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Diodes Incorporated APX803S00-29SR-7
- Part No.:
- APX803S00-29SR-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803S00-29SR-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:27,471
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Product details
Overview
APX803S00-29SR-7 from Diodes Incorporated is a 3-pin SOT23 open-drain microprocessor reset supervisor IC with 2.93V precision reset threshold, 1.7ms typical reset timeout, 10µA supply current, and guaranteed operation down to VCC = 1V. It monitors 3.0V/3.3V digital power rails in embedded controllers and portable systems to prevent erroneous code execution during brownout or power-up.
For engineers reviewing the APX803S00-29SR-7 datasheet, APX803S00-29SR-7 pinout, APX803S00-29SR-7 application, or APX803S00-29SR-7 equivalent, key selection factors include reset threshold accuracy (±0.04V), open-drain output compatibility with bidirectional µP reset pins, low-voltage validity (1V), and SOT23-SR package footprint alignment with space-constrained PCB layouts.
Technical Context
The APX803S00-29SR-7 implements a precision bandgap-based voltage comparator with 30ppm/°C tempco to detect VCC drops below 2.93V, triggering an open-drain active-low RESET signal. Its internal timer asserts reset for ≥1ms after VCC recovers above threshold, with immunity to fast transients (dVCC/dt ≤ 100V/µs).
Designed for single-supply monitoring, it requires no external components and interfaces directly to µP reset inputs via pull-up resistor. The SR variant uses pin 1=GND, pin 2=VCC, pin 3=RESET - distinct from SA pinout - ensuring correct PCB layout implementation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V (typ), ±0.04V tolerance ensures reliable 3.0V rail supervision without false triggers |
| Reset Timeout | 1.7ms (typ), minimum 1ms guarantees sufficient hold time for µP initialization sequences |
| Supply Current | 10µA (typ), enables battery life extension in portable equipment with minimal quiescent load |
| VCC Validity Range | 1.0V to 5.5V, allows reset assertion integrity even during deep brownout conditions |
| Output Type | Open-drain active-low, supports wired-OR reset buses and level-shifting across supply domains |
| Tempco | 30ppm/°C, maintains threshold stability across -40°C to +85°C industrial temperature range |
| ESD Protection | HBM ±3kV, safeguards against handling damage in automated assembly environments |
Pinout & Package
SOT23-3 (SR package) with 2.9mm × 1.3mm footprint, 0.95mm height, and gull-wing leads. Thermal resistance θJA = 232°C/W supports operation in compact enclosures without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and reset timer; must connect to system ground plane for noise immunity |
| 2 | VCC | Power input pin monitoring target supply; supplies internal circuitry and defines reset threshold reference |
| 3 | RESET | Open-drain active-low output; requires external pull-up to monitored or host supply for logic-level compatibility |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.93V threshold | Enables accurate supervision of 3.0V logic rails without calibration or trimming components |
| 1.7ms fixed reset timeout | Meets µP reset timing requirements for fast-boot applications while minimizing system latency |
| Open-drain output stage | Permits direct interface with bidirectional µP reset pins and multi-source reset bus architectures |
| 1V minimum VCC operation | Ensures deterministic reset behavior during deep undervoltage events before system collapse |
| Lead-free & halogen-free | Fully RoHS-compliant construction meets IPC-J-STD-020 reflow and environmental compliance mandates |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Supervising 3.0V core supply in programmable logic controller CPU modules operating in factory-floor environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Reset supervisor asserting active-low signal during brownout to halt instruction fetch until stable 3.0V rail is restored. Use Value: Prevents corrupted I/O state transitions and firmware lockups by guaranteeing ≥1ms reset pulse at VCC recovery, validated over -40°C to +85°C. | Use Scenario: Power-rail monitoring in handheld ECG devices powered by single-cell Li-ion batteries with dynamic 2.8–3.3V discharge profile. IC Role / Device Role / Timing Role: Precision 2.93V threshold detection triggers reset before battery sag causes ADC conversion errors or display glitches. Use Value: 10µA supply current extends battery runtime by >200 hours versus higher-current supervisors, with 30ppm/°C tempco maintaining accuracy across clinical operating temperatures. |
| Smart Energy Meters | Automotive Body Control Modules |
