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Texas Instruments SM72240MFX-4.63/NOPB
- Part No.:
- SM72240MFX-4.63/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
SM72240MFX-4.63/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,999
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Product details
Overview
SM72240MFX-4.63/NOPB from Texas Instruments is a precision 5-pin microprocessor supervisory circuit designed for renewable energy systems, monitoring +5V supply rails with a factory-programmed 4.63V reset threshold, 190 ms typical reset timeout, active-low open-drain RESET output valid down to VCC ≥1V, and operating across −40°C to +125°C.
For engineers reviewing the SM72240MFX-4.63/NOPB datasheet, SM72240MFX-4.63/NOPB pinout, SM72240MFX-4.63/NOPB application, or SM72240MFX-4.63/NOPB equivalent, key selection criteria include reset threshold accuracy (±0.09V), low 6 µA typical supply current, manual reset input debouncing, power supply transient immunity, and SOT-23 (DBV) package compatibility with space-constrained solar inverter control boards.
Technical Context
The SM72240MFX-4.63/NOPB integrates a precision bandgap reference (1.225V), dual comparators (reset and manual reset), and a one-shot timer to generate a minimum 100 ms, 190 ms typical active-low reset pulse after VCC rises above 4.63V or MR deasserts.
Its internal 22 kΩ MR pull-up, glitch immunity (≤100 ns), and open-drain RESET output support daisy-chaining and level-shifting without external logic; it asserts reset during brown-out, power-up, and power-down while maintaining validity down to VCC = 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±0.09V - precisely monitors nominal 5V supplies within 91–94% range to prevent premature or delayed MCU initialization. |
| Reset Timeout | 100–560 ms - ensures sufficient hold time for full microprocessor reset sequencing, with 190 ms typical guaranteeing reliable boot. |
| Supply Current | 6 µA typical at VCC = 5.5V - enables ultra-low-power operation in battery-backed or energy-harvesting solar controller applications. |
| Operating Temp | −40°C to +125°C - supports deployment in outdoor photovoltaic inverters and industrial embedded controllers exposed to wide ambient swings. |
| VCC Range | 1.0V to 5.5V - allows RESET output to remain functional and valid even during deep brown-out conditions down to 1V supply. |
| MR Input Logic | VIL = 0.8V, VIH = 2.3V - compatible with standard CMOS/TTL logic levels and provides robust noise margin against switching transients. |
| RESET Output | Open-drain, VOL = 0.4V @ 3.2 mA - permits flexible pull-up to any voltage ≤5.5V and safe parallel connection of multiple supervisors. |
Pinout & Package
SOT-23 (DBV) 5-pin plastic package, 1.45 mm max height, JEDEC MO-178 compliant, with pin 1 index area and Q3 quadrant orientation on tape.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference and device substrate connection - must be tied directly to system ground plane for stable comparator reference and thermal dissipation. |
| 2 | GND | Second ground terminal - improves noise immunity and reduces ground bounce in high-noise solar power environments. |
| 3 | RESET | Active-low open-drain reset output - requires external pull-up; sinks current to force microprocessor reset until timeout expires. |
| 4 | MR | Manual reset input - internally pulled up to VCC via 22 kΩ; pulling below 0.8V initiates 2 µs propagation delay reset pulse. |
| 5 | VCC | Positive supply input - powers internal circuitry and references all comparators; valid operation starts at 1.0V. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63V threshold | Ensures reset assertion occurs only when 5V rail drops below 92.6% nominal, preventing spurious resets during minor line sags. |
| 190 ms typical reset timeout | Guarantees sufficient duration for full microcontroller core and peripheral initialization before release, eliminating boot failures. |
| 6 µA typical ICC | Minimizes standby power draw in always-on solar monitoring nodes, extending battery life or reducing auxiliary supply burden. |
| MR input with 22 kΩ pull-up | Eliminates need for external pull-up resistor and simplifies PCB layout for pushbutton or FPGA-driven manual reset interfaces. |
| VCC ≥1V RESET validity | Enables deterministic reset behavior during deep brown-out events where supply collapses below 2V, critical for fault-safe shutdown. |
Applications
| Solar Inverter Control | Industrial Microcontroller Supervision |
|---|---|
|
Use Scenario: Monitoring DC-link voltage supervisor in string-level photovoltaic inverters subject to rapid irradiance changes and grid transients. IC Role / Device Role / Timing Role: Resets main MCU and gate driver logic upon 5V auxiliary supply brown-out, ensuring safe IGBT turn-off and anti-islanding compliance. Use Value: Prevents firmware lockup during partial shading events by asserting reset within 20 µs of VCC dropping below 4.54V, per electrical characteristics. |
Use Scenario: Power-on and brown-out supervision in programmable logic controllers deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Generates clean, glitch-immune reset signal synchronized to 5V backplane supply, with manual reset capability for field service. Use Value: Eliminates need for RC-based reset circuits by providing factory-trimmed 4.63V threshold and 190 ms timeout, reducing BOM count and calibration labor. |
| Renewable Energy Data Logger | Smart Grid Edge Sensor Node |
|
Use Scenario: Battery-powered environmental sensor hub collecting irradiance, temperature, and panel voltage data in remote solar farms. IC Role / Device Role / Timing Role: Supervises 5V LDO output powering MCU and RF transceiver; triggers controlled shutdown and wake-up reset on low-battery brown-out. Use Value: Enables reliable operation down to 1.0V VCC, allowing graceful data save and sleep entry before complete power loss - verified per absolute ratings. |
