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Diodes Incorporated PT7M825SSE-7
- Part No.:
- PT7M825SSE-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
PT7M825SSE-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT353
- Quantity:
- Payment:
- Shipping:
Inventory:2,033
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Product details
Overview
PT7M825SSE-7 from Diodes Incorporated is a precision microprocessor (µP) supervisory circuit with active-high and active-low reset outputs, manual reset input, and no watchdog function-specifically configured for 2.93V threshold monitoring in SOT353 packaging. It asserts reset during power-up, brownout, and manual trigger events with 200ms pulse width, and guarantees RESET/RESET validity down to VCC = 1.0V. Used in embedded systems requiring reliable power sequencing and fault recovery.
For engineers reviewing the PT7M825SSE-7 datasheet, PT7M825SSE-7 pinout, PT7M825SSE-7 application, or PT7M825SSE-7 equivalent, this page delivers verified functional distinctions among PT7M823/824/825 variants, confirmed reset timing behavior, voltage threshold tolerance (±2.0% over -40°C to +85°C), and SOT353 package-level design constraints for PCB layout and thermal management.
Technical Context
The PT7M825 implements dual-reset supervision with independent push-pull outputs: RESET (active-low) and RESET (active-high, inverse logic), both guaranteed functional at VCC ≥ 1.0V. Its internal reset generator uses a precision bandgap reference and hysteresis (0.80% VRN) to reject supply noise during brownout detection.
Unlike PT7M823 (WDI + MR) and PT7M824 (dual RESET + WDI), PT7M825 integrates MR and dual RESET outputs while omitting watchdog functionality-making it suitable for µP systems where manual reset control and redundant reset signaling are prioritized over autonomous watchdog timeout supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 2.93V nominal (VRN), ±2.0% tolerance over -40°C to +85°C - ensures accurate brownout detection for 3.3V systems with margin. |
| Reset Pulse Width | 200ms typical (140–280ms range) - provides sufficient hold time for µP initialization and peripheral stabilization. |
| Supply Voltage Range | 1.0V to 5.5V - enables operation across battery-backed and multi-rail embedded platforms, including low-VCC wake-up scenarios. |
| Reset Output Drive | Push-pull, 1.2mA sink capability at VCC = VRST(MIN) - eliminates need for external pull-up resistors on RESET/RESET lines. |
| Manual Reset Input | Debounced CMOS-compatible, internal 35–75kΩ pull-up - supports direct connection to momentary switch without external components. |
| Quiescent Current | 10µA typical at 5V, ≤36µA max - minimizes standby power impact in always-on monitoring applications. |
| ESD Protection | HBM: 5kV, CDM: 1kV - meets industrial-grade robustness requirements for board-level handling and system integration. |
Pinout & Package
SOT353 (5-pin, 1.25mm × 2.1mm footprint) - ultra-compact surface-mount package with exposed pad not present; compatible with standard reflow profiles per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull reset output; asserted high when VCC < 2.93V or MR pulled low; valid down to VCC = 1.0V. |
| 2 | GND | Ground reference for all analog and digital functions; must be connected to system ground plane with low-impedance path. |
| 3 | MR | Active-low manual reset input; internally pulled up; falling edge triggers 200ms reset pulse; noise-immune to <100ns glitches. |
| 4 | RESET | Active-low push-pull reset output; inverse of Pin 1; same timing and voltage specifications as RESET. |
| 5 | VCC | Positive supply input; powers internal reference, timer, and output drivers; decoupling capacitor (0.1µF) required within 2mm. |
Key Features
| Feature | Design Value |
|---|---|
| Dual complementary reset outputs | Simultaneous active-high (RESET) and active-low (RESET) signals eliminate level-shifting needs in mixed-logic µP interfaces. |
| Guaranteed operation at 1.0V VCC | Enables reliable reset assertion during deep brownout or battery sag conditions before µP core loses state retention. |
| 2.93V precision threshold | Optimized for 3.3V nominal rails with 5% margin; matches common LDO dropout and battery end-of-life thresholds. |
| Internal MR pull-up resistor | 35–75kΩ range eliminates external biasing components and reduces BOM count in space-constrained designs. |
| Reset hysteresis | 0.80% VRN prevents chatter during slow VCC ramp-up/down transitions near threshold voltage. |
Applications
| Industrial PLC Controller | Network Router Power Management |
|---|---|
Use Scenario: Power sequencing and fault recovery in DIN-rail mounted programmable logic controllers operating across wide ambient temperatures. IC Role / Device Role / Timing Role: Supervises 3.3V I/O rail and triggers hard reset on brownout or operator-initiated maintenance reset. Use Value: Dual RESET/RESET outputs interface directly with both ARM Cortex-M7 reset pin and FPGA configuration controller without logic inversion. |
Use Scenario: Ensuring clean boot and recovery after PoE power interruption or AC adapter disconnect in enterprise-grade routers. IC Role / Device Role / Timing Role: Monitors primary 3.3V switching regulator output and asserts synchronized reset to CPU, PHY, and memory subsystems. Use Value: 200ms pulse width exceeds minimum reset hold time for Broadcom BCM58xx SoCs and Micrel KSZ9031RNX PHYs. |
