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Texas Instruments LM8365BCLMF30/NOPB
- Part No.:
- LM8365BCLMF30/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM8365BCLMF30/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,719
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Product details
Overview
LM8365BCLMF30/NOPB from Texas Instruments is a micropower undervoltage-sensing circuit with active-low open-drain reset output, 3.0 V threshold voltage (±2.5%), programmable delay via external capacitor (130 ms typical with 0.1 μF), and 0.62 μA quiescent current at 2.6 V - used for microprocessor reset control in battery-powered portable electronics.
For engineers reviewing the LM8365BCLMF30/NOPB datasheet, LM8365BCLMF30/NOPB pinout, LM8365BCLMF30/NOPB application, or LM8365BCLMF30/NOPB equivalent, key selection considerations include threshold accuracy, ultra-low supply current, delay programmability, open-drain output compatibility with diverse logic families, and SOT-23-5 footprint constraints.
Technical Context
The LM8365BCLMF30/NOPB integrates a precision voltage reference, comparator with built-in hysteresis (0.135 V typical), and internal delay generator controlled by an external capacitor on the CD pin. Its input voltage range spans 1 V to 6 V, enabling operation down to near-dead-battery conditions while maintaining guaranteed reset functionality.
Reset assertion occurs when VIN drops below the 3.0 V threshold (VDET−), triggering immediate discharge of the CD capacitor; release requires VIN to rise above VDET+ (3.0 V + hysteresis) and the CD pin voltage to charge to 0.675 × VIN through a 1 MΩ internal pull-up resistor (RD), establishing precise, capacitor-programmable delay timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 3.0 V ±2.5% - ensures reliable reset activation at defined supply rail margin for 3.3 V systems. |
| Quiescent Current | 0.62 μA at VIN = 2.6 V - extends battery life in always-on monitoring applications. |
| Input Voltage Range | 1 V to 6 V - supports single-cell Li-ion, multi-cell alkaline, and regulated 3.3/5 V rails. |
| Output Type | Active-low open-drain - enables wired-OR reset buses and flexible pull-up to any logic rail (VIN, 3.3 V, 5 V). |
| Delay Programmability | 130 ms typical with 0.1 μF CD capacitor - provides sufficient hold-off time for power supply stabilization. |
| Hysteresis | 0.135 V typical - prevents oscillatory reset toggling during slow-rising/falling supply transitions. |
| Operating Temperature | −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 | Active-low open-drain output | Must be externally pulled up; sinks current during reset assertion; compatible with TTL, CMOS, and microcontroller reset inputs. |
| 2 - INPUT | Supply voltage input | Monitored rail; operates from 1 V to 6 V; powers internal circuitry and defines CD charging reference. |
| 3 - GND | Ground reference | Primary return path for internal comparator, reference, and CD discharge current; must connect to system ground plane. |
| 4 - N/C | No connection | Internally unconnected; no PCB trace or pad required; leave floating per TI design guidance. |
| 5 - CD | Capacitor delay pin | Charges/discharges external timing capacitor; internal 1 MΩ pull-up and N-channel discharge FET enable precise delay tuning. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 0.62 μA enables >10-year battery life in coin-cell–powered devices monitoring supply rails. |
| Precision threshold with hysteresis | 3.0 V ±2.5% threshold + 0.135 V hysteresis eliminates false resets during noisy or slowly varying supply conditions. |
| Capacitor-programmable delay | External 0.1 μF capacitor yields 130 ms delay - allows system-specific timing without firmware or additional ICs. |
| Wide input voltage range | 1 V to 6 V operation supports direct monitoring of single Li-ion (2.7–4.2 V), two alkaline (1.8–3.2 V), or regulated rails. |
| Open-drain output architecture | Enables shared reset bus across multiple ICs and simplifies level-shifting between disparate supply domains. |
Applications
| Portable Power Management | Microprocessor Reset Control |
|---|---|
|
Use Scenario: Monitoring battery voltage in handheld medical devices to prevent data corruption during low-power shutdown. IC Role / Device Role / Timing Role: Undervoltage detector asserting active-low reset to halt MCU execution before brownout-induced instability. Use Value: 0.62 μA quiescent current preserves battery capacity; 3.0 V threshold aligns with safe cutoff for 3.3 V logic; 130 ms delay accommodates battery recovery after transient load dips. |
Use Scenario: Ensuring clean boot sequence in embedded IoT gateways powered by switching regulators with startup overshoot. IC Role / Device Role / Timing Role: Supervisor generating delayed reset pulse only after input rail stabilizes above 3.0 V. Use Value: Built-in hysteresis prevents chatter during regulator soft-start; open-drain output interfaces directly with ARM Cortex-M reset pin requiring external pull-up. |
| Battery Backup Switchover | Power-Fail Indicator |
|
Use Scenario: Detecting main supply failure in smart meter designs to trigger seamless switchover to backup supercapacitor. IC Role / Device Role / Timing Role: Threshold comparator initiating backup power enable signal upon main rail drop below 3.0 V. Use Value: 1 V minimum operating voltage allows detection even as main rail collapses; N/C pin simplifies layout in space-constrained meter PCBs. |
Use Scenario: Providing early warning of AC adapter disconnection in portable test equipment with dual power sources. IC Role / Device Role / Timing Role: Generating timed alert pulse via CD capacitor before full system shutdown. Use Value: Programmable 130 ms delay gives firmware time to save volatile settings; 0.135 V hysteresis avoids nuisance alerts during line noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar undervoltage-sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G30DBVR | Higher quiescent current (800 nA), fixed 3.0 V threshold, no external delay capacitor - uses internal timer. | Less flexible delay tuning; better suited for designs requiring guaranteed 200 ms min delay without capacitor tolerance sensitivity. | Select TPS3808G30DBVR when board space precludes adding 0.1 μF CD capacitor and tighter delay tolerance is required. |
| MAX809SEUR+T | Fixed 3.0 V threshold, 1.6 μA quiescent current, no programmable delay - only basic reset assertion. | Lacks delay capability; simpler interface but cannot replace LM8365BCLMF30/NOPB where timing control is essential. | Choose MAX809SEUR+T only for cost-sensitive applications where delay is unnecessary and higher supply current is acceptable. |
Compared with TPS3808G30DBVR and MAX809SEUR+T, the LM8365BCLMF30/NOPB uniquely balances ultra-low 0.62 μA supply current with user-adjustable delay via external capacitor - making it optimal for long-life battery systems requiring precise, customizable reset timing.
