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Texas Instruments LM8365BALMF27/NOPB
- Part No.:
- LM8365BALMF27/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM8365BALMF27/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,391
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Product details
Overview
LM8365BALMF27/NOPB from Texas Instruments is a micropower undervoltage-sensing circuit with 2.7 V detection threshold, ±2.5% accuracy, open-drain active-low RESET output, programmable delay via external capacitor (130 ms typical with 0.1 μF), and 0.62 μA quiescent current at 2.6 V - used for battery-backed microprocessor reset control in portable electronics.
For engineers reviewing the LM8365BALMF27/NOPB datasheet, LM8365BALMF27/NOPB pinout, LM8365BALMF27/NOPB application, or LM8365BALMF27/NOPB equivalent, key selection considerations include its precise 2.7 V threshold, ultra-low supply current, built-in hysteresis (0.135 V typ), CD pin-based delay programming, and SOT-23-5 package compatibility with MC33465.
Technical Context
The LM8365BALMF27/NOPB integrates a precision voltage reference, comparator with trimmed 2.7 V threshold (VDET−), and internal hysteresis (0.135 V typ) to prevent oscillation near threshold. Its CD pin connects to an external capacitor and internal 1 MΩ pull-up resistor (RD) to generate a user-programmable reset delay.
Upon VIN falling below 2.7 V, the RESET output goes low and CD discharges instantly; when VIN rises above VDET+ (2.7 V + VHYS), CD charges toward VIN until reaching ~0.675×VIN, triggering RESET high after delay. The device operates from 1 V to 6 V and guarantees reset functionality down to 1 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 2.7 V ±2.5% - precisely trimmed for reliable low-battery indication at nominal 2.7 V supply level |
| Quiescent Current | 0.62 μA at VIN = 2.6 V - enables multi-year operation on coin-cell batteries |
| Output Type | Active-low open-drain RESET - requires external pull-up; supports wired-OR and level-shifting |
| Delay Programming | Capacitor-connected CD pin with 1 MΩ internal RD - 130 ms delay with 0.1 μF, scalable to seconds |
| Operating Voltage Range | 1 V to 6 V - functional reset assertion even during deep brownout or single-cell Li-ion discharge |
| Hysteresis | 0.135 V typical - prevents chatter during slow-rising/falling input transitions |
| Temperature Range | −40°C to +85°C - qualified for industrial and portable consumer environments |
Pinout & Package
SOT-23-5 (DBV) package, 2.90 mm × 1.60 mm body size, 1.45 mm max height, JEDEC MO-178 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Open-drain output | Active-low reset signal; must be pulled up externally (e.g., 470 kΩ to VIN); sinks ≥1 mA at 0.5 V |
| 2: INPUT | Voltage sense input | Monitors VIN supply; threshold detection occurs at 2.7 V with hysteresis; valid from 1 V to 6 V |
| 3: GND | Ground reference | Analog and digital ground return; must be low-impedance connection to system ground plane |
| 4: N/C | No connection | Internally unconnected; no PCB trace or pad required; leave floating or omit from layout |
| 5: CD | Delay capacitor terminal | Connects to external timing capacitor; internal 1 MΩ pull-up charges capacitor to generate delay; discharges fully on undervoltage event |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 0.62 μA at 2.6 V enables >10-year shelf life on CR2032 battery in always-on monitoring |
| Precision 2.7 V threshold | ±2.5% tolerance ensures consistent reset point across temperature and unit-to-unit variation |
| Programmable reset delay | External capacitor on CD pin sets delay from milliseconds to seconds without firmware or additional ICs |
| Built-in hysteresis | 0.135 V typical prevents false resets during noisy or slowly varying supply conditions |
| Wide input voltage range | Operates from 1 V to 6 V - supports single-cell alkaline, Li-ion, and multi-cell configurations |
Applications
| Portable Power Management | Microprocessor Reset Control |
|---|---|
|
Use Scenario: Monitoring voltage of a CR2032-powered IoT sensor node to trigger graceful shutdown before battery depletion. IC Role / Device Role / Timing Role: Undervoltage detector asserting active-low RESET to halt MCU execution and disable peripherals. Use Value: 0.62 μA quiescent current extends operational lifetime by months; 2.7 V threshold aligns with end-of-life voltage for lithium coin cells. |
Use Scenario: Ensuring clean boot sequence for an ARM Cortex-M0 microcontroller powered from a switching regulator. IC Role / Device Role / Timing Role: Supervisor generating delayed reset pulse after power rail stabilization, using 0.1 μF CD capacitor for 130 ms hold-off. Use Value: Programmable delay eliminates need for RC network or firmware wait loops; open-drain output allows shared reset bus with other devices. |
| Battery Backup Detection | Power-Fail Indicator |
|
Use Scenario: Detecting main supply failure in a smart meter to switch to backup supercapacitor and save critical data. IC Role / Device Role / Timing Role: Dual-threshold monitoring (via companion device) where LM8365BALMF27/NOPB triggers backup enable at 2.7 V. Use Value: Guaranteed operation down to 1 V ensures detection even during rapid brownout; hysteresis avoids repeated toggling during marginal supply. |
Use Scenario: Signaling AC power loss in a PoE-powered access point to initiate controlled firmware save and LED status change. IC Role / Device Role / Timing Role: Input voltage monitor feeding RESET signal to FPGA logic that initiates power-fail interrupt service routine. Use Value: 2.7 V threshold matches common 3.3 V rail dropout margin; SOT-23-5 footprint minimizes board area in space-constrained designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar undervoltage-sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809EC27DBVR | Fixed 2.7 V threshold, push-pull output, 2.5 μA IQ, SOT-23-3 | No programmable delay; lacks CD pin; simpler interface but no timing flexibility | Choose TLV809EC27DBVR for cost-sensitive, delay-not-required designs where push-pull output simplifies routing |
| MAX809SEUR+T | 2.7 V threshold, open-drain output, 12 μA IQ, SOT-23-3, no delay programming | Higher quiescent current; no CD pin or delay capability; wider threshold tolerance (±3.5%) | Choose MAX809SEUR+T only if legacy qualification or second-source requirement overrides ultra-low IQ and delay needs |
Compared with TLV809EC27DBVR and MAX809SEUR+T, the LM8365BALMF27/NOPB uniquely delivers sub-μA quiescent current plus user-defined reset delay - making it optimal for long-life battery systems requiring both precision and timing control.
