LM62CIM3 Temperature Sensor Equivalent & Substitute Parts

Part Overview

The LM62CIM3 is an analog temperature sensor manufactured by Texas Instruments, designed for local temperature measurement in the 0°C to 90°C range with 15.6mV/°C output resolution. The device is packaged in SOT-23-3 (TO-236-3, SC-59) surface mount configuration and operates from 2.7V to 10V supply voltage.

This part is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this temperature sensing solution.

Key Parameters

Parameter	LM62CIM3 Specification
Manufacturer	Texas Instruments
Sensor Type	Analog, Local
Sensing Temperature Range	0°C ~ 90°C
Output Type	Analog Voltage
Resolution	15.6mV/°C
Supply Voltage	2.7V ~ 10V
Accuracy	±3°C (±4°C at 0°C ~ 90°C)
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the LM62CIM3 is determined by the following critical parameters:

Package Compatibility: All substitute parts must use SOT-23-3 (TO-236-3, SC-59) surface mount packaging to ensure mechanical and electrical compatibility with existing PCB layouts.

Sensor Type: Substitute parts must be analog, local temperature sensors with analog voltage output to maintain signal compatibility with existing analog-to-digital conversion circuits.

Temperature Range Coverage: The original part covers 0°C to 90°C. Substitute parts with extended temperature ranges (such as -40°C to 125°C) provide broader operational capability while remaining functionally compatible within the original operating window.

Output Resolution: The LM62CIM3 provides 15.6mV/°C resolution. Substitute parts with different resolutions (10mV/°C, 6.25mV/°C, or 19.5mV/°C) require signal conditioning adjustments but remain electrically compatible.

Supply Voltage Range: The original part operates from 2.7V to 10V. Substitute parts with overlapping or narrower supply ranges remain compatible within the original specification envelope.

Compliance Status: The original part is RoHS non-compliant and obsolete. Substitute parts with ROHS3 compliance and active product status provide regulatory alignment and long-term availability assurance.

Parameter Comparison

Part Number	Manufacturer	Sensor Type	Temperature Range	Resolution	Supply Voltage	Accuracy	Package	Product Status	RoHS Status
LM62CIM3	Texas Instruments	Analog, Local	0°C ~ 90°C	15.6mV/°C	2.7V ~ 10V	±3°C	SOT-23-3	Obsolete	RoHS non-compliant
LM62CIM3/NOPB	Texas Instruments	Analog, Local	0°C ~ 90°C	15.6mV/°C	2.7V ~ 10V	±3°C	SOT-23-3	Obsolete	ROHS3 Compliant
DS60R+T&R	Analog Devices Inc./Maxim Integrated	Analog, Local	-40°C ~ 125°C	6.25mV/°C	2.7V ~ 5.5V	±2°C	SOT-23-3	Active	ROHS3 Compliant
DS60R+U	Analog Devices Inc./Maxim Integrated	Analog, Local	-40°C ~ 125°C	6.25mV/°C	2.7V ~ 5.5V	±2°C	SOT-23-3	Active	ROHS3 Compliant
MCP9700AT-E/TT	Microchip Technology	Analog, Local	-40°C ~ 125°C	10mV/°C	2.3V ~ 5.5V	±2°C	SOT-23-3	Active	ROHS3 Compliant
MCP9700T-E/TT	Microchip Technology	Analog, Local	-40°C ~ 125°C	10mV/°C	2.3V ~ 5.5V	±2°C	SOT-23-3	Active	ROHS3 Compliant
MCP9701AT-E/TT	Microchip Technology	Analog, Local	-10°C ~ 125°C	19.5mV/°C	3.1V ~ 5.5V	±2°C	SOT-23-3	Active	ROHS3 Compliant
TC1046VNBTR	Microchip Technology	Analog, Local	-40°C ~ 125°C	6.25mV/°C	2.7V ~ 4.4V	±2°C	SOT-23-3	Active	ROHS3 Compliant
TC1047AVNBTR	Microchip Technology	Analog, Local	-40°C ~ 125°C	10mV/°C	2.5V ~ 5.5V	±2°C	SOT-23-3	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Identical Specifications): LM62CIM3/NOPB is the direct equivalent of LM62CIM3, maintaining identical electrical and thermal specifications. The primary distinction is RoHS compliance status. This part is recommended for applications requiring exact specification matching and where RoHS3 compliance is required.

