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Diodes Incorporated APX803S00-29SA-7
- Part No.:
- APX803S00-29SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803S00-29SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:7,936
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Product details
Overview
APX803S00-29SA-7 from Diodes Incorporated is a 3-pin SOT23 open-drain microprocessor reset supervisor IC designed for precise 2.93V supply monitoring in embedded systems. It asserts an active-low RESET signal during power-up, brownout, or VCC drop below threshold and holds it for ≥1ms after VCC recovers. With 10µA typical supply current and guaranteed operation down to VCC = 1V, it supports portable and battery-powered µP applications.
For engineers reviewing the APX803S00-29SA-7 datasheet, APX803S00-29SA-7 pinout, APX803S00-29SA-7 application, or APX803S00-29SA-7 equivalent, key selection criteria include reset threshold accuracy (2.89–2.97V), 1.7ms minimum timeout, open-drain output compatibility with bidirectional µP reset pins, and SOT23-SA package footprint.
Technical Context
The APX803S00-29SA-7 implements a precision bandgap-based voltage comparator with ±0.04V threshold tolerance at +25°C and 30ppm/°C tempco over –40°C to +85°C. Its internal timer initiates only after VCC rises above the 2.93V threshold and guarantees ≥1ms reset assertion - distinct from longer-delay variants (e.g., APX803S-29SA-7: 140–280ms).
Designed for immunity to fast VCC transients, it maintains valid logic state on RESET down to VCC = 1V and features open-drain output capable of sinking ≥1.2mA at VOL ≤ 0.3V. The device requires no external components for basic operation and interfaces directly with CMOS or TTL reset inputs via a single pull-up resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V (typ), 2.89–2.97V (min/max) - ensures reliable detection of 3.0V rail brownout before µP malfunction |
| Reset Timeout | 1.7ms (typ), 1–3.3ms (min/max) - provides sufficient hold time for µP internal power stabilization |
| Supply Current | 10µA (typ), ≤15µA (max) - enables multi-year battery life in always-on supervisory circuits |
| VCC Operating Range | 1.0–5.5V - supports operation during deep brownout and compatibility with 1.8V–5V systems |
| RESET Output Type | Open-drain active-low - allows wired-OR with other reset sources and level-shifting across supply domains |
| ESD Protection | HBM ±3kV - meets industrial IEC 61000-4-2 system-level robustness requirements |
Pinout & Package
SOT23-3 (SA package): ultra-compact 2.9mm × 1.3mm surface-mount package with gull-wing leads, optimized for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground for internal comparator and timer - must be low-impedance connection to system ground plane |
| 2 | VCC | Power input and monitored supply rail - powers internal circuitry and serves as voltage reference source |
| 3 | RESET | Open-drain active-low reset output - requires external pull-up to target logic supply; sinks ≥1.2mA when asserted |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.93V threshold | ±0.04V tolerance at 25°C ensures accurate 3.0V rail supervision without calibration |
| 1.7ms minimum reset timeout | Guaranteed assertion period prevents premature µP release during supply recovery transients |
| Valid reset down to VCC = 1V | Enables fail-safe reset signaling even during severe undervoltage conditions |
| 10µA typical supply current | Reduces standby power burden in energy-constrained IoT and portable designs |
| Open-drain output architecture | Supports bidirectional reset arbitration and voltage-level translation between disparate supply domains |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Supervising 3.0V core supply in programmable logic controllers exposed to wide ambient temperature swings and EMI-rich factory environments. IC Role / Device Role / Timing Role: Voltage monitor and timed reset generator ensuring deterministic µP boot after line disturbances or hot-swap events. Use Value: Prevents firmware corruption by holding reset until 3.0V rail stabilizes within ±2% for ≥1.7ms post-recovery. | Use Scenario: Power sequencing and brownout protection in handheld ECG devices powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Primary reset supervisor asserting active-low signal when battery voltage drops below 2.93V during discharge. Use Value: Guarantees safe shutdown before analog front-end or ADC operation degrades, preserving measurement integrity. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Monitoring 3.3V domain in BCMs where load-dump transients and cold-crank undervoltage events occur. IC Role / Device Role / Timing Role: Immune-to-glitch reset generator that ignores <20µs VCC dips while asserting reset for ≥1ms after sustained brownout. Use Value: Eliminates false resets during engine cranking, improving system reliability without external RC filtering. | Use Scenario: Ensuring reliable µC initialization during AC/DC converter startup and grid voltage sags in DIN-rail meters. IC Role / Device Role / Timing Role: Precision 2.93V supervisor coordinating with isolated DC-DC output to guarantee clean power-on reset sequence. Use Value: Maintains meter certification compliance by preventing partial firmware execution during marginal input conditions. |
