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Texas Instruments LM3724EM5X-4.63
- Part No.:
- LM3724EM5X-4.63
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM3724EM5X-4.63.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3724EM5X-4.63 from Texas Instruments is a precision 5-pin SOT-23 microprocessor reset supervisor IC with active-low open-drain RESET output, factory-programmed 4.63V reset threshold, 190 ms typical reset timeout, guaranteed operation down to VCC ≥1V, and −40°C to +125°C extended temperature range-used for reliable power-on reset in 5V microcontroller systems.
For engineers reviewing the LM3724EM5X-4.63 datasheet, LM3724EM5X-4.63 pinout, LM3724EM5X-4.63 application, or LM3724EM5X-4.63 equivalent, key selection criteria include open-drain output compatibility with mixed-voltage logic, manual reset debouncing capability, low 6 µA supply current, brown-out immunity, and industrial/automotive-grade thermal performance.
Technical Context
The LM3724EM5X-4.63 integrates a precision voltage reference (1.225V), dual comparator architecture (low-line and reset comparators), one-shot timer, and manual reset logic with internal 22 kΩ pull-up. Its open-drain RESET output enables wired-OR configuration and level-shifting across logic families.
It operates over VCC = 1.0V to 5.5V, asserts reset when VCC falls below 4.63V ±0.09V, maintains RESET low for ≥100 ms after VCC recovers, and provides glitch immunity on MR and VCC inputs-ensuring robust reset assertion during transient faults and cold-start conditions.
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 | 190 ms typical - ensures microprocessor initialization completes before release, exceeding minimum 100 ms requirement. |
| Supply Current | 6 µA typical at VCC = 5.5V - enables use in battery-powered and ultra-low-power embedded systems. |
| Operating Temp | −40°C to +125°C - qualified for extended-temperature industrial and automotive under-hood applications. |
| RESET Output | Active-low open-drain - supports multi-supervisor daisy-chaining and interface to 1.8V–5.5V logic without level shifters. |
| VCC Validity | RESET valid down to VCC ≥1V - guarantees deterministic reset state even during deep brown-out or partial power loss. |
| MR Input | Debounced with 22 kΩ internal pull-up - eliminates mechanical switch bounce and simplifies manual reset circuitry. |
Pinout & Package
SOT-23-5 (DBV) package: 2.9 mm × 1.6 mm × 1.1 mm body, gull-wing leads, RoHS-compliant green finish, moisture sensitivity 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 accuracy. |
| 2 | MR | Manual reset input - active-low, internally pulled up to VCC; asserts reset when pulled below 0.25×VCC for >10 µs. |
| 3 | RESET | Active-low open-drain output - requires external pull-up resistor (typically 10–100 kΩ) to target logic rail voltage. |
| 4 | GND | Second ground terminal - electrically connected to Pin 1 internally; improves noise immunity and thermal dissipation. |
| 5 | VCC | Supply input - accepts 1.0V to 5.5V; powers internal comparators, reference, and timing circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63V threshold | ±0.09V tolerance ensures reliable detection of 5V supply collapse without false triggers during ripple or load transients. |
| Open-drain RESET | Enables direct connection to shared reset bus with multiple supervisors or mixed-voltage peripherals (e.g., 3.3V MCU + 1.8V FPGA). |
| 190 ms reset timeout | Guarantees sufficient hold time for slow-starting oscillators and flash memory initialization sequences in microcontrollers. |
| 6 µA supply current | Reduces quiescent power draw in always-on subsystems such as real-time clocks or wake-on-event controllers. |
| −40°C to +125°C operation | Validated for engine control units, motor drives, and industrial PLCs where ambient temperatures exceed standard commercial range. |
Applications
| Industrial Motor Control | Automotive Body Controller |
|---|---|
Use Scenario: Reset supervision for ARM Cortex-M4-based motor drive controller operating in high-temperature enclosures near power electronics. IC Role / Device Role / Timing Role: Monitors 5V auxiliary supply; asserts open-drain RESET to halt PWM generation and gate driver ICs during undervoltage events. Use Value: Prevents erratic gate switching and shoot-through faults by ensuring clean, synchronized reset across MCU and analog front-end. | Use Scenario: Power-on reset for LIN gateway microcontroller in door module, exposed to under-hood thermal cycling. IC Role / Device Role / Timing Role: Provides 190 ms reset pulse after 5V supply stabilizes; interfaces via 3.3V pull-up to match MCU I/O voltage. Use Value: Eliminates need for external RC network and discrete transistor, reducing BOM count and layout area while meeting AEC-Q100 thermal stress requirements. |
| Portable Medical Monitor | Smart Energy Meter |
Use Scenario: Supervision of 5V DC-DC output powering ECG signal processor and Bluetooth LE radio in battery-operated device. IC Role / Device Role / Timing Role: Detects brown-out during battery sag; uses MR pin for user-initiated recalibration reset via tactile switch. Use Value: 6 µA quiescent current extends battery life; open-drain output allows shared reset line with low-power sensor hub. | Use Scenario: Reset coordination between metering SoC and isolated RS-485 transceiver during AC mains dropout events. IC Role / Device Role / Timing Role: Monitors 5V isolated supply; RESET output pulled up to 3.3V domain to drive both SoC and transceiver enable pins. Use Value: Wired-OR capability enables single reset signal to synchronize recovery of multiple isolated domains without additional logic gates. |
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, push-pull active-low RESET, 140 ms timeout, −40°C to +85°C | Lacks open-drain flexibility; incompatible with multi-supervisor buses or level-shifted logic | Select when board space permits larger SOT-23-4 and system uses only single-reset topology with 5V logic. |
| TPS3808G33DBVR | 3.3V threshold, adjustable delay, 1.8–6V VCC range, −40°C to +125°C, open-drain | Requires external resistor for delay tuning; not drop-in for 4.63V 5V monitoring | Choose when design needs programmable timeout or tighter 1% threshold accuracy, but redesign VCC sensing network. |
Compared with MAX811TEUS+T, LM3724EM5X-4.63 offers extended temperature support and open-drain versatility; versus TPS3808G33DBVR, it delivers exact 4.63V factory calibration without external components-reducing validation effort for legacy 5V systems.