Active Product Alternatives (Extended Temperature Range): DS60R+T&R, DS60R+U, MCP9700AT-E/TT, MCP9700T-E/TT, TC1046VNBTR, and TC1047AVNBTR are active products with extended operating temperature ranges (-40°C to 125°C) compared to the original 0°C to 90°C specification. These parts provide superior long-term availability and regulatory compliance. All are ROHS3 compliant and actively manufactured.

Resolution Considerations:

DS60R+T&R and TC1046VNBTR provide 6.25mV/°C resolution (lower sensitivity than original)
MCP9700AT-E/TT, MCP9700T-E/TT, and TC1047AVNBTR provide 10mV/°C resolution (lower sensitivity than original)
MCP9701AT-E/TT provides 19.5mV/°C resolution (higher sensitivity than original)

Applications requiring the original 15.6mV/°C resolution must use LM62CIM3/NOPB or implement signal conditioning for alternative parts.

Supply Voltage Compatibility: All substitute parts operate within or below the original 2.7V to 10V supply range. TC1046VNBTR has the most restrictive upper limit (4.4V), requiring verification against system power supply specifications.

Compliance and Availability: For new designs or production requiring regulatory compliance and assured long-term supply, Microchip Technology active products (MCP9700 and TC1047 series) and Analog Devices DS60R series are recommended over the obsolete Texas Instruments LM62CIM3.

Frequently Asked Questions (FAQ)

Q: Can I directly replace LM62CIM3 with MCP9700AT-E/TT without circuit modifications?

A: Mechanical and electrical pin compatibility is maintained (SOT-23-3 package, analog voltage output). However, the resolution differs (10mV/°C vs. 15.6mV/°C), requiring analog-to-digital converter calibration adjustments. Supply voltage range is compatible (2.3V to 5.5V overlaps with original 2.7V to 10V). Functional substitution is possible with firmware or calibration updates.

Q: What is the difference between MCP9700AT-E/TT and MCP9700T-E/TT?

A: Both parts are functionally equivalent with identical electrical specifications, temperature range, resolution, and package. The primary difference is accuracy specification: MCP9700AT-E/TT specifies ±2°C (-2°C, +4°C) while MCP9700T-E/TT specifies ±2°C (-4°C, +6°C). Selection depends on application accuracy requirements.

Q: Why does MCP9701AT-E/TT have a higher resolution (19.5mV/°C) than the original LM62CIM3?

A: MCP9701AT-E/TT is designed for higher sensitivity applications. The increased resolution provides finer temperature discrimination but requires lower supply voltage (3.1V minimum vs. 2.7V minimum) and narrower temperature range (-10°C to 125°C vs. 0°C to 90°C). This part is suitable only for applications within its specified operating window.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification. The original LM62CIM3 is RoHS non-compliant. LM62CIM3/NOPB provides identical specifications with ROHS3 compliance for regulatory alignment.

Q: What is the impact of different temperature ranges on substitution?

A: The original LM62CIM3 operates 0°C to 90°C. Substitute parts with extended ranges (-40°C to 125°C) provide broader operational capability. Within the original 0°C to 90°C window, extended-range parts maintain specified accuracy and resolution. Extended-range parts are suitable for applications requiring operation beyond the original specification.

Q: Can I use TC1046VNBTR if my system supply voltage is 5V?

A: No. TC1046VNBTR maximum supply voltage is 4.4V. A 5V supply exceeds the absolute maximum rating. Alternative parts with 5V compatibility include MCP9700AT-E/TT, MCP9700T-E/TT, MCP9701AT-E/TT, and TC1047AVNBTR.

Q: Which substitute part provides the closest match to LM62CIM3 specifications?

A: LM62CIM3/NOPB is the direct equivalent, maintaining identical temperature range (0°C to 90°C), resolution (15.6mV/°C), supply voltage (2.7V to 10V), and accuracy (±3°C). The only difference is RoHS3 compliance status.

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