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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Diodes Incorporated APX810S-44SA-7

Name: APX810S-44SA-7
Brand: Diodes Incorporated
SKU: APX810S-44SA-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: APX810S-44SA-7

Manufacturer:: Diodes Incorporated

Category:: Supervisors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: APX810S-44SA-7.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23

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Product details

Overview

APX810S-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 push-pull reset assertion when VCC falls below 4.38V (typ.), maintains reset for ≥240ms after VCC recovery, and operates reliably down to VCC = 1.0V. Its 7µA supply current and SOT23-3 package make it suitable for battery-powered controllers and portable instrumentation.

For engineers reviewing the APX810S-44SA-7 datasheet, APX810S-44SA-7 pinout, APX810S-44SA-7 application, or APX810S-44SA-7 equivalent, key selection criteria include reset threshold accuracy (±0.06V), guaranteed operation at 1V supply, temperature-stable 30ppm/°C threshold drift, and compatibility with +5V logic interfaces requiring clean power-on reset sequencing.

Technical Context

The APX810S-44SA-7 integrates a precision bandgap reference, comparator, and push-pull output stage in a single monolithic IC. Its reset threshold is trimmed to 4.38V (typ.) with ±3% tolerance over -40°C to +125°C, and its internal delay circuit ensures minimum 240ms reset pulse width after VCC exceeds VTH.

No external components are required: the device asserts RESET high upon VCC drop below VTH and holds it until VCC rises ≥1.02×VTH and remains stable for tDELAY. Fast transient immunity on VCC is achieved via internal filtering, and output logic states are guaranteed valid for VCC ≥1.0V.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	4.38V (typ.), 4.32–4.44V (min–max); enables reliable supervision of +5V rails with margin against brownout.
Supply Current	7µA (typ.), ≤16µA (max); supports multi-year battery life in always-on portable devices.
Reset Pulse Width	240ms (typ.), 140–280ms (min–max); satisfies µP reset timing requirements per Intel/ARM specifications.
Operating Voltage Range	1.0V to 5.5V; ensures valid reset state even during deep brownout or partial power-up sequences.
Output Type	Push-pull active-high RESET; eliminates need for external pull-up resistor and reduces BOM count.
Temp. Coefficient	30ppm/°C; limits threshold drift to <±15mV across full -40°C to +125°C industrial range.
V_OH / V_OL	V_OH ≥0.8V_CC @ 500µA source; V_OL ≤0.3V @ 1.2mA sink - ensures TTL/CMOS logic compatibility.

Pinout & Package

SOT23-3 (SA) package: 1.30mm × 2.40mm × 0.915mm body, 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 pull-up or level-shifting.
3	V_CC	Power supply input; monitors system VCC rail; internally powers all circuitry including reference and comparator.

Key Features

Feature	Design Value
Precision 4.38V threshold	Factory-trimmed to ±3% over temperature; eliminates manual calibration and external resistor dividers.
1V minimum operating voltage	Guarantees valid RESET assertion and deassertion down to V_CC = 1.0V - critical for low-voltage brownout detection.
240ms typ. reset timeout	Internally timed delay ensures µP completes internal initialization before release from reset.
7µA ultra-low quiescent current	Reduces standby power in battery-backed systems; enables >10-year shelf life in coin-cell applications.
Push-pull active-high output	Direct interface to modern µP /RESET pins; avoids weak pull-ups that increase noise susceptibility and EMI.

Applications

Industrial PLC Controllers

USB-C Power Delivery Modules

Use Scenario: Supervising 5V auxiliary power rail in programmable logic controller I/O modules during AC mains interruption.

IC Role / Device Role / Timing Role: Voltage detector asserting active-high reset to ARM Cortex-M7 MCU upon 5V rail sag below 4.38V.

Use Value: Prevents firmware corruption by holding MCU in reset until 5V rail stabilizes for ≥240ms post-recovery.

Use Scenario: Monitoring VBUS presence and stability in USB-C PD sink designs before enabling power path FETs.

IC Role / Device Role / Timing Role: Reset supervisor ensuring PD controller initializes only after clean 5V VBUS establishment.

Use Value: Eliminates race conditions between PD policy engine startup and power delivery negotiation sequence.

