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Diodes Incorporated APX803S00-44SA-7
- Part No.:
- APX803S00-44SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803S00-44SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,435
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Product details
Overview
APX803S00-44SA-7 from Diodes Incorporated is a 3-pin microprocessor reset circuit with open-drain active-low RESET output, precision 4.38 V (typ.) reset threshold, 1.7 ms (typ.) reset timeout, 10 µA supply current, and guaranteed operation down to VCC = 1 V. It monitors 5.0 V systems in embedded controllers and portable equipment to prevent erroneous code execution during power-up or brownout.
For engineers reviewing the APX803S00-44SA-7 datasheet, APX803S00-44SA-7 pinout, APX803S00-44SA-7 application, or APX803S00-44SA-7 equivalent, key selection criteria include reset threshold accuracy (±0.07 V), open-drain drive capability (1.2 mA sink at 0.3 V), temperature-stable tempco (30 ppm/°C), and SOT23-3 SA package compatibility with space-constrained PCB layouts.
Technical Context
The APX803S00-44SA-7 implements a precision bandgap-based voltage comparator with hysteresis to detect VCC drops below 4.38 V (typ.), triggering an open-drain RESET signal that remains asserted for ≥1 ms after VCC recovers above threshold. Its internal timer ensures deterministic reset timing independent of external components.
Designed for low-power supervision, it draws only 10 µA (typ.) at 3.3 V and guarantees valid logic-low RESET output for VCC ≥ 1 V. The comparator ignores fast transients (dVCC/dt ≤ 100 V/µs) and maintains correct state across –40°C to +85°C ambient range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38 V (typ.), ±0.07 V tolerance - ensures reliable detection of 5.0 V supply brownout before system instability |
| Reset Timeout | 1.7 ms (typ.), min 1 ms - provides sufficient hold time for microcontroller core initialization |
| Supply Current | 10 µA (typ.) at +25°C - enables multi-year battery life in portable monitoring devices |
| Output Type | Open-drain active-low - allows wired-OR reset bus sharing and level-shifting across mixed-voltage domains |
| Valid VCC Range | 1.0 V to 5.5 V - supports reset assertion even during deep brownout, preventing undefined MCU state |
| Tempco | 30 ppm/°C - maintains threshold stability over industrial temperature range without calibration |
| ESD Protection | HBM ±3 kV - enhances robustness against handling-induced transients in assembly environments |
Pinout & Package
SOT23-3 (SA package), surface-mount, 2.9 mm × 1.3 mm footprint, 0.95 mm height, RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground return path for internal comparator and output stage |
| 2 | VCC | Power input pin supplying internal circuitry; monitored for reset condition |
| 3 | RESET | Open-drain active-low output; requires external pull-up to define logic-high level |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.38 V threshold | Enables accurate supervision of nominal 5.0 V rails without external resistive dividers |
| 1.7 ms fixed reset timeout | Guarantees minimum reset pulse width compatible with ARM Cortex-M0/M3 boot sequences |
| 10 µA typical supply current | Reduces quiescent load on coin-cell or energy-harvesting power sources |
| Valid reset down to VCC = 1 V | Prevents spurious release during deep undervoltage events common in battery discharge profiles |
| Open-drain output architecture | Supports multi-source reset arbitration and voltage-level translation between 1.8 V, 3.3 V, and 5 V domains |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Supervising 5.0 V power rail in DIN-rail mounted programmable logic controllers exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Microprocessor reset supervisor asserting active-low signal during AC line sags or cold-start conditions. Use Value: 30 ppm/°C tempco ensures consistent 4.38 V trip point across –40°C to +85°C, eliminating field failures due to thermal drift. |
Use Scenario: Power-on reset generation in handheld ECG units powered by single Li-ion cells (2.8–4.2 V). IC Role / Device Role / Timing Role: Brownout detector maintaining reset until VCC exceeds 4.38 V and sustains 1.7 ms timeout post-recovery. Use Value: 10 µA supply current extends battery runtime beyond 12 months in standby mode without compromising reset reliability. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Monitoring 5.0 V DC-DC output in vehicle body electronics subjected to load-dump transients. IC Role / Device Role / Timing Role: Glitch-immune reset generator rejecting dVCC/dt up to 100 V/µs while asserting reset on sustained under-voltage. Use Value: HBM ±3 kV ESD rating improves resilience during automated PCB assembly and in-vehicle service operations. |
