My Inquiry
My Account
Diodes Incorporated PT7M7825TTAEX
- Part No.:
- PT7M7825TTAEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
PT7M7825TTAEX.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,079
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PT7M7825TTAEX from Diodes Incorporated is a precision microprocessor supervisory IC with push-pull active-low RESET output, manual reset (MR) input, and watchdog timer (WDI) functionality. It monitors VCC for power-up, brownout, and power-down conditions with a 2.93V reset threshold (T suffix), asserts a guaranteed 200ms reset pulse, and operates down to 1.0V supply voltage. Used in embedded systems requiring reliable power sequencing and fault recovery.
For engineers reviewing the PT7M7825TTAEX datasheet, PT7M7825TTAEX pinout, PT7M7825TTAEX application, or PT7M7825TTAEX equivalent, this page delivers verified electrical specs, functional role in μP reset supervision, watchdog timing behavior, MR debouncing characteristics, and real-world design implications for industrial and networking equipment.
Technical Context
The PT7M7825TTAEX implements a dual-function supervisory architecture: a precision voltage monitor with ±2.5% threshold accuracy over –40°C to +85°C and a 1.6s watchdog timeout period triggered by WDI inactivity. Its internal timebase ensures deterministic reset assertion during VCC ramp-up and release after 200ms once VCC exceeds VRST.
It integrates a CMOS-compatible manual-reset input with internal 35–75kΩ pull-up resistor and supports push-pull RESET output capable of sinking 1.2mA at VCC ≥ 2.7V. The device guarantees valid RESET/RESET logic states even at VCC = 1.0V, enabling robust low-voltage system initialization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V (±2.5% over temperature); defines precise brownout detection point for 3.3V systems |
| Reset Pulse Width | 200ms (typical); ensures μP completes full reset initialization before code execution resumes |
| Watchdog Timeout | 1.6s (typical); provides sufficient margin for firmware watchdog servicing without false triggers |
| Supply Voltage Range | 1.0V to 5.5V; enables operation across wide range of logic supplies including ultra-low-power domains |
| MR Input Pull-up | 35–75kΩ (typical); eliminates need for external resistor while ensuring clean CMOS-level logic when unconnected |
| RESET Output Type | Push-pull; drives high/low actively-no external pull-up required for active-low reset signaling |
| Quiescent Current | 13µA (typical at 5V); minimizes standby power impact in battery-backed or energy-sensitive applications |
Pinout & Package
PT7M7825TTAEX is packaged in a 5-pin SOT23 (TA) surface-mount package with exposed pad for thermal performance and board space efficiency.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Primary supply rail monitored for reset assertion; valid operation starts at 1.0V |
| GND | Ground reference | Common return path for all internal circuitry and reset output sink current |
| MR | Manual reset input | Active-low CMOS input; internal pull-up allows direct push-button connection without external components |
| WDI | Watchdog input | CMOS input toggled by host processor; absence of edge for >1.6s triggers automatic reset |
| RESET | Active-low reset output | Push-pull driver; asserts low during power-up/brownout/manual reset and holds for 200ms post-recovery |
Key Features
| Feature | Design Value |
|---|---|
| Precision voltage monitoring | 2.93V threshold with ±2.5% tolerance over full industrial temperature range ensures consistent brownout response |
| Dual-trigger reset generation | Simultaneous support for power-supply monitoring, manual reset, and watchdog timeout ensures comprehensive fault coverage |
| Guaranteed low-VCC operation | RESET/RESET outputs remain valid down to VCC = 1.0V, enabling safe boot sequencing in multi-rail systems |
| Debounced manual reset | Internal MR debouncing eliminates need for external RC filtering in noisy mechanical switch environments |
| Lead-free & green compliance | Fully RoHS 3 compliant with <900ppm Br+Cl and <1000ppm Sb; suitable for automotive-qualified supply chains |
Applications
| Industrial PLC Controllers | Network Switch Power Management |
|---|---|
|
Use Scenario: Power sequencing and fault recovery in programmable logic controllers with multiple voltage rails and long uptime requirements. IC Role / Device Role / Timing Role: Primary supervisor for 3.3V core logic rail, asserting reset during AC brownouts and enabling watchdog-based firmware hang detection. Use Value: Prevents corrupted state transitions during undervoltage events and reduces MTBF by catching stuck firmware loops via 1.6s watchdog timeout. |
Use Scenario: Ensuring reliable boot and runtime stability in Layer 2/3 Ethernet switches with PoE-powered subsystems. IC Role / Device Role / Timing Role: Monitors 3.3V management controller supply and provides synchronized reset to CPU, PHY, and PMIC on power-up and brownout. Use Value: Eliminates boot failures caused by marginal VCC rise times and enforces deterministic recovery after transient power dips on PoE injectors. |
| Embedded Security Gateways | Server BMC Power Monitoring |
|
