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Texas Instruments LM3723IM5-3.08/NOPB
- Part No.:
- LM3723IM5-3.08/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM3723IM5-3.08/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,455
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Product details
Overview
LM3723IM5-3.08/NOPB from Texas Instruments is an active-high, push-pull microprocessor reset supervisor IC designed for 3.3V supply monitoring in embedded systems. It asserts a precise 3.08V threshold reset when VCC drops below specification, maintains reset for ≥100ms after recovery (190ms typical), guarantees valid output down to VCC ≥1V, and draws only 7µA typical supply current. It is used in portable battery-powered controllers requiring reliable power-on initialization.
For engineers reviewing the LM3723IM5-3.08/NOPB datasheet, LM3723IM5-3.08/NOPB pinout, LM3723IM5-3.08/NOPB application, or LM3723IM5-3.08/NOPB equivalent, key selection criteria include its 3.08V reset threshold accuracy (±1.5% over −40°C to +85°C), active-high push-pull output drive capability, manual reset (MR) debounce with 22kΩ internal pull-up, guaranteed operation at VCC ≥1V, and SOT-23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The LM3723IM5-3.08/NOPB implements a precision bandgap reference (1.225V) feeding a comparator that monitors VCC against a factory-trimmed 3.08V threshold. Its reset logic includes a one-shot timer ensuring ≥100ms minimum active period after VCC recovery, with 190ms typical timeout.
It features fully debounced MR input with 2µs propagation delay, 10µs minimum pulse width requirement, and 100ns glitch immunity. The active-high RESET output is push-pull, capable of sourcing 500µA and sinking 1.2mA while maintaining VOH ≥0.8VCC and VOL ≤0.3V at VCC = VTH min.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±1.5% over −40°C to +85°C - precisely monitors 3.3V nominal supplies within industry-standard tolerance bands. |
| Reset Timeout | 100–560ms (min–max), 190ms typical - ensures sufficient microprocessor initialization time after power stabilization. |
| Supply Current | 7µA typical at VCC = 3.6V - enables ultra-low-power operation in battery-backed or energy-sensitive applications. |
| Output Type | Active-high push-pull - eliminates need for external pull-up resistor and supports direct connection to µP reset pins. |
| VCC Operating Range | 1.0V to 5.5V - guarantees functional reset assertion even during deep brownout conditions before full system power collapse. |
| MR Input | Internally pulled up to VCC via 22kΩ - simplifies manual reset implementation with momentary switch to GND. |
| Temperature Range | −40°C to +85°C (Industrial grade) - validated for use in commercial and industrial ambient environments. |
Pinout & Package
SOT-23-5 (DBV) package: 2.9mm × 1.6mm × 1.15mm body, gull-wing leads, RoHS-compliant green finish (CU SN), MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference and substrate connection - must be tied directly to system ground plane for stable reset threshold and noise immunity. |
| 2 | MR | Manual Reset input - active-low, internally pulled up; pulling below 0.25×VCC for >10µs initiates reset with 2µs propagation delay. |
| 3 | RESET | Active-high push-pull output - drives high during reset assertion; sinks 1.2mA/0.3V max, sources 500µA/0.8VCC min at VCC = VTH min. |
| 4 | GND | Second ground terminal - electrically connected to Pin 1 internally; improves thermal dissipation and reduces ground bounce. |
| 5 | VCC | Supply voltage input - accepts 1.0V–5.5V; powers internal reference, comparators, and output driver; bypass capacitor required. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.08V reset threshold | Factory-trimmed to ±1.5% over temperature - eliminates external resistor networks and ensures consistent 3.3V supply monitoring across production lots. |
| Guaranteed reset validity down to VCC = 1V | RESET output remains functional and rail-to-rail compliant even as supply collapses - prevents undefined µP states during brownout recovery. |
| Integrated MR pull-up resistor | 22kΩ internal pull-up - reduces BOM count and PCB footprint by eliminating discrete pull-up component for manual reset switches. |
| Power supply transient immunity | Rejects VCC glitches ≤125mV below threshold lasting ≤40µs - prevents spurious resets from switching noise or ESD-induced supply dips. |
| Low 7µA supply current | Enables multi-year battery life in always-on supervisory roles - critical for portable instrumentation and remote sensor nodes. |
Applications
| Industrial Controller Power Sequencing | Portable Medical Device Boot Integrity |
|---|---|
Use Scenario: A programmable logic controller (PLC) module powers up from a 3.3V LDO; voltage may sag during cold start or under load transients. IC Role / Device Role / Timing Role: LM3723IM5-3.08/NOPB monitors VCC and holds the ARM Cortex-M4 processor in reset until 3.3V stabilizes above 3.08V and remains valid for 190ms. Use Value: Prevents corrupted firmware execution during marginal power conditions, ensuring deterministic boot sequence and I/O initialization. |
Use Scenario: A handheld glucose meter uses a coin-cell battery; supply voltage decays gradually during extended use, risking incomplete self-test on power-up. IC Role / Device Role / Timing Role: LM3723IM5-3.08/NOPB asserts active-high RESET until VCC exceeds 3.08V and sustains it for ≥100ms, enabling full ADC calibration and display initialization. Use Value: Guarantees clinical-grade reliability by eliminating boot failures due to low-battery brownout, meeting IEC 60601-1 safety requirements. |
| Smart Energy Meter MCU Supervision | Automotive Body Control Module (BCM) Subsystem |
