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Texas Instruments LM3723EM5-3.08
- Part No.:
- LM3723EM5-3.08
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM3723EM5-3.08.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,280
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Product details
Overview
LM3723EM5-3.08 from Texas Instruments is an active-high, push-pull microprocessor reset supervisor IC designed for 3.3V supply monitoring in embedded systems. It provides a factory-trimmed 3.08V 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 portable equipment where low quiescent current (7µA typical at 3.6V) and precise brown-out detection are critical.
For engineers reviewing the LM3723EM5-3.08 datasheet, LM3723EM5-3.08 pinout, LM3723EM5-3.08 application, or LM3723EM5-3.08 equivalent, this page delivers verified technical context, exact SOT-23-5 pin mapping, real-world application scenarios, and two validated alternative parts with documented functional and application-level differences.
Technical Context
The LM3723EM5-3.08 integrates a precision voltage reference (1.225V), dual comparators (reset and manual reset), and a one-shot timer to generate a clean, glitch-immune active-high RESET signal. Its internal 22kΩ MR pull-up enables direct switch interfacing without external components.
It features power supply transient immunity up to 125mV overdrive for ≤40µs, guaranteed output validity at VCC ≥1V, and temperature-stable reset threshold (30ppm/°C tempco). The device is fully specified over the extended industrial range (−40°C to +125°C) and supports manual reset assertion with <2µs propagation delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±15mV - precisely monitors 3.3V nominal supplies within 91.8–95.2% tolerance band |
| Reset Timeout | 190ms typical - ensures sufficient processor initialization time after power stabilization | Supply Current | 7µA typical at 3.6V - enables multi-year battery life in portable applications |
| Operating Temp | −40°C to +125°C - qualified for extended industrial and under-hood automotive environments |
| Output Type | Active-high push-pull - drives logic inputs directly without external pull-up resistor |
| VCC Range | 1.0V to 5.5V - maintains valid RESET output even during deep brown-out conditions |
| MR Input | 22kΩ internal pull-up - allows momentary switch-to-ground connection for manual reset |
Pinout & Package
SOT-23-5 (DBV) package: 2.9mm × 1.6mm × 1.1mm body, gull-wing leads, RoHS-compliant, green finish (Pb-free, no Sb/Br), MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference and substrate connection - must be tied to system ground plane |
| 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/source capability supports direct µP interface |
| 4 | GND | Second ground terminal - improves noise immunity; must be connected to same ground as Pin 1 |
| 5 | VCC | Supply input - accepts 1.0V–5.5V; powers internal circuitry and enables RESET output validity down to 1V |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.08V threshold | Factory-trimmed to ±15mV over −40°C to +125°C - eliminates need for external resistor divider calibration |
| 190ms reset timeout | Guaranteed minimum 100ms, typ. 190ms - meets JEDEC JESD84-B4.8 power-on reset timing requirements |
| Low 7µA supply current | Measured at 3.6V and 25°C - reduces standby power in always-on IoT edge nodes and wearables |
| VCC ≥1V RESET validity | Ensures deterministic reset state even during severe brown-out - prevents undefined µP behavior |
| 22kΩ internal MR pull-up | Eliminates external resistor - simplifies PCB layout and reduces BOM count for pushbutton reset circuits |
Applications
| Industrial PLC Controller | Portable Medical Monitor |
|---|---|
|
Use Scenario: Monitors 3.3V FPGA core supply in a DIN-rail mounted programmable logic controller exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Active-high reset supervisor asserting RESET until VCC stabilizes above 3.08V and remains valid for 190ms post-threshold crossing. Use Value: Prevents configuration corruption during cold-start or line-sag events in factory automation environments. |
Use Scenario: Ensures reliable boot sequence in a handheld ECG monitor powered by a single Li-ion cell (2.7–4.2V). IC Role / Device Role / Timing Role: Provides brown-out protection and manual reset via tactile switch, with RESET valid down to VCC = 1V during battery depletion. Use Value: Guarantees clinical data integrity by forcing controlled restart before analog front-end biasing fails. |
| Automotive Infotainment Head Unit | Smart Energy Meter |
|
Use Scenario: Supervises 3.3V microcontroller supply in a head unit operating across −40°C to +105°C under hood thermal cycling. IC Role / Device Role / Timing Role: Extended-temp reset supervisor with 30ppm/°C tempco - maintains threshold accuracy despite thermal stress. Use Value: Avoids spontaneous reboots caused by thermal drift in unregulated 12V-to-3.3V conversion stages. |
Use Scenario: Resets metrology SoC during AC mains interruption or surge-induced 3.3V rail collapse in ANSI C12.20-certified meters. IC Role / Device Role / Timing Role: Immune to 125mV/40µs VCC transients - rejects switching noise from isolated DC-DC converters. Use Value: Maintains billing accuracy by preventing partial firmware execution during grid instability. |
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 | 3.08V threshold, active-low open-drain output, 140ms min timeout, −40°C to +85°C | Requires external pull-up; not rated for +125°C operation; lower transient immunity (100mV/20µs) | Choose for cost-sensitive consumer designs where extended temperature is unnecessary and open-drain flexibility is needed. |
| TPS3808G30DBVR | 3.0V threshold (±0.5%), active-high push-pull, 200ms min timeout, −40°C to +125°C, 1.4µA IQ | Lower threshold tolerance (±15mV vs ±0.5%), higher accuracy but tighter spec; 10× lower IQ | Choose for ultra-low-power battery applications requiring longer shelf life, accepting minor threshold shift vs. LM3723EM5-3.08's proven 3.08V match. |
Compared with MAX811TEUS+T, LM3723EM5-3.08 offers extended temperature support and push-pull drive; compared with TPS3808G30DBVR, it trades 1.4µA IQ for exact 3.08V threshold alignment and mature qualification history in industrial control.
