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Texas Instruments LM3723EM5-2.32/NOPB
- Part No.:
- LM3723EM5-2.32/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM3723EM5-2.32/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,949
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Product details
Overview
LM3723EM5-2.32/NOPB from Texas Instruments is a precision active-high microprocessor reset supervisor IC in SOT-23-5 package, monitoring 2.5V supply rails with 2.32V ±10mV threshold, 190ms typical reset timeout, guaranteed RESET validity down to VCC ≥1V, and 6µA typical supply current. It provides power-on, brown-out, and manual reset functionality for embedded microcontroller systems requiring stable initialization.
For engineers reviewing the LM3723EM5-2.32/NOPB datasheet, LM3723EM5-2.32/NOPB pinout, LM3723EM5-2.32/NOPB application, or LM3723EM5-2.32/NOPB equivalent, key selection criteria include reset polarity (active-high), temperature range (−40°C to +125°C), SOT-23-5 footprint compatibility, low-quiescent-current operation, and precise 2.32V threshold for 2.5V rail supervision.
Technical Context
The LM3723EM5-2.32/NOPB integrates a precision voltage reference (1.225V), dual comparators (supply monitor and manual reset), reset logic with one-shot timer, and push-pull output driver. Its internal 22kΩ MR pull-up enables direct switch interfacing without external components.
It operates across VCC = 1.0V to 5.5V, asserts RESET high during undervoltage conditions and for 190ms after VCC recovers above 2.32V, and rejects transients ≤100ns on MR and ≤40µs at 125mV overdrive on VCC - all specified over −40°C to +125°C extended industrial range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.32V ±10mV - precisely monitors 2.5V nominal supplies within 90.8–94.8% tolerance band |
| Reset Timeout | 190ms typical - ensures sufficient microprocessor initialization time after power recovery |
| Supply Current | 6µA typical at VCC = 2.5V - enables use in battery-powered and ultra-low-power systems |
| VCC Range | 1.0V to 5.5V - guarantees functional RESET output even during deep brown-out down to 1V |
| Output Type | Active-high push-pull - drives logic-high RESET directly without external pull-up resistor |
| MR Input | Internal 22kΩ pull-up - supports momentary switch connection with no external biasing required |
| Operating Temp | −40°C to +125°C - qualified for extended industrial environments including automotive under-hood |
Pinout & Package
SOT-23-5 (DBV) package: 2.9mm × 1.6mm × 1.15mm body, gull-wing leads, RoHS-compliant green finish (Pb-free, no Sb/Br), moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference and substrate connection - must be tied to system ground plane for stable reference |
| 2 | MR | Manual reset input - internally pulled up to VCC; pulling below 0.25×VCC for >100ns triggers reset |
| 3 | RESET | Active-high push-pull output - drives high during fault and for 190ms post-recovery; sinks/source up to 1.2mA |
| 4 | GND | Second ground terminal - improves noise immunity and thermal dissipation; connect to same ground net as Pin 1 |
| 5 | VCC | Supply input - accepts 1.0V–5.5V; bypass capacitor (0.1µF) required adjacent to pin for transient immunity |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.32V threshold | ±10mV tolerance ensures reliable detection of 2.5V rail collapse before microprocessor malfunction |
| 190ms reset timeout | Guarantees full microcontroller core and peripheral initialization before release of RESET signal |
| 6µA supply current | Enables multi-year operation from coin-cell batteries in portable instrumentation and IoT edge nodes |
| VCC ≥1V RESET validity | Maintains defined logic state during deep brown-out, preventing undefined processor behavior or latch-up |
| MR glitch immunity | Rejects noise spikes ≤100ns, eliminating false resets from EMI or mechanical switch bounce |
Applications
| Industrial PLC I/O Module | Medical Portable Monitor |
|---|---|
Use Scenario: Power sequencing in DIN-rail mounted programmable logic controller modules with isolated 2.5V FPGA configuration rails. IC Role / Device Role / Timing Role: Active-high reset supervisor ensuring FPGA and ARM Cortex-M4 initialize only after 2.5V rail stabilizes and remains valid during line sags. Use Value: Prevents partial configuration and metastability by enforcing 190ms hold time after 2.32V threshold crossing, compatible with TI C2000 real-time control timing budgets. |
Use Scenario: Battery-backed vital signs monitor with low-power ARM-based SoC and analog front-end powered from regulated 2.5V LDO. IC Role / Device Role / Timing Role: Primary reset source asserting active-high RESET during cold start, brown-out, and user-initiated recalibration. Use Value: 6µA quiescent current extends single CR2032 battery life beyond 3 years; 2.32V threshold aligns with 2.5V LDO dropout margin under load. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Under-hood BCM with wide-temperature 2.5V sensor interface rail subject to load dump and cold-crank transients. IC Role / Device Role / Timing Role: Extended-temp (−40°C to +125°C) reset supervisor validating 2.5V supply integrity before enabling CAN transceiver and LIN drivers. Use Value: Immunity to 40µs/125mV VCC transients eliminates spurious resets during alternator switching; SOT-23-5 footprint fits constrained PCB space. |
Use Scenario: Revenue-grade electricity meter with metrology SoC requiring deterministic boot after AC power interruption. IC Role / Device Role / Timing Role: Supervisory circuit monitoring backup 2.5V supercapacitor rail during mains outage, triggering controlled shutdown and RTC preservation. Use Value: Guaranteed RESET validity down to VCC = 1V prevents corruption of flash memory writes during final energy depletion phase. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811TEUS+T | 2.32V threshold, active-low open-drain output, 140ms min timeout, −40°C to +85°C | Requires external pull-up; not rated for +125°C operation; lower transient immunity | Select when cost-sensitive designs accept reduced temperature range and need open-drain flexibility |
| TPS3808G125DBVR | 2.35V threshold, active-high push-pull, 200ms timeout, −40°C to +125°C, 1.6µA IQ | Lower supply current but tighter 2.35V threshold; different pinout (SOT-23-6); no internal MR pull-up | Select when ultra-low IQ dominates design priority and board layout allows SOT-23-6 footprint change |
Compared with MAX811TEUS+T, LM3723EM5-2.32/NOPB offers extended temperature rating and push-pull drive; compared with TPS3808G125DBVR, it provides integrated MR pull-up and exact 2.32V match but higher quiescent current - critical for legacy 2.5V rail compliance.
