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

Diodes Incorporated APX824-46W5G-7

Name: APX824-46W5G-7
Brand: Diodes Incorporated
SKU: APX824-46W5G-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: APX824-46W5G-7

Manufacturer:: Diodes Incorporated

Category:: Supervisors

Package:: SC-74A, SOT-753

Datasheet:: APX824-46W5G-7.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT25

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Product details

Overview

APX824-46W5G-7 from Diodes Incorporated is a fixed-threshold processor supervisory IC with active-high reset output, 4.63V negative-going supply voltage detection (V_TH-), 200ms typical reset delay (t_d), 1.6s watchdog timeout (t_tout), and SOT25-5 package. It monitors V_CC in DSP/microprocessor systems, asserts RESET when V_CC drops below threshold or watchdog expires, and requires no external components.

For engineers reviewing the APX824-46W5G-7 datasheet, APX824-46W5G-7 pinout, APX824-46W5G-7 application, or APX824-46W5G-7 equivalent, key selection criteria include its 4.63V supervision threshold, active-high RESET output, integrated watchdog timer with 1.12–2.4s timeout range, manual reset absence (distinguishing it from APX823/APX825A), and -40°C to +85°C operating range.

Technical Context

The APX824-46W5G-7 implements a precision bandgap-based voltage reference for stable 4.63V (±30mV) threshold detection with 50mV hysteresis, ensuring immunity to supply noise during power-up/down transitions. Its internal RC timer generates a fixed 140–280ms reset pulse width after V_CC exceeds V_TH-, independent of external capacitance.

Watchdog supervision operates on edge-triggered WDI input: any rising or falling transition reinitializes the 1.12–2.4s timeout window; unconnected WDI disables watchdog functionality. The device lacks MR input-unlike APX823/APX825A-making it suitable for systems requiring only power-supply and watchdog monitoring without manual intervention.

Key Specifications

Parameter	Value and Actual Design Meaning
V_TH- Threshold	4.63V ±30mV at TA=25°C; ensures reliable reset assertion when 5V rail dips below safe operating level
Reset Delay t_d	200ms typical; guarantees sufficient hold time for microprocessor initialization before release
Watchdog Timeout t_tout	1.6s typical; provides fail-safe recovery window for firmware lockup detection
Supply Current I_CC	30μA typical at V_CC=V_TH-+0.2V; enables low-power operation in battery-backed systems
Output Type	Active-high RESET; directly interfaces with processors requiring high-level reset assertion
Operating Temp	-40°C to +85°C; supports industrial-grade embedded applications without derating
ESD Rating	5kV HBM; protects against handling-induced electrostatic discharge during assembly

Pinout & Package

SOT25-5 surface-mount package (3.0×2.8×1.3mm body, 0.95mm pitch), RoHS-compliant matte tin plating, moisture sensitivity level 3 per J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1 (V_CC)	Power supply input	Accepts 1.1V–5.5V DC; powers internal reference, timer, and output driver
2 (GND)	Ground reference	Return path for all internal circuits; must be low-impedance connection to system ground plane
3 (RESET)	Active-high reset output	Drives high (≥0.8×V_CC) when V_CC ≥ V_TH- and watchdog not triggered; sinks 3mA max
4 (WDI)	Watchdog input	Edge-sensitive trigger; rising/falling transitions reset timeout counter; floating = watchdog disabled
5 (NC)	No connect	Internally unused pin; must remain unconnected per datasheet to avoid malfunction

Key Features

Feature	Design Value
Fixed 4.63V supervision threshold	Eliminates need for external resistor divider; ensures consistent reset point across temperature (-40°C to +85°C)
200ms factory-trimmed reset delay	Guarantees deterministic timing without capacitor tolerance drift or aging effects
Edge-triggered watchdog timer	Supports both rising and falling edges on WDI; simplifies firmware integration versus level-sensitive designs
30μA ultra-low quiescent current	Reduces standby power in always-on systems; extends battery life in portable equipment
Active-high RESET output	Directly drives reset inputs of modern MCUs/MPUs without external inverter logic

Applications

Industrial PLC Controllers

Wireless Baseband Processors

Use Scenario: Real-time control logic in programmable logic controllers where unexpected power sags or firmware hangs must trigger immediate system reset.

IC Role / Device Role / Timing Role: Voltage supervisor and watchdog monitor; asserts active-high RESET within 25μs of V_CC drop below 4.63V or WDI timeout expiration.

Use Value: Prevents corrupted I/O states by enforcing clean restart before control loop execution resumes.

Use Scenario: Power management in LTE/5G baseband SoCs where RF subsystem stability depends on deterministic boot sequencing.

IC Role / Device Role / Timing Role: Primary reset generator with 200ms delay and 1.6s watchdog; coordinates power-rail sequencing with SoC reset controller.

Use Value: Eliminates need for discrete RC reset networks, reducing BOM count and board space while improving timing accuracy.

