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Texas Instruments LM26CIM5-YHA/NOPB
- Part No.:
- LM26CIM5-YHA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Thermostats - Solid State
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM26CIM5-YHA/NOPB.pdf
- Description:
- THERMOSTAT 110DEG ACT LO SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,389
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Product details
Overview
LM26CIM5-YHA/NOPB from Texas Instruments is a factory-preset, ±3°C accurate digital-output thermostat with fixed 110°C overtemperature shutdown trip point, open-drain active-low OS output, and programmable 2°C/10°C hysteresis via HYST pin. It integrates temperature sensor, reference, DAC, and comparator in a 5-pin SOT-23 package and delivers VTEMP analog output for post-assembly validation in thermal protection circuits.
For engineers reviewing the LM26CIM5-YHA/NOPB datasheet, LM26CIM5-YHA/NOPB pinout, LM26CIM5-YHA/NOPB application, or LM26CIM5-YHA/NOPB equivalent, key selection criteria include trip point accuracy (±3°C), hysteresis configurability, VTEMP slope (−10.82 mV/°C), supply current (16 µA typical), and open-drain output compatibility with 2.7–5.5 V systems requiring reliable thermal shutdown without external components.
Technical Context
The LM26CIM5-YHA/NOPB implements a precision analog temperature sensing front-end feeding an internal comparator with factory-trimmed reference and DAC, enabling fixed 110°C trip point detection. Its VTEMP output follows a quadratic voltage-vs.-temperature equation with −10.82 mV/°C nominal slope and ±3°C sensitivity error across −55°C to +120°C.
Hysteresis is digitally selected via HYST pin logic level: GND yields 10°C, V+ yields 2°C-preventing output chatter near threshold. The open-drain OS output requires ≥10 kΩ pullup and asserts LOW at die temperature ≥110°C, releasing HIGH only after cooling to ≤108°C (2°C hysteresis) or ≤100°C (10°C hysteresis).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Trip Point | Fixed 110°C overtemperature shutdown; triggers system power-down or fan activation when die reaches this threshold. |
| Trip Accuracy | ±3°C over −55°C to +110°C; ensures reliable thermal margin without calibration in production environments. |
| Hysteresis | 2°C (HYST = V+) or 10°C (HYST = GND); prevents oscillation during slow temperature transitions near trip point. |
| VTEMP Slope | −10.82 mV/°C; enables direct temperature readback using external ADC for diagnostics or closed-loop control. |
| Supply Current | 16 µA typical at 25°C; supports ultra-low-power battery-operated thermal monitoring with minimal impact on system budget. |
| Supply Voltage | 2.7 V to 5.5 V; compatible with common microcontroller I/O rails and industrial 3.3 V/5 V domains without level-shifting. |
| Output Type | Open-drain active-low OS; interfaces directly with MCU interrupt pins or logic-level MOSFET gates using standard pullup resistors. |
Pinout & Package
LM26CIM5-YHA/NOPB is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, with exposed thermal pad connected to GND (pin 2) for enhanced thermal coupling to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - HYST | Digital input | Selects hysteresis: GND = 10°C, V+ = 2°C; high-impedance input (<10 µA leakage) allows direct connection without series resistor in most cases. |
| 2 - GND | Power ground | Backside die attachment point; must connect to system ground plane for accurate thermal conduction and noise immunity. |
| 3 - VTEMP | Analog output | Quadratic voltage output proportional to die temperature; weak drive capability (1 µA source / 40 µA sink) requires high-Z ADC or buffered interface. |
| 4 - V+ | Power supply | 2.7–5.5 V input; requires 0.1 µF ceramic bypass capacitor placed adjacent to pin for noise rejection. |
| 5 - OS | Digital output | Open-drain active-low overtemperature signal; sinks current when T ≥ 110°C; needs external pullup to V+ or controller rail. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-preset trip point | 110°C set at wafer level-no external resistor network or trimming required for deployment. |
| VTEMP analog output | Enables post-assembly functional test by forcing VTEMP to verify comparator and output stage operation without thermal chamber. |
| No external components | Operates standalone with only bypass cap; eliminates BOM cost, layout area, and calibration labor for basic thermal cutoff. |
| Power supply noise rejection | Immune to 400 kHz square wave (1 Vpp) and 100 Hz–1 MHz sine waves (200 mVpp) on V+, preventing false trips in noisy environments. |
| UL recognition | Meets UL 1577 requirements for reinforced insulation-supports safety-critical thermal shutdown in certified end equipment. |
Applications
| Microprocessor Thermal Management | Fan Control |
|---|---|
Use Scenario: Monitors CPU die temperature in embedded computing modules to prevent thermal throttling or permanent damage. IC Role / Device Role / Timing Role: Digital thermostat providing hard overtemperature shutdown signal to power management IC or reset controller. Use Value: Fixed 110°C trip point aligns with common processor thermal limits; ±3°C accuracy ensures shutdown occurs before silicon reliability degradation begins. | Use Scenario: Controls two-speed DC fan in industrial power supplies based on heatsink temperature. IC Role / Device Role / Timing Role: Overtemperature switch asserting OS low to enable high-speed fan mode when heatsink exceeds safe operating range. Use Value: Programmable 2°C/10°C hysteresis prevents fan hunting during transient thermal loads; open-drain output simplifies interface with fan driver logic. |
| Industrial Process Control | Electronic System Protection |
Use Scenario: Safeguards motor drives against winding overheating in factory automation systems. IC Role / Device Role / Timing Role: Standalone thermal cutoff device mounted directly on motor driver PCB to monitor MOSFET junction temperature. Use Value: SOT-23 footprint minimizes board space; VTEMP output allows periodic health check via host MCU ADC without dedicated sensor channel. | Use Scenario: Protects battery-powered medical devices from thermal runaway during charging or high-load operation. IC Role / Device Role / Timing Role: Final-stage thermal guard triggering immediate power disconnect when enclosure temperature exceeds 110°C. Use Value: 16 µA quiescent current extends battery life; UL recognition satisfies IEC 60601-1 safety compliance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar thermostat applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM26CIM5-XHA/NOPB | Fixed 100°C trip point; identical pinout, hysteresis options, and VTEMP functionality. | Suitable where lower thermal margin is acceptable (e.g., plastic enclosures with lower ignition risk). | Select when system thermal design targets 100°C shutdown instead of 110°C. |
| LM26CIM5-VHA/NOPB | Fixed 90°C trip point; same package, supply range, and output configuration. | Preferred for early-warning thermal management in consumer electronics with tighter ambient constraints. | Choose for applications requiring earlier intervention before critical component derating begins. |
Compared with LM26CIM5-XHA/NOPB and LM26CIM5-VHA/NOPB, the LM26CIM5-YHA/NOPB provides the highest trip point in the LM26 family, making it optimal for high-temperature industrial environments where thermal inertia delays response and maximum allowable die temperature approaches 110°C.
