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

Diodes Incorporated APX810-40SAG-7

Name: APX810-40SAG-7
Brand: Diodes Incorporated
SKU: APX810-40SAG-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: APX810-40SAG-7

Manufacturer:: Diodes Incorporated

Category:: Supervisors

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

Datasheet:: APX810-40SAG-7.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-3

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Product details

Overview

APX810-40SAG-7 from Diodes Incorporated is a 3-pin SOT23 microprocessor supervisory IC with active-high push-pull RESET output, 4.00 V ±0.08 V reset threshold, 200 ms typical reset timeout, 30 µA typical supply current, and guaranteed operation down to VCC = 1 V. It monitors 5 V or 4.5 V nominal power rails in embedded controllers and portable systems to prevent erroneous code execution during brownout.

For engineers reviewing the APX810-40SAG-7 datasheet, APX810-40SAG-7 pinout, APX810-40SAG-7 application, or APX810-40SAG-7 equivalent, key selection criteria include reset threshold accuracy (±0.08 V), active-high push-pull drive capability, low quiescent current for battery operation, and validated SOT23 thermal performance up to +105°C junction temperature.

Technical Context

The APX810-40SAG-7 implements a precision voltage comparator with internal reference and fixed-delay timer to generate a clean, glitch-immune reset pulse. Its reset assertion is triggered when VCC falls below 4.00 V and held active for ≥140 ms after VCC rises above threshold, with typical timeout at 200 ms across -40°C to +85°C ambient.

Designed for direct connection to microcontroller reset inputs, it features push-pull output stage eliminating external pull-up resistors, operates reliably with VCC as low as 1.1 V, and rejects fast transients on VCC via built-in noise immunity circuitry - all without requiring external components or trimming.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	4.00 V ±0.08 V at TA = -40°C to +85°C - ensures reliable reset assertion before 5 V rail drops below 4.0 V nominal operating margin
Reset Timeout	140–280 ms - guarantees minimum 140 ms reset hold time after VCC recovery, sufficient for µP initialization sequences
Supply Current	30 µA typical at +25°C - enables multi-year battery life in portable instrumentation and remote sensors
Output Type	Push-pull active-high - drives RESET high without external pull-up, compatible with CMOS logic inputs requiring >0.8×VCC high-level
VCC Operating Range	1.1 V to 5.5 V - supports valid reset signaling even during deep brownout conditions down to 1.1 V supply
Reset Validity	Guaranteed to VCC = 1 V - ensures defined logic state on RESET pin until supply collapses below 1 V
ESD Protection	5 kV HBM - provides robust handling in automated assembly and field service environments

Pinout & Package

SOT23-3 (SA package) surface-mount package with 201°C/W junction-to-ambient thermal resistance, green molding compound, lead-free and RoHS-compliant construction.

Pin/Terminal	Circuit Role	Design Meaning
1 (VCC)	Supply Input	Accepts 1.1–5.5 V DC input; powers internal comparator and timer; must be decoupled locally
2 (GND)	Ground Reference	System ground return path for internal circuitry and output driver; requires low-impedance PCB connection
3 (RESET)	Active-High Reset Output	Push-pull CMOS output asserting logic HIGH when VCC ≥ 4.00 V; sinks ≤0.4 V at 3.2 mA load

Key Features

Feature	Design Value
Precision reset threshold	±0.08 V tolerance over full temperature range - eliminates need for system-level calibration or margining
No external components required	Self-contained comparator, reference, and timer - reduces BOM count and PCB area vs. discrete reset solutions
Push-pull active-high output	Drives RESET directly to VCC without pull-up resistor - simplifies interface to modern µP reset pins with weak internal pull-down
Low supply current	30 µA typical - extends battery runtime in always-on monitoring applications such as smart meters and IoT edge nodes
Valid reset down to VCC = 1 V	Ensures deterministic logic state on RESET pin until supply collapses - prevents metastability in critical power-down sequencing

Applications

Industrial Controllers

Portable Medical Sensors

Use Scenario: PLC I/O modules powered from 5 V regulated rails in factory automation cabinets subject to voltage sags during motor switching.

IC Role / Device Role / Timing Role: Monitors 5 V supply and asserts active-high RESET to ARM Cortex-M4 microcontrollers upon drop below 4.00 V, holding for ≥140 ms post-recovery.

Use Value: Prevents firmware lockup or register corruption during transient brownouts, enabling automatic recovery without manual reset.

Use Scenario: Battery-powered glucose monitors using coin-cell batteries whose voltage declines from 3.0 V to 2.2 V over service life.

IC Role / Device Role / Timing Role: Supervises 3.3 V LDO output derived from battery; triggers reset when LDO input sags, ensuring µC restarts only when stable supply returns.

