My Inquiry
My Account
Diodes Incorporated APX824-26W5G-7
- Part No.:
- APX824-26W5G-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
APX824-26W5G-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:880
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
APX824-26W5G-7 from Diodes Incorporated is a fixed-threshold processor supervisory circuit with active-high reset output, 2.63 V supply voltage supervision, 200 ms power-on reset delay, and integrated watchdog timer. It monitors VCC in DSP/microprocessor systems, asserts RESET during brownout or startup, and supports manual reset triggering via WDI transitions. Used in industrial controllers and portable embedded systems requiring reliable power sequencing.
For engineers reviewing the APX824-26W5G-7 datasheet, APX824-26W5G-7 pinout, APX824-26W5G-7 application, or APX824-26W5G-7 equivalent, key selection criteria include its 2.63 V threshold accuracy (±30 mV), 1.6 s watchdog timeout, SOT25 package footprint, and compatibility with 2.5–5.5 V supply rails in temperature-critical environments.
Technical Context
The APX824-26W5G-7 implements a precision bandgap-based voltage reference to generate a stable 2.63 V negative-going threshold (VTH−) with 50 mV hysteresis, ensuring immunity to supply noise during VCC transitions. Its internal RC timing network sets a typ. 200 ms reset delay (td) after VCC exceeds VTH−, guaranteeing full system initialization before release.
Watchdog functionality responds to edge-triggered transitions on WDI - either rising or falling - with a 1.12–2.4 s timeout window (ttout = 1.6 s typ.). The active-high RESET output drives loads up to 150 μA at VOH ≥ 0.8×VCC, while sinking 3 mA at VOL ≤ 0.4 V for robust interface compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63 V (VTH−), ±30 mV over −40°C to +85°C - ensures accurate brownout detection at nominal 2.5 V/3.3 V rails |
| Reset Delay Time | 200 ms typ., 140–280 ms range - guarantees sufficient processor core and peripheral initialization time |
| Watchdog Timeout | 1.6 s typ., 1.12–2.4 s range - provides fail-safe recovery window for firmware lockup in real-time control loops |
| Supply Current | 30 μA typ., 40 μA max at VCC = VTH−+0.2 V - enables ultra-low-power operation in battery-backed systems |
| Operating Voltage | 1.1–5.5 V - supports direct integration with 2.5 V, 3.3 V, and 5 V logic domains without external regulators |
| Output Type | Active-high RESET - simplifies interface with microcontrollers requiring high-valid reset assertion (e.g., ARM Cortex-M series) |
| Temperature Range | −40°C to +85°C - validated for industrial-grade reliability in uncontrolled ambient environments |
Pinout & Package
SOT25-5 package: 2.8 mm × 2.9 mm × 1.3 mm body, 0.95 mm pitch, matte tin-plated leads, moisture sensitivity level 3 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Positive supply input | Accepts 1.1–5.5 V; powers internal reference, timer, and output driver; requires 0.1 μF ceramic bypass capacitor |
| 2 - GND | Ground reference | Return path for all internal circuits; must be low-impedance connection to minimize noise coupling into threshold comparator |
| 3 - RESET | Active-high reset output | Drives high when VCC > VTH− + delay; sinks 3 mA min at VOL ≤ 0.4 V; compatible with standard CMOS input thresholds |
| 4 - WDI | Watchdog input | Edge-sensitive (rising/falling); re-triggers watchdog timer; left floating disables watchdog function |
| 5 - NC | No connect | Internally unused terminal; must remain unconnected per datasheet - no routing or grounding permitted |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.63 V supervision threshold | Factory-trimmed internal resistor divider eliminates external component dependency and calibration effort |
| 200 ms power-on reset delay | Monolithic RC timing ensures consistent release timing across voltage and temperature without external capacitor |
| Edge-triggered watchdog timer | Supports both rising and falling edges on WDI - accommodates diverse MCU GPIO configurations without signal inversion |
| Active-high RESET output | Directly interfaces with processors requiring high-valid reset (e.g., STM32, NXP Kinetis), reducing board-level logic |
| 30 μA typical supply current | Enables use in always-on subsystems (e.g., RTC backup domain monitoring) without compromising battery life |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Power-up sequencing and runtime fault detection in programmable logic controllers operating in factory-floor environments with fluctuating 24 V DC supplies stepped down to 3.3 V. IC Role / Device Role / Timing Role: Supervises 3.3 V rail, asserts RESET during undervoltage events, and triggers watchdog recovery if main controller firmware hangs during analog I/O sampling. Use Value: Prevents spurious relay actuation or sensor data corruption by enforcing deterministic reset behavior aligned with IEC 61131-2 timing requirements. |
Use Scenario: Battery-powered ECG and SpO₂ monitors requiring guaranteed boot integrity and low-power sleep-mode supervision. IC Role / Device Role / Timing Role: Monitors 2.5 V LDO output powering the MCU and analog front-end; maintains RESET until stable VCC and clears it only after 200 ms delay to allow ADC reference settling. Use Value: Eliminates need for discrete RC reset networks and reduces BOM count while meeting ISO 13485 design control traceability for Class II medical devices. |
| Wireless Sensor Nodes | Embedded HMI Panels |
