My Inquiry
My Account
Texas Instruments LM3724EM5X-3.08/NOPB
- Part No.:
- LM3724EM5X-3.08/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM3724EM5X-3.08/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,109
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM3724EM5X-3.08/NOPB from Texas Instruments is an active-low, open-drain microprocessor reset supervisor IC designed for 3.3V supply monitoring. It asserts reset when VCC falls below 3.08V ±1.5%, guarantees valid output down to VCC ≥1V, delivers 190ms typical reset timeout, and operates across −40°C to +85°C. It serves in embedded controllers requiring reliable power-on initialization and brownout protection.
For engineers reviewing the LM3724EM5X-3.08/NOPB datasheet, LM3724EM5X-3.08/NOPB pinout, LM3724EM5X-3.08/NOPB application, or LM3724EM5X-3.08/NOPB equivalent, key selection criteria include its 3.08V threshold accuracy, open-drain output compatibility with mixed-voltage systems, −40°C to +85°C industrial temperature range, 6µA typical supply current, and SOT-23-5 package footprint.
Technical Context
The LM3724EM5X-3.08/NOPB integrates a precision voltage comparator with 30ppm/°C tempco, a manual reset input with internal 22kΩ pull-up and 100ns glitch immunity, and a one-shot timer that ensures ≥100ms minimum reset assertion after VCC recovery. Its open-drain RESET output supports wired-OR configurations and level-shifting via external pull-up to up to 5.5V.
It uses a 1.225V internal reference and low-line comparator architecture to detect brownout conditions. Reset remains asserted during VCC transients as short as 40µs at 125mV underdrive, and the MR input triggers reset within 2µs propagation delay after a >10µs low pulse.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±1.5% - precisely monitors 3.3V nominal supplies within 91.8–95.2% tolerance band |
| Reset Timeout | 190ms typical - ensures sufficient microprocessor initialization time after power stabilization |
| Supply Current | 7µA typical at 3.6V - enables ultra-low-power operation in battery-backed systems |
| Operating Temp | −40°C to +85°C - qualified for industrial ambient environments without derating |
| VCC Range | 1.0V to 5.5V - RESET output remains functional even during deep brownout (≥1V) |
| Output Type | Active-low open-drain - allows multi-supervisor wired-OR and logic-level translation |
| MR Input | Internal 22kΩ pull-up, VIH = 0.7×VCC, VIL = 0.25×VCC - simplifies pushbutton interface without external components |
Pinout & Package
SOT-23-5 (DBV) package: 2.9mm × 1.6mm × 1.45mm body, gull-wing leads, pin 1 marked by index area, JEDEC MO-178 compliant, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Primary return path for internal comparators and logic; must connect to system ground plane |
| 2 GND | Device substrate connection | Second ground terminal for thermal and noise performance; ties die substrate to PCB ground |
| 3 RESET | Active-low open-drain output | Drives low during reset; requires external pull-up resistor to define logic-high level and sink current |
| 4 MR | Manual reset input | Debounced input; pulling low for >10µs initiates 190ms reset pulse; internally pulled up to VCC |
| 5 VCC | Supply voltage input | Accepts 1.0–5.5V; powers all internal circuitry including reference and comparators |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.08V threshold | ±1.5% tolerance over full temperature range ensures robust 3.3V supply monitoring without false resets |
| Open-drain RESET output | Enables direct connection to µP reset pins with different I/O voltages and supports multiple supervisors on shared reset bus |
| Guaranteed operation down to VCC = 1V | Ensures deterministic reset behavior during deep brownout-no undefined logic states at low VCC |
| Low 6µA supply current | Minimizes quiescent drain in always-on supervisory paths, critical for long-life portable/battery applications |
| 22kΩ internal MR pull-up | Eliminates need for external pull-up resistor when using momentary switch for manual reset |
Applications
| Industrial PLC Controller | Medical Diagnostic Handheld |
|---|---|
Use Scenario: Power sequencing and fault recovery in programmable logic controller modules operating in factory-floor environments with wide ambient temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Supervises 3.3V FPGA and MCU core supply; asserts open-drain RESET to halt execution during brownout and provides 190ms hold time for safe state capture. Use Value: Prevents corrupted configuration writes during unstable power; open-drain output interfaces cleanly with 5V-tolerant reset inputs on legacy peripherals. | Use Scenario: Battery-powered ultrasound probe with real-time signal processing, requiring guaranteed boot integrity after cold start or low-battery wake-up. IC Role / Device Role / Timing Role: Monitors 3.3V analog front-end and DSP supply; activates reset on VCC drop below 3.08V and holds for 190ms to allow ADC calibration and memory self-test. Use Value: 7µA typical ICC extends battery life; guaranteed RESET validity down to VCC = 1V prevents spurious resets during rapid battery discharge. |
| Smart Energy Meter | Automotive Body Control Module |
Use Scenario: Revenue-grade electricity meter with tamper detection, operating continuously on mains or backup capacitor power with frequent voltage sags. IC Role / Device Role / Timing Role: Detects 3.3V rail collapse during line dips; generates clean reset pulse to ARM Cortex-M0+ MCU and secure crypto co-processor. Use Value: 30ppm/°C tempco maintains threshold stability across −25°C to +70°C enclosure temperatures; MR pin enables field-service reset via test point. | Use Scenario: Low-power BCM managing door locks, lighting, and sensors in 12V automotive systems with LDO-regulated 3.3V domain. IC Role / Device Role / Timing Role: Supervises post-LDO 3.3V supply; open-drain RESET connects to shared vehicle reset bus with other ECUs via 10kΩ pull-up to 5V. Use Value: Immunity to 40µs/125mV VCC transients avoids false resets from load-dump noise; −40°C to +85°C rating matches AEC-Q200 ambient requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Fixed 3.3V threshold (±0.5%), push-pull active-low output, 350ms default timeout, 1.4µA IQ | Higher accuracy and lower current, but lacks open-drain flexibility and MR debouncing | Select when higher threshold precision and ultra-low IQ outweigh need for wired-OR capability |
| MAX811TEUS+T | 3.08V threshold (±2.5%), push-pull active-low output, 140ms min timeout, 10µA IQ, same SOT-23-5 | Compatible pinout and threshold, but no MR internal pull-up and higher supply current | Select when board layout reuse is critical and external MR pull-up is acceptable |
Compared with TPS3808G33DBVR and MAX811TEUS+T, the LM3724EM5X-3.08/NOPB uniquely combines open-drain output, integrated MR pull-up, and industrial temperature grade in a cost-optimized SOT-23-5, making it ideal for designs requiring bus-shared reset signaling and simplified manual reset implementation.
