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Texas Instruments LM26LVCISDX-050/NOPB
- Part No.:
- LM26LVCISDX-050/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Thermostats - Solid State
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
LM26LVCISDX-050/NOPB.pdf
- Description:
- THERMOSTAT 50DEG ACT HI/LO 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,896
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Product details
Overview
LM26LVCISDX-050/NOPB from Texas Instruments is a factory-preset, dual-output temperature monitoring IC with active-high push-pull and active-low open-drain overtemperature switch outputs plus a linear NTC analog VTEMP sensor output. It operates from 1.6 V to 5.5 V, features 5°C hysteresis, ±2.3°C trip point accuracy over –50°C to 150°C, and delivers precise thermal protection in battery-powered and low-voltage embedded systems.
For engineers reviewing the LM26LVCISDX-050/NOPB datasheet, LM26LVCISDX-050/NOPB pinout, LM26LVCISDX-050/NOPB application, or LM26LVCISDX-050/NOPB equivalent, key selection criteria include its WSON-6 package, factory-trip point of 50°C, dual digital output architecture, VTEMP gain configuration (Gain 1), and compatibility with 1.6-V system rails.
Technical Context
The LM26LVCISDX-050/NOPB integrates an internal reference DAC, analog temperature sensor, and comparator to generate two independent digital overtemperature signals - one push-pull (OVERTEMP) and one open-drain (OVERTEMP) - alongside a programmable-gain analog voltage output (VTEMP). Its trip point is fixed at 50°C during manufacturing, corresponding to Gain 1 (–5.1 mV/°C) for the VTEMP transfer function.
Operation includes TRIP_TEST input for in-system functional verification: asserting TRIP_TEST forces both digital outputs active and presents VTRIP (trip-reference voltage) at VTEMP. Hysteresis is fixed at 5°C, ensuring stable switching without oscillation near the threshold. The device supports latching behavior when OVERTEMP is tied to TRIP_TEST.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Trip Point | Factory preset to 50°C - defines exact thermal shutdown threshold for system-level safety logic. |
| Hysteresis | Fixed 5°C - prevents output chatter during slow temperature transitions near trip point. | Supply Voltage | 1.6 V to 5.5 V - enables direct integration into 1.8-V and 3.3-V domains without level-shifting. |
| Quiescent Current | 8 µA typical - minimizes battery drain in always-on thermal monitoring applications. |
| VTEMP Gain | –5.1 mV/°C (Gain 1) - calibrated for 0°C–69°C trip range; provides linear NTC output for precision temperature readback. |
| Accuracy | ±2.3°C over –50°C to 150°C - ensures reliable trip timing across industrial and automotive ambient extremes. |
| Output Types | Push-pull (OVERTEMP) + open-drain (OVERTEMP) - supports direct connection to MCU GPIOs or external pull-up networks. |
Pinout & Package
LM26LVCISDX-050/NOPB is housed in a thermally enhanced 6-pin WSON package (2.2 mm × 2.5 mm, 0.5-mm pitch) with exposed thermal pad. The pad must be soldered to PCB ground for optimal thermal performance and noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TRIP_TEST (Pin 1) | Digital input | Active-high test enable: forces digital outputs active and outputs VTRIP on VTEMP for production verification. |
| VDD (Pin 4) | Power supply | 1.6–5.5 V input; powers internal sensor, DAC, and output drivers. |
| GND (Pin 2) | Ground reference | Primary return path; thermal pad should connect directly to this node for EMI suppression. |
| OVERTEMP (Pin 5) | Digital output | Active-high, push-pull - drives high without external pull-up; asserts at T ≥ 50°C. |
| OVERTEMP (Pin 3) | Digital output | Active-low, open-drain - requires external pull-up; asserts (goes low) at T ≥ 50°C. |
| VTEMP (Pin 6) | Analog output | NTC voltage output (Gain 1); delivers ~1061 mV at 0°C, decreasing ~5.1 mV per °C rise. |
Key Features
| Feature | Design Value |
|---|---|
| Latching capability via TRIP_TEST tie-back | Enables persistent fault indication until system reset or power cycle - critical for safety-critical thermal events. |
