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Diodes Incorporated APX810S05-44SA-7
- Part No.:
- APX810S05-44SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX810S05-44SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,409
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Product details
Overview
APX810S05-44SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory functions in 5V digital systems. It provides active-high reset assertion when VCC drops below 4.38V (typ), maintains reset for ≥50ms after recovery, features 7µA supply current (typ), operates down to VCC = 1V, and uses a push-pull output in SOT23-3 (SA) package for portable equipment power monitoring.
For engineers reviewing the APX810S05-44SA-7 datasheet, APX810S05-44SA-7 pinout, APX810S05-44SA-7 application, or APX810S05-44SA-7 equivalent, key selection criteria include reset threshold accuracy (±0.06V), guaranteed reset validity at 1V VCC, 50ms minimum timeout period, and compatibility with +5V supply rails requiring reliable power-on reset sequencing.
Technical Context
The APX810S05-44SA-7 integrates a precision voltage comparator with hysteresis and an internal timer circuit to generate a fixed-duration active-high reset pulse. Its reset threshold is trimmed to 4.38V (typ) with ±0.06V tolerance over temperature and exhibits 30ppm/°C drift.
It employs a push-pull output stage capable of sourcing 500µA at 0.8×VCC and sinking 1.2mA at ≤0.3V, ensuring robust interface with µP reset inputs. The device remains functional across -40°C to +125°C ambient and draws only 7µA typical supply current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V (typ), ±0.06V max deviation - ensures reliable detection of 5V rail undervoltage before system instability |
| Reset Timeout | 50ms (typ), 20–70ms range - guarantees sufficient reset hold time for µP initialization sequences |
| Supply Current | 7µA (typ), ≤16µA max - enables multi-year battery life in portable applications |
| Valid Reset Range | VCC ≥ 1.0V - allows reset assertion even during deep brown-out conditions |
| Output Type | Push-pull active-high - eliminates external pull-up resistor and supports direct µP reset input drive |
| Temp Coefficient | 30ppm/°C - maintains threshold stability across industrial temperature range (-40°C to +125°C) |
Pinout & Package
SOT23-3 (SA) package: 1.30mm × 2.40mm × 0.915mm body, 0.975mm lead pitch, gull-wing leads, RoHS-compliant "Green" molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 | RESET | Active-high push-pull reset output; drives µP reset pin directly without external components |
| 3 | VCC | Power supply input; monitors this rail for undervoltage; valid from 1.0V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.38V threshold | Factory-trimmed comparator enables accurate 5V rail supervision without calibration or external resistors |
| 50ms minimum reset pulse | Guaranteed timing ensures full µP core and peripheral initialization before release |
| 1V minimum operating VCC | Continues asserting reset during severe brown-out, preventing partial execution or latch-up |
| 7µA supply current | Reduces standby power draw in battery-powered instruments and IoT edge nodes |
| SOT23-3 footprint | Minimizes PCB area and assembly cost versus larger packages like SOIC-8 or SC-70 |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Supervising 5V logic rails in programmable logic controllers exposed to wide ambient temperature swings and EMI-rich factory environments. IC Role / Device Role / Timing Role: Voltage detector providing active-high reset signal to ARM Cortex-M7 MCU upon 5V rail dip below 4.38V. Use Value: Ensures deterministic boot recovery after transient line sags, eliminating firmware lockup without adding BOM cost. | Use Scenario: Power sequencing in handheld ECG devices powered by single-cell Li-ion batteries with regulated 5V output. IC Role / Device Role / Timing Role: Monitoring the 5V supply to guarantee microcontroller reset during battery discharge below 4.4V. Use Value: Prevents corrupted memory writes or sensor misreads during low-battery operation via guaranteed 1V-valid reset assertion. |
| Smart Energy Meters | Automotive Body Control Modules |
