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Texas Instruments SM72240MF-4.63/NOPB
- Part No.:
- SM72240MF-4.63/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
SM72240MF-4.63/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
SM72240MF-4.63/NOPB from Texas Instruments is a precision 5-pin microprocessor supervisory IC designed for renewable energy systems. It monitors +5V supply rails with a factory-programmed 4.63V reset threshold, delivers a minimum 100 ms active-low open-drain RESET pulse (190 ms typical), and operates across −40°C to +125°C. It supports manual reset via MR pin and maintains RESET validity down to VCC ≥1V - critical for solar inverter control and battery-backed monitoring circuits.
For engineers reviewing the SM72240MF-4.63/NOPB datasheet, SM72240MF-4.63/NOPB pinout, SM72240MF-4.63/NOPB application, or SM72240MF-4.63/NOPB equivalent, key selection criteria include its 4.63V threshold tolerance (±0.09V), 6 µA typical supply current, −40°C to +125°C operation, SOT-23 (DBV) package compatibility, and immunity to sub-100 ns MR glitches and 40 µs VCC transients.
Technical Context
The SM72240MF-4.63/NOPB integrates three comparators (VCC monitor, MR input, low-line detection), a 1.225V reference, and a one-shot timer to generate a precisely timed reset pulse. Its reset assertion logic ensures hold time after VCC recovery and guarantees minimum 100 ms duration even during rapid supply fluctuations.
It features internal 22 kΩ MR pull-up, open-drain RESET output rated for 3.2 mA sink at VTH min, and power supply transient immunity validated up to 125 mV overdrive with ≤40 µs duration - enabling robust operation in noisy photovoltaic generator environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±0.09V - precisely targets 5V nominal rail with 90.8–94.4% monitoring window. |
| Reset Timeout | 190 ms typical - ensures sufficient processor initialization time after brownout recovery. |
| Supply Current | 6 µA typical at VCC = 5.5V - enables ultra-low-power operation in always-on solar monitoring nodes. |
| Operating Temp | −40°C to +125°C - qualified for under-hood, outdoor PV inverter, and industrial controller use. |
| RESET Output | Active-low open-drain - allows wired-OR configuration and level-shifting with external pull-up to 5.5V. |
| MR Input Logic | VIL = 0.8V, VIH = 2.3V - compatible with 3.3V/5V logic families and debounced against 100 ns glitches. |
| VCC Range | 1.0V to 5.5V - RESET remains valid down to 1V, supporting brownout detection before full rail collapse. |
Pinout & Package
SM72240MF-4.63/NOPB is housed in a 5-pin SOT-23 (DBV) package, 2.9 mm × 1.6 mm × 1.45 mm, with gull-wing leads and Q3 pin-1 orientation per tape-and-reel standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference and substrate connection - must be tied directly to system ground plane. |
| 2 | GND | Second ground terminal - improves noise immunity and thermal dissipation in high-temp operation. |
| 3 | RESET | Active-low open-drain output - requires external pull-up; sinks 3.2 mA minimum at VTH min. |
| 4 | MR | Manual reset input - internally pulled up to VCC via 22 kΩ; asserts reset when pulled below 0.8V. |
| 5 | VCC | Positive supply input - accepts 1.0V–5.5V; powers internal comparators and timer circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63V threshold | Factory-trimmed to ±0.09V - eliminates need for external resistor divider in 5V system monitoring. |
| 190 ms reset timeout | Guaranteed minimum 100 ms with 190 ms typical - meets Intel-compatible reset timing requirements. |
| Low 6 µA supply current | Enables >10-year battery life in remote solar telemetry nodes powered by coin cells or supercaps. |
| VCC ≥1V RESET validity | Ensures deterministic reset behavior during deep brownouts - prevents undefined µP state transitions. |
| 22 kΩ internal MR pull-up | Reduces BOM count and PCB area - eliminates external pull-up resistor in most manual reset implementations. |
Applications
| Solar Inverter Control | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors DC-link voltage in string inverters during partial shading or grid fault events. IC Role / Device Role / Timing Role: Supervisory reset generator ensuring safe shutdown and clean restart of DSP-based PWM controllers. Use Value: Prevents erratic gate drive signals during 5V rail sag by asserting RESET within 20 µs of VCC crossing 4.54V. | Use Scenario: Provides power-on and brownout reset for ARM Cortex-M7-based I/O processors in harsh factory environments. IC Role / Device Role / Timing Role: System-level voltage supervisor coordinating FPGA, ADC, and communication interface initialization. Use Value: Guarantees 190 ms reset hold time across −40°C to +125°C, eliminating cold-start failures in unheated enclosures. |
| Battery-Backed Data Logger | Smart Energy Meter |
Use Scenario: Maintains reliable reset signaling during switchover from mains to backup LiFePO₄ battery (3.0–5.5V range). IC Role / Device Role / Timing Role: Dual-role supervisor - monitors main 5V rail and validates backup power integrity before releasing RESET. Use Value: 6 µA quiescent current extends 10-year battery life; MR pin enables field-initiated firmware update resets. | Use Scenario: Ensures deterministic startup of metrology SoC after power restoration following utility outages. IC Role / Device Role / Timing Role: Precision reset source synchronized to AC zero-crossing detection circuitry. Use Value: 4.63V threshold rejects ripple-induced false resets while triggering reliably at 4.50V - matching ANSI C12.1 voltage sag thresholds. |
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 −40°C to +85°C rating and 10 µA ICC - lacks extended temperature qualification. | Not suitable for under-hood or outdoor solar electronics requiring full −40°C to +125°C operation. | Select MAX811TEUS+T only for commercial-grade indoor applications where ambient stays <85°C. |
| TPS3808G33DBVR | 3.3V threshold variant; adjustable version available - no 4.63V fixed option; 1.5 µA ICC, but requires external RSET for timing. | Requires redesign of threshold network and timing components - not drop-in for 5V rail monitoring. | Choose TPS3808G33DBVR only when design flexibility (adjustable threshold/timing) outweighs BOM simplicity and guaranteed 4.63V accuracy. |
Compared with MAX811TEUS+T and TPS3808G33DBVR, SM72240MF-4.63/NOPB uniquely combines renewable-energy-grade temperature range, factory-trimmed 4.63V threshold, and zero-component manual reset - making it optimal for cost-sensitive, high-reliability 5V solar and industrial control systems.