Availability
LM3724EM5X-4.63 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, portable medical devices, and smart energy metering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM3724EM5X-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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in power management and system supervision ICs.
The LM372x family was designed specifically for high-reliability microprocessor reset supervision in harsh environments-emphasizing precision threshold accuracy, wide temperature operation, and robust transient immunity for industrial and automotive applications.
FAQ
What is the reset threshold voltage of the LM3724EM5X-4.63?
The LM3724EM5X-4.63 has a factory-programmed reset threshold of 4.63V, with a guaranteed tolerance of ±0.09V over the full −40°C to +125°C operating range. This value is optimized for monitoring nominal 5V power supplies and ensures reset assertion occurs only when VCC drops below 90.8–94.4% of nominal, preventing spurious resets during normal ripple or transient conditions. The LM3724EM5X-4.63 achieves this using a trimmed bandgap reference and precision comparator architecture.
Does the LM3724EM5X-4.63 support open-drain output configuration?
Yes, the LM3724EM5X-4.63 features an active-low open-drain RESET output (Pin 3), which requires an external pull-up resistor to the target logic voltage rail-enabling interoperability with mixed-voltage systems (e.g., 1.8V, 3.3V, or 5V). This architecture allows multiple LM3724EM5X-4.63 devices or other open-drain supervisors to share a common reset bus without contention. The LM3724EM5X-4.63 datasheet specifies a typical VOL of 0.3V at 1.2 mA sink current, confirming strong low-state drive capability.
What is the operating temperature range of the LM3724EM5X-4.63?
The LM3724EM5X-4.63 is rated for operation from −40°C to +125°C, qualifying it for extended-temperature industrial and automotive applications-including engine control units, motor drives, and under-hood modules. This range is explicitly defined in the TI SNVS154E datasheet for the "EM5X" suffix variant and validated across electrical parameters including reset threshold, timeout, and supply current. The LM3724EM5X-4.63 uses the same SOT-23-5 (DBV) package as its industrial-grade counterparts but with enhanced thermal characterization.
How does the manual reset (MR) pin function on the LM3724EM5X-4.63?
The MR pin (Pin 2) of the LM3724EM5X-4.63 is an active-low, internally pulled up (22 kΩ) manual reset input. When pulled below 0.25×VCC for longer than 10 µs, it initiates a full reset cycle with 190 ms timeout-identical to power-on reset behavior. The LM3724EM5X-4.63 includes built-in debouncing and glitch immunity (100 ns rejection), making it suitable for direct connection to mechanical switches without external RC filtering. The MR pin remains functional even when VCC is as low as 1V.
What package type and marking does the LM3724EM5X-4.63 use?
The LM3724EM5X-4.63 is supplied in a 5-pin SOT-23-5 (DBV) package measuring 2.9 mm × 1.6 mm × 1.1 mm, with RoHS-compliant green finish and moisture sensitivity level 1. Its top-side marking is "R62B", as confirmed in TI's official packaging addendum. The "EM5X" suffix denotes extended-temperature grade in tape-and-reel format (3000 pcs per reel), distinguishing it from "EM5" (1000 pcs) and "IM5" (industrial grade) variants. The LM3724EM5X-4.63 shares pinout and footprint compatibility with all LM372x family members in DBV packaging.
LM3724EM5X-4.63 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:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM3724EM5X-4.63 FAQ
1.How can I place an order for LM3724EM5X-4.63 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3724EM5X-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 LM3724EM5X-4.63 reliable?
The price and inventory of LM3724EM5X-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 LM3724EM5X-4.63 is usually 5 days.
3.What payment methods are accepted for LM3724EM5X-4.63?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3724EM5X-4.63 transactions.
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4.How is shipping managed for LM3724EM5X-4.63?
LM3724EM5X-4.63 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3724EM5X-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 LM3724EM5X-4.63?
For technical support, including LM3724EM5X-4.63 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3724EM5X-4.63 requirements.
6.How does Aetrix verify that LM3724EM5X-4.63 is sourced from the original manufacturer or authorized distributors?
All LM3724EM5X-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 LM3724EM5X-4.63 meets industry standards.
7.What is the process for return or replacement of LM3724EM5X-4.63?
All LM3724EM5X-4.63 units undergo pre-shipment inspection (PSI). If there is an issue with LM3724EM5X-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 LM3724EM5X-4.63 part is unused and in its original packaging.
Return procedure for LM3724EM5X-4.63:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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