Availability
LM8365BALMF27/NOPB is available at Aetrix Electronics and suitable for portable electronics, microprocessor reset control, and battery backup detection requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LM8365BALMF27/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 LM8365BALMF27/NOPB belongs to TI's supervisor and reset IC product line, designed specifically for ultra-low-power voltage monitoring in battery-operated and energy-constrained systems.
FAQ
What is the exact detection threshold voltage of the LM8365BALMF27/NOPB?
The LM8365BALMF27/NOPB has a nominal detection threshold of 2.7 V with ±2.5% accuracy over temperature and process variation. This value is trimmed during manufacturing and specified as VDET− = 2.633 V (min) to 2.767 V (max) at TA = 25°C per the Electrical Characteristics table in the SNVS233C datasheet. The LM8365BALMF27/NOPB uses this precise threshold to assert RESET when input voltage falls below this level.
How does the CD pin on the LM8365BALMF27/NOPB generate programmable delay?
The CD pin on the LM8365BALMF27/NOPB connects to an external capacitor and an internal 1 MΩ pull-up resistor (RD). When VIN drops below threshold, CD discharges instantly; when VIN rises above VDET+, CD charges toward VIN until reaching ~0.675×VIN, at which point RESET returns high. With a 0.1 μF capacitor, the LM8365BALMF27/NOPB achieves ~130 ms delay; scaling the capacitor linearly adjusts delay time.
Is the LM8365BALMF27/NOPB pin-compatible with the MC33465?
Yes, the LM8365BALMF27/NOPB is explicitly stated in its datasheet as pin-for-pin compatible with the MC33465. Both devices use the same SOT-23-5 (DBV) package and identical pinout: RESET (pin 1), INPUT (pin 2), GND (pin 3), N/C (pin 4), and CD (pin 5). This allows direct replacement in existing MC33465 designs without PCB changes.
What is the minimum operating voltage for the LM8365BALMF27/NOPB to assert RESET?
The LM8365BALMF27/NOPB guarantees RESET assertion functionality down to 1 V input voltage, as confirmed in the device description and Recommended Operating Conditions. It maintains accurate 2.7 V threshold detection and hysteresis behavior across the full 1 V to 6 V operating range, enabling use in deeply discharged battery scenarios where other supervisors fail.
Does the LM8365BALMF27/NOPB require an external pull-up resistor on the RESET pin?
Yes, the LM8365BALMF27/NOPB features an open-drain RESET output and requires an external pull-up resistor to function correctly. The datasheet recommends a 470 kΩ resistor to VIN for typical applications. Without this pull-up, the RESET signal cannot transition high, and the device will not release reset after the delay period - a mandatory design requirement for the LM8365BALMF27/NOPB.
LM8365BALMF27/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.7V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM8365BALMF27/NOPB FAQ
1.How can I place an order for LM8365BALMF27/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM8365BALMF27/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 LM8365BALMF27/NOPB reliable?
The price and inventory of LM8365BALMF27/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM8365BALMF27/NOPB is usually 5 days.
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Once your LM8365BALMF27/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 LM8365BALMF27/NOPB?
For technical support, including LM8365BALMF27/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM8365BALMF27/NOPB requirements.
6.How does Aetrix verify that LM8365BALMF27/NOPB is sourced from the original manufacturer or authorized distributors?
All LM8365BALMF27/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 LM8365BALMF27/NOPB meets industry standards.
7.What is the process for return or replacement of LM8365BALMF27/NOPB?
All LM8365BALMF27/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM8365BALMF27/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 LM8365BALMF27/NOPB part is unused and in its original packaging.
Return procedure for LM8365BALMF27/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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