Use Scenario: Secure boot integrity and tamper-resilient operation in firewall and VPN gateway appliances. IC Role / Device Role / Timing Role: Supervises 3.3V crypto-processor supply and feeds manual reset signal from physical security button to enforce cold restart on intrusion detection. Use Value: Guarantees cryptographic key reinitialization after forced reset and prevents privilege escalation via incomplete boot states. |
Use Scenario: Baseboard Management Controller (BMC) power health monitoring in rack-mounted servers. IC Role / Device Role / Timing Role: Watches 3.3V BMC supply and triggers watchdog reset if host firmware fails to service WDI within 1.6s during firmware updates. Use Value: Avoids BMC lockup during critical field upgrades and maintains out-of-band management availability without main CPU intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX823S-29-TG-7 | 2.93V threshold, open-drain RESET, no WDI, 200ms timeout | Lacks watchdog and manual reset; suited only for basic power-monitoring use cases | Select when watchdog and MR are unnecessary and open-drain interface is required for wired-OR reset buses |
| MAX809SEUR+T | 2.93V threshold, push-pull RESET, no WDI or MR, 240ms timeout | Provides only power-on reset; no runtime fault detection capability | Choose for cost-sensitive designs where only power-up sequencing is needed and no runtime supervision is required |
Compared with APX823S-29-TG-7 and MAX809SEUR+T, PT7M7825TTAEX uniquely combines precision 2.93V monitoring, push-pull RESET, debounced MR, and 1.6s watchdog in a single SOT23-5 package-enabling full-coverage supervision without external components or logic overhead.
Availability
PT7M7825TTAEX is available at Aetrix Electronics and suitable for industrial PLC controllers, network switch power management, embedded security gateways, and server BMC power monitoring requiring stable component supply and long-term production continuity.
Supply support for PT7M7825TTAEX 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 communications markets.
The PT7M78xx family targets μP system reliability enhancement through integrated voltage monitoring, watchdog, and manual reset functions-designed specifically for embedded systems needing compact, low-power, and functionally complete supervision.
FAQ
What is the minimum VCC required for PT7M7825TTAEX to assert a valid RESET signal?
The device guarantees valid RESET/RESET logic states down to VCC = 1.0V. At this voltage, RESET remains low until VCC rises above the 2.93V threshold and sustains the 200ms reset pulse. This enables safe initialization in multi-rail systems where auxiliary supplies stabilize before main rails.
Does PT7M7825TTAEX require an external pull-up resistor on the MR pin?
No. PT7M7825TTAEX integrates a 35–75kΩ internal pull-up resistor on MR, allowing direct connection of a momentary switch to GND without external components. Leaving MR unconnected defaults it to high, disabling manual reset-no floating-input risk exists.
How does the watchdog timer interact with the manual reset function?
A manual reset event (MR low-to-high transition) clears the watchdog timer and initiates a new 200ms reset pulse. The timer only resumes counting after RESET is released. This ensures that intentional resets do not mask subsequent firmware hangs-the watchdog remains fully active post-reset.
Can PT7M7825TTAEX be used in automotive applications?
While PT7M7825TTAEX meets industrial temperature (–40°C to +85°C) and RoHS 3 requirements, it is not AEC-Q100 qualified. For automotive use, Diodes recommends contacting their sales team for PPAP-capable, IATF 16949-manufactured alternatives with formal automotive qualification.
PT7M7825TTAEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- 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-23-5
PT7M7825TTAEX FAQ
1.How can I place an order for PT7M7825TTAEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PT7M7825TTAEX 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 PT7M7825TTAEX reliable?
The price and inventory of PT7M7825TTAEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT7M7825TTAEX is usually 5 days.
3.What payment methods are accepted for PT7M7825TTAEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT7M7825TTAEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PT7M7825TTAEX?
PT7M7825TTAEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PT7M7825TTAEX 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 PT7M7825TTAEX?
For technical support, including PT7M7825TTAEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT7M7825TTAEX requirements.
6.How does Aetrix verify that PT7M7825TTAEX is sourced from the original manufacturer or authorized distributors?
All PT7M7825TTAEX 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 PT7M7825TTAEX meets industry standards.
7.What is the process for return or replacement of PT7M7825TTAEX?
All PT7M7825TTAEX units undergo pre-shipment inspection (PSI). If there is an issue with PT7M7825TTAEX, 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 PT7M7825TTAEX part is unused and in its original packaging.
Return procedure for PT7M7825TTAEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PT7M7825TTAEX 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…
