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Texas Instruments SM72240MFE-3.08/NOPB
- Part No.:
- SM72240MFE-3.08/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
SM72240MFE-3.08/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:200
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Product details
Overview
SM72240MFE-3.08/NOPB from Texas Instruments is a renewable-energy-grade microprocessor supervisory IC that monitors 3.3V supply rails, provides precise 3.08V ±0.05V reset threshold, delivers 190 ms typical active-low open-drain RESET pulse, and operates across −40°C to +125°C for solar inverter control systems.
For engineers reviewing the SM72240MFE-3.08/NOPB datasheet, SM72240MFE-3.08/NOPB pinout, SM72240MFE-3.08/NOPB application, or SM72240MFE-3.08/NOPB equivalent, key selection criteria include guaranteed reset validity down to VCC ≥1V, manual reset debouncing with 22 kΩ internal pull-up, immunity to sub-100 ns MR glitches, and compatibility with MAX811/812-based designs in harsh-temperature embedded environments.
Technical Context
The SM72240MFE-3.08/NOPB integrates three comparators (power-supply, manual-reset, low-line), a precision 1.225V reference, reset logic with one-shot timer, and open-drain output stage-all optimized for renewable energy applications requiring extended temperature operation and high transient immunity.
It uses factory-programmed 3.08V reset threshold calibrated for 3.3V nominal supplies, features 30 ppm/°C tempco for stable trip point over temperature, and maintains RESET assertion for ≥100 ms after VCC rises above threshold-ensuring reliable microprocessor initialization during brown-out recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±0.05V - precisely matches 3.3V rail monitoring with 91.8–95.2% tolerance window |
| Reset Timeout | 190 ms typical - guarantees sufficient hold time for full microprocessor boot sequence |
| Supply Current | 7 µA typical at 3.6V - enables ultra-low-power operation in battery-backed or energy-harvested systems |
| Operating Temp | −40°C to +125°C - qualified for under-hood, outdoor PV inverter, and industrial control environments |
| VCC Range | 1.0V to 5.5V - RESET remains valid even during deep brown-out, supporting fail-safe state retention |
| MR Input | Internal 22 kΩ pull-up - eliminates external components for manual reset interface |
| Reset Output | Active-low open-drain - allows wired-OR of multiple supervisors and level-shifting to any ≤5.5V logic rail |
Pinout & Package
SM72240MFE-3.08/NOPB is housed in a 5-pin SOT-23 (DBV) package with 1.45 mm max height, 2.9 mm × 1.6 mm footprint, and lead-free Sn finish compliant with RoHS and Level-1 MSL rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference and device substrate connection - must be tied directly to system ground plane |
| 2 | GND | Second ground terminal - improves thermal dissipation and reduces ground bounce in noisy environments |
| 3 | RESET | Active-low open-drain reset output - requires external pull-up; sinks up to 3.2 mA at VTH min |
| 4 | MR | Manual reset input - internally pulled up to VCC; asserts reset when pulled below 0.25×VCC for >100 ns |
| 5 | VCC | Positive supply input - accepts 1.0V–5.5V; powers all internal circuitry including reset comparator and timer |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.08V reset threshold | Factory-trimmed for 3.3V rail monitoring with ±0.05V accuracy and 30 ppm/°C stability |
| Low 7 µA supply current | Enables multi-year operation in solar-powered remote sensors without compromising reset reliability |
| 190 ms reset timeout | Exceeds industry-standard 100 ms minimum, ensuring robust initialization of complex MCUs and FPGAs |
| MR input with 22 kΩ pull-up | Reduces BOM count by eliminating external resistor; supports direct pushbutton or logic-level reset initiation |
| VCC ≥1V RESET validity | Guarantees controlled shutdown sequencing even during catastrophic power collapse |
Applications
| Solar Inverter Control | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitoring DC-link voltage supervisor in string inverters operating at −40°C to +125°C ambient. IC Role / Device Role / Timing Role: Microprocessor reset circuit asserting active-low signal during PV array shading-induced brown-out. Use Value: Prevents firmware corruption by holding MCU in reset until 3.3V rail stabilizes above 3.08V for ≥190 ms post-recovery. |
Use Scenario: Power-on supervision for ARM Cortex-M7-based I/O controller in factory automation cabinets. IC Role / Device Role / Timing Role: Voltage monitor generating clean reset pulse synchronized to 3.3V LDO startup. Use Value: Eliminates need for RC-based reset circuits; ensures deterministic boot timing across temperature and voltage tolerances. |
| Battery-Backed Data Logger | Smart Grid Communication Node |
Use Scenario: Supervising backup power path in lithium-thionyl chloride powered environmental sensor nodes. IC Role / Device Role / Timing Role: Low-current reset supervisor enabling <10 µA sleep mode while maintaining reset integrity. Use Value: Extends 10-year field life by minimizing quiescent draw and guaranteeing safe restart after battery voltage sag. |
Use Scenario: Reset coordination between RF SoC and metrology ASIC in ANSI C12.22-compliant AMI endpoints. IC Role / Device Role / Timing Role: Dual-rail supervisor synchronizing reset assertion across 3.3V digital and 1.8V analog domains. Use Value: Enables glitch-free handoff between communication stack and metering firmware during grid voltage transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811TEUS+T | 3.08V threshold, but only rated −40°C to +85°C; 14 µA ICC vs 7 µA; no internal MR pull-up | Limited to commercial-temperature industrial gateways, not solar outdoor deployment | Select when cost sensitivity outweighs extended temperature and ultra-low current requirements |
| TPS3808G30DBVR | 3.0V threshold (±1.5%), 1.5 µA ICC, −40°C to +125°C, but lacks MR input and open-drain flexibility | Suitable for space-constrained IoT edge nodes where manual reset is unnecessary | Choose when minimal quiescent current is critical and MR functionality is omitted from system architecture |
Compared with MAX811TEUS+T, SM72240MFE-3.08/NOPB delivers 50% lower supply current and full automotive-grade temperature range; versus TPS3808G30DBVR, it adds manual reset capability and open-drain output for multi-supervisor coordination-making it optimal for renewable energy control units requiring field-serviceable reset and thermal resilience.