Use Scenario: Sub-GHz LoRaWAN nodes powered by coin-cell batteries or energy harvesters with highly variable input voltage profiles. IC Role / Device Role / Timing Role: Detects VCC drop below 2.63 V during RF transmission bursts and initiates controlled shutdown via active-high RESET to preserve flash memory integrity. Use Value: Enables reliable brownout recovery without external supervisor ICs, reducing PCB area by 30% versus discrete solutions. |
Use Scenario: Touchscreen-based human-machine interface panels in HVAC control cabinets exposed to thermal cycling between −25°C and +70°C. IC Role / Device Role / Timing Role: Provides cold-start reset at power application and continuous watchdog supervision of display controller firmware executing GUI rendering tasks. Use Value: Guarantees display initialization completes before touch driver loads, preventing unresponsive UI during field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar processor supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT26+T | 2.63 V threshold, 200 ms delay, SOT23-5, but lacks watchdog timer and manual reset input | Requires external watchdog circuitry for safety-critical reboot; limited to basic power-on reset only | Select when watchdog functionality is unnecessary and footprint compatibility with legacy MAX63xx designs is required |
| TPS3808G33DBVR | 3.3 V threshold, 200 ms delay, SOT23-6, includes watchdog and manual reset, but higher 12 μA quiescent current | Not suitable for 2.63 V rail supervision; requires level-shifting for 2.5 V systems | Choose only if system uses 3.3 V supply and TI ecosystem integration (e.g., with TPS6598x PMICs) is prioritized |
Compared with MAX6326UT26+T and TPS3808G33DBVR, APX824-26W5G-7 uniquely delivers 2.63 V supervision, integrated watchdog, and active-high reset in a 5-pin SOT25 - enabling single-chip solution for 2.5 V/3.3 V industrial microcontrollers without redesigning power tree or adding discrete timers.
Availability
APX824-26W5G-7 is available at Aetrix Electronics and suitable for industrial automation, portable medical instrumentation, wireless sensor networks, and embedded HMI panels requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for APX824-26W5G-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 manufacturer specializing in discrete, analog, and mixed-signal components for industrial, computing, and consumer markets, with ISO/TS 16949-certified manufacturing.
The APX82x family targets cost-sensitive, space-constrained embedded systems needing reliable, zero-component supervision - designed specifically for DSP, MCU, and FPGA power sequencing in non-automotive industrial applications.
FAQ
What is the function of the NC pin (Pin 5) on APX824-26W5G-7?
Pin 5 is a no-connect terminal with no internal connection. It must remain unconnected - neither routed nor grounded - as specified in the Diodes datasheet DS31323 Rev. 5-2. Connecting or loading this pin may cause unpredictable behavior or violate absolute maximum ratings due to potential internal parasitic coupling.
Can APX824-26W5G-7 supervise a 2.5 V rail despite its 2.63 V threshold?
Yes. The device asserts RESET when VCC falls below 2.63 V, providing 130 mV of margin above the 2.5 V nominal rail. This ensures robust brownout detection before the microcontroller's minimum operating voltage (typically 2.4 V) is reached, preventing undefined state execution.
How does the watchdog timer respond to WDI signal transitions?
The watchdog resets its internal timer on every rising or falling edge at WDI. If no transition occurs within 1.12–2.4 s (1.6 s typ.), RESET goes high for 200 ms. Leaving WDI open disables watchdog functionality entirely - no pull-up or pull-down is required.
Is APX824-26W5G-7 qualified for automotive applications?
No. While rated for −40°C to +85°C, APX824-26W5G-7 is not AEC-Q100 qualified and lacks PPAP documentation or IATF 16949 manufacturing certification. Diodes offers separate APX82x-AQ variants for automotive use; this part is intended for industrial and commercial applications only.
APX824-26W5G-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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 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
APX824-26W5G-7 FAQ
1.How can I place an order for APX824-26W5G-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX824-26W5G-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 APX824-26W5G-7 reliable?
The price and inventory of APX824-26W5G-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX824-26W5G-7 is usually 5 days.
3.What payment methods are accepted for APX824-26W5G-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX824-26W5G-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX824-26W5G-7?
APX824-26W5G-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX824-26W5G-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 APX824-26W5G-7?
For technical support, including APX824-26W5G-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX824-26W5G-7 requirements.
6.How does Aetrix verify that APX824-26W5G-7 is sourced from the original manufacturer or authorized distributors?
All APX824-26W5G-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 APX824-26W5G-7 meets industry standards.
7.What is the process for return or replacement of APX824-26W5G-7?
All APX824-26W5G-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX824-26W5G-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 APX824-26W5G-7 part is unused and in its original packaging.
Return procedure for APX824-26W5G-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX824-26W5G-7 Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
