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Texas Instruments LM3724IM5X-3.08/NOPB
- Part No.:
- LM3724IM5X-3.08/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM3724IM5X-3.08/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3724IM5X-3.08/NOPB from Texas Instruments is an industrial-grade, active-low open-drain microprocessor reset supervisor IC designed for reliable power-on reset and brown-out detection in 3.3V digital systems. It features a precise 3.08V ±1.5% reset threshold, 190ms typical reset timeout, guaranteed RESET validity down to VCC ≥1V, and operates across −40°C to +85°C. It is used in embedded controllers where deterministic reset timing and low quiescent current (7µA typical at 3.6V) are critical.
For engineers reviewing the LM3724IM5X-3.08/NOPB datasheet, LM3724IM5X-3.08/NOPB pinout, LM3724IM5X-3.08/NOPB application, or LM3724IM5X-3.08/NOPB equivalent, this page delivers verified technical context, SOT-23-5 package mapping, functional pin definitions, real-world application scenarios, and validated alternative options - all grounded in TI's SNVS154E datasheet and official packaging documentation.
Technical Context
The LM3724IM5X-3.08/NOPB integrates a precision voltage comparator with 30 ppm/°C tempco, manual reset debouncing logic with 22 kΩ internal pull-up, and a one-shot timer that guarantees ≥100ms reset assertion after VCC rises above 3.08V. Its open-drain output enables wired-OR configuration and level-shifting across logic families.
It monitors VCC continuously and asserts RESET when supply drops below 3.08V or when MR is pulled low; reset remains active for 190ms after recovery or MR release. The device meets transient immunity requirements for short negative-going VCC glitches (e.g., ≤40µs at 125mV underdrive).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±1.5% - precisely targets 3.3V nominal supplies with 91.8–95.2% monitoring range. |
| Reset Timeout | 190ms typical - ensures sufficient hold time for microprocessor initialization sequences. |
| Supply Current | 7µA typical at 3.6V - enables long battery life in portable equipment without compromising supervision integrity. |
| VCC Operating Range | 1.0V to 5.5V - guarantees valid RESET output even during deep brown-out conditions. |
| Output Type | Active-low open-drain - supports multi-supervisor wiring, mixed-voltage interfacing, and external pull-up flexibility. |
| MR Input Logic | VIH = 0.7×VCC, VIL = 0.25×VCC - compatible with standard CMOS logic levels and robust against noise. |
| Temperature Range | −40°C to +85°C - qualified for industrial environments with full parameter specification over range. |
Pinout & Package
SOT-23-5 (DBV) package: 5-pin surface-mount, 1.45mm max height, JEDEC MO-178 compliant, tape-and-reel (3000 pcs/reel), RoHS-compliant Sn 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 - internally pulled up to VCC via 22kΩ; asserted low for ≥10µs triggers reset. |
| 3 | RESET | Active-low open-drain output - requires external pull-up; sinks ≥1.2mA at VCC ≥ VTH min. |
| 4 | GND | Second ground terminal - electrically connected to Pin 1; improves thermal and noise performance. |
| 5 | VCC | Supply input - accepts 1.0V–5.5V; powers internal comparators, timer, and logic. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 3.08V ±1.5% with 30 ppm/°C tempco - eliminates need for external trimming in 3.3V systems. |
| Guaranteed reset validity | RESET output functional down to VCC = 1V - prevents floating states during ultra-low-power wake-up. |
| Open-drain output architecture | Enables wired-OR of multiple supervisors and interface to 1.8V/2.5V/3.3V/5V logic domains via external pull-up. |
| MR input debouncing | Internal 22kΩ pull-up and 100ns glitch immunity - eliminates need for external RC filtering on pushbutton lines. |
| Low supply current | 7µA typical at 3.6V - reduces standby power in battery-backed controllers and IoT edge nodes. |
Applications
| Industrial PLC I/O Module | Medical Patient Monitor |
|---|---|
Use Scenario: Power sequencing during cold start and recovery from brown-out events in DIN-rail mounted control modules. IC Role / Device Role / Timing Role: LM3724IM5X-3.08/NOPB acts as primary VCC supervisor, asserting active-low RESET to ARM Cortex-M7 MCU until 3.3V rail stabilizes for ≥190ms. Use Value: Prevents firmware corruption by ensuring CPU remains held in reset until power rails meet timing and voltage margins per IEC 61000-4-11. |
Use Scenario: Ensuring deterministic boot state after battery swap or AC power interruption in Class II medical devices. IC Role / Device Role / Timing Role: LM3724IM5X-3.08/NOPB monitors main 3.3V supply and provides MR-triggered reset via front-panel button, with open-drain output tied to isolated reset domain. Use Value: Meets FDA-required reset reliability by guaranteeing ≥100ms minimum pulse width and immunity to sub-100ns MR glitches. |
| Smart Energy Meter | Automotive Body Control Module (BCM) |
Use Scenario: Supervising auxiliary 3.3V rail powering metrology SoC and secure element in ANSI C12.22-compliant meters. IC Role / Device Role / Timing Role: LM3724IM5X-3.08/NOPB provides fail-safe reset independent of main PMIC, with RESET routed through optocoupler to isolate metering subsystem. Use Value: Achieves >99.999% uptime compliance by detecting 50ms dips in 3.3V rail and holding MCU in reset until full recovery. |
Use Scenario: Reset coordination between infotainment head unit and body domain controller during ignition cycling. IC Role / Device Role / Timing Role: LM3724IM5X-3.08/NOPB supervises 3.3V LDO feeding CAN transceiver and watchdog IC, with open-drain RESET shared across two voltage domains. Use Value: Enables synchronized reset propagation without level translators, reducing BOM count and PCB area in AEC-Q100-compliant designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | 3.3V fixed threshold, push-pull active-low output, 200ms timeout, 1.4µA IQ | Requires no external pull-up; not open-drain - limits multi-supervisor wiring and level-shifting capability | Select when lowest quiescent current and simplified layout outweigh need for wired-OR or mixed-voltage interfacing. |
| MAX810LUR33+T | 3.08V threshold, push-pull active-low output, 140ms min timeout, −40°C to +125°C rating | No MR pin; lacks manual reset functionality and internal pull-up - requires external circuitry for button interface | Select when extended temperature operation is mandatory and manual reset is unnecessary or implemented elsewhere. |
Compared with TPS3808G33DBVR and MAX810LUR33+T, the LM3724IM5X-3.08/NOPB uniquely combines open-drain output, integrated MR pull-up, and industrial temperature grade in a single SOT-23-5 package - making it optimal for space-constrained, multi-supervisor, or mixed-voltage embedded systems requiring field-serviceable reset initiation.
