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Diodes Incorporated PT7M7823KTAEX
- Part No.:
- PT7M7823KTAEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
PT7M7823KTAEX.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,417
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Product details
Overview
PT7M7823KTAEX from Diodes Incorporated is a precision microprocessor supervisory IC with 2.25V reset threshold, 200ms reset pulse width, push-pull active-low RESET output, manual-reset (MR) and watchdog input (WDI) functions, designed for reliable power-up/power-down sequencing in embedded microprocessor systems.
For engineers reviewing the PT7M7823KTAEX datasheet, PT7M7823KTAEX pinout, PT7M7823KTAEX application, or PT7M7823KTAEX equivalent, key selection criteria include guaranteed RESET validity down to VCC = 1.0V, ±2.5% threshold accuracy over –40°C to +85°C, internal MR pull-up resistor (52 kΩ typ), and 1.6s watchdog timeout period.
Technical Context
The PT7M7823KTAEX integrates a precision voltage monitor, debounced CMOS-compatible manual-reset input, and a self-clearing watchdog timer with 150ns minimum WDI pulse detection. Its reset generator asserts RESET low during power-up until VCC exceeds 2.25V and remains asserted for 200ms after threshold crossing.
Watchdog functionality triggers reset if WDI remains static beyond 1.6s (typ); the timer clears on any WDI edge or RESET assertion. The device operates from 1.0V to 5.5V supply and guarantees valid RESET/RESET outputs across this full range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.25V ±2.5% over –40°C to +85°C - ensures accurate brownout detection for 2.5V/3.3V systems |
| Reset Pulse Width | 200ms typ - provides sufficient time for µP initialization and peripheral stabilization |
| Supply Voltage Range | 1.0V to 5.5V - supports operation during deep brownout and enables use with Li-ion, coin-cell, or multi-rail systems |
| Watchdog Timeout | 1.6s typ - balances fault detection responsiveness with software execution margin |
| MR Pull-up Resistor | 52 kΩ typ - eliminates need for external pull-up in push-button reset circuits |
| RESET Output Type | Push-pull active-low - drives logic directly without external pull-up; sinks up to 3.2mA at VCC ≥ 4.5V |
| Quiescent Current | 13 µA typ at 5V - enables long battery life in always-on monitoring applications |
Pinout & Package
SOT23-5 package (5-pin, 1.6mm × 2.9mm, 0.95mm height) with standard lead finish and RoHS-compliant Pb-free plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Power supply input | Primary supply rail; RESET assertion guaranteed down to 1.0V |
| 2 - GND | Ground reference | Common return path for all analog and digital circuitry |
| 3 - RESET | Active-low reset output | Push-pull driver; asserts low during power-up, brownout, watchdog timeout, or MR activation |
| 4 - MR | Manual-reset input | CMOS-compatible active-low input; internally pulled up (52 kΩ); debounced |
| 5 - WDI | Watchdog input | Edge-sensitive input; toggling required every ≤1.6s to prevent reset assertion |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.25V threshold | ±2.5% tolerance over full temperature range ensures consistent brownout response in industrial environments |
| Guaranteed RESET at VCC = 1.0V | Enables fail-safe reset assertion even during severe undervoltage conditions before µP loses state |
| Integrated MR pull-up (52 kΩ) | Reduces BOM count and PCB area by eliminating external resistor in button-reset designs |
| 150ns minimum WDI pulse width | Supports fast µP GPIO toggling without requiring dedicated timing peripherals |
| 200ms reset timeout with hysteresis | Prevents oscillatory reset during slow-rising VCC transitions near threshold |
Applications
| Industrial PLC Controller | Network Router Power Management |
|---|---|
Use Scenario: Power sequencing and fault recovery in DIN-rail mounted programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Supervisory IC providing power-on reset, brownout protection, and watchdog-triggered recovery for ARM Cortex-M7 host MCU. Use Value: Ensures deterministic boot state after voltage sags caused by motor switching transients; 2.25V threshold aligns with 2.5V I/O rail monitoring. | Use Scenario: Reliable restart of dual-core MIPS-based routing engines following AC power interruption or PoE voltage drop. IC Role / Device Role / Timing Role: System-level supervisor asserting RESET to both CPU and switch fabric ASIC during VCC instability. Use Value: 200ms reset pulse prevents premature firmware execution before DDR memory stabilizes; WDI tied to CPU GPIO enables software-controlled health checks. |
| Embedded Security Gateway | Enterprise SSD Controller Board |
Use Scenario: Tamper-resilient boot sequence in FIPS-compliant network security appliances with secure boot ROM and encrypted flash. IC Role / Device Role / Timing Role: Primary reset source coordinating power-good signaling between PMIC, crypto accelerator, and main application processor. Use Value: Guaranteed RESET validity at VCC = 1.0V prevents glitch-induced bypass of secure boot verification during rapid power collapse. | Use Scenario: Power integrity monitoring for NVMe SSD controller SoCs handling high-speed NAND flash access under variable load conditions. IC Role / Device Role / Timing Role: Voltage supervisor detecting 3.3V rail droop during burst write operations and triggering controlled shutdown via WDI timeout. Use Value: 1.6s watchdog timeout allows full NAND page programming cycles while preventing hang-induced data corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT23+T | 2.32V threshold, 200ms reset, open-drain RESET, no WDI | Lacks watchdog functionality; requires external pull-up for RESET | Choose when only voltage monitoring and manual reset are needed, and system lacks WDI-capable GPIO |
| TPS3808G125DBVR | 1.25V threshold, 200ms reset, push-pull RESET, no MR input | Lower threshold targets 1.8V/1.2V core rails; no manual reset capability | Choose for ultra-low-voltage SoC supervision where board space precludes push-button reset |
Compared with MAX6326UT23+T and TPS3808G125DBVR, PT7M7823KTAEX uniquely combines 2.25V threshold, integrated WDI, debounced MR, and guaranteed 1.0V operation-making it optimal for 2.5V/3.3V embedded systems requiring full-feature supervision in SOT23-5 footprint.
