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Texas Instruments LM3723EM5-4.63/NOPB
- Part No.:
- LM3723EM5-4.63/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM3723EM5-4.63/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,897
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Product details
Overview
LM3723EM5-4.63/NOPB from Texas Instruments is an active-high, push-pull microprocessor reset supervisor IC designed for 5V supply monitoring in embedded systems. It provides a factory-trimmed 4.63V reset threshold, 190ms typical reset timeout, guaranteed RESET validity down to VCC ≥1V, and operates across −40°C to +125°C. It is used in industrial controllers requiring reliable power-on initialization and brown-out recovery.
For engineers reviewing the LM3723EM5-4.63/NOPB datasheet, LM3723EM5-4.63/NOPB pinout, LM3723EM5-4.63/NOPB application, or LM3723EM5-4.63/NOPB equivalent, key selection criteria include reset threshold accuracy (±0.09V), extended temperature support (−40°C to +125°C), low 6µA supply current, active-high push-pull output drive capability, and SOT-23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The LM3723EM5-4.63/NOPB integrates a precision voltage reference (1.225V), dual comparators (reset and manual reset), and a one-shot timer to generate a minimum 100ms (190ms typical) active-high reset pulse. Its internal 22kΩ MR pull-up enables direct connection to logic-level switches without external components.
It features glitch immunity on both VCC (≥100ns rejection) and MR inputs, operates with full functionality at VCC as low as 1V, and maintains valid output voltage levels (VOH ≥0.8VCC, VOL ≤0.4V) across its full temperature and supply range - critical for deterministic reset assertion in automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±0.09V - precisely monitors 5V nominal supplies within 90.8–94.4% tolerance band |
| Reset Timeout | 100–560ms - ensures sufficient hold time for microprocessor core and peripheral initialization |
| Supply Current | 6µA typical at 25°C - enables multi-year battery life in portable instrumentation |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive and industrial control cabinet use |
| VCC Range | 1.0V to 5.5V - guarantees functional reset assertion even during deep brown-out conditions |
| Output Type | Active-high push-pull - drives CMOS/TTL loads directly without external pull-up resistor |
| MR Input | Internal 22kΩ pull-up - supports momentary switch interface with no external components |
Pinout & Package
LM3723EM5-4.63/NOPB is housed in a 5-pin SOT-23 (DBV) package, measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and RoHS-compliant matte tin (CuSn) finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference and substrate connection - must be tied to system ground plane for stable comparator operation |
| 2 | MR | Manual reset input - active-low; internally pulled up to VCC; asserts reset when pulled below 0.25×VCC |
| 3 | RESET | Active-high push-pull output - drives high during reset; sinks current when low; valid for VCC ≥1V |
| 4 | GND | Second ground terminal - improves noise immunity and thermal dissipation in high-reliability applications |
| 5 | VCC | Supply input - accepts 1.0V to 5.5V; powers internal reference, comparators, and output stage |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63V threshold | Factory-trimmed to ±0.09V over −40°C to +125°C - eliminates need for external resistor divider calibration |
| Extended temperature grade | Rated for −40°C to +125°C operation - suitable for engine control units and industrial PLCs |
| Low 6µA supply current | Enables continuous supervision in always-on battery-backed systems without measurable drain |
| VCC ≥1V reset validity | Ensures deterministic reset behavior during deep undervoltage events before complete power collapse |
| 22kΩ internal MR pull-up | Reduces BOM count by eliminating external pull-up resistor for pushbutton reset interfaces |
Applications
| Industrial Motor Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 5V rail powering MCU, CAN transceiver, and I/O drivers in motor drive cabinets exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Active-high reset supervisor asserting controlled startup after AC line restoration or brown-out recovery. Use Value: Prevents erratic MCU boot sequences caused by marginal VCC; 190ms timeout ensures gate driver ICs and analog front-ends stabilize before firmware execution. | Use Scenario: Supervises 5V supply in BCM modules managing door locks, lighting, and window controls in passenger compartments. IC Role / Device Role / Timing Role: Provides power-on reset and manual reset via dashboard switch, with glitch immunity against load-dump transients. Use Value: 100ns MR glitch immunity prevents false resets during ignition switching; extended temp rating supports operation near HVAC ducts. |
| Portable Medical Monitor | Smart Energy Meter |
Use Scenario: Powers ARM-based data acquisition subsystem in handheld ECG/SpO₂ devices running from Li-ion battery with buck-boost regulator. IC Role / Device Role / Timing Role: Ensures clean boot after battery insertion or low-battery recovery, with minimal quiescent current impact on runtime. Use Value: 6µA supply current extends battery life by >2 years in standby; 4.63V threshold aligns with regulated 5V rail tolerance in medical-grade DC/DC converters. | Use Scenario: Supervises isolated 5V supply feeding metrology SoC and RF communication module in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: Generates reset pulse during AC power restoration and supports remote firmware update reset via opto-isolated MR signal. Use Value: Internal 22kΩ MR pull-up simplifies isolation interface design; 125°C rating accommodates transformer-heated enclosures. |
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 | 4.63V threshold, active-low open-drain output, −40°C to +85°C rating, 1.6µA supply current | Lacks extended temperature support and active-high push-pull drive; requires external pull-up | Prefer for cost-sensitive consumer applications where 85°C max ambient suffices and open-drain flexibility is needed |
| TPS3808G33DBVR | 3.3V threshold, adjustable delay, −40°C to +125°C, 16µA supply current, enable input | Fixed 3.3V threshold unsuitable for 5V monitoring; higher current draw reduces battery life | Select only if redesigning to 3.3V system architecture and requiring programmable reset delay |
Compared with MAX811TEUS+T and TPS3808G33DBVR, LM3723EM5-4.63/NOPB uniquely delivers 4.63V precision monitoring, active-high push-pull output, and extended temperature operation in a single SOT-23-5 device - eliminating external components and enabling drop-in replacement in legacy 5V industrial designs.
