR variant offers identical supervision functionality with mechanical compatibility for alternate SOT23 footprint variants; versus TPS3808G01QDBVRQ1, it trades automotive qualification and ultra-low current for lower cost and tighter timing control in industrial/portable designs.
Availability
APX809S00-29SR-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 APX809S00-29SR-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, serving industrial, computing, communications, and consumer markets with high-reliability, cost-optimized components.
The APX809S/810S series belongs to Diodes' µP supervisory product line, engineered specifically for low-power, high-accuracy voltage monitoring in space- and energy-constrained embedded systems.
FAQ
What is the exact reset threshold voltage for APX809S00-29SR-7?
The APX809S00-29SR-7 has a nominal reset threshold of 2.93V, with guaranteed limits of 2.89V (minimum) and 2.97V (maximum) across -40°C to +125°C ambient temperature. This value is laser-trimmed during production and specified in the DS39140 datasheet Table 1 under VTH for -29 suffix parts.
Does APX809S00-29SR-7 require an external pull-up resistor on the RESET pin?
No. The APX809S00-29SR-7 features a push-pull output stage, meaning the RESET pin actively drives low during reset assertion and actively drives high (to VCC) when inactive. No external pull-up resistor is needed, reducing component count and PCB area.
Can APX809S00-29SR-7 operate reliably at VCC = 1.2V?
Yes. The device guarantees correct RESET logic state for VCC ≥1.0V, including full functionality at 1.2V. At this voltage, the output remains valid, supply current drops to ~3µA, and reset assertion timing remains within specification - critical for end-of-battery-life operation.
What is the difference between SOT23 (SA) and SOT23 (SR) packages for this part?
SOT23 (SA) and SOT23 (SR) are mechanically distinct Diodes-branded variants of the SOT23-3 package. SA has 0.915mm lead pitch and 1.30mm body width; SR has 0.975mm lead pitch and 1.40mm body width. They are not pin-to-pin or footprint compatible - PCB layout must match the specific variant ordered.
APX809S00-29SR-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 Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX809S00-29SR-7 FAQ
1.How can I place an order for APX809S00-29SR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX809S00-29SR-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 APX809S00-29SR-7 reliable?
The price and inventory of APX809S00-29SR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX809S00-29SR-7 is usually 5 days.
3.What payment methods are accepted for APX809S00-29SR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX809S00-29SR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX809S00-29SR-7?
APX809S00-29SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX809S00-29SR-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 APX809S00-29SR-7?
For technical support, including APX809S00-29SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX809S00-29SR-7 requirements.
6.How does Aetrix verify that APX809S00-29SR-7 is sourced from the original manufacturer or authorized distributors?
All APX809S00-29SR-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 APX809S00-29SR-7 meets industry standards.
7.What is the process for return or replacement of APX809S00-29SR-7?
All APX809S00-29SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX809S00-29SR-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 APX809S00-29SR-7 part is unused and in its original packaging.
Return procedure for APX809S00-29SR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX809S00-29SR-7 Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
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