LM35CZ/LFT4 Temperature Sensor - Equivalent & Substitute Parts

Part Overview

The LM35CZ/LFT4 is an analog temperature sensor manufactured by Texas Instruments, designed for local temperature measurement across the -40°C to 110°C range with 10mV/°C output resolution. The device operates from a 4V to 30V supply and delivers ±1°C accuracy at 25°C test conditions. This part is classified as obsolete, making identification of active equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

LM35CZ/LFT4

Texas InstrumentsIn Stock: 923LM35CZ/LFT4 Datasheet

Current PartRFQ

LM35CZ/NOPB

National SemiconductorIn Stock: 5027LM35CZ/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM35CZ/LFT4 is determined by strict equivalence across the following critical parameters:

• Sensor Type & Output: Analog, Local temperature measurement with Analog Voltage output
• Temperature Range: -40°C to 110°C sensing capability
• Resolution & Accuracy: 10mV/°C output with ±1°C accuracy at 25°C
• Supply Voltage: 4V to 30V operating range
• Package & Mounting: TO-92-3 through-hole configuration
• Electrical Specifications: Identical voltage supply, resolution, and accuracy requirements

The LM35CZ/NOPB variant meets all these criteria as a direct functional equivalent, with the primary distinction being active product status and manufacturer designation.

Parameter Comparison

Engineering Selection Recommendations

The LM35CZ/NOPB is a direct substitute for the obsolete LM35CZ/LFT4. Both devices are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The LM35CZ/NOPB maintains active product status, ensuring continued availability and supply chain stability. All electrical parameters, package specifications, and performance characteristics are identical, permitting direct replacement without circuit modification or re-qualification.

Frequently Asked Questions (FAQ)

Q: Can the LM35CZ/NOPB be used as a direct replacement for the LM35CZ/LFT4?

A: Yes. Both devices share identical sensor type, temperature range, resolution, accuracy, supply voltage, and TO-92-3 package specifications. Direct substitution is permissible without design changes.

Q: What is the primary difference between these two part numbers?

A: The LM35CZ/LFT4 is obsolete, while the LM35CZ/NOPB maintains active product status. The manufacturer designation differs (Texas Instruments vs. National Semiconductor), but electrical and mechanical specifications are equivalent.

Q: Are there any compliance or certification differences?

A: No. Both parts are ROHS3 compliant and REACH unaffected, meeting identical regulatory standards.

Q: Is the TO-92-3 package compatible with existing PCB designs?

A: Yes. Both parts use the TO-92-3 through-hole package, maintaining identical footprint and mounting compatibility with existing circuit board layouts.

Q: What supply voltage range is required for operation?

A: Both devices operate across 4V to 30V, providing flexibility for various power supply configurations.