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Texas Instruments LM3724IM5X-4.63
- Part No.:
- LM3724IM5X-4.63
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM3724IM5X-4.63.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,780
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Product details
Overview
LM3724IM5X-4.63 from Texas Instruments is a precision 5-pin microprocessor reset supervisor IC with active-low open-drain RESET output, factory-trimmed 4.63 V reset threshold, 190 ms typical reset timeout, and guaranteed operation down to VCC ≥ 1 V. It monitors 5 V supply rails in embedded controllers and portable systems requiring reliable power-on reset and brown-out protection.
For engineers reviewing the LM3724IM5X-4.63 datasheet, LM3724IM5X-4.63 pinout, LM3724IM5X-4.63 application, or LM3724IM5X-4.63 equivalent, this page delivers verified specifications, SOT-23-5 package details, manual reset (MR) timing behavior, open-drain interface constraints, and validated alternatives for industrial-grade microprocessor supervision.
Technical Context
The LM3724IM5X-4.63 integrates a precision voltage comparator with 4.63 V ±1.5% threshold, internal 1.225 V reference, and one-shot timer circuitry that guarantees minimum 100 ms and typical 190 ms active-reset duration after VCC rises above threshold. Its MR input features 22 kΩ internal pull-up and 10 µs minimum pulse width immunity.
As an open-drain device, LM3724IM5X-4.63 requires an external pull-up resistor (typically 10–100 kΩ) to a logic rail independent of VCC-enabling level-shifting and wired-OR reset bus configurations. It operates across −40°C to +85°C and draws only 8 µA typical supply current at 5.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63 V ±1.5% - precisely monitors 5 V nominal supplies within 90.8–94.4% tolerance band |
| Reset Timeout | 190 ms typical - ensures sufficient microprocessor initialization time after power stabilization |
| Supply Current | 8 µA typical at 5.5 V - enables multi-year battery life in portable equipment |
| VCC Operating Range | 1.0 V to 5.5 V - guarantees valid RESET output even during deep brown-out conditions |
| MR Input Logic | VIH = 0.7×VCC, VIL = 0.25×VCC - compatible with standard CMOS logic levels |
| Output Type | Active-low open-drain - supports multi-source reset buses and mixed-voltage system interfacing |
| Temperature Range | −40°C to +85°C - qualified for industrial ambient environments |
Pinout & Package
SOT-23-5 (DBV) package: 2.9 mm × 1.6 mm × 1.45 mm body, gull-wing leads, tape-and-reel packaging (3000 pcs/reel), RoHS-compliant matte tin lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference and substrate connection - must be tied directly to system ground plane |
| 2 | MR | Manual reset input - active-low, internally pulled up to VCC via 22 kΩ; asserts reset when pulled below 0.25×VCC |
| 3 | RESET | Active-low open-drain output - sinks current when asserted; requires external pull-up to logic rail |
| 4 | GND | Second ground terminal - electrically connected to Pin 1; improves noise immunity and thermal dissipation |
| 5 | VCC | Supply input - accepts 1.0 V to 5.5 V; powers internal comparators, reference, and timing circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63 V threshold | Factory-trimmed ±1.5% over temperature - eliminates need for external resistor dividers in 5 V monitoring |
| Open-drain RESET output | Enables wired-OR reset busing and level translation - pull-up can be connected to any rail ≤5.5 V |
| Guaranteed operation down to VCC = 1 V | Ensures deterministic reset assertion during deep undervoltage - prevents undefined µP states |
| 22 kΩ internal MR pull-up | Reduces BOM count - eliminates external pull-up resistor for basic manual reset functionality |
| 100 ns MR glitch immunity | Rejects EMI-induced noise on reset button lines - prevents spurious resets in noisy industrial environments |
Applications
| Industrial PLC Controller | Portable Medical Monitor |
|---|---|
Use Scenario: Power sequencing and brown-out recovery in DIN-rail mounted programmable logic controllers operating in factory-floor environments with fluctuating 24 VDC-derived 5 V rails. IC Role / Device Role / Timing Role: Supervisory reset generator asserting active-low signal to ARM Cortex-M7 MCU upon VCC drop below 4.63 V or MR activation. Use Value: Prevents corrupted firmware execution during line sags; 190 ms timeout ensures full register initialization before code fetch. | Use Scenario: Battery-backed vital signs monitor requiring fail-safe boot sequence after cold start or low-battery wake-up. IC Role / Device Role / Timing Role: Primary reset source for ultra-low-power MSP430F6779A, triggered by 5 V LDO output and front-panel reset button. Use Value: 8 µA quiescent current extends single-cell Li-ion runtime; open-drain output interfaces cleanly to 1.8 V logic domain via 10 kΩ pull-up. |
| Network Edge Router | Smart Energy Meter |
Use Scenario: Dual-rail supervision (5 V core, 3.3 V I/O) in carrier-class Ethernet routers where reset coordination across multiple ASICs is critical. IC Role / Device Role / Timing Role: Dedicated 5 V supervisor for management processor; RESET output wired-OR'd with other LM3724 units on shared reset bus. Use Value: Open-drain architecture avoids contention; 4.63 V threshold aligns with ATX-spec 5 V tolerance limits (±5%). | Use Scenario: Tamper-resistant electricity meter with isolated communication interface and secure bootloader validation. IC Role / Device Role / Timing Role: Reset initiator for secure element and metrology SoC, asserting reset during AC mains dropout or backup capacitor discharge. Use Value: Valid RESET output down to VCC = 1 V ensures deterministic state capture before power collapse; −40°C to +85°C rating supports outdoor deployment. |
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 | 4.63 V threshold, push-pull active-low RESET, 140 ms min timeout, 1.2 µA max ICC at 3.6 V | Requires PCB-level pull-up removal; no MR glitch immunity spec; not qualified for >85°C | Preferred where lowest quiescent current is critical and industrial temperature range is not required |
| TPS3808G33DBVR | 3.3 V threshold (not 4.63 V), adjustable timeout via capacitor, 1.8 µA typical ICC, −40°C to +125°C | Cannot replace LM3724IM5X-4.63 without redesigning voltage monitoring network | Select only if system uses 3.3 V supply supervision and requires timeout customization |
Compared with MAX811TEUS+T, LM3724IM5X-4.63 offers superior temperature range and MR robustness but higher supply current; versus TPS3808G33DBVR, it provides exact 4.63 V threshold without external components but fixed timing.