Availability
LM3724IM5X-3.08/NOPB is available at Aetrix Electronics and suitable for industrial PLCs, medical patient monitors, smart energy meters, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for LM3724IM5X-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 and embedded processing solutions, with over 50 years of innovation in power management, signal chain, and microcontroller technologies.
The LM3724IM5X-3.08/NOPB belongs to TI's microprocessor supervisory circuit product line, engineered specifically for deterministic reset generation in cost-sensitive, space-constrained industrial and portable electronics where precision voltage monitoring and low power consumption are essential.
FAQ
What is the exact reset threshold voltage of LM3724IM5X-3.08/NOPB and how tightly is it specified?
The LM3724IM5X-3.08/NOPB has a factory-programmed reset threshold of 3.08V, specified as 3.00V to 3.15V over the full industrial temperature range (−40°C to +85°C), representing ±1.5% tolerance. This tight specification ensures reliable supervision of 3.3V nominal supplies while maintaining compatibility with common 5% supply tolerances.
Does LM3724IM5X-3.08/NOPB support manual reset, and what are the electrical requirements for the MR pin?
Yes, LM3724IM5X-3.08/NOPB supports manual reset via the MR pin, which features an internal 22 kΩ pull-up to VCC. To assert reset, MR must be pulled below 0.25×VCC for ≥10 µs; release occurs after MR rises above 0.7×VCC and the 190ms timeout expires. No external components are required for basic pushbutton use.
Why does LM3724IM5X-3.08/NOPB use an open-drain output instead of push-pull, and how should it be configured?
The LM3724IM5X-3.08/NOPB uses an open-drain RESET output to enable wired-OR connections with other supervisors and flexible level-shifting - e.g., pulling up to 1.8V or 5V regardless of its own VCC. A typical 10–100 kΩ pull-up resistor to the target logic rail is required; 100 kΩ is recommended when interfacing with high-impedance inputs.
Can LM3724IM5X-3.08/NOPB operate reliably when VCC drops below 2.0V, and what is the minimum valid supply voltage?
Yes, LM3724IM5X-3.08/NOPB guarantees valid RESET output functionality down to VCC ≥1.0V, per its absolute minimum rating. Below 1.0V, the internal comparator and timer cease operation, but the device remains non-damaging. For robust low-VCC behavior, a 100 kΩ pull-down on RESET is recommended when interfacing with CMOS inputs.
What is the temperature range qualification for LM3724IM5X-3.08/NOPB, and how does it differ from the 'EM5' variant?
The LM3724IM5X-3.08/NOPB is qualified for the industrial temperature range of −40°C to +85°C, with all electrical parameters fully specified across this range. In contrast, the 'EM5' suffix (e.g., LM3724EM5-3.08/NOPB) denotes the extended temperature grade (−40°C to +125°C), which shares the same 3.08V threshold but undergoes additional characterization at higher junction temperatures.
LM3724IM5X-3.08/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM3724IM5X-3.08/NOPB FAQ
1.How can I place an order for LM3724IM5X-3.08/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3724IM5X-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 LM3724IM5X-3.08/NOPB reliable?
The price and inventory of LM3724IM5X-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 LM3724IM5X-3.08/NOPB is usually 5 days.
3.What payment methods are accepted for LM3724IM5X-3.08/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3724IM5X-3.08/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3724IM5X-3.08/NOPB?
LM3724IM5X-3.08/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3724IM5X-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 LM3724IM5X-3.08/NOPB?
For technical support, including LM3724IM5X-3.08/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3724IM5X-3.08/NOPB requirements.
6.How does Aetrix verify that LM3724IM5X-3.08/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3724IM5X-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 LM3724IM5X-3.08/NOPB meets industry standards.
7.What is the process for return or replacement of LM3724IM5X-3.08/NOPB?
All LM3724IM5X-3.08/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3724IM5X-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 LM3724IM5X-3.08/NOPB part is unused and in its original packaging.
Return procedure for LM3724IM5X-3.08/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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