Availability
LM26CIM5-YHA/NOPB is available at Aetrix Electronics and suitable for microprocessor thermal management, fan control, industrial process control, and electronic system protection requiring stable component supply across long-lifecycle industrial programs.
Supply support for LM26CIM5-YHA/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 for industrial, automotive, and personal electronics markets.
The LM26 product line delivers factory-programmable thermostats for precise overtemperature shutdown in space-constrained, low-power applications where calibration-free reliability is essential.
FAQ
What is the exact trip temperature of LM26CIM5-YHA/NOPB and how is it programmed?
The LM26CIM5-YHA/NOPB has a fixed factory-programmed trip point of 110°C for overtemperature shutdown. This value is laser-trimmed during wafer fabrication and cannot be adjusted externally. The 'YHA' suffix in the part number explicitly denotes the 110°C setting per TI's LM26 device comparison table, and no resistor network or digital interface is required to set or modify this threshold.
Does LM26CIM5-YHA/NOPB support both overtemperature and undertemperature shutdown modes?
No. The LM26CIM5-YHA/NOPB is configured exclusively for overtemperature shutdown (OS) with active-low open-drain output. Its factory programming fixes the function to OS-not US-and the trip point is unidirectional (110°C). Other variants like LM26CIM5-HHD support undertemperature, but LM26CIM5-YHA/NOPB does not implement US functionality.
How do I configure hysteresis on LM26CIM5-YHA/NOPB and what are the valid options?
Hysteresis on LM26CIM5-YHA/NOPB is selected by the logic level applied to the HYST pin: connect HYST to GND for 10°C hysteresis or to V+ for 2°C hysteresis. These are the only two supported values-no intermediate settings exist. The hysteresis determines the temperature drop required (110°C → 108°C or 100°C) before OS releases HIGH after triggering.
Can LM26CIM5-YHA/NOPB be used for temperature measurement, and what is the accuracy of its VTEMP output?
Yes. The VTEMP pin provides a calibrated analog voltage proportional to die temperature, following VO = (−3.479 × 10⁻⁶ × (T − 30)²) + (−1.082 × 10⁻² × (T − 30)) + 1.8015 V. Its temperature sensitivity error is ±3°C across −30°C to +120°C, and load regulation error is ≤0.7 mV under 40 µA sink, enabling diagnostic readback but not metrology-grade measurement.
Is LM26CIM5-YHA/NOPB RoHS-compliant and what packaging does it ship in?
Yes. LM26CIM5-YHA/NOPB carries the '/NOPB' suffix indicating lead-free (RoHS-compliant) finish. It ships in tape-and-reel format per JEDEC standard for SOT-23 packages, with 3000 units per reel. The device is qualified per TI's green packaging standards and meets IPC/JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) requirements.
LM26CIM5-YHA/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Trip Temperature Threshold:
- Hot
- Switching Temperature:
- 110°C
- Accuracy:
- ±3°C
- Current - Output (Max):
- -
- Output Type:
- Open Drain
- Output:
- Active Low
- Output Function:
- /OverTemp
- Selectable Hysteresis:
- Yes
- Features:
- -
- Voltage - Supply:
- 2.7 V ~ 5.5 V
- Current - Supply:
- 16µA
- Operating Temperature:
- -55°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-23-5
LM26CIM5-YHA/NOPB FAQ
1.How can I place an order for LM26CIM5-YHA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM26CIM5-YHA/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 LM26CIM5-YHA/NOPB reliable?
The price and inventory of LM26CIM5-YHA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM26CIM5-YHA/NOPB is usually 5 days.
3.What payment methods are accepted for LM26CIM5-YHA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM26CIM5-YHA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM26CIM5-YHA/NOPB?
LM26CIM5-YHA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM26CIM5-YHA/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 LM26CIM5-YHA/NOPB?
For technical support, including LM26CIM5-YHA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM26CIM5-YHA/NOPB requirements.
6.How does Aetrix verify that LM26CIM5-YHA/NOPB is sourced from the original manufacturer or authorized distributors?
All LM26CIM5-YHA/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 LM26CIM5-YHA/NOPB meets industry standards.
7.What is the process for return or replacement of LM26CIM5-YHA/NOPB?
All LM26CIM5-YHA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM26CIM5-YHA/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 LM26CIM5-YHA/NOPB part is unused and in its original packaging.
Return procedure for LM26CIM5-YHA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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