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Diodes Incorporated APX803S00-46SR-7
- Part No.:
- APX803S00-46SR-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803S00-46SR-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,270
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Product details
Overview
APX803S00-46SR-7 from Diodes Incorporated is a 3-pin microprocessor reset supervisor IC with open-drain active-low RESET output, 4.63V ±0.07V precision reset threshold, 1.7ms typical reset timeout, 10µA typical supply current, and guaranteed operation down to VCC = 1V. It monitors 5.0V systems in embedded controllers and portable equipment where brownout immunity and low-power supervision are critical.
For engineers reviewing the APX803S00-46SR-7 datasheet, APX803S00-46SR-7 pinout, APX803S00-46SR-7 application, or APX803S00-46SR-7 equivalent, key selection criteria include reset threshold accuracy (±30 ppm/°C tempco), open-drain drive capability (1.2mA sink at 0.3V), SOT23-SR package compatibility, and 1ms minimum timeout compliance for fast-boot µC systems.
Technical Context
The APX803S00-46SR-7 implements a precision bandgap-based voltage comparator with hysteresis to detect VCC drops below 4.63V, triggering an open-drain RESET assertion. Its internal timer initiates only after VCC rises above the threshold and holds RESET low for 1.7ms (typical), ensuring reliable deassertion timing independent of supply ramp rate.
Designed for single-supply monitoring, it features ESD protection (3kV HBM), operates across –40°C to +85°C, and guarantees valid RESET logic state down to VCC = 1V. The SOT23-SR pinout places GND on Pin 1, VCC on Pin 2, and RESET on Pin 3 - optimized for PCB layout in space-constrained portable designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±0.07V (min/max over temp); ensures accurate 5.0V supply monitoring with ±1.5% tolerance |
| Reset Timeout | 1.7ms typical (1–3.3ms min/max); provides sufficient hold time for fast-boot microcontrollers |
| Supply Current | 10µA typical at +25°C; enables multi-year battery life in always-on supervisory applications |
| RESET Sink Current | 1.2mA @ VOL ≤ 0.3V; drives standard CMOS inputs without external pull-down |
| Operating Voltage Range | 1.0V to 5.5V; supports valid reset assertion even during deep brownout conditions |
| Temperature Range | –40°C to +85°C; fully specified for industrial-grade embedded system deployment |
| Reset Tempco | 30 ppm/°C max; maintains threshold stability across full operating temperature range |
Pinout & Package
SOT23-SR package: 3-pin surface-mount, 1.3mm × 2.9mm footprint, 0.95mm height, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and timer; must be low-impedance connection to system ground plane |
| 2 | VCC | Primary power input; supplies internal circuitry and defines monitored supply rail |
| 3 | RESET | Open-drain active-low output; requires external pull-up to monitored or host supply; sinks up to 1.2mA |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63V threshold | ±0.07V tolerance ensures reliable detection of 5.0V supply droop before µP malfunction |
| 1.7ms fixed reset timeout | Guarantees minimum reset pulse width for ARM Cortex-M0/M3 and similar fast-start MCUs |
| 10µA ultra-low ICC | Reduces standby power in battery-backed systems by >95% vs. legacy reset ICs |
| Valid RESET down to VCC = 1V | Prevents spurious release during deep undervoltage events common in Li-ion discharge profiles |
| Open-drain RESET output | Enables wired-OR reset bus sharing across multiple supervisors or bidirectional µP reset pins |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Supervising 5.0V main power rail in DIN-rail mounted programmable logic controllers exposed to wide ambient temperature swings and electrical noise. IC Role / Device Role / Timing Role: Microprocessor reset supervisor asserting active-low signal during brownout or cold start to prevent firmware corruption. Use Value: 30 ppm/°C tempco and –40°C to +85°C rating ensure stable reset behavior across factory floor environments without calibration. |
Use Scenario: Power sequencing and supply monitoring in handheld ECG devices powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Reset generator maintaining valid reset until VCC stabilizes above 4.63V post-battery insertion or charger engagement. Use Value: 10µA supply current extends device shelf life; 1V minimum VCC operation prevents premature reset release during battery sag. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Monitoring 5.0V domain in non-safety-critical body electronics (e.g., door module, lighting control) subject to load dump transients. IC Role / Device Role / Timing Role: Brownout detector holding µC in reset during alternator ripple or ignition switching noise. Use Value: 3kV HBM ESD rating and glitch-immune comparator reject fast VCC transients without false triggering. |