Use Scenario: Distributed phasor measurement unit (PMU) installed on utility distribution transformers with intermittent AC-derived 5V supply. IC Role / Device Role / Timing Role: Provides precise reset timing and MR-triggered re-synchronization for IEEE C37.118-compliant time-aligned sampling. Use Value: Delivers <30 ppm/°C reset threshold tempco, ensuring consistent trip point across −40°C to +125°C ambient - critical for sub-cycle timing accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811TEUS+T | 4.63V threshold, but only specified over −40°C to +85°C; 14 µA typical ICC; no MR input. | Lacks manual reset and extended temperature rating - unsuitable for outdoor solar deployments requiring >85°C operation. | Choose only for cost-sensitive commercial-grade 5V systems with limited thermal range and no MR requirement. |
| TPS3808G33DBVR | 3.3V threshold variant; 1.5 µA ICC; supports adjustable delay via capacitor; operates −40°C to +125°C. | Designed for 3.3V domains; requires external capacitor for timing; not pin-compatible with SM72240MFX-4.63/NOPB. | Select when supervising 3.3V MCUs and adjustable timeout is needed - not a direct replacement for 5V/4.63V monitoring. |
Compared with MAX811TEUS+T and TPS3808G33DBVR, the SM72240MFX-4.63/NOPB uniquely combines renewable-energy-grade temperature range, integrated MR input, and ultra-low 6 µA supply current in a fixed 4.63V 5-pin SOT-23 package - making it optimal for ruggedized 5V solar control applications where reliability and power efficiency are co-prioritized.
Availability
SM72240MFX-4.63/NOPB is available at Aetrix Electronics and suitable for solar inverter control, industrial PLC supervision, and battery-powered renewable energy data loggers requiring stable component supply, long-term lifecycle continuity, and traceable sourcing.
Supply support for SM72240MFX-4.63/NOPB 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
Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions with emphasis on industrial, automotive, and power management applications.
The SM72240 product line was developed specifically for renewable energy systems, offering precision voltage supervision with extended temperature operation and low quiescent current tailored to solar inverter and smart-grid edge node requirements.
FAQ
What is the exact reset threshold voltage of the SM72240MFX-4.63/NOPB?
The SM72240MFX-4.63/NOPB has a factory-programmed reset threshold of 4.63V, with a guaranteed range of 4.50V to 4.75V across −40°C to +125°C. This value is laser-trimmed during production and documented in the Electrical Characteristics table of the SNIS154C datasheet.
Does the SM72240MFX-4.63/NOPB support manual reset functionality?
Yes, the SM72240MFX-4.63/NOPB includes a dedicated MR (Manual Reset) input on pin 4. It features an internal 22 kΩ pull-up resistor and asserts reset when pulled below 0.8V for more than 100 ns, with a 2 µs propagation delay - fully detailed in the PIN DESCRIPTIONS section.
What package type and dimensions does the SM72240MFX-4.63/NOPB use?
The SM72240MFX-4.63/NOPB uses the SOT-23 (DBV) 5-pin package, measuring 2.9 mm × 1.6 mm × 1.45 mm max height, with JEDEC MO-178 compliance and Q3 pin-1 quadrant orientation on tape - confirmed in the PACKAGE OUTLINE and TAPE AND REEL INFORMATION sections.
Can the SM72240MFX-4.63/NOPB operate reliably below 2V supply voltage?
Yes, the SM72240MFX-4.63/NOPB guarantees RESET output validity down to VCC ≥1.0V, and its internal circuitry remains functional across the full 1.0V to 5.5V supply range - enabling controlled reset assertion during deep brown-out events before total power loss.
Is the SM72240MFX-4.63/NOPB RoHS compliant and lead-free?
Yes, the SM72240MFX-4.63/NOPB is RoHS compliant with lead finish SN (matte tin), MSL Level-1 rating, and peak reflow tolerance up to 260°C - verified in the PACKAGE OPTION ADDENDUM under "RoHS" and "Lead finish/Ball material" columns.
SM72240MFX-4.63/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SolarMagic™
- 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:
- 4.63V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
SM72240MFX-4.63/NOPB FAQ
1.How can I place an order for SM72240MFX-4.63/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for SM72240MFX-4.63/NOPB 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 SM72240MFX-4.63/NOPB reliable?
The price and inventory of SM72240MFX-4.63/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM72240MFX-4.63/NOPB is usually 5 days.
3.What payment methods are accepted for SM72240MFX-4.63/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM72240MFX-4.63/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM72240MFX-4.63/NOPB?
SM72240MFX-4.63/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM72240MFX-4.63/NOPB 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 SM72240MFX-4.63/NOPB?
For technical support, including SM72240MFX-4.63/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM72240MFX-4.63/NOPB requirements.
6.How does Aetrix verify that SM72240MFX-4.63/NOPB is sourced from the original manufacturer or authorized distributors?
All SM72240MFX-4.63/NOPB 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 SM72240MFX-4.63/NOPB meets industry standards.
7.What is the process for return or replacement of SM72240MFX-4.63/NOPB?
All SM72240MFX-4.63/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with SM72240MFX-4.63/NOPB, 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 SM72240MFX-4.63/NOPB part is unused and in its original packaging.
Return procedure for SM72240MFX-4.63/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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