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Diodes Incorporated APX810S-44SR-7
- Part No.:
- APX810S-44SR-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX810S-44SR-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,995
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Product details
Overview
APX810S-44SR-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory functions in 5V digital systems. It provides active-high push-pull RESET output with 4.38V (typ) threshold, 240ms minimum reset timeout, 7µA supply current, and guaranteed operation down to VCC = 1V - used in battery-powered controllers and embedded instrumentation for reliable power-on reset assertion.
For engineers reviewing the APX810S-44SR-7 datasheet, APX810S-44SR-7 pinout, APX810S-44SR-7 application, or APX810S-44SR-7 equivalent, key selection criteria include reset threshold accuracy (±0.06V), temperature coefficient (30ppm/°C), push-pull drive capability (500µA source / 1.2mA sink), low-VCC validity (1V), and SOT23-SR package compatibility with space-constrained PCB layouts.
Technical Context
The APX810S-44SR-7 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 4.38V threshold. Its internal timing circuit ensures reset remains asserted for ≥240ms after VCC rises above threshold, independent of external components.
Designed for immunity to fast transients, it guarantees correct logic state at RESET output across full operating range (VCC = 1.0–5.5V, TA = −40°C to +125°C) and supports push-pull interfacing directly with µP reset inputs without pull-up resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V (typ), ±0.06V tolerance - ensures reliable detection of 5V rail brownout before µP malfunction |
| Reset Timeout | 240ms (min) - meets JEDEC JESD8-12B power-on reset hold time for 5V microcontrollers |
| Supply Current | 7µA (typ) - enables multi-year battery life in portable monitoring devices |
| Operating VCC Range | 1.0V to 5.5V - guarantees valid reset assertion even during deep brownout or cold-start conditions |
| Output Type | Push-pull active-high - eliminates need for external pull-up resistor and reduces BOM count |
| Temp Coefficient | 30ppm/°C - maintains threshold stability across industrial temperature range (−40°C to +125°C) |
Pinout & Package
APX810S-44SR-7 is housed in a RoHS-compliant, halogen-free SOT23-3 (SR) package with gull-wing leads, optimized for reflow soldering and high-density PCB layouts.
| 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-high push-pull reset output; drives µP /RESET pin directly with 500µA source / 1.2mA sink capability |
| 3 | VCC | Power supply input; monitors this rail for threshold violation; operates down to 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.38V threshold | Enables accurate supervision of nominal 5V supplies with margin for ripple and aging |
| 240ms reset timeout | Meets minimum reset pulse width requirements for ARM Cortex-M and PIC microcontrollers |
| 7µA quiescent current | Reduces standby power in always-on sensor nodes and IoT edge devices |
| Valid reset at VCC = 1V | Supports graceful shutdown sequencing and low-voltage brownout recovery |
| SOT23-SR footprint | Compatible with standard pick-and-place equipment and IPC-7351B land pattern (2.4mm × 1.3mm) |
Applications
| Industrial Controller Reset | Battery-Powered Data Logger |
|---|---|
Use Scenario: PLC I/O module requires deterministic reset during 5V rail instability caused by relay switching or EMI. IC Role / Device Role / Timing Role: Voltage detector asserts active-high RESET to hold controller in reset until 5V rail stabilizes for ≥240ms. Use Value: Prevents spurious firmware execution and register corruption during transient supply dips. | Use Scenario: Remote environmental sensor node powered by LiSOCl₂ battery must retain configuration during voltage sag. IC Role / Device Role / Timing Role: Monitors battery-derived 5V LDO output and triggers controlled MCU reset before undervoltage lockout. Use Value: Enables safe EEPROM save and RTC preservation prior to brownout-induced shutdown. |
| Medical Diagnostic Handheld | Smart Energy Meter |