Use Scenario: Ensuring deterministic startup of metrology SoCs in utility-grade electricity meters operating from 3.3 V LDOs. IC Role / Device Role / Timing Role: Precision reset supervisor with 4.38 V threshold aligned to 5.0 V auxiliary supply used for real-time clock backup. Use Value: Open-drain output enables shared reset bus with RTC and communication ICs, reducing BOM count and board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 4.40 V threshold (±0.5%), 240 ms timeout, push-pull output, 15 µA ICC | Fixed long timeout unsuitable for fast-boot MCUs; push-pull eliminates need for pull-up but prevents bus sharing | Select when system requires guaranteed 240 ms reset hold and no shared reset bus |
| TPS3808G01DBVR | 4.38 V threshold (±0.5%), 20 ms timeout, open-drain output, 12 µA ICC, enable pin | Programmable enable input adds control flexibility but increases pin count and layout complexity | Select when dynamic reset enable/disable is required during firmware updates or sleep mode transitions |
Compared with MAX809SEUR+T and TPS3808G01DBVR, the APX803S00-44SA-7 offers the shortest standard timeout (1.7 ms) optimized for low-latency boot sequences, lowest quiescent current (10 µA), and SOT23-3 SA footprint-making it ideal for compact, battery-sensitive designs where precise 5.0 V supervision and minimal board area are critical.
Availability
APX803S00-44SA-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 APX803S00-44SA-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' supervisory IC product line, engineered specifically for cost-sensitive, space-constrained microprocessor reset applications demanding precision voltage monitoring and ultra-low power consumption.
FAQ
What is the exact reset threshold voltage for APX803S00-44SA-7?
The APX803S00-44SA-7 has a nominal reset threshold of 4.38 V (typical), with a guaranteed range of 4.31 V to 4.45 V at +25°C. This value is factory-trimmed and specified across the full –40°C to +85°C operating temperature range with a maximum tempco of 30 ppm/°C.
Does APX803S00-44SA-7 require an external pull-up resistor on the RESET pin?
Yes - the RESET pin is open-drain active-low and must be pulled up externally to a logic-compatible voltage (e.g., 3.3 V or 5.0 V). Typical pull-up values range from 10 kΩ to 100 kΩ depending on bus capacitance and rise-time requirements; Diodes recommends 47 kΩ for general-purpose use.
Can APX803S00-44SA-7 operate reliably below 1.0 V VCC?
No - the device guarantees correct RESET logic state only for VCC ≥ 1.0 V. Below 1.0 V, the internal circuitry ceases to function and RESET becomes high-impedance; this is intentional and aligns with most microcontrollers being non-operational below 1.0 V.
How does the 1.7 ms reset timeout compare to other APX803S variants?
The "00" suffix denotes the shortest timeout option: 1.7 ms (typical), with minimum 1 ms and maximum 3.3 ms. Other variants include "05" (50 ms typ.) and blank (240 ms typ.). All share identical threshold, package, and electrical specs - only timeout duration differs per part number.
APX803S00-44SA-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:
- 4.38V
- 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
APX803S00-44SA-7 FAQ
1.How can I place an order for APX803S00-44SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803S00-44SA-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 APX803S00-44SA-7 reliable?
The price and inventory of APX803S00-44SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803S00-44SA-7 is usually 5 days.
3.What payment methods are accepted for APX803S00-44SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803S00-44SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803S00-44SA-7?
APX803S00-44SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803S00-44SA-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 APX803S00-44SA-7?
For technical support, including APX803S00-44SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803S00-44SA-7 requirements.
6.How does Aetrix verify that APX803S00-44SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803S00-44SA-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 APX803S00-44SA-7 meets industry standards.
7.What is the process for return or replacement of APX803S00-44SA-7?
All APX803S00-44SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803S00-44SA-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 APX803S00-44SA-7 part is unused and in its original packaging.
Return procedure for APX803S00-44SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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