Use Scenario: Detecting undervoltage on isolated 5V auxiliary rails in DIN-rail mounted electricity meters with long-term field deployment. IC Role / Device Role / Timing Role: Providing 50ms active-high reset pulse to secure element and metrology SoC during AC mains interruption. Use Value: Meets IEC 62053-21 reset timing requirements while consuming <10µA to extend meter battery backup life. | Use Scenario: Supervising 5V supply to LIN transceivers and microcontrollers in non-safety-critical body electronics modules. IC Role / Device Role / Timing Role: Asserting reset to Infineon AURIX TC234L when vehicle battery dips below 4.38V during cold cranking. Use Value: Avoids spurious CAN/LIN communication errors by holding MCU in reset until stable 5V is restored. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 4.63V reset threshold, 240ms timeout, 15µA supply current, same SOT23-3 package | Higher threshold better suited for 5V systems with tighter tolerance; longer timeout may delay system startup | Select if design requires higher trip point and longer reset hold time for legacy µP with slow initialization |
| TPS3808G33DBVR | 3.3V threshold, adjustable timeout (200ms–10s), 1.1µA quiescent current, SOT23-6 package | Lower threshold targets 3.3V rails; adjustable timeout adds flexibility but increases BOM count and layout complexity | Choose for ultra-low-power 3.3V systems where extended timeout configurability justifies extra pin and routing overhead |
Compared with MAX809SEUR+T and TPS3808G33DBVR, the APX810S05-44SA-7 offers optimal balance for 5V applications: precise 4.38V detection, industry-standard 50ms reset duration, lowest supply current among fixed-threshold 5V detectors, and minimal 3-pin footprint-making it ideal for space-constrained, battery-sensitive designs requiring deterministic reset behavior.
Availability
APX810S05-44SA-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 and long-term production continuity.
Supply support for APX810S05-44SA-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 APX809S/810S series belongs to Diodes' µP supervisory product line, engineered specifically for low-cost, low-power voltage monitoring in space- and energy-constrained embedded systems using standard 2.5V–5V supply rails.
FAQ
What is the exact reset threshold voltage for APX810S05-44SA-7?
The APX810S05-44SA-7 has a nominal reset threshold of 4.38V at +25°C, with guaranteed min/max values of 4.32V and 4.44V across temperature. This value is factory-trimmed and specified in the DS39140 datasheet Table 1 under VTH for APX810SXX-44 variants.
Does APX810S05-44SA-7 require an external pull-up resistor on the RESET pin?
No. The APX810S05-44SA-7 features a push-pull output stage that actively drives high (to VCC) and low (to GND). Unlike open-drain reset supervisors, it does not require an external pull-up resistor, simplifying BOM and reducing board space.
Can APX810S05-44SA-7 operate reliably at 1.2V VCC?
Yes. The device guarantees correct reset logic state and functional operation down to VCC = 1.0V, per Recommended Operating Conditions in DS39140. At 1.2V, it will assert RESET if VCC falls below 4.38V (which cannot occur), so RESET remains deasserted - but the IC remains powered and ready to respond once VCC rises above threshold.
How does the 50ms reset timeout differ from the 240ms variant in the APX810S family?
The "05" suffix denotes a 50ms typical reset timeout (20–70ms range), optimized for fast-boot µPs like Cortex-M0+. In contrast, the "-7" suffix (e.g., APX810S-44SA-7) indicates 240ms typical timeout (140–280ms), intended for legacy µCs requiring longer initialization. Both share identical threshold and electrical specs.
APX810S05-44SA-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:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX810S05-44SA-7 FAQ
1.How can I place an order for APX810S05-44SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX810S05-44SA-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 APX810S05-44SA-7 reliable?
The price and inventory of APX810S05-44SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX810S05-44SA-7 is usually 5 days.
3.What payment methods are accepted for APX810S05-44SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX810S05-44SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX810S05-44SA-7?
APX810S05-44SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX810S05-44SA-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 APX810S05-44SA-7?
For technical support, including APX810S05-44SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX810S05-44SA-7 requirements.
6.How does Aetrix verify that APX810S05-44SA-7 is sourced from the original manufacturer or authorized distributors?
All APX810S05-44SA-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 APX810S05-44SA-7 meets industry standards.
7.What is the process for return or replacement of APX810S05-44SA-7?
All APX810S05-44SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX810S05-44SA-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 APX810S05-44SA-7 part is unused and in its original packaging.
Return procedure for APX810S05-44SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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