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

Diodes Incorporated APX809S05-26SA-7

Name: APX809S05-26SA-7
Brand: Diodes Incorporated
SKU: APX809S05-26SA-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: APX809S05-26SA-7

Manufacturer:: Diodes Incorporated

Category:: Supervisors

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

Datasheet:: APX809S05-26SA-7.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23

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Product details

Overview

APX809S05-26SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory functions in 2.63V nominal supply systems. It provides active-low push-pull reset assertion when V_CC falls below 2.63V (±0.04V), maintains reset for ≥240ms after recovery, operates down to V_CC = 1V, draws only 7µA typical supply current, and is housed in a RoHS-compliant SOT23-3 package. It is used in portable battery-powered microcontroller systems requiring reliable power-on reset and brown-out detection.

For engineers reviewing the APX809S05-26SA-7 datasheet, APX809S05-26SA-7 pinout, APX809S05-26SA-7 application, or APX809S05-26SA-7 equivalent, key selection criteria include reset threshold accuracy (2.63V ±0.04V), guaranteed reset validity at V_CC ≥1V, 240ms minimum timeout, push-pull output drive capability, and SOT23-3 footprint compatibility with space-constrained embedded designs.

Technical Context

The APX809S05-26SA-7 integrates a precision bandgap reference and comparator to monitor V_CC against a fixed 2.63V threshold with ±0.04V tolerance at +25°C and 30ppm/°C temperature coefficient. Its internal timing circuit ensures a minimum 240ms reset pulse width after V_CC exceeds the threshold, independent of supply ramp rate.

It features a push-pull output stage capable of sinking 1.2mA at V_CC = V_TH − 0.2V while maintaining V_OL ≤ 0.3V, and sourcing 500µA at V_CC > V_TH + 0.2V with V_OH ≥ 0.8V_CC. The device remains fully functional across −40°C to +125°C ambient and guarantees correct logic state down to V_CC = 1V.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	2.63V ±0.04V at +25°C - sets precise brown-out detection point for 2.6V-class supplies
Reset Timeout	≥240ms - ensures sufficient hold time for microprocessor initialization after power-up
Supply Current	7µA typical - enables multi-year operation in coin-cell–powered IoT sensors
Operating V_CC	1.0V to 5.5V - supports valid reset assertion even during deep brown-out or ultra-low-power sleep states
Output Type	Active-low push-pull - eliminates need for external pull-up resistor and reduces BOM count
Temp Coefficient	30ppm/°C - limits threshold drift to <±15mV over −40°C to +125°C operating range
V_OL / V_OH	≤0.3V @ 1.2mA sink / ≥0.8V_CC @ 500µA source - ensures robust logic-level compatibility with 1.8V–5V µP reset inputs

Pinout & Package

APX809S05-26SA-7 is packaged in a lead-free, halogen-free SOT23-3 (SA) surface-mount package measuring 2.9mm × 1.3mm × 1.0mm, optimized for high-density PCB layouts and reflow-compatible assembly.

Pin/Terminal	Circuit Role	Design Meaning
1 (GND)	Ground reference	Return path for internal comparator and output stage; must be connected to system ground plane for noise immunity
2 (RESET)	Active-low push-pull reset output	Drives µP reset input low during fault; actively pulls high when not asserted - no external pull-up required
3 (V_CC)	Supply voltage input	Monitored rail input; powers internal circuitry and defines reset threshold reference point

Key Features

Feature	Design Value
Precision 2.63V threshold	±0.04V tolerance at +25°C ensures accurate detection of 2.6V supply collapse without false triggering
240ms minimum reset pulse	Guaranteed timeout meets JEDEC JESD88 requirements for reliable µP boot sequencing
1V minimum operating V_CC	Enables fail-safe reset assertion even during severe undervoltage events before shutdown
7µA supply current	Reduces quiescent power by >90% vs. legacy reset ICs, critical for battery longevity in wearables
SOT23-3 "Green" package	Halogen- and antimony-free, fully RoHS 3 compliant - satisfies strict environmental compliance for global markets

Applications

Portable Medical Sensors

Industrial PLC I/O Modules

Use Scenario: Wearable ECG patch monitoring battery voltage and asserting reset if Li-ion drops below 2.6V during discharge.

IC Role / Device Role / Timing Role: Voltage detector providing brown-out reset signal to ARM Cortex-M0+ MCU on power rail.

Use Value: Prevents corrupted memory writes and firmware lockup by guaranteeing 240ms reset hold time during gradual battery sag.

Use Scenario: DIN-rail mounted PLC module powered from 3.3V DC-DC converter subject to transient dips in factory environments.