| Server Baseboard Management | Medical Diagnostic Edge Device |
Use Scenario: BMC (Baseboard Management Controller) power integrity monitoring in 1U rack servers with redundant 12V/5V/3.3V supplies. IC Role / Device Role / Timing Role: Provides independent reset signaling to BMC and host CPU upon 3.3V rail collapse, supporting IPMI watchdog independence. Use Value: MR input allows service technician to force BMC reset via front-panel button without cycling main power. |
Use Scenario: Battery-backed data acquisition module in portable ultrasound equipment requiring fail-safe restart after Li-ion voltage sag. IC Role / Device Role / Timing Role: Supervises backup 3.3V LDO output and initiates controlled shutdown/reset when cell voltage drops below 3.0V. Use Value: Validity down to VCC = 1.0V ensures reset remains asserted even during final battery discharge phase (<2.5V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SSTR | Single active-low reset output only; 2.93V threshold; no RESET complement or MR input. | Lacks manual reset and dual-output capability; requires external inverter for active-high signaling. | Select when board space is constrained and only one reset polarity is needed with minimal feature set. |
| TPS3808G33DBVR | Adjustable threshold via external resistor divider; 200ms fixed delay; includes watchdog timer. | Watchdog function adds complexity but enables autonomous µP recovery; no native MR input. | Choose when system requires programmable voltage monitoring and periodic watchdog supervision, accepting added design overhead. |
Compared with MAX809SSTR and TPS3808G33DBVR, PT7M825SSE-7 uniquely delivers dual-polarity reset outputs plus debounced manual reset in a fixed-threshold, watchdog-free configuration-ideal for deterministic, low-complexity supervision where redundancy and operator control outweigh programmability.
Availability
PT7M825SSE-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, network router power management, and server baseboard management requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for PT7M825SSE-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 ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and communications markets.
PT7M825 belongs to Diodes' µP supervisor product line, engineered for deterministic power-on reset, brownout immunity, and manual intervention in resource-constrained embedded systems-prioritizing simplicity, low quiescent current, and guaranteed sub-1V operation.
FAQ
What is the function of Pin 3 (MR) on PT7M825SSE-7?
Pin 3 is the active-low Manual Reset input. Pulling MR low forces a full 200ms reset pulse on both RESET and RESET outputs. It features internal debouncing and a 35–75kΩ pull-up resistor, allowing direct connection to a momentary switch without external components. Leaving MR unconnected or tying it to VCC disables manual reset functionality.
Does PT7M825SSE-7 include a watchdog timer?
No. PT7M825SSE-7 omits the watchdog input (WDI) found on PT7M823 and PT7M824. Its functional scope is limited to power-supply monitoring, manual reset triggering, and dual-output reset generation. This makes it suitable for systems where watchdog supervision is handled externally or not required.
Can PT7M825SSE-7 operate reliably below 2.93V?
Yes. While its reset threshold is 2.93V, PT7M825SSE-7 guarantees valid RESET/RESET output states down to VCC = 1.0V. Below 2.93V, RESET remains high and RESET remains low until VCC rises above threshold. This ensures deterministic behavior during deep brownout or battery depletion scenarios.
How does the reset hysteresis affect system stability?
The 0.80% VRN hysteresis (≈23mV at 2.93V) prevents oscillatory reset assertion during slow VCC ramp-up or noisy supply conditions near the threshold. It ensures RESET deasserts only after VCC rises ~23mV above 2.93V and reasserts only after falling ~23mV below-eliminating false resets caused by supply ripple or transient droop.
PT7M825SSE-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Push-Pull, Push-Pull
- 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-353
PT7M825SSE-7 FAQ
1.How can I place an order for PT7M825SSE-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for PT7M825SSE-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 PT7M825SSE-7 reliable?
The price and inventory of PT7M825SSE-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT7M825SSE-7 is usually 5 days.
3.What payment methods are accepted for PT7M825SSE-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT7M825SSE-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PT7M825SSE-7?
PT7M825SSE-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PT7M825SSE-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 PT7M825SSE-7?
For technical support, including PT7M825SSE-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT7M825SSE-7 requirements.
6.How does Aetrix verify that PT7M825SSE-7 is sourced from the original manufacturer or authorized distributors?
All PT7M825SSE-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 PT7M825SSE-7 meets industry standards.
7.What is the process for return or replacement of PT7M825SSE-7?
All PT7M825SSE-7 units undergo pre-shipment inspection (PSI). If there is an issue with PT7M825SSE-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 PT7M825SSE-7 part is unused and in its original packaging.
Return procedure for PT7M825SSE-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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