Use Value: Eliminates false wakeups and erratic sensor readings caused by marginal supply conditions during battery depletion.

Network Edge Routers

Smart Energy Meters

Use Scenario: Dual-rail 5 V/3.3 V power domains in residential gateways where PoE-derived 5 V may dip during surge events.

IC Role / Device Role / Timing Role: Resets Ethernet PHY and Wi-Fi SoC simultaneously via shared active-high RESET net when primary 5 V rail falls below 4.00 V.

Use Value: Synchronizes recovery of communication subsystems to avoid protocol handshake failures after power disturbance.

Use Scenario: AMI (Advanced Metering Infrastructure) meters deployed in utility substations with unregulated AC-DC supplies prone to line dips.

IC Role / Device Role / Timing Role: Provides fail-safe reset to metrology SoC and secure element when 5 V auxiliary rail drops below threshold during grid instability.

Use Value: Maintains data integrity and cryptographic key protection by forcing controlled reboot before corrupted memory writes occur.

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor supervisory applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX809SEUR+T	4.00 V threshold, open-drain active-low output, 14 µA supply current, SOT23-3	Requires external pull-up resistor; incompatible with µP reset pins expecting active-high assertion	Select only if legacy design uses active-low reset architecture and board layout allows pull-up placement
TPS3808G33DBVR	3.3 V threshold, push-pull active-high, 1.1 µA supply current, adjustable delay via capacitor	Lower threshold unsuitable for 5 V systems; ultra-low current advantageous for energy harvesting designs	Prefer for new 3.3 V designs prioritizing battery life; not a functional substitute for 4.0 V monitoring

Compared with MAX809SEUR+T and TPS3808G33DBVR, the APX810-40SAG-7 uniquely delivers 4.0 V precision threshold with active-high push-pull drive in a cost-optimized SOT23-3 package - making it the only drop-in solution for brownout protection in 5 V embedded controllers requiring no external components.

Availability

APX810-40SAG-7 is available at Aetrix Electronics and suitable for industrial controllers, portable medical sensors, and smart energy meters requiring stable component supply with guaranteed long-term availability and consistent parametric performance.

Supply support for APX810-40SAG-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 APX809/810 series was designed specifically for cost-sensitive, space-constrained microprocessor supervision in battery-powered and industrial embedded systems - emphasizing precision threshold stability, zero-component integration, and extended temperature operation.

FAQ

What is the minimum VCC required for APX810-40SAG-7 to assert a valid RESET high signal?

The APX810-40SAG-7 guarantees valid RESET output down to VCC = 1 V. When VCC ≥ 4.00 V, RESET is driven high with VOH ≥ 0.8×VCC at 150 µA source current. Below 1 V, the output enters high-impedance state - but this aligns with µP inactivity at such low supply levels.

Can APX810-40SAG-7 replace APX809-40SAG-7 without hardware changes?

No. APX810-40SAG-7 has active-high RESET output, while APX809-40SAG-7 is active-low. Direct substitution would invert reset logic and cause system failure unless the host µP's reset pin is configured for active-high assertion - which is not universal.

Does APX810-40SAG-7 require an input bypass capacitor?

A 100 nF ceramic capacitor between VCC and GND is recommended per Diodes' typical application circuit, though not strictly required for basic functionality. It improves noise immunity during fast VCC transients and stabilizes internal reference voltage under dynamic load conditions.

Is APX810-40SAG-7 qualified for automotive applications?

No. The APX810-40SAG-7 is specified for industrial temperature range (-40°C to +85°C ambient), not AEC-Q100 automotive qualification. For automotive use, Diodes offers the APX810Q series with extended temperature range and PPAP documentation.

APX810-40SAG-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:: Not For New Designs

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 4V

Output:: Push-Pull, Totem Pole

Reset:: Active High

Reset Timeout:: 140ms Minimum

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

APX810-40SAG-7 FAQ

1.How can I place an order for APX810-40SAG-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for APX810-40SAG-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 APX810-40SAG-7 reliable?

The price and inventory of APX810-40SAG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX810-40SAG-7 is usually 5 days.

3.What payment methods are accepted for APX810-40SAG-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX810-40SAG-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for APX810-40SAG-7?

APX810-40SAG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your APX810-40SAG-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 APX810-40SAG-7?

For technical support, including APX810-40SAG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX810-40SAG-7 requirements.

6.How does Aetrix verify that APX810-40SAG-7 is sourced from the original manufacturer or authorized distributors?

All APX810-40SAG-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 APX810-40SAG-7 meets industry standards.

7.What is the process for return or replacement of APX810-40SAG-7?

All APX810-40SAG-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX810-40SAG-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 APX810-40SAG-7 part is unused and in its original packaging.

Return procedure for APX810-40SAG-7:

1.Submit a request within 90 days.

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

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