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Texas Instruments LM8365BALMFX27/NOPB
- Part No.:
- LM8365BALMFX27/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM8365BALMFX27/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:8,887
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Product details
Overview
LM8365BALMFX27/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, and programmable delay via external capacitor (130 ms typical with 0.1 μF). It operates from 1 V to 6 V input and draws only 0.62 μA quiescent current at 2.6 V - ideal for low-battery detection in portable microprocessor systems.
For engineers reviewing the LM8365BALMFX27/NOPB datasheet, LM8365BALMFX27/NOPB pinout, LM8365BALMFX27/NOPB application, or LM8365BALMFX27/NOPB equivalent, this page delivers verified technical context, SOT-23-5 package mapping, functional timing behavior, real-world use cases, and validated alternative options for reset supervision in battery-powered embedded designs.
Technical Context
The LM8365BALMFX27/NOPB integrates a precision voltage reference, comparator with built-in hysteresis (0.135 V typical), and internal delay generator controlled by the CD pin. Its detector threshold is trimmed to 2.7 V (VDET− = 2.7 V ±2.5%), with VDET+ = VDET− + VHYS ensuring stable reset release.
It uses an internal 1 MΩ pull-up resistor (RD) between VIN and CD pin to charge the external capacitor; reset reassertion occurs when CD voltage reaches ~0.675 × VIN. The open-drain RESET output requires an external pull-up and sinks up to 2.5 mA at 1.5 V input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 2.7 V ±2.5% - precisely trimmed for reliable low-battery flagging at nominal Li-ion discharge level |
| Quiescent Current | 0.62 μA at VIN = 2.6 V - enables multi-year operation on coin-cell batteries |
| Input Voltage Range | 1 V to 6 V - supports single-cell alkaline, Li-ion, and regulated 3.3/5 V rails |
| Output Type | Active-low open-drain - allows wired-OR reset bus and flexible voltage-level translation |
| Programmable Delay | 130 ms typical with 0.1 μF capacitor - provides configurable power-up stabilization time |
| Hysteresis | 0.135 V typical - prevents oscillation during slow-rising/falling supply transitions |
| Operating Temp | −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, 1.45 mm max height, RoHS-compliant tin (Sn) lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Open-drain output | Active-low reset signal; requires external pull-up; sinks ≥1 mA at 1.5 V |
| 2 - INPUT | Voltage sense input | Monitors VIN; threshold detection occurs at 2.7 V falling edge |
| 3 - GND | Ground reference | Return path for internal reference and comparator; must be low-impedance |
| 4 - N/C | No connection | Internally unconnected; no PCB trace or component required |
| 5 - CD | Capacitor delay control | Charges via internal 1 MΩ resistor; delay timing set by external capacitor value |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 0.62 μA enables >10-year shelf life on CR2032 in always-on monitoring |
| High-accuracy threshold | ±2.5% tolerance ensures consistent reset assertion across production lots |
| Programmable delay | External capacitor sets delay from ~10 ms to >1 s - no firmware or external timer needed |
| Built-in hysteresis | 0.135 V prevents chatter during brown-out recovery without external components |
| Wide input range | 1 V–6 V operation supports direct connection to unregulated battery inputs |
Applications
| Portable Power Management | Microprocessor Supervision |
|---|---|
Use Scenario: Monitoring single-cell Li-ion (2.8–4.2 V) in Bluetooth earbuds to trigger shutdown before deep discharge. IC Role / Device Role / Timing Role: Undervoltage detector asserting active-low RESET to halt MCU execution and preserve battery health. Use Value: 0.62 μA current draw extends usable battery life by >15% versus higher-quiescent alternatives. |
Use Scenario: Ensuring clean boot sequence for ARM Cortex-M0+ in smart sensor node powered by AA batteries. IC Role / Device Role / Timing Role: Reset controller holding processor in reset until supply stabilizes above 2.7 V and delay expires. Use Value: 130 ms programmable delay eliminates need for RC-based reset timers and reduces BOM count. |
| Low-Power IoT Node | Battery Backup Detection |
Use Scenario: Detecting main supply failure in LoRaWAN gateway to switch to backup supercapacitor. IC Role / Device Role / Timing Role: Voltage supervisor triggering switchover logic via open-drain RESET signal. Use Value: Open-drain output allows level-shifting to 3.3 V control logic while operating from 1.8 V backup rail. |
Use Scenario: Validating backup coin-cell voltage (>2.7 V) before enabling RTC write operations in medical wearable. IC Role / Device Role / Timing Role: Precision threshold detector enabling safe non-volatile memory writes only when backup power is sufficient. Use Value: ±2.5% accuracy guarantees reliable RTC retention down to 2.63 V - critical for FDA-compliant data logging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar undervoltage-sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB27DBVR | 2.7 V threshold, 0.5 μA IQ, SOT-23-5, but fixed 200 ms delay (no CD pin) | Lacks programmable delay - suitable only where fixed timing suffices | Choose TLV803EB27DBVR if delay flexibility is unnecessary and lowest possible IQ is prioritized |
| MAX809SEUR+T | 2.7 V threshold, 12 μA IQ, SOT-23-3, fixed 240 ms delay, no hysteresis adjustment | Higher current draw and no CD pin - limits battery lifetime in ultra-low-power designs | Choose MAX809SEUR+T only for cost-sensitive, non-battery applications where 12 μA is acceptable |
Compared with TLV803EB27DBVR and MAX809SEUR+T, the LM8365BALMFX27/NOPB uniquely combines sub-μA quiescent current, programmable delay, and factory-trimmed hysteresis - making it the only option that maintains precision timing control without sacrificing battery longevity.