Use Scenario: Portable ultrasound device uses 5V rail for FPGA and ADC; power integrity is critical during acquisition bursts. IC Role / Device Role / Timing Role: Provides clean, glitch-immune reset signal synchronized to 5V rail recovery after load-step events. Use Value: Eliminates need for RC-based reset circuits, improving long-term reliability and calibration stability. | Use Scenario: Electricity meter with metrology SoC requires guaranteed reset on AC/DC converter startup delay. IC Role / Device Role / Timing Role: Detects 5V auxiliary supply ramp and holds meter SoC in reset until stable for >240ms. Use Value: Ensures accurate time-of-use logging and prevents flash memory write corruption during power-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB44DBZR | 4.40V threshold, 200ms timeout, open-drain output requiring external pull-up | Lacks push-pull drive; adds component count and increases board area | Select when open-drain flexibility is needed for wired-OR reset buses |
| MAX809SEUR+T | 4.40V threshold, 240ms timeout, push-pull active-low output | Inverts reset polarity; requires µP with active-low reset input or level-shifting | Select only if existing design uses active-low reset architecture and layout cannot accommodate polarity change |
Compared with TLV803EB44DBZR and MAX809SEUR+T, APX810S-44SR-7 delivers identical threshold and timeout while providing active-high push-pull output - reducing external components, simplifying layout, and eliminating polarity conversion overhead in new 5V µP designs.
Availability
APX810S-44SR-7 is available at Aetrix Electronics and suitable for industrial controllers, battery-powered data loggers, medical handhelds, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for APX810S-44SR-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 APX8xxS series belongs to Diodes' precision voltage supervisor product line, engineered specifically for cost-sensitive, space-constrained µP reset applications where low quiescent current and guaranteed low-VCC operation are mandatory.
FAQ
What is the exact reset threshold voltage for APX810S-44SR-7?
The APX810S-44SR-7 has a nominal reset threshold of 4.38V (typical), with guaranteed min/max values of 4.32V and 4.44V at +25°C. This value is specified per DS39140 Rev. 2–2, Table 1, and remains stable across temperature with a 30ppm/°C coefficient.
Does APX810S-44SR-7 require an external capacitor for reset timing?
No. The 240ms reset timeout is generated internally using a precision RC oscillator; no external timing capacitor is required. This eliminates component variation, PCB area, and aging-related drift - a key differentiator from RC-based reset circuits.
Can APX810S-44SR-7 operate with a 3.3V supply rail?
No. APX810S-44SR-7 is configured for 5V systems with a 4.38V threshold. For 3.3V rails, Diodes offers APX810S-31SR-7 (3.08V threshold) or APX810S-29SR-7 (2.93V threshold), both in identical SOT23-SR packaging and electrical interface.
Is the SOT23-SR package compatible with automated optical inspection (AOI)?
Yes. The SOT23-SR package features gull-wing leads with standardized 0.95mm pitch and defined solder joint geometry per IPC-A-610 Class 2. Its marking "YB" (per DS39140 p.8) is laser-etched for high-contrast AOI readability and traceability in high-volume manufacturing.
APX810S-44SR-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:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX810S-44SR-7 FAQ
1.How can I place an order for APX810S-44SR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX810S-44SR-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 APX810S-44SR-7 reliable?
The price and inventory of APX810S-44SR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX810S-44SR-7 is usually 5 days.
3.What payment methods are accepted for APX810S-44SR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX810S-44SR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX810S-44SR-7?
APX810S-44SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX810S-44SR-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 APX810S-44SR-7?
For technical support, including APX810S-44SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX810S-44SR-7 requirements.
6.How does Aetrix verify that APX810S-44SR-7 is sourced from the original manufacturer or authorized distributors?
All APX810S-44SR-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 APX810S-44SR-7 meets industry standards.
7.What is the process for return or replacement of APX810S-44SR-7?
All APX810S-44SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX810S-44SR-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 APX810S-44SR-7 part is unused and in its original packaging.
Return procedure for APX810S-44SR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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