Availability
SM72240MF-4.63/NOPB is available at Aetrix Electronics and suitable for solar inverter control, industrial PLC modules, and battery-backed data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SM72240MF-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 for industrial, automotive, and renewable energy markets.
The SM72240 product line was developed specifically for high-reliability power supervision in photovoltaic generation systems - emphasizing precision threshold stability, wide temperature operation, and ultra-low power consumption.
FAQ
What is the exact reset threshold voltage of the SM72240MF-4.63/NOPB?
The SM72240MF-4.63/NOPB has a factory-programmed reset threshold of 4.63V, with a guaranteed range of 4.54V to 4.75V across −40°C to +125°C. This value is laser-trimmed during production and specified in the Electrical Characteristics table of the SNIS154C datasheet. The 4.63V threshold is optimized for reliable monitoring of nominal 5V supplies in solar and industrial applications.
Does the SM72240MF-4.63/NOPB require an external pull-up resistor on the RESET pin?
Yes, the SM72240MF-4.63/NOPB features an active-low open-drain RESET output and requires an external pull-up resistor to a valid logic supply (up to 5.5V). A 100 kΩ resistor is recommended for general use; values must ensure sink current stays below 10 mA when RESET is asserted and leakage voltage drop remains negligible. No internal pull-up exists on the RESET pin.
Can the SM72240MF-4.63/NOPB operate with supply voltages below 5V?
Yes, the SM72240MF-4.63/NOPB operates from VCC = 1.0V to 5.5V and maintains valid RESET output down to VCC ≥1V. However, its 4.63V reset threshold means it is intended for monitoring 5V nominal rails - it will assert RESET whenever VCC falls below 4.54V, regardless of whether the supply is 5V, 4.8V, or 5.2V. Operation below 4.54V disables supervised functionality.
What is the purpose of the dual GND pins (pins 1 and 2) on the SM72240MF-4.63/NOPB?
Pins 1 and 2 on the SM72240MF-4.63/NOPB are both connected to the device substrate and serve as dedicated ground terminals. This dual-GND configuration improves thermal dissipation and reduces ground bounce in noisy environments like solar inverters. Both pins must be connected to the same low-impedance system ground plane - splitting or isolating them degrades noise immunity and timing accuracy.
Is the SM72240MF-4.63/NOPB pin-compatible with the MAX811 series?
The SM72240MF-4.63/NOPB shares the same 5-pin SOT-23 (DBV) footprint and pinout (GND/GND/RESET/MR/VCC) as the MAX811/812 family, and TI explicitly states compatibility in the datasheet. However, differences exist in reset timeout (190 ms typical vs. 140 ms for MAX811), temperature range (−40°C to +125°C vs. −40°C to +85°C), and MR input characteristics - validation in the target application is required before substitution.
SM72240MF-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
SM72240MF-4.63/NOPB FAQ
1.How can I place an order for SM72240MF-4.63/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for SM72240MF-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 SM72240MF-4.63/NOPB reliable?
The price and inventory of SM72240MF-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 SM72240MF-4.63/NOPB is usually 5 days.
3.What payment methods are accepted for SM72240MF-4.63/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM72240MF-4.63/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM72240MF-4.63/NOPB?
SM72240MF-4.63/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM72240MF-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 SM72240MF-4.63/NOPB?
For technical support, including SM72240MF-4.63/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM72240MF-4.63/NOPB requirements.
6.How does Aetrix verify that SM72240MF-4.63/NOPB is sourced from the original manufacturer or authorized distributors?
All SM72240MF-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 SM72240MF-4.63/NOPB meets industry standards.
7.What is the process for return or replacement of SM72240MF-4.63/NOPB?
All SM72240MF-4.63/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with SM72240MF-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 SM72240MF-4.63/NOPB part is unused and in its original packaging.
Return procedure for SM72240MF-4.63/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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