Notebook System Management

Smart Energy Meters

Use Scenario: Embedded controller supervision in laptop EC firmware, monitoring main 5V rail and detecting host CPU hang conditions.

IC Role / Device Role / Timing Role: Dual-function supervisor: power-on reset generator (200ms delay) and watchdog timer (1.6s timeout) with active-high output compatible with Intel PCH reset requirements.

Use Value: Enables reliable recovery from BIOS corruption or thermal shutdown events without requiring motherboard-level reset circuit redesign.

Use Scenario: Tamper-resistant metering platforms where sustained power interruption or software fault must force secure reboot.

IC Role / Device Role / Timing Role: Critical safety monitor asserting RESET on 5V rail collapse or missed WDI pulse; operates over full industrial temperature range (-40°C to +85°C).

Use Value: Meets IEC 62056-21 compliance for reset reliability under brownout conditions and electromagnetic interference.

Equivalent & Alternatives

The following parts are listed as comparable options for similar processor supervision applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
APX824-44W5G-7	4.38V supervision threshold (vs. 4.63V); identical timing, package, and features	Targeted at 4.5V nominal rails instead of 5V; lower threshold increases noise margin but reduces headroom	Select when system V_CC nominal is 4.5V and tighter brownout detection is required
APX825A-46W6G-7	SOT26-6 package (adds MR pin); same 4.63V threshold and timing specs	Enables manual reset capability via MR input; requires different PCB footprint and layout	Choose if hardware-initiated reset (e.g., front-panel button) is needed alongside power/watchdog supervision

Compared with APX824-46W5G-7, the -44 variant offers earlier reset assertion for 4.5V systems, while the -46W6G-7 adds manual reset flexibility at the cost of larger footprint and additional routing-neither is pin-compatible, requiring board revision for substitution.

Availability

APX824-46W5G-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, wireless baseband processors, and notebook system management requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for APX824-46W5G-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 semiconductor company specializing in discrete, analog, and mixed-signal devices, with design centers across Asia, Europe, and the US, serving industrial, computing, and communications markets.

The APX82x family belongs to Diodes' processor supervisory IC product line, engineered specifically for deterministic power-on reset generation, supply voltage monitoring, and watchdog protection in DSP, MCU, and MPU-based systems operating from 2.5V to 5V rails.

FAQ

What is the function of Pin 5 (NC) on APX824-46W5G-7?

Pin 5 is a no-connect terminal with no internal connection. It must remain unconnected in the PCB layout per the datasheet; soldering or routing to this pin may cause unpredictable behavior or damage. This distinguishes APX824 from APX825A, which uses Pin 5 for MR functionality in the SOT26 package.

Can APX824-46W5G-7 be used with a 3.3V supply rail?

No-APX824-46W5G-7 is specified for 4.63V threshold operation and requires V_CC ≥ 1.1V to enable reset functionality, but its V_TH- is optimized for 5V systems. Using it on 3.3V would result in permanent RESET assertion since V_CC never reaches the 4.63V threshold; select APX824-31W5G-7 (3.08V) or APX824-29W5G-7 (2.93V) instead.

How does the watchdog timer respond to WDI signal transitions?

The watchdog timer resets on every rising or falling edge at WDI-no specific pulse width or duty cycle is required. A single transition suffices to restart the 1.12–2.4s timeout window. If WDI remains static (high or low), the timer expires and forces RESET assertion; leaving WDI unconnected disables watchdog entirely.

Is APX824-46W5G-7 qualified for automotive applications?

No-APX824-46W5G-7 is characterized for -40°C to +85°C operation and is not AEC-Q100 qualified. For automotive use, Diodes offers separate AEC-Q100 grade versions (e.g., APX824Q series) with extended temperature range (-40°C to +125°C), PPAP documentation, and IATF 16949 manufacturing certification.

APX824-46W5G-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SC-74A, SOT-753

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 4.63V

Output:: Push-Pull, Totem Pole

Reset:: Active High/Active Low

Reset Timeout:: 140ms Minimum

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-25

APX824-46W5G-7 FAQ

1.How can I place an order for APX824-46W5G-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for APX824-46W5G-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 APX824-46W5G-7 reliable?

The price and inventory of APX824-46W5G-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX824-46W5G-7 is usually 5 days.

3.What payment methods are accepted for APX824-46W5G-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX824-46W5G-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for APX824-46W5G-7?

APX824-46W5G-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your APX824-46W5G-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 APX824-46W5G-7?

For technical support, including APX824-46W5G-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX824-46W5G-7 requirements.

6.How does Aetrix verify that APX824-46W5G-7 is sourced from the original manufacturer or authorized distributors?

All APX824-46W5G-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 APX824-46W5G-7 meets industry standards.

7.What is the process for return or replacement of APX824-46W5G-7?

All APX824-46W5G-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX824-46W5G-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 APX824-46W5G-7 part is unused and in its original packaging.

Return procedure for APX824-46W5G-7:

1.Submit a request within 90 days.

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

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