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Texas Instruments LM8365BCLMFX30/NOPB
- Part No.:
- LM8365BCLMFX30/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM8365BCLMFX30/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,092
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Product details
Overview
LM8365BCLMFX30/NOPB from Texas Instruments is a micropower undervoltage-sensing circuit with active-low open-drain reset output, 2.7 V detection threshold (±2.5%), 0.62 μA quiescent current at 2.6 V, and programmable delay via external capacitor (130 ms typical with 0.1 μF). It operates across 1 V to 6 V input range and is used for microprocessor reset control in battery-powered systems.
For engineers reviewing the LM8365BCLMFX30/NOPB datasheet, LM8365BCLMFX30/NOPB pinout, LM8365BCLMFX30/NOPB application, or LM8365BCLMFX30/NOPB equivalent, key selection considerations include threshold accuracy, ultra-low supply current, open-drain output compatibility with varied pull-up voltages, and capacitor-programmable reset delay timing.
Technical Context
The LM8365BCLMFX30/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 functional architecture uses an internal 1 MΩ pull-up resistor (RD) and 0.675×VIN delay threshold to determine reset release timing after input recovery.
It features dual-stage reset behavior: when VIN drops below VDET− (2.7 V), RESET asserts low immediately while CD discharges; when VIN rises above VDET+ (VDET− + VHYS), CD charges through RD until reaching the delay threshold, then RESET releases high-enabling precise power-on sequencing and brownout recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 2.7 V ±2.5% - ensures reliable reset assertion at defined battery or supply voltage 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 Li-ion, alkaline, NiMH, and regulated 3.3/5 V rails |
| Output Type | Active-low open-drain - allows flexible pull-up to any voltage ≤6.5 V, including higher than VIN |
| Delay Programmability | Capacitor-controlled (CD pin); 130 ms typical with 0.1 μF - provides adjustable reset hold time without firmware |
| Hysteresis | 0.135 V typical - prevents oscillatory reset during slow-rising or noisy supply transitions |
| Operating Temperature | −40°C to +85°C - qualified for industrial and portable consumer environments |
Pinout & Package
SOT-23 (DBV) 5-pin package, 2.90 mm × 1.60 mm body size, 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 VOL = 0.5 V |
| 2 - INPUT | Voltage sense input | Monitors supply rail (VIN); threshold detection occurs at 2.7 V with hysteresis |
| 3 - GND | Ground reference | Return path for internal reference and comparator; must be low-impedance |
| 4 - N/C | No connection | Unbonded die pad; left floating per TI design; no electrical function |
| 5 - CD | Delay capacitor terminal | Charges/discharges external capacitor to set reset release delay; internal 1 MΩ pull-up |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 0.62 μA enables >10-year shelf life on CR2032 cells in standby monitoring |
| Precision threshold with hysteresis | 2.7 V ±2.5% and 0.135 V hysteresis prevent false resets during marginal supply conditions |
| Capacitor-programmable delay | External 0.1 μF sets 130 ms release delay - eliminates need for RC timing on MCU side |
| Wide input voltage range | Operates down to 1 V - supports deep discharge detection in primary battery systems |
| Open-drain output flexibility | Allows pull-up to 3.3 V, 5 V, or VIN - simplifies interface with mixed-voltage logic domains |
Applications
| Battery-Powered Microcontroller Reset | Low-Battery Detection in Wearables |
|---|---|
|
Use Scenario: Monitors main Li-ion cell voltage in a fitness tracker to assert reset before brownout causes MCU lockup. IC Role / Device Role / Timing Role: Undervoltage supervisor providing active-low reset signal with 130 ms hold time after voltage recovery. Use Value: Prevents corrupted firmware execution during battery sag; extends usable runtime by enabling graceful shutdown at 2.7 V. |
Use Scenario: Detects end-of-life voltage in coin-cell–powered medical sensors to trigger low-battery alert before data loss. IC Role / Device Role / Timing Role: Micropower voltage detector with open-drain output driving LED or I/O interrupt line. Use Value: Draws only 0.62 μA - preserves >95% of CR2025 capacity over 2-year deployment. |
| Power-Fail Indicator in Portable Instruments | Backup Power Switchover Control |
|
Use Scenario: Signals AC adapter removal in handheld test equipment, initiating backup to internal battery. IC Role / Device Role / Timing Role: Input voltage monitor asserting RESET low upon AC dropout, enabling controlled switchover sequence. Use Value: Hysteresis prevents chatter during adapter plug/unplug transients; wide 1–6 V range covers both adapter and battery rails. |
Use Scenario: Controls automatic switch from main supply to backup supercapacitor in IoT edge node during mains failure. IC Role / Device Role / Timing Role: Delayed reset release (via CD capacitor) holds system in reset until backup rail stabilizes. Use Value: 130 ms delay ensures supercapacitor reaches ≥2.7 V before MCU resumes operation - avoids under-voltage restart loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar undervoltage sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Fixed 3.3 V threshold; 1.1 μA IQ; push-pull output; no capacitor-programmable delay | Requires external RC or timer IC for delay; better suited for fixed-threshold, low-noise 3.3 V systems | Select when precise 3.3 V reset is needed and ultra-low IQ is secondary to output drive strength |
| MAX809SEUR+T | 2.93 V threshold; 12 μA IQ; fixed 240 ms delay; SOT-23-3 package (no CD pin) | Non-programmable delay; higher current draw limits battery lifetime in long-term monitoring | Choose for drop-in replacement where 2.93 V threshold and fixed delay suffice, and board space is constrained |
Compared with TPS3808G33DBVR and MAX809SEUR+T, the LM8365BCLMFX30/NOPB uniquely combines 2.7 V precision threshold, sub-μA quiescent current, and user-adjustable delay - making it optimal for cost-sensitive, battery-constrained designs requiring tailored reset timing.