Availability
PT7M7823KTAEX is available at Aetrix Electronics and suitable for industrial PLC controllers, network router power management, embedded security gateways, and enterprise SSD controller boards requiring stable component supply and long-term manufacturability.
Supply support for PT7M7823KTAEX 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, serving industrial, computing, communications, and consumer markets with high-reliability components.
The PT7M78xx family is engineered specifically for µP system reliability-integrating precision voltage monitoring, watchdog timing, and manual reset in minimal footprint to replace discrete supervision solutions.
FAQ
What is the guaranteed minimum VCC level at which RESET remains valid?
PT7M7823KTAEX guarantees valid RESET and RESET outputs down to VCC = 1.0V, ensuring deterministic reset assertion even during severe brownout events before the microprocessor loses functional state. This is confirmed in the datasheet's "Guaranteed RESET/RESET valid at VCC=1.0V" section and verified across –40°C to +85°C.
Does PT7M7823KTAEX require an external pull-up resistor on the MR pin?
No. PT7M7823KTAEX includes an internal MR pull-up resistor with typical value 52 kΩ (min 35 kΩ, max 75 kΩ), allowing direct connection of a momentary switch between MR and GND without external components. This is specified in the DC Electrical Characteristics table under "r MR pull-up resistor".
How does the watchdog timer respond to WDI signal edges?
The watchdog timer clears on every rising or falling edge of WDI and begins counting anew. If WDI remains static (high or low) for ≥1.6s (typ), the timer expires and asserts RESET. Floating WDI or connecting it to a high-impedance buffer disables the watchdog, as stated in the Functional Description section.
Can PT7M7823KTAEX be used with a 1.8V supply rail?
Yes. While its 2.25V reset threshold is optimized for 2.5V/3.3V systems, PT7M7823KTAEX operates from VCC = 1.0V to 5.5V and maintains full functionality-including RESET assertion, MR response, and WDI monitoring-at 1.8V. However, the 2.25V threshold will not trigger reset on 1.8V rails unless undershoot occurs below that level.
PT7M7823KTAEX 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:
- 2.25V
- Output:
- Push-Pull, Totem Pole
- Reset:
- 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
PT7M7823KTAEX FAQ
1.How can I place an order for PT7M7823KTAEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PT7M7823KTAEX 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 PT7M7823KTAEX reliable?
The price and inventory of PT7M7823KTAEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT7M7823KTAEX is usually 5 days.
3.What payment methods are accepted for PT7M7823KTAEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT7M7823KTAEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PT7M7823KTAEX?
PT7M7823KTAEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PT7M7823KTAEX 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 PT7M7823KTAEX?
For technical support, including PT7M7823KTAEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT7M7823KTAEX requirements.
6.How does Aetrix verify that PT7M7823KTAEX is sourced from the original manufacturer or authorized distributors?
All PT7M7823KTAEX 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 PT7M7823KTAEX meets industry standards.
7.What is the process for return or replacement of PT7M7823KTAEX?
All PT7M7823KTAEX units undergo pre-shipment inspection (PSI). If there is an issue with PT7M7823KTAEX, 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 PT7M7823KTAEX part is unused and in its original packaging.
Return procedure for PT7M7823KTAEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PT7M7823KTAEX Tags
-
MIC826SYMT-TR
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