Medical Handheld Diagnostics

Smart Energy Meters

Use Scenario: Ensuring reliable boot of low-power MCU in battery-operated glucose meters during cold-temperature battery discharge.

IC Role / Device Role / Timing Role: Brownout detector maintaining reset until 5V LDO output reaches 4.38V with 240ms hysteresis.

Use Value: Guarantees EEPROM write integrity and sensor calibration persistence across wide temperature (-20°C to +60°C).

Use Scenario: Supervising 5V DC-DC output powering metrology SoC and RTC in utility-grade electricity meters.

IC Role / Device Role / Timing Role: Precision reset generator synchronizing SoC reset with stable 5V rail after power restoration events.

Use Value: Meets IEC 62056-21 reset timing compliance by delivering ≥200ms guaranteed reset pulse width.

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX809SEUR+T	4.63V reset threshold, 140ms min reset pulse, 1.2µA I_CC, open-drain output	Requires external pull-up; better for ultra-low-power sleep modes but less robust against noise on reset line	Select when lowest possible quiescent current is prioritized over noise immunity and simplified layout
TPS3808G33DBVR	3.08V threshold, adjustable delay (1–10s), 12µA I_CC, push-pull active-high	Fixed 3.08V threshold incompatible with 5V rail supervision; requires redesign of power architecture	Not suitable for direct replacement; consider only if system redesign accommodates lower voltage monitoring

Compared with MAX809SEUR+T and TPS3808G33DBVR, the APX810S-44SA-7 uniquely combines 4.38V precision threshold, 240ms factory-fixed delay, push-pull drive, and 1V operational floor - making it optimal for cost-sensitive, space-constrained 5V µP supervision without compromise on reliability or BOM simplicity.

Availability

APX810S-44SA-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, USB-C power delivery modules, medical handheld diagnostics, and smart energy meters requiring stable component supply and long-term lifecycle support.

Supply support for APX810S-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 cost-effective, zero-component power-on reset generation in space-constrained embedded systems operating from 1.0V to 5.5V rails.

FAQ

What is the exact reset threshold voltage for APX810S-44SA-7?

The APX810S-44SA-7 has a nominal reset threshold of 4.38V, with a guaranteed range of 4.32V to 4.44V at +25°C and ±3% tolerance over -40°C to +125°C. This value is factory-trimmed and specified in the DS39140 datasheet Table 1 under "VTH APX809SXX/810SXX-44".

Does APX810S-44SA-7 require an external capacitor for reset timing?

No. The APX810S-44SA-7 uses an internal RC timing network to generate its 240ms (typ.) reset pulse width. No external capacitor or resistor is needed - this eliminates component count, board area, and timing variability due to external part tolerances.

Can APX810S-44SA-7 operate with a 3.3V supply rail?

No. With a 4.38V reset threshold, the APX810S-44SA-7 is intended for +5V systems. For 3.3V rails, Diodes offers the APX810S-31SA-7 (3.08V threshold) or APX810S-33SA-7 (3.3V variant), both in identical SOT23-3 packaging and pinout.

Is the RESET output truly push-pull, and what is its drive strength?

Yes. The RESET pin is a true push-pull output capable of sourcing ≥500µA at 0.8V_CC and sinking ≥1.2mA at ≤0.3V. This allows direct connection to µP /RESET pins without pull-up resistors and ensures fast edge rates in noisy industrial environments.

APX810S-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:: 140ms Minimum

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

APX810S-44SA-7 FAQ

1.How can I place an order for APX810S-44SA-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for APX810S-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 APX810S-44SA-7 reliable?

The price and inventory of APX810S-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 APX810S-44SA-7 is usually 5 days.

3.What payment methods are accepted for APX810S-44SA-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX810S-44SA-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for APX810S-44SA-7?

APX810S-44SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your APX810S-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 APX810S-44SA-7?

For technical support, including APX810S-44SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX810S-44SA-7 requirements.

6.How does Aetrix verify that APX810S-44SA-7 is sourced from the original manufacturer or authorized distributors?

All APX810S-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 APX810S-44SA-7 meets industry standards.

7.What is the process for return or replacement of APX810S-44SA-7?

All APX810S-44SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX810S-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 APX810S-44SA-7 part is unused and in its original packaging.

Return procedure for APX810S-44SA-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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