Availability
LM8365BCLMF30/NOPB is available at Aetrix Electronics and suitable for portable electronics, microprocessor reset control, and battery backup detection requiring stable component supply across extended production lifecycles.
Supply support for LM8365BCLMF30/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 LM8365BCLMF30/NOPB belongs to TI's supervisor IC product line, designed specifically for ultra-low-power voltage monitoring in battery-critical portable and industrial systems where extended runtime and reliable reset behavior are mandatory.
FAQ
What is the exact threshold voltage tolerance for LM8365BCLMF30/NOPB?
The LM8365BCLMF30/NOPB has a guaranteed threshold voltage of 3.0 V with ±2.5% tolerance over temperature and process variation, meaning the actual trip point falls between 2.925 V and 3.075 V at 25°C - critical for ensuring consistent reset behavior in 3.3 V systems with tight supply margins.
How does the CD pin function in LM8365BCLMF30/NOPB?
The CD pin in LM8365BCLMF30/NOPB serves as the capacitor delay node: during undervoltage, it discharges rapidly via an internal N-channel MOSFET; upon recovery, it charges through a 1 MΩ internal resistor until reaching 0.675 × VIN, at which point the RESET output releases - enabling precise, capacitor-determined delay timing.
Is LM8365BCLMF30/NOPB pin-compatible with other LM8365 variants?
Yes, LM8365BCLMF30/NOPB shares identical SOT-23-5 (DBV) pinout and footprint with all LM8365 family members including LM8365BALMF27/NOPB and LM8365BALMF45/NOPB - differing only in threshold voltage (2.7 V, 3.0 V, 4.5 V), allowing drop-in replacement when voltage requirements change.
What is the minimum input voltage required for LM8365BCLMF30/NOPB to operate correctly?
The LM8365BCLMF30/NOPB functions down to 1 V input voltage, with guaranteed reset operation and specification compliance across −40°C to +85°C - enabling use in deeply discharged battery scenarios where other supervisors fail to assert reset reliably.
Can LM8365BCLMF30/NOPB drive a standard microcontroller reset pin directly?
Yes, LM8365BCLMF30/NOPB can drive standard microcontroller reset pins directly using its active-low open-drain output: simply connect an external pull-up resistor (e.g., 47 kΩ to VIN or 3.3 V) - the device sinks up to 2.5 mA at 0.5 V, meeting typical MCU reset input leakage and voltage thresholds.
LM8365BCLMF30/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:
- 3V
- Output:
- Complementary
- 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
LM8365BCLMF30/NOPB FAQ
1.How can I place an order for LM8365BCLMF30/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM8365BCLMF30/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 LM8365BCLMF30/NOPB reliable?
The price and inventory of LM8365BCLMF30/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM8365BCLMF30/NOPB is usually 5 days.
3.What payment methods are accepted for LM8365BCLMF30/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM8365BCLMF30/NOPB transactions.
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4.How is shipping managed for LM8365BCLMF30/NOPB?
LM8365BCLMF30/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM8365BCLMF30/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 LM8365BCLMF30/NOPB?
For technical support, including LM8365BCLMF30/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM8365BCLMF30/NOPB requirements.
6.How does Aetrix verify that LM8365BCLMF30/NOPB is sourced from the original manufacturer or authorized distributors?
All LM8365BCLMF30/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 LM8365BCLMF30/NOPB meets industry standards.
7.What is the process for return or replacement of LM8365BCLMF30/NOPB?
All LM8365BCLMF30/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM8365BCLMF30/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 LM8365BCLMF30/NOPB part is unused and in its original packaging.
Return procedure for LM8365BCLMF30/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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