Availability
LM3724IM5X-4.63 is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, network edge equipment, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM3724IM5X-4.63 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
LM3724IM5X-4.63 belongs to TI's microprocessor supervisory IC product line, engineered specifically for high-accuracy, low-power reset generation in space-constrained industrial and portable systems with strict reliability requirements.
FAQ
What is the exact reset threshold voltage of LM3724IM5X-4.63?
The LM3724IM5X-4.63 has a factory-programmed reset threshold of 4.63 V with ±1.5% tolerance over the full −40°C to +85°C operating range. This value is laser-trimmed during production and specified in the Electrical Characteristics table of the SNVS154E datasheet under VTH parameter for LM372_-4.63 variants.
Does LM3724IM5X-4.63 require an external pull-up resistor on the RESET pin?
Yes, LM3724IM5X-4.63 features an active-low open-drain RESET output and requires an external pull-up resistor. Typical values range from 10 kΩ to 100 kΩ connected to a logic rail (≤5.5 V). The resistor value must ensure sink current remains below 10 mA when RESET is asserted, as specified in the Applications Information section of the LM3724IM5X-4.63 datasheet.
Can LM3724IM5X-4.63 operate with VCC below 2.5 V?
Yes, LM3724IM5X-4.63 is fully functional with VCC as low as 1.0 V. Its RESET output remains valid down to this level, enabling reliable brown-out detection in systems with wide-input DC/DC converters or battery discharge profiles. However, VOL and VOH specifications apply only when VCC exceeds the reset threshold voltage (4.63 V).
What is the function of the MR pin on LM3724IM5X-4.63?
The MR (Manual Reset) pin on LM3724IM5X-4.63 is an active-low input with internal 22 kΩ pull-up to VCC. Pulling MR below 0.25×VCC for ≥10 µs initiates a reset pulse lasting 190 ms. It supports debounced push-button interfaces and daisy-chained supervision without external components, as confirmed in the PIN DESCRIPTIONS and MANUAL RESET INPUT sections of the LM3724IM5X-4.63 datasheet.
Is LM3724IM5X-4.63 pin-compatible with LM3722 or LM3723?
Yes, LM3724IM5X-4.63 shares identical SOT-23-5 pinout and footprint with LM3722 and LM3723, including GND (Pin 1), MR (Pin 2), RESET (Pin 3), GND (Pin 4), and VCC (Pin 5). However, output behavior differs: LM3722 uses active-low push-pull, LM3723 active-high push-pull, while LM3724IM5X-4.63 uses active-low open-drain - requiring schematic review before substitution.
LM3724IM5X-4.63 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM3724IM5X-4.63 FAQ
1.How can I place an order for LM3724IM5X-4.63 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3724IM5X-4.63 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 LM3724IM5X-4.63 reliable?
The price and inventory of LM3724IM5X-4.63 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3724IM5X-4.63 is usually 5 days.
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LM3724IM5X-4.63 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3724IM5X-4.63 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 LM3724IM5X-4.63?
For technical support, including LM3724IM5X-4.63 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3724IM5X-4.63 requirements.
6.How does Aetrix verify that LM3724IM5X-4.63 is sourced from the original manufacturer or authorized distributors?
All LM3724IM5X-4.63 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 LM3724IM5X-4.63 meets industry standards.
7.What is the process for return or replacement of LM3724IM5X-4.63?
All LM3724IM5X-4.63 units undergo pre-shipment inspection (PSI). If there is an issue with LM3724IM5X-4.63, 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 LM3724IM5X-4.63 part is unused and in its original packaging.
Return procedure for LM3724IM5X-4.63:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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