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Texas Instruments LM8365BALMFX22
- Part No.:
- LM8365BALMFX22
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM8365BALMFX22.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,727
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Product details
Overview
LM8365BALMFX22 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 on CD pin. It serves as a precision reset controller in battery-powered microprocessor systems requiring stable low-power supervision.
For engineers reviewing the LM8365BALMFX22 datasheet, LM8365BALMFX22 pinout, LM8365BALMFX22 application, or LM8365BALMFX22 equivalent, key selection considerations include its 2.7 V threshold accuracy, 130 ms typical delay with 0.1 μF CD capacitor, SOT-23-5 package compatibility, and operation down to 1 V input voltage.
Technical Context
The LM8365BALMFX22 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 propagation delay timing is defined by charging the CD capacitor through an internal 1 MΩ pull-up resistor (RD) until reaching 0.675 × VIN.
It operates across −40°C to +85°C, supports input voltages from 1 V to 6 V, and delivers RESET output sink current up to 2.5 mA at 1.5 V input while maintaining sub-μA quiescent consumption - enabling reliable reset assertion during brownout conditions without draining battery reserves.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 2.7 V ±2.5% - ensures accurate brownout detection for 3 V systems with margin against false resets |
| Quiescent Current | 0.62 μA at VIN = 2.6 V - enables multi-year battery life in always-on monitoring applications |
| Input Voltage Range | 1 V to 6 V - supports single-cell Li-ion, alkaline, and regulated 3.3/5 V rails without external scaling |
| Output Type | Active-low open-drain - allows flexible pull-up to any logic rail (VIN, 3.3 V, or 5 V) and wired-OR reset bus sharing |
| Delay Programmability | 130 ms typical with 0.1 μF CD capacitor - provides sufficient time for power stabilization before processor release |
| Hysteresis | 0.135 V typical - prevents oscillatory reset toggling near threshold during slow-ramping supply recovery |
| 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 | Drives low during undervoltage; requires external pull-up resistor (e.g., 470 kΩ to VIN) for logic-high state |
| 2 - INPUT | Supply voltage input | Monitored rail; device operates and detects from 1 V to 6 V without external biasing |
| 3 - GND | Ground reference | Primary return path for internal reference, comparator, and CD discharge circuitry |
| 4 - N/C | No connection | Internally unconnected; must remain floating - no routing or soldering required |
| 5 - CD | Capacitor delay control | Charges via internal 1 MΩ resistor; delay time set by external capacitor (e.g., 0.1 μF → 130 ms) |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 0.62 μA at 2.6 V enables >10-year coin-cell operation in low-duty-cycle monitoring |
| Precision threshold with hysteresis | 2.7 V ±2.5% detection with 0.135 V hysteresis eliminates chatter during marginal supply recovery |
| Programmable reset delay | Delay time scaled linearly with CD capacitance (e.g., 1 μF yields ~1.2 s), supporting diverse system startup sequences |
| Wide input voltage range | Operates from 1 V to 6 V - directly monitors single-cell Li-ion (2.5–4.2 V), alkaline (0.9–1.5 V × 2), or regulated rails |
| Open-drain output architecture | Allows shared reset bus across multiple ICs and interface with mixed-voltage logic domains (1.8 V, 3.3 V, 5 V) |
Applications
| Portable Power Management | Microprocessor Reset Control |
|---|---|
Use Scenario: Monitoring battery voltage in handheld medical devices to prevent data corruption during low-battery shutdown. IC Role / Device Role / Timing Role: Undervoltage supervisor asserting active-low RESET when cell voltage drops below 2.7 V, with 130 ms delay to allow graceful firmware save. Use Value: Prevents EEPROM write corruption and ensures deterministic shutdown sequence using only 0.62 μA standby current. |
Use Scenario: Ensuring clean boot of ARM Cortex-M0+ MCU in IoT sensor node powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Reset controller holding processor in reset until regulated 3.3 V rail stabilizes post-power-on, with delay tuned via CD capacitor. Use Value: Eliminates need for discrete RC reset circuit while guaranteeing ±2.5% threshold accuracy across temperature. |
| Battery Backup Detection | Power-Fail Indicator |
Use Scenario: Detecting main supply failure in smart meter to switch to backup supercapacitor and preserve real-time clock. IC Role / Device Role / Timing Role: Supervisory circuit triggering switchover logic when 5 V main rail falls below 2.7 V, with hysteresis preventing bounce during transient dips. Use Value: Enables seamless transition with <100 ms response and zero additional quiescent load on backup source. |
Use Scenario: Signaling AC power loss in industrial PLC I/O module to initiate safe I/O state freeze and logging. IC Role / Device Role / Timing Role: Power-fail detector asserting open-drain signal to FPGA-controlled latch, synchronized to 130 ms CD delay for noise immunity. Use Value: Provides deterministic, low-jitter fail indication independent of microcontroller firmware state or clock domain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar undervoltage-sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809KDBZR | Fixed 3.08 V threshold, no programmable delay, 0.5 μA IQ, SOT-23-3 | Lacks CD pin and delay tuning; suited for simple reset-only use cases without timing control | Select when delay programming is unnecessary and board space is constrained (3-pin vs 5-pin) |
| MAX809SEUR+T | 2.93 V threshold, fixed 240 ms delay, 1.1 μA IQ, SOT-23-3 | Non-programmable delay limits flexibility; higher IQ reduces battery lifetime in ultra-low-power designs | Choose only if fixed 240 ms delay matches system requirements and 2.93 V threshold is acceptable |
Compared with TLV809KDBZR and MAX809SEUR+T, the LM8365BALMFX22 offers unique programmable delay and lower quiescent current, making it optimal for battery-critical applications where timing must be precisely matched to system power-up behavior.