Availability
LM3724EM5X-3.08/NOPB is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, smart meters, and automotive body electronics requiring stable component supply with guaranteed long-term continuity.
Supply support for LM3724EM5X-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 company delivering analog and embedded processing solutions, with leadership in power management, signal chain, and microcontrollers.
The LM3724EM5X-3.08/NOPB belongs to TI's microprocessor supervisory IC product line, engineered specifically for reliable power-on reset, brownout detection, and manual reset functionality in space-constrained industrial and portable systems.
FAQ
What is the exact reset threshold voltage of the LM3724EM5X-3.08/NOPB?
The LM3724EM5X-3.08/NOPB has a factory-programmed reset threshold of 3.08V with ±1.5% tolerance over the full −40°C to +85°C operating temperature range. This value is specified in the Electrical Characteristics table of the SNVS154E datasheet and applies directly to the LM3724EM5X-3.08/NOPB variant, ensuring precise monitoring of 3.3V nominal supplies.
Does the LM3724EM5X-3.08/NOPB require an external pull-up resistor on the RESET pin?
Yes, the LM3724EM5X-3.08/NOPB features an active-low open-drain RESET output and requires an external pull-up resistor to establish the high logic level. The datasheet recommends a 100kΩ resistor for general use, sized to limit sink current to <10mA while accommodating leakage from connected devices. No pull-up is integrated internally for the RESET pin.
What is the function of Pin 2 (GND) on the LM3724EM5X-3.08/NOPB?
Pin 2 on the LM3724EM5X-3.08/NOPB is the device substrate connection, providing a dedicated ground path for the silicon die substrate. It must be connected to the system ground plane alongside Pin 1 (GND) to ensure optimal thermal dissipation, noise immunity, and stable reference potential for the internal comparators and voltage reference.
Can the LM3724EM5X-3.08/NOPB operate with a supply voltage below 3.08V?
Yes, the LM3724EM5X-3.08/NOPB remains functional with VCC as low as 1.0V. Its RESET output is guaranteed valid down to VCC ≥1V, and internal circuitry-including the 1.225V reference and comparators-continues to operate correctly. Below 1.0V, RESET may become indeterminate, so a 100kΩ pull-down is recommended per datasheet Figure 13 if operation near 0V is required.
How does the manual reset (MR) input behave on the LM3724EM5X-3.08/NOPB?
The MR input on the LM3724EM5X-3.08/NOPB is internally pulled up to VCC via a 22kΩ resistor. Pulling MR below 0.25×VCC for more than 10µs initiates a reset pulse; the output remains asserted for the full 190ms timeout period after MR returns high. Glitches shorter than 100ns are rejected, and propagation delay from MR low-to-reset assert is typically 2µs.
LM3724EM5X-3.08/NOPB 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:
- 3.08V
- 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-3.08/NOPB FAQ
1.How can I place an order for LM3724EM5X-3.08/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3724EM5X-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 LM3724EM5X-3.08/NOPB reliable?
The price and inventory of LM3724EM5X-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 LM3724EM5X-3.08/NOPB is usually 5 days.
3.What payment methods are accepted for LM3724EM5X-3.08/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3724EM5X-3.08/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3724EM5X-3.08/NOPB?
LM3724EM5X-3.08/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3724EM5X-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 LM3724EM5X-3.08/NOPB?
For technical support, including LM3724EM5X-3.08/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3724EM5X-3.08/NOPB requirements.
6.How does Aetrix verify that LM3724EM5X-3.08/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3724EM5X-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 LM3724EM5X-3.08/NOPB meets industry standards.
7.What is the process for return or replacement of LM3724EM5X-3.08/NOPB?
All LM3724EM5X-3.08/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3724EM5X-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 LM3724EM5X-3.08/NOPB part is unused and in its original packaging.
Return procedure for LM3724EM5X-3.08/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3724EM5X-3.08/NOPB Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