Use Scenario: Ensuring deterministic startup of metrology SoCs in utility-grade electricity meters with dual-supply architecture (5V analog, 3.3V digital). IC Role / Device Role / Timing Role: Primary reset source for 5V analog front-end, coordinating with secondary supervisor on 3.3V rail via shared open-drain bus. Use Value: Open-drain output allows level-shifting and OR-ing with other reset sources without voltage conflict. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 4.63V threshold, push-pull output, 140ms timeout, 15µA ICC | Requires no external pull-up; unsuitable for wired-OR reset buses or bidirectional µP pins | Select when board-level simplicity outweighs reset bus flexibility and ultra-low ICC is non-critical |
| TPS3808G01DBVR | 4.63V threshold, open-drain output, 200ms timeout, adjustable delay via capacitor | Longer timeout suits slower-boot DSPs; capacitor-based timing adds BOM cost and layout sensitivity | Select when field-programmable timeout is required and 200ms minimum hold time aligns with target µP spec |
Compared with MAX809SEUR+T and TPS3808G01DBVR, the APX803S00-46SR-7 uniquely combines ultra-low 10µA ICC, fixed 1.7ms timeout for fast-boot systems, and SOT23-SR pinout - making it optimal for space- and power-constrained portable and industrial controllers requiring deterministic short-duration reset assertion.
Availability
APX803S00-46SR-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 APX803S00-46SR-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' precision voltage supervisor product line, engineered specifically for deterministic power-on reset and brownout protection in resource-constrained embedded systems with strict power and footprint requirements.
FAQ
What is the exact reset threshold voltage and tolerance for APX803S00-46SR-7?
The APX803S00-46SR-7 has a nominal reset threshold of 4.63V, with a guaranteed range of 4.56V to 4.70V at +25°C and ±0.07V variation over –40°C to +85°C. This 4.63V setting targets 5.0V supply rails with 7% headroom, ensuring reset assertion before µP operational failure.
Does APX803S00-46SR-7 require an external pull-up resistor on the RESET pin?
Yes - the RESET pin is open-drain active-low and requires an external pull-up resistor to a valid logic-high voltage (typically the same VCC rail being monitored or a separate host supply). A 10kΩ to 100kΩ resistor is typical; value selection balances rise time, power consumption, and noise immunity.
Can APX803S00-46SR-7 supervise a 3.3V supply instead of 5.0V?
No - its 4.63V threshold is specifically calibrated for 5.0V systems. Using it on a 3.3V rail would cause continuous reset assertion since VCC never reaches the threshold. For 3.3V supervision, use APX803S00-31SR-7 (3.08V threshold) or APX803S00-33SR-7 (3.3V variant, if available).
What is the minimum VCC voltage at which APX803S00-46SR-7 guarantees correct RESET logic state?
The device guarantees valid RESET output (logic low when asserted, high-impedance when released) down to VCC = 1.0V. Below 1.0V, the internal circuitry ceases operation and RESET becomes high-impedance - consistent with most µPs being non-functional below this voltage.
APX803S00-46SR-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:
- 4.63V
- 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
APX803S00-46SR-7 FAQ
1.How can I place an order for APX803S00-46SR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803S00-46SR-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 APX803S00-46SR-7 reliable?
The price and inventory of APX803S00-46SR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803S00-46SR-7 is usually 5 days.
3.What payment methods are accepted for APX803S00-46SR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803S00-46SR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803S00-46SR-7?
APX803S00-46SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803S00-46SR-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 APX803S00-46SR-7?
For technical support, including APX803S00-46SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803S00-46SR-7 requirements.
6.How does Aetrix verify that APX803S00-46SR-7 is sourced from the original manufacturer or authorized distributors?
All APX803S00-46SR-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 APX803S00-46SR-7 meets industry standards.
7.What is the process for return or replacement of APX803S00-46SR-7?
All APX803S00-46SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803S00-46SR-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 APX803S00-46SR-7 part is unused and in its original packaging.
Return procedure for APX803S00-46SR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803S00-46SR-7 Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
Diodes Incorporated
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APX803L20-29SA-7
Diodes Incorporated
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