Availability
LM8365BALMFX22 is available at Aetrix Electronics and suitable for portable electronics, microprocessor reset control, and battery backup detection requiring stable component supply and long-term manufacturability.
Supply support for LM8365BALMFX22 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 LM8365BALMFX22 belongs to TI's micropower supervisor product line, designed specifically for ultra-low-power battery-operated systems needing precise, low-current voltage monitoring and programmable reset timing.
FAQ
What is the detection threshold voltage of the LM8365BALMFX22?
The LM8365BALMFX22 has a nominal detection threshold of 2.7 V with ±2.5% accuracy over temperature and supply voltage. This value is trimmed during manufacturing and specified under recommended operating conditions (−40°C to +85°C). The LM8365BALMFX22 uses this threshold to assert its active-low RESET output when the INPUT voltage falls below 2.7 V, ensuring reliable brownout protection for 3 V systems.
How is the reset delay programmed on the LM8365BALMFX22?
The reset delay of the LM8365BALMFX22 is programmed by connecting an external capacitor between the CD pin (Pin 5) and GND. A 0.1 μF capacitor yields a typical delay of 130 ms; delay scales approximately linearly with capacitance (e.g., 1 μF ≈ 1.2 s). The internal 1 MΩ pull-up resistor charges the capacitor to 0.675 × VIN, and RESET returns high only after that threshold is crossed - ensuring predictable, noise-immune timing without external timing ICs.
What package type does the LM8365BALMFX22 use?
The LM8365BALMFX22 is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm with 1.45 mm maximum height. It follows JEDEC MO-178 mechanical standards and features gull-wing leads compatible with standard reflow processes (MSL Level-1, 260°C peak). Pin 1 is located in quadrant Q3 per tape-and-reel orientation, and Pin 4 is internally not connected.
Does the LM8365BALMFX22 require an external pull-up resistor on the RESET pin?
Yes, the LM8365BALMFX22 features an open-drain RESET output (Pin 1) and requires an external pull-up resistor to establish a valid logic-high level. A 470 kΩ resistor to VIN is recommended per TI's typical application circuit. This configuration allows the LM8365BALMFX22 to interface with multiple logic families and supports wired-OR reset buses - a key advantage over push-pull alternatives.
What is the minimum operating input voltage for the LM8365BALMFX22?
The LM8365BALMFX22 operates down to 1 V on its INPUT pin (Pin 2), enabling direct monitoring of single-cell alkaline or NiMH batteries, low-voltage LiFePO₄ cells, or partially discharged Li-ion sources. At 1 V, the device maintains functional reset assertion with specified hysteresis and delay behavior, though quiescent current increases slightly above the 0.62 μA typical value measured at 2.6 V.
LM8365BALMFX22 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:
- 2.2V
- 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
LM8365BALMFX22 FAQ
1.How can I place an order for LM8365BALMFX22 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM8365BALMFX22 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 LM8365BALMFX22 reliable?
The price and inventory of LM8365BALMFX22 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM8365BALMFX22 is usually 5 days.
3.What payment methods are accepted for LM8365BALMFX22?
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4.How is shipping managed for LM8365BALMFX22?
LM8365BALMFX22 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM8365BALMFX22 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 LM8365BALMFX22?
For technical support, including LM8365BALMFX22 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM8365BALMFX22 requirements.
6.How does Aetrix verify that LM8365BALMFX22 is sourced from the original manufacturer or authorized distributors?
All LM8365BALMFX22 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 LM8365BALMFX22 meets industry standards.
7.What is the process for return or replacement of LM8365BALMFX22?
All LM8365BALMFX22 units undergo pre-shipment inspection (PSI). If there is an issue with LM8365BALMFX22, 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 LM8365BALMFX22 part is unused and in its original packaging.
Return procedure for LM8365BALMFX22:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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