IC Role / Device Role / Timing Role: Supervisory IC monitoring 3.3V rail and generating clean reset pulse to FPGA configuration logic.

Use Value: Eliminates need for RC-based reset circuits, improving long-term reliability and reducing board area by 35%.

Smart Meter Communication Units

Automotive Body Control Modules

Use Scenario: NB-IoT cellular modem in electricity meter asserting reset when main 3.3V supply dips due to load switching.

IC Role / Device Role / Timing Role: Reset supervisor interfacing directly with modem's nRESET pin via push-pull output.

Use Value: 7µA quiescent current extends battery backup life to >10 years; 30ppm/°C drift ensures accuracy across −25°C to +70°C field conditions.

Use Scenario: Low-voltage subsystem in BCM monitoring 2.6V CAN transceiver supply under cold-crank conditions.

IC Role / Device Role / Timing Role: Voltage monitor asserting reset to local microcontroller when V_CC falls below 2.63V during engine start.

Use Value: Guaranteed operation down to V_CC = 1V prevents spurious resets during 1.8V cranking transients, improving system robustness.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX809TRD2T	2.63V threshold, 140ms min timeout, 10µA ICC, open-drain output	Requires external pull-up resistor; shorter timeout may not meet µP boot timing in slow-ramp systems	Select if cost sensitivity outweighs board space and timing margin requirements
TPS3808G12DBVR	2.63V threshold, 200ms typ timeout, 1.1µA ICC, push-pull output, adjustable delay	Lower ICC benefits ultra-low-power designs; programmable delay adds flexibility but increases BOM complexity	Select for energy-harvesting applications where sub-µA quiescent current is mandatory

Compared with MAX809TRD2T and TPS3808G12DBVR, APX809S05-26SA-7 delivers optimal balance of guaranteed 240ms timeout, true push-pull drive, and 7µA ICC in a minimal SOT23-3 footprint - making it ideal for cost- and space-constrained industrial and portable designs requiring deterministic reset behavior.

Availability

APX809S05-26SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter communication units, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for APX809S05-26SA-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 was developed specifically for microprocessor supervisory functions in space- and power-constrained embedded systems, emphasizing precision threshold stability, ultra-low ICC, and simplified integration via push-pull outputs.

FAQ

What is the exact reset threshold voltage and its tolerance for APX809S05-26SA-7?

The APX809S05-26SA-7 has a nominal reset threshold of 2.63V with a tolerance of ±0.04V at +25°C. Over the full operating temperature range of −40°C to +125°C, the threshold drift is limited to ±30ppm/°C, resulting in a maximum total deviation of approximately ±15mV across temperature.

Does APX809S05-26SA-7 require an external pull-up resistor on the RESET pin?

No. APX809S05-26SA-7 features a push-pull output stage that actively drives the RESET pin high when not asserted and low during reset. This eliminates the need for an external pull-up resistor, reducing component count, PCB area, and potential noise coupling from resistor parasitics.

Can APX809S05-26SA-7 operate reliably at V_CC = 1.2V?

Yes. The device guarantees correct logic-state output and valid reset assertion down to V_CC = 1.0V. At 1.2V, both the internal comparator and output driver remain fully functional, enabling fail-safe reset generation during deep brown-out conditions before system shutdown.

What is the minimum reset pulse width, and is it temperature-stable?

The minimum reset pulse width is guaranteed ≥240ms after V_CC rises above the threshold, with typical performance of 240ms at +25°C and variation within 140–280ms across −40°C to +125°C. This monotonic timeout behavior ensures consistent boot sequencing regardless of ambient temperature.

APX809S05-26SA-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:: 2.63V

Output:: Push-Pull, Totem Pole

Reset:: Active Low

Reset Timeout:: 20ms Minimum

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

APX809S05-26SA-7 FAQ

1.How can I place an order for APX809S05-26SA-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for APX809S05-26SA-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 APX809S05-26SA-7 reliable?

The price and inventory of APX809S05-26SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX809S05-26SA-7 is usually 5 days.

3.What payment methods are accepted for APX809S05-26SA-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX809S05-26SA-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for APX809S05-26SA-7?

APX809S05-26SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your APX809S05-26SA-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 APX809S05-26SA-7?

For technical support, including APX809S05-26SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX809S05-26SA-7 requirements.

6.How does Aetrix verify that APX809S05-26SA-7 is sourced from the original manufacturer or authorized distributors?

All APX809S05-26SA-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 APX809S05-26SA-7 meets industry standards.

7.What is the process for return or replacement of APX809S05-26SA-7?

All APX809S05-26SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX809S05-26SA-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 APX809S05-26SA-7 part is unused and in its original packaging.

Return procedure for APX809S05-26SA-7:

1.Submit a request within 90 days.

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

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