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 active-low RESET output; same 2.93V threshold and 140–280ms timeout | Requires no external pull-up; incompatible with wired-OR reset bus topologies | Select when simplified BOM (no pull-up resistor) and single-source reset assertion are prioritized |
| TPS3808G18DBVR | 2.5V fixed threshold; 200ms timeout; higher 16µA ICC; TI's enhanced ESD (±4kV HBM) | Not pin-compatible; requires different PCB layout and may need recalibration for 3.0V rail margin | Select when higher ESD robustness and TI supply chain assurance outweigh footprint change cost |
Compared with APX803S00-29SA-7, APX809S-29SA-7 eliminates the pull-up resistor but forfeits reset bus sharing capability, while TPS3808G18DBVR offers superior ESD rating but lacks the precise 2.93V threshold needed for tight 3.0V rail margins.
Availability
APX803S00-29SA-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for APX803S00-29SA-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 APX803S series belongs to Diodes' µP supervisory product line, engineered specifically for cost-sensitive, space-constrained applications demanding precision voltage monitoring and glitch-immune reset generation without external components.
FAQ
What is the exact reset threshold voltage for APX803S00-29SA-7?
The APX803S00-29SA-7 has a nominal reset threshold of 2.93V, with a guaranteed range of 2.89V to 2.97V at +25°C. This specification is validated across the full operating temperature range (–40°C to +85°C) with a maximum tempco of 30ppm/°C, ensuring consistent 3.0V rail supervision under thermal stress.
Does APX803S00-29SA-7 require an external pull-up resistor on the RESET pin?
Yes - the APX803S00-29SA-7 features an open-drain RESET output and requires an external pull-up resistor to the target logic supply (e.g., 3.3V or 5V). Typical values range from 4.7kΩ to 10kΩ; the device can sink ≥1.2mA while maintaining VOL ≤ 0.3V, supporting standard CMOS/TTL input thresholds.
Can APX803S00-29SA-7 supervise a 5V supply?
No - the APX803S00-29SA-7 is configured for 2.93V threshold and is intended for 3.0V systems. For 5V supply supervision, Diodes offers APX803SXX-40SA-7 (4.00V threshold) or APX803SXX-44SA-7 (4.38V threshold); using the -29 variant on 5V would result in immediate, permanent reset assertion.
What is the minimum VCC required for APX803S00-29SA-7 to assert a valid RESET signal?
The APX803S00-29SA-7 guarantees correct RESET logic state (low when asserted, high-impedance when released) down to VCC = 1.0V. Below 1.0V, the output transitions to high-impedance and no longer actively sinks current - this aligns with most µPs being non-operational below 1.0V, avoiding undefined reset states.
APX803S00-29SA-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:
- 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
APX803S00-29SA-7 FAQ
1.How can I place an order for APX803S00-29SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803S00-29SA-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 APX803S00-29SA-7 reliable?
The price and inventory of APX803S00-29SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803S00-29SA-7 is usually 5 days.
3.What payment methods are accepted for APX803S00-29SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803S00-29SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803S00-29SA-7?
APX803S00-29SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803S00-29SA-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 APX803S00-29SA-7?
For technical support, including APX803S00-29SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803S00-29SA-7 requirements.
6.How does Aetrix verify that APX803S00-29SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803S00-29SA-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 APX803S00-29SA-7 meets industry standards.
7.What is the process for return or replacement of APX803S00-29SA-7?
All APX803S00-29SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803S00-29SA-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 APX803S00-29SA-7 part is unused and in its original packaging.
Return procedure for APX803S00-29SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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