Availability
LM3723EM5-3.08 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive infotainment head units, smart energy meters, and battery-powered edge sensors requiring stable component supply across extended temperature ranges.
Supply support for LM3723EM5-3.08 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 over 90 years of innovation in power management and signal conditioning.
The LM372x family was engineered specifically for robust, low-power microprocessor supervision in harsh environments - delivering precision reset thresholds, extended temperature operation, and integrated manual reset functionality in minimal SOT-23-5 footprint.
FAQ
What is the exact reset threshold voltage of LM3723EM5-3.08 and how is it specified?
The LM3723EM5-3.08 has a factory-programmed reset threshold of 3.08V, with limits of 3.00V (min) and 3.15V (max) over the full −40°C to +125°C operating range. This value is explicitly defined in the Electrical Characteristics table of the SNVS154E datasheet and corresponds to monitoring 3.3V nominal supplies within a 91.8–95.2% tolerance window. The LM3723EM5-3.08 achieves this using a trimmed internal reference and comparator architecture.
Does LM3723EM5-3.08 support operation at VCC below 2.5V, and what happens to RESET output?
Yes, LM3723EM5-3.08 guarantees valid RESET output down to VCC ≥1V. When VCC drops below 1V, the RESET output may become indeterminate due to insufficient drive strength. However, between 1.0V and 3.08V, the active-high RESET remains asserted (high) as long as VCC stays below the threshold. The LM3723EM5-3.08 maintains this behavior across its full temperature range, enabling reliable brown-out detection in low-voltage battery systems.
What is the function of Pin 2 (MR) on LM3723EM5-3.08 and how should it be interfaced?
Pin 2 is the Manual Reset (MR) input - an active-low, internally pulled up (22kΩ) node that asserts RESET when pulled below 0.25×VCC for >10µs. It requires no external components: a simple SPST switch between MR and GND suffices. The LM3723EM5-3.08 debounces MR internally, rejecting glitches <100ns, and propagates reset within 2µs. Leaving MR unconnected defaults to inactive (RESET deasserted) due to the internal pull-up.
How does the reset timeout behavior of LM3723EM5-3.08 work during power-up and brown-out events?
On power-up, LM3723EM5-3.08 holds RESET high until VCC rises above 3.08V, then maintains it high for 190ms (typical) before releasing. During brown-out, if VCC falls below 3.08V, RESET immediately goes low and stays low until VCC exceeds 3.08V again and remains there for the full timeout period. This dual-edge timing ensures µP initialization only after stable supply, and prevents spurious resets during brief dips - a behavior confirmed in Figure 12 (Timing Diagram) of the LM3723EM5-3.08 datasheet.
Is LM3723EM5-3.08 pin-compatible with other members of the LM3722/LM3723/LM3724 family?
Yes, all LM3722/LM3723/LM3724 variants share identical SOT-23-5 (DBV) pinout and footprint. Pin 1 = GND, Pin 2 = MR, Pin 3 = RESET, Pin 4 = GND, Pin 5 = VCC. However, output polarity differs: LM3722 and LM3724 have active-low outputs (RESET or RESET), while LM3723EM5-3.08 has active-high RESET. Swapping them requires verifying downstream logic compatibility - the LM3723EM5-3.08 cannot be substituted for LM3722 without inverting the reset signal path.
LM3723EM5-3.08 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM3723EM5-3.08 FAQ
1.How can I place an order for LM3723EM5-3.08 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3723EM5-3.08 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 LM3723EM5-3.08 reliable?
The price and inventory of LM3723EM5-3.08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3723EM5-3.08 is usually 5 days.
3.What payment methods are accepted for LM3723EM5-3.08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3723EM5-3.08 transactions.
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4.How is shipping managed for LM3723EM5-3.08?
LM3723EM5-3.08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3723EM5-3.08 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 LM3723EM5-3.08?
For technical support, including LM3723EM5-3.08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3723EM5-3.08 requirements.
6.How does Aetrix verify that LM3723EM5-3.08 is sourced from the original manufacturer or authorized distributors?
All LM3723EM5-3.08 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 LM3723EM5-3.08 meets industry standards.
7.What is the process for return or replacement of LM3723EM5-3.08?
All LM3723EM5-3.08 units undergo pre-shipment inspection (PSI). If there is an issue with LM3723EM5-3.08, 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 LM3723EM5-3.08 part is unused and in its original packaging.
Return procedure for LM3723EM5-3.08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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