Use Scenario: Monitoring auxiliary 3.3V supply in DIN-rail mounted electricity meters exposed to grid voltage sags and surges. IC Role / Device Role / Timing Role: Open-drain RESET output tied to microcontroller's bidirectional reset pin via 10kΩ pull-up, enabling shared reset arbitration. Use Value: Immunity to dVCC/dt up to 100V/µs prevents false resets during fast transients on AC-DC converter outputs. | Use Scenario: Supervising 3.0V domain powering CAN transceiver and microcontroller in vehicle door module with stop-start battery voltage fluctuations. IC Role / Device Role / Timing Role: Guarantees reset assertion down to VCC = 1V, ensuring safe shutdown before microcontroller enters undefined state during cranking. Use Value: Valid reset signaling at 1V eliminates need for secondary low-VCC supervisor, reducing BOM count and PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX809S-29SA-7 | Push-pull RESET output (vs. open-drain); same 2.93V threshold and 1.7ms timeout | Requires no external pull-up; incompatible with wired-OR reset buses or bidirectional µP pins | Select when board layout lacks space for pull-up resistor or µP reset pin is unidirectional input only |
| MAX809TRD29+T | 2.93V threshold, push-pull output, 240ms timeout (not 1.7ms); 15µA supply current | Longer reset pulse suits slower-boot µPs; not suitable for fast-recovery systems requiring sub-10ms reset release | Select only if system boot sequence demands ≥200ms reset hold time and push-pull drive is acceptable |
Compared with APX809S-29SA-7 and MAX809TRD29+T, the APX803S00-29SR-7 uniquely combines open-drain flexibility, ultra-low 10µA current, and precise 1.7ms timing - making it optimal for space-constrained, battery-sensitive designs needing multi-source reset coordination.
Availability
APX803S00-29SR-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, smart energy meters, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for APX803S00-29SR-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 consumer markets.
The APX803S series belongs to Diodes' microprocessor supervisory product line, engineered specifically for cost-sensitive, space-constrained embedded systems requiring precision voltage monitoring and deterministic reset timing without external components.
FAQ
What is the exact reset threshold voltage and tolerance for APX803S00-29SR-7?
The APX803S00-29SR-7 has a nominal reset threshold of 2.93V at +25°C, with a guaranteed range of 2.89V to 2.97V across temperature and process variation. This 2.93V value is factory-trimmed and specified with ±0.04V tolerance, enabling accurate supervision of 3.0V logic supplies without external calibration.
Does APX803S00-29SR-7 require an external pull-up resistor on the RESET pin?
Yes - the APX803S00-29SR-7 features an open-drain RESET output that must be pulled up externally to a valid logic-high voltage (typically the monitored VCC or another compatible supply). A standard 10kΩ resistor is recommended; absence of this pull-up leaves RESET floating and non-functional.
Can APX803S00-29SR-7 operate reliably below 1.8V VCC?
Yes - the device guarantees valid reset assertion down to VCC = 1.0V, with RESET remaining low until VCC rises above 2.93V and the 1.7ms timeout completes. Below 1.0V, RESET becomes high-impedance, but this aligns with µP inactivity at such voltages, ensuring no spurious behavior.
How does the SR package differ from SA in pin configuration?
The SR package uses pin 1=GND, pin 2=VCC, pin 3=RESET; the SA variant swaps pins 1 and 2 (pin 1=VCC, pin 2=GND). This difference is critical for PCB layout - using SA footprint for SR parts causes immediate VCC-to-GND short. The marking "S7" on top confirms SR variant per Diodes' documentation.
APX803S00-29SR-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:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX803S00-29SR-7 FAQ
1.How can I place an order for APX803S00-29SR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803S00-29SR-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 APX803S00-29SR-7 reliable?
The price and inventory of APX803S00-29SR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803S00-29SR-7 is usually 5 days.
3.What payment methods are accepted for APX803S00-29SR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803S00-29SR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803S00-29SR-7?
APX803S00-29SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803S00-29SR-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 APX803S00-29SR-7?
For technical support, including APX803S00-29SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803S00-29SR-7 requirements.
6.How does Aetrix verify that APX803S00-29SR-7 is sourced from the original manufacturer or authorized distributors?
All APX803S00-29SR-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 APX803S00-29SR-7 meets industry standards.
7.What is the process for return or replacement of APX803S00-29SR-7?
All APX803S00-29SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803S00-29SR-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 APX803S00-29SR-7 part is unused and in its original packaging.
Return procedure for APX803S00-29SR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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