Availability
LM3723EM5-2.32/NOPB is available at Aetrix Electronics and suitable for industrial PLCs, portable medical devices, automotive body controllers, and smart energy meters requiring stable component supply with long lifecycle assurance.
Supply support for LM3723EM5-2.32/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 reliability, precision, and industrial-grade qualification.
The LM372x series was designed specifically for microprocessor power-supply supervision in harsh environments, targeting applications demanding accurate voltage thresholds, extended temperature operation, and minimal external components.
FAQ
What is the reset output polarity of LM3723EM5-2.32/NOPB?
The LM3723EM5-2.32/NOPB features an active-high push-pull RESET output. It drives high whenever VCC falls below 2.32V and maintains that state for 190ms after VCC rises above the threshold. This eliminates the need for an external pull-up resistor, simplifying PCB layout versus open-drain alternatives like the LM3724. The output is fully specified from −40°C to +125°C.
Does LM3723EM5-2.32/NOPB support manual reset functionality?
Yes, LM3723EM5-2.32/NOPB includes a dedicated MR (Manual Reset) input with internal 22kΩ pull-up to VCC. Pulling MR below 0.25×VCC for more than 100ns initiates a reset pulse lasting 190ms after MR returns high. This enables direct connection to a momentary switch without external biasing, and the 100ns glitch immunity prevents false triggers from contact bounce.
What is the minimum VCC required for LM3723EM5-2.32/NOPB to assert a valid RESET signal?
LM3723EM5-2.32/NOPB guarantees valid RESET output for VCC ≥1V. Below 1V, the output may become indeterminate due to insufficient headroom for the internal comparator and driver circuitry. For applications requiring RESET validity down to 0V, a 100kΩ pull-down resistor on the RESET line is recommended per TI application guidance.
Is LM3723EM5-2.32/NOPB compatible with 3.3V or 5V supply rails?
No - LM3723EM5-2.32/NOPB is factory-trimmed for 2.32V threshold and optimized for monitoring 2.5V nominal supplies. Using it on 3.3V or 5V rails would result in premature or missed reset assertion. For those rails, select LM3723EM5-3.08/NOPB (3.08V) or LM3723EM5-4.63/NOPB (4.63V), respectively - all share identical SOT-23-5 packaging and functional architecture.
What package type and environmental compliance does LM3723EM5-2.32/NOPB use?
LM3723EM5-2.32/NOPB uses the SOT-23-5 (DBV) package with gull-wing leads, measuring 2.9mm × 1.6mm × 1.15mm. It is RoHS-compliant and classified as "Green" - meaning Pb-free, and free of bromine and antimony-based flame retardants. Moisture sensitivity level is 1 (unlimited floor life at ≤30°C/60% RH), qualified for standard 260°C lead-free reflow.
LM3723EM5-2.32/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- 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:
- 2.32V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM3723EM5-2.32/NOPB FAQ
1.How can I place an order for LM3723EM5-2.32/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3723EM5-2.32/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 LM3723EM5-2.32/NOPB reliable?
The price and inventory of LM3723EM5-2.32/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3723EM5-2.32/NOPB is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3723EM5-2.32/NOPB transactions.
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LM3723EM5-2.32/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3723EM5-2.32/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 LM3723EM5-2.32/NOPB?
For technical support, including LM3723EM5-2.32/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3723EM5-2.32/NOPB requirements.
6.How does Aetrix verify that LM3723EM5-2.32/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3723EM5-2.32/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 LM3723EM5-2.32/NOPB meets industry standards.
7.What is the process for return or replacement of LM3723EM5-2.32/NOPB?
All LM3723EM5-2.32/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3723EM5-2.32/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 LM3723EM5-2.32/NOPB part is unused and in its original packaging.
Return procedure for LM3723EM5-2.32/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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