| VTEMP short-circuit protection | Prevents damage during accidental probe contact or PCB trace shorts - improves field reliability. |
| Excellent supply noise rejection | –82 dB typical - maintains accurate trip timing in noisy DC-DC converter environments. |
| Factory-trimmed trip point | Eliminates need for external calibration components or firmware compensation - reduces BOM and validation effort. |
| Low-voltage operation down to 1.6 V | Supports direct interface with ultra-low-power MCUs and battery-supplied subsystems without regulators. |
Applications
| Smartphone Battery Protection | Industrial Motor Drive Thermal Monitoring |
|---|---|
Use Scenario: Monitors Li-ion battery pack die temperature during fast charging to prevent thermal runaway. IC Role / Device Role / Timing Role: Dual-output thermal switch triggers immediate charge termination (via OVERTEMP) and logs temperature history (via VTEMP). Use Value: Factory-set 50°C trip ensures consistent, repeatable safety response across production units without calibration. | Use Scenario: Detects IGBT junction overheating in servo drive inverters operating in sealed enclosures. IC Role / Device Role / Timing Role: Push-pull OVERTEMP drives hardware shutdown circuit; open-drain OVERTEMP feeds PLC alarm input. Use Value: 5°C hysteresis prevents nuisance tripping during transient thermal spikes under load cycling. |
| Automotive Cabin Air Heater Control | Medical Infusion Pump Temperature Safety |
Use Scenario: Guards against heater element overheating in HVAC modules where ambient can exceed 85°C. IC Role / Device Role / Timing Role: VTEMP provides real-time feedback to microcontroller; OVERTEMP initiates emergency cut-off. Use Value: ±2.3°C accuracy over –40°C to 150°C ensures compliance with AEC-Q100 Grade 0 requirements. | Use Scenario: Ensures infusion tubing heater stays within safe skin-contact limits (≤43°C) during continuous operation. IC Role / Device Role / Timing Role: LM26LVCISDX-050/NOPB acts as independent hardware thermal cutoff, redundant to software control. Use Value: Latching behavior (when OVERTEMP tied to TRIP_TEST) guarantees fault persistence until manual reset - meeting IEC 62304 safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature switch and sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM26LVISDX-050/NOPB | No Q1 qualification; identical electrical specs and pinout - same WSON-6 package and 50°C trip point. | Not AEC-Q100 qualified; suitable for commercial/industrial use only - not for automotive safety-critical functions. | Select when automotive qualification is unnecessary and cost sensitivity is higher. |
| MAX6505UTP50+T | Single open-drain output only; no VTEMP analog output or push-pull option; 50°C trip, SOT23-5 package. | Lacks analog sensing and dual-output flexibility - limited to basic overtemperature flagging. | Choose only if system requires minimal footprint and analog readback is handled elsewhere. |
Compared with LM26LVISDX-050/NOPB, the LM26LVCISDX-050/NOPB adds AEC-Q100 Grade 0 qualification for automotive use; versus MAX6505UTP50+T, it provides full dual-output functionality and integrated analog sensing - enabling both hardware shutdown and closed-loop thermal management.
Availability
LM26LVCISDX-050/NOPB is available at Aetrix Electronics and suitable for battery management systems, automotive cabin electronics, industrial motor controls, and medical thermal safety circuits requiring stable component supply and long-term lifecycle support.
Supply support for LM26LVCISDX-050/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 leader delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LM26LV family was designed specifically for precision, low-voltage thermal monitoring in space-constrained, power-sensitive applications - combining factory-programmable trip points with dual digital outputs and analog sensor capability in a single WSON package.
FAQ
What is the factory-set trip temperature for LM26LVCISDX-050/NOPB?