Availability
LM3723EM5-4.63/NOPB is available at Aetrix Electronics and suitable for industrial motor controllers, automotive body control modules, portable medical monitors, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM3723EM5-4.63/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 specializing in analog, embedded processing, and connectivity technologies, with decades of experience in power management and supervisory IC design.
The LM372x family was engineered specifically for high-reliability microprocessor reset supervision in harsh environments, emphasizing precision threshold stability, ultra-low quiescent current, and extended temperature performance for industrial and automotive applications.
FAQ
What is the reset threshold voltage of LM3723EM5-4.63/NOPB?
The LM3723EM5-4.63/NOPB has a factory-programmed reset threshold of 4.63V, specified with ±0.09V tolerance over the full −40°C to +125°C operating range. This value is optimized for monitoring 5V nominal power rails and ensures reset assertion occurs between 90.8% and 94.4% of nominal supply voltage - critical for avoiding premature release during brown-out conditions. The threshold is derived from an internal 1.225V reference and laser-trimmed comparator circuitry.
Does LM3723EM5-4.63/NOPB support manual reset functionality?
Yes, LM3723EM5-4.63/NOPB includes a dedicated MR (Manual Reset) pin (Pin 2) with built-in 22kΩ pull-up to VCC. Pulling MR below 0.25×VCC for ≥10µs asserts the active-high RESET output for the full timeout period (100–560ms). The MR input rejects glitches ≤100ns and requires no external components - enabling direct connection to pushbuttons or logic signals in industrial HMI and automotive diagnostic interfaces.
What is the operating temperature range of LM3723EM5-4.63/NOPB?
LM3723EM5-4.63/NOPB is rated for operation from −40°C to +125°C, classified as an "Extended" temperature grade device. This specification is validated per the Electrical Characteristics table in the SNVS154E datasheet, where all parameters (including reset threshold, timeout, and supply current) are guaranteed across this full range. It is suitable for under-hood automotive, industrial control cabinets, and outdoor metering equipment where ambient temperatures exceed standard industrial limits.
Can LM3723EM5-4.63/NOPB operate with supply voltages below 5V?
Yes, LM3723EM5-4.63/NOPB functions across a VCC range of 1.0V to 5.5V. Its RESET output remains valid (VOH ≥0.8VCC, VOL ≤0.4V) down to VCC = 1V, enabling reliable reset assertion during deep brown-out events. However, the 4.63V reset threshold means it is intended for systems where the monitored 5V rail drops below that level - not for direct supervision of lower-voltage rails like 3.3V or 2.5V, for which LM3723 variants with 3.08V or 2.32V thresholds are specified.
What package type does LM3723EM5-4.63/NOPB use?
LM3723EM5-4.63/NOPB uses the SOT-23-5 (DBV) package: a 5-pin, gull-wing surface-mount outline measuring 2.9mm × 1.6mm × 1.1mm. It features RoHS-compliant matte tin (CuSn) lead finish, moisture sensitivity level (MSL) 1, and is supplied in 1000-unit tape-and-reel format. Pin 1 is marked with a dot; pin 1 quadrant is Q3 per TI's packaging documentation.
LM3723EM5-4.63/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:
- 4.63V
- 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
LM3723EM5-4.63/NOPB FAQ
1.How can I place an order for LM3723EM5-4.63/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3723EM5-4.63/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 LM3723EM5-4.63/NOPB reliable?
The price and inventory of LM3723EM5-4.63/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3723EM5-4.63/NOPB is usually 5 days.
3.What payment methods are accepted for LM3723EM5-4.63/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3723EM5-4.63/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3723EM5-4.63/NOPB?
LM3723EM5-4.63/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3723EM5-4.63/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 LM3723EM5-4.63/NOPB?
For technical support, including LM3723EM5-4.63/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3723EM5-4.63/NOPB requirements.
6.How does Aetrix verify that LM3723EM5-4.63/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3723EM5-4.63/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 LM3723EM5-4.63/NOPB meets industry standards.
7.What is the process for return or replacement of LM3723EM5-4.63/NOPB?
All LM3723EM5-4.63/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3723EM5-4.63/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 LM3723EM5-4.63/NOPB part is unused and in its original packaging.
Return procedure for LM3723EM5-4.63/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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