Availability
SM72240MFE-3.08/NOPB is available at Aetrix Electronics and suitable for solar inverter control, industrial PLC I/O modules, and battery-backed data loggers requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SM72240MFE-3.08/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 focus on industrial, automotive, and renewable energy markets.
The SM72240 product line was designed specifically for high-reliability microprocessor supervision in photovoltaic systems, featuring renewable-energy-grade qualification, precision voltage thresholds, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of the SM72240MFE-3.08/NOPB?
The SM72240MFE-3.08/NOPB has a factory-programmed reset threshold of 3.08V with a tolerance of ±0.05V (3.03V to 3.14V) over the full −40°C to +125°C temperature range. This value is explicitly specified in the Electrical Characteristics table of the SNIS154C datasheet and calibrated for monitoring 3.3V nominal supply rails.
Does the SM72240MFE-3.08/NOPB support manual reset functionality?
Yes, the SM72240MFE-3.08/NOPB includes a dedicated MR (Manual Reset) input on Pin 4. It features an internal 22 kΩ pull-up resistor, requires only a momentary low pulse >100 ns to assert reset, and holds reset active for 190 ms after MR returns high-enabling pushbutton or logic-controlled system restart without external components.
Can the SM72240MFE-3.08/NOPB operate reliably below 1.0V VCC?
No-the SM72240MFE-3.08/NOPB specifies VCC operating range as 1.0V to 5.5V. While the RESET output remains functional down to VCC = 1V, operation below 1.0V is outside absolute maximum ratings and not characterized. The device will not assert valid reset behavior if VCC drops below 1.0V.
What package type and dimensions does the SM72240MFE-3.08/NOPB use?
The SM72240MFE-3.08/NOPB uses the 5-pin SOT-23 (DBV) package per JEDEC MO-178, measuring 2.9 mm × 1.6 mm with 1.45 mm max height. Pin 1 orientation follows quadrant Q3 tape configuration, and the package carries RoHS-compliant Sn lead finish with Level-1 MSL rating.
Is the SM72240MFE-3.08/NOPB pin-compatible with MAX811/812 series devices?
The SM72240MFE-3.08/NOPB shares functional equivalence and application compatibility with MAX811/812 devices, as confirmed in the datasheet's "Compatible with MAX811/812 applications" feature list-but it is not pin-to-pin compatible due to dual-GND pins (Pins 1 and 2) and different pin assignments. Board redesign is required for drop-in replacement.
SM72240MFE-3.08/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:
- 3.08V
- 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
SM72240MFE-3.08/NOPB FAQ
1.How can I place an order for SM72240MFE-3.08/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for SM72240MFE-3.08/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 SM72240MFE-3.08/NOPB reliable?
The price and inventory of SM72240MFE-3.08/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM72240MFE-3.08/NOPB is usually 5 days.
3.What payment methods are accepted for SM72240MFE-3.08/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM72240MFE-3.08/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM72240MFE-3.08/NOPB?
SM72240MFE-3.08/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM72240MFE-3.08/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 SM72240MFE-3.08/NOPB?
For technical support, including SM72240MFE-3.08/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM72240MFE-3.08/NOPB requirements.
6.How does Aetrix verify that SM72240MFE-3.08/NOPB is sourced from the original manufacturer or authorized distributors?
All SM72240MFE-3.08/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 SM72240MFE-3.08/NOPB meets industry standards.
7.What is the process for return or replacement of SM72240MFE-3.08/NOPB?
All SM72240MFE-3.08/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with SM72240MFE-3.08/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 SM72240MFE-3.08/NOPB part is unused and in its original packaging.
Return procedure for SM72240MFE-3.08/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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