Availability
LM8365BALMFX27/NOPB is available at Aetrix Electronics and suitable for portable electronics, microprocessor reset supervision, and battery backup detection requiring stable component supply across industrial temperature ranges and long-lifecycle programs.
Supply support for LM8365BALMFX27/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 specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and high-reliability ICs.
The LM8365 series was designed specifically for ultra-low-power voltage monitoring in battery-operated microprocessor systems - delivering precision reset control without compromising energy efficiency.
FAQ
What is the exact detection threshold voltage of LM8365BALMFX27/NOPB?
The LM8365BALMFX27/NOPB has a factory-trimmed undervoltage detection threshold of 2.7 V with ±2.5% accuracy over temperature. This means the actual trip point falls between 2.633 V and 2.767 V at 25°C, and remains stable across −40°C to +85°C due to low temperature coefficient (±100 ppm/°C).
How does the programmable delay work on LM8365BALMFX27/NOPB?
The LM8365BALMFX27/NOPB uses its CD pin to control delay timing: an internal 1 MΩ resistor charges an external capacitor connected to CD, and RESET deasserts only after the capacitor voltage reaches ~0.675 × VIN. With a 0.1 μF capacitor, typical delay is 130 ms; scaling to 1 μF yields ~1.2 s - enabling precise, component-based timing without software or additional ICs.
Does LM8365BALMFX27/NOPB require an external pull-up resistor on the RESET pin?
Yes, LM8365BALMFX27/NOPB features an open-drain RESET output and requires an external pull-up resistor to the desired logic rail (e.g., 3.3 V or VIN). A 470 kΩ resistor is commonly used per TI's EVM design, allowing the output to sink ≥1 mA while maintaining low standby current - critical for preserving battery life in always-on applications.
Can LM8365BALMFX27/NOPB operate below 1.5 V input?
Yes, LM8365BALMFX27/NOPB is fully specified down to 1 V input and functions reliably at 1.2 V, though RESET sink current drops to ~1 mA at 1.5 V (per Electrical Characteristics table). Its ability to monitor down to 1 V makes it suitable for end-of-life battery detection in single-cell alkaline or NiMH systems where voltage collapses below 1.5 V.
Is LM8365BALMFX27/NOPB pin-compatible with MC33465?
Yes, LM8365BALMFX27/NOPB is explicitly documented as pin-for-pin compatible with ON Semiconductor's MC33465 in the official datasheet (Feature list, Section 1). Both use SOT-23-5 packaging with identical pin assignments (RESET, INPUT, GND, N/C, CD), enabling drop-in replacement where 2.7 V threshold and programmable delay are required.
LM8365BALMFX27/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
LM8365BALMFX27/NOPB FAQ
1.How can I place an order for LM8365BALMFX27/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM8365BALMFX27/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 LM8365BALMFX27/NOPB reliable?
The price and inventory of LM8365BALMFX27/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM8365BALMFX27/NOPB is usually 5 days.
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Once your LM8365BALMFX27/NOPB order is processed, you will receive an email with the shipment details and tracking number.
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5.How can I obtain technical support or documentation for LM8365BALMFX27/NOPB?
For technical support, including LM8365BALMFX27/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM8365BALMFX27/NOPB requirements.
6.How does Aetrix verify that LM8365BALMFX27/NOPB is sourced from the original manufacturer or authorized distributors?
All LM8365BALMFX27/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 LM8365BALMFX27/NOPB meets industry standards.
7.What is the process for return or replacement of LM8365BALMFX27/NOPB?
All LM8365BALMFX27/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM8365BALMFX27/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 LM8365BALMFX27/NOPB part is unused and in its original packaging.
Return procedure for LM8365BALMFX27/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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