The LM26LVCISDX-050/NOPB has a factory-preset overtemperature trip point of exactly 50°C. This value is laser-trimmed during manufacturing and cannot be adjusted in-circuit. The hysteresis is fixed at 5°C, so the output resets when temperature falls to 45°C. This specification is verified across –50°C to 150°C ambient and applies to both OVERTEMP and OVERTEMP outputs.
Does LM26LVCISDX-050/NOPB require external components for basic operation?
No, LM26LVCISDX-050/NOPB operates autonomously with only VDD, GND, and optional pull-up on OVERTEMP. The push-pull OVERTEMP output needs no external resistor. VTEMP requires no loading for basic functionality but benefits from ≤1100 pF capacitive load. TRIP_TEST may be left floating (default operation) or driven high for test mode. Thermal pad must be soldered to PCB ground.
How does the VTEMP output behave when TRIP_TEST is asserted on LM26LVCISDX-050/NOPB?
When TRIP_TEST is driven high, LM26LVCISDX-050/NOPB asserts both OVERTEMP (high) and OVERTEMP (low) and routes the internal trip-reference voltage (VTRIP) to the VTEMP pin instead of the normal temperature-sensing voltage (VTS). This allows direct measurement of the trip threshold voltage for production verification - confirming comparator functionality and trip-point accuracy without thermal chamber cycling.
Is LM26LVCISDX-050/NOPB pin-compatible with other LM26LV variants?
Yes, all LM26LV family members including LM26LVCISDX-050/NOPB share identical WSON-6 pinout and electrical interface. Pin 1 is TRIP_TEST, Pin 2 is GND, Pin 3 is OVERTEMP, Pin 4 is VDD, Pin 5 is OVERTEMP, and Pin 6 is VTEMP. Mechanical and thermal pad layout are identical across the series - enabling drop-in replacement for different trip points or qualification grades.
What is the maximum allowable capacitive load on the VTEMP pin of LM26LVCISDX-050/NOPB?
The VTEMP pin of LM26LVCISDX-050/NOPB supports up to 1100 pF of total capacitive load without stability issues. This includes PCB trace capacitance and any external filter capacitor. Exceeding this limit may cause overshoot or extended settling time (>2.9 ms) before analog output reaches valid temperature data after power-up. For best accuracy, minimize trace length and avoid unnecessary capacitance.
LM26LVCISDX-050/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Trip Temperature Threshold:
- Hot
- Switching Temperature:
- 50°C
- Accuracy:
- ±2.2°C
- Current - Output (Max):
- 7mA
- Output Type:
- Open Drain, Push-Pull
- Output:
- Active High, Active Low
- Output Function:
- OverTemp, /OverTemp, VTemp
- Selectable Hysteresis:
- No
- Features:
- Trip Test
- Voltage - Supply:
- 1.6 V ~ 5.5 V
- Current - Supply:
- 8µA
- Operating Temperature:
- -50°C ~ 150°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 6-WSON (2.2x2.5)
LM26LVCISDX-050/NOPB FAQ
1.How can I place an order for LM26LVCISDX-050/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM26LVCISDX-050/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 LM26LVCISDX-050/NOPB reliable?
The price and inventory of LM26LVCISDX-050/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM26LVCISDX-050/NOPB is usually 5 days.
3.What payment methods are accepted for LM26LVCISDX-050/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM26LVCISDX-050/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM26LVCISDX-050/NOPB?
LM26LVCISDX-050/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM26LVCISDX-050/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 LM26LVCISDX-050/NOPB?
For technical support, including LM26LVCISDX-050/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM26LVCISDX-050/NOPB requirements.
6.How does Aetrix verify that LM26LVCISDX-050/NOPB is sourced from the original manufacturer or authorized distributors?
All LM26LVCISDX-050/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 LM26LVCISDX-050/NOPB meets industry standards.
7.What is the process for return or replacement of LM26LVCISDX-050/NOPB?
All LM26LVCISDX-050/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM26LVCISDX-050/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 LM26LVCISDX-050/NOPB part is unused and in its original packaging.
Return procedure for LM26LVCISDX-050/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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