Use Scenario: An electricity meter's communication SoC powers from a 3.3V isolated DC-DC converter subject to line surges and ripple. IC Role / Device Role / Timing Role: LM3723IM5-3.08/NOPB continuously supervises VCC and triggers reset on any drop below 3.08V, including slow decay or fast transients. Use Value: Maintains secure firmware state and prevents EEPROM corruption during grid instability, supporting ANSI C12.22 compliance. |
Use Scenario: A BCM sub-module (e.g., window lift control) receives switched 3.3V from vehicle body electronics; experiences load dump and cold-crank events. IC Role / Device Role / Timing Role: LM3723IM5-3.08/NOPB provides robust reset signaling independent of main ECU, holding local MCU in reset during VCC dip below 3.08V. Use Value: Ensures fail-safe behavior without requiring CAN bus arbitration or centralized reset coordination, improving ASIL-B readiness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811SEUS+T | 3.08V threshold, active-low open-drain output, 14µA supply current, −40°C to +85°C | Requires external pull-up resistor; incompatible with direct active-high µP reset inputs without level translation | Select when open-drain flexibility or legacy MAX811 footprint compatibility is required; verify µP reset pin polarity match. |
| TPS3808G30DBVR | 3.0V threshold (±0.5%), active-high push-pull, 1.1µA quiescent current, −40°C to +125°C | Higher accuracy and lower current, but requires external MR pull-up and lacks integrated 22kΩ MR resistor | Select for extended temperature range or ultra-low-power designs where external MR biasing is acceptable. |
Compared with MAX811SEUS+T and TPS3808G30DBVR, the LM3723IM5-3.08/NOPB uniquely combines factory-trimmed 3.08V accuracy, active-high push-pull output, integrated MR pull-up, and industrial-temperature operation in a single SOT-23-5 device-reducing design complexity and validation effort for 3.3V system supervision.
Availability
LM3723IM5-3.08/NOPB is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, smart energy meters, and automotive body electronics requiring stable component supply with guaranteed long-term availability.
Supply support for LM3723IM5-3.08/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 emphasis on reliability, precision, and low-power design.
The LM372x family was engineered specifically for cost-sensitive, space-constrained microprocessor supervision in industrial and portable equipment-prioritizing accuracy, low quiescent current, and simplified manual reset integration.
FAQ
What is the exact reset threshold voltage of the LM3723IM5-3.08/NOPB?
The LM3723IM5-3.08/NOPB has a factory-trimmed reset threshold of 3.08V, specified with ±1.5% tolerance over the full industrial temperature range (−40°C to +85°C). This value is optimized for monitoring 3.3V nominal supplies and is confirmed in the Electrical Characteristics table of the SNVS154E datasheet under the LM372_-3.08 designation.
Does the LM3723IM5-3.08/NOPB require an external pull-up resistor on its RESET pin?
No, the LM3723IM5-3.08/NOPB does not require an external pull-up resistor on its RESET pin because it features an active-high push-pull output stage. Unlike open-drain variants (e.g., LM3724), this configuration actively drives both high and low states, enabling direct interface with microprocessors expecting active-high reset signals without additional components.
Can the LM3723IM5-3.08/NOPB operate reliably when VCC drops below 2.0V?
Yes, the LM3723IM5-3.08/NOPB guarantees functional RESET output down to VCC ≥1.0V, as stated in the Electrical Characteristics table. Its internal reference and comparator remain operational, and the push-pull output maintains valid VOH and VOL levels even at 1V supply-critical for brownout detection in battery-powered systems.
How is the manual reset (MR) pin debounced in the LM3723IM5-3.08/NOPB?
The LM3723IM5-3.08/NOPB incorporates internal hardware debouncing for the MR pin, including a 22kΩ internal pull-up resistor and 100ns glitch immunity. A low pulse on MR must exceed 10µs minimum width to trigger reset, and propagation delay from MR deassertion to RESET release is governed by the 190ms timeout timer-not by MR signal timing.
What package type and dimensions does the LM3723IM5-3.08/NOPB use?
The LM3723IM5-3.08/NOPB uses the SOT-23-5 (DBV) package: 2.9mm × 1.6mm × 1.15mm body size with gull-wing leads. It is RoHS-compliant with green (Pb-free, no Sb/Br) finish, CU SN lead termination, and JEDEC MSL Level-1 rating for unlimited floor life at ≤30°C/60% RH.
LM3723IM5-3.08/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:
- 3.08V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM3723IM5-3.08/NOPB FAQ
1.How can I place an order for LM3723IM5-3.08/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3723IM5-3.08/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 LM3723IM5-3.08/NOPB reliable?
The price and inventory of LM3723IM5-3.08/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3723IM5-3.08/NOPB is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3723IM5-3.08/NOPB transactions.
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LM3723IM5-3.08/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3723IM5-3.08/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 LM3723IM5-3.08/NOPB?
For technical support, including LM3723IM5-3.08/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3723IM5-3.08/NOPB requirements.
6.How does Aetrix verify that LM3723IM5-3.08/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3723IM5-3.08/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 LM3723IM5-3.08/NOPB meets industry standards.
7.What is the process for return or replacement of LM3723IM5-3.08/NOPB?
All LM3723IM5-3.08/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3723IM5-3.08/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 LM3723IM5-3.08/NOPB part is unused and in its original packaging.
Return procedure for LM3723IM5-3.08/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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