Availability
LM8365BCLMFX30/NOPB is available at Aetrix Electronics and suitable for portable electronics, microprocessor reset controllers, and low-battery detection systems requiring stable component supply and long-lifecycle support.
Supply support for LM8365BCLMFX30/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 high-reliability ICs.
The LM8365BCLMFX30/NOPB belongs to TI's micropower supervisor product line, designed specifically for ultra-low-power voltage monitoring in battery-operated and energy-harvesting systems.
FAQ
What is the exact detection threshold voltage of the LM8365BCLMFX30/NOPB?
The LM8365BCLMFX30/NOPB has a nominal detection threshold of 2.7 V with ±2.5% initial accuracy over temperature. This value is trimmed at wafer test and confirmed in the Electrical Characteristics table (VDET− = 2.633 V to 2.767 V at TA = 25°C). The device also includes 0.135 V typical hysteresis to ensure clean reset release.
How does the CD pin on the LM8365BCLMFX30/NOPB control reset delay?
The CD pin on the LM8365BCLMFX30/NOPB connects to an internal 1 MΩ pull-up resistor and serves as the capacitor terminal for programmable delay. When VIN recovers above VDET+, CD charges toward VIN; RESET remains low until CD reaches ~0.675×VIN. With a 0.1 μF capacitor, this yields ~130 ms typical delay - scalable linearly with capacitance.
Is the LM8365BCLMFX30/NOPB pin-compatible with MC33465?
Yes, the LM8365BCLMFX30/NOPB is explicitly stated as pin-for-pin compatible with ON Semiconductor's MC33465 in its official datasheet (Feature section, page 1). Both use SOT-23-5 packaging with identical pin 1 (RESET), pin 2 (INPUT), pin 3 (GND), pin 4 (N/C), and pin 5 (CD) assignments.
What is the maximum sink current capability of the LM8365BCLMFX30/NOPB RESET output?
The LM8365BCLMFX30/NOPB RESET output can sink up to 2.5 mA minimum at VOL = 0.5 V (per Electrical Characteristics, IOL specification). At VIN = 1.5 V, it guarantees ≥1 mA sink; at higher VIN, performance improves. The open-drain structure requires an external pull-up resistor for proper logic-level translation.
Does the LM8365BCLMFX30/NOPB support operation below 1.5 V input?
Yes, the LM8365BCLMFX30/NOPB is fully specified down to 1 V input (Recommended Operating Conditions), and its reset functionality remains active even at 1 V. The datasheet confirms "specified Reset operation down to 1 V with extremely-low standby current," enabling deep-discharge monitoring in primary battery applications.
LM8365BCLMFX30/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
LM8365BCLMFX30/NOPB FAQ
1.How can I place an order for LM8365BCLMFX30/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM8365BCLMFX30/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 LM8365BCLMFX30/NOPB reliable?
The price and inventory of LM8365BCLMFX30/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM8365BCLMFX30/NOPB is usually 5 days.
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Once your LM8365BCLMFX30/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 LM8365BCLMFX30/NOPB?
For technical support, including LM8365BCLMFX30/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM8365BCLMFX30/NOPB requirements.
6.How does Aetrix verify that LM8365BCLMFX30/NOPB is sourced from the original manufacturer or authorized distributors?
All LM8365BCLMFX30/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 LM8365BCLMFX30/NOPB meets industry standards.
7.What is the process for return or replacement of LM8365BCLMFX30/NOPB?
All LM8365BCLMFX30/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM8365BCLMFX30/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 LM8365BCLMFX30/NOPB part is unused and in its original packaging.
Return procedure for LM8365BCLMFX30/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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