LM62BIM3X Temperature Sensor Equivalent & Substitute Parts

Part Overview

The LM62BIM3X 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 components is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for applications utilizing this temperature sensing solution.

Key Parameters

Parameter	LM62BIM3X
Manufacturer	Texas Instruments
Product Status	Obsolete
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	±2°C (±2.5°C)
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the LM62BIM3X 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: Analog voltage output sensors are required to maintain signal compatibility with existing analog-to-digital conversion circuits.
Temperature Range Coverage: The substitute must cover the application's operating temperature requirements. The LM62BIM3X operates 0°C ~ 90°C; substitutes with extended ranges (-40°C ~ 125°C) provide broader operational capability.
Output Resolution: Resolution (mV/°C) affects measurement precision. The LM62BIM3X provides 15.6mV/°C; alternatives range from 6.25mV/°C to 19.5mV/°C.
Supply Voltage Compatibility: The substitute must operate within or overlap the system's available supply voltage range.
Accuracy Specification: Accuracy tolerance must meet or exceed the original ±2°C specification.
Regulatory Compliance: RoHS3 compliance status is relevant for new designs and supply chain requirements.

Parameter Comparison

Part Number	Manufacturer	Product Status	Temperature Range	Resolution (mV/°C)	Supply Voltage	Accuracy	Package	RoHS Status
LM62BIM3X	Texas Instruments	Obsolete	0°C ~ 90°C	15.6	2.7V ~ 10V	±2°C	SOT-23-3	Non-compliant
LM62BIM3X/NOPB	National Semiconductor	Active	0°C ~ 90°C	15.6	2.7V ~ 10V	±2°C	SOT-23-3	Not specified
DS60R+T&R	Analog Devices Inc./Maxim Integrated	Active	-40°C ~ 125°C	6.25	2.7V ~ 5.5V	±2°C	SOT-23-3	ROHS3 Compliant
DS60R+U	Analog Devices Inc./Maxim Integrated	Active	-40°C ~ 125°C	6.25	2.7V ~ 5.5V	±2°C	SOT-23-3	ROHS3 Compliant
MCP9700AT-E/TT	Microchip Technology	Active	-40°C ~ 125°C	10	2.3V ~ 5.5V	±2°C	SOT-23-3	ROHS3 Compliant
MCP9700T-E/TT	Microchip Technology	Active	-40°C ~ 125°C	10	2.3V ~ 5.5V	±2°C	SOT-23-3	ROHS3 Compliant
MCP9701AT-E/TT	Microchip Technology	Active	-10°C ~ 125°C	19.5	3.1V ~ 5.5V	±2°C	SOT-23-3	ROHS3 Compliant
TC1046VNBTR	Microchip Technology	Active	-40°C ~ 125°C	6.25	2.7V ~ 4.4V	±2°C	SOT-23-3	ROHS3 Compliant
TC1047AVNBTR	Microchip Technology	Active	-40°C ~ 125°C	10	2.5V ~ 5.5V	±2°C	SOT-23-3	ROHS3 Compliant
KTY82/121,235	NXP USA Inc.	Obsolete	-55°C ~ 150°C	N/A (PTC Thermistor)	N/A	N/A	SOT-23-3	ROHS3 Compliant
KTY82/221,215	NXP USA Inc.	Obsolete	-55°C ~ 150°C	N/A (PTC Thermistor)	N/A	N/A	SOT-23-3	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Active Status)

LM62BIM3X/NOPB is the direct equivalent with identical electrical specifications and temperature range. This part maintains active product status and is the preferred choice for direct replacement when supply is available.

Extended Temperature Range Alternatives (Active Status, RoHS3 Compliant)

For applications requiring extended operating temperature coverage beyond 0°C ~ 90°C, the following active parts provide broader temperature ranges with RoHS3 compliance:

DS60R+T&R and DS60R+U: Operate -40°C ~ 125°C with 6.25mV/°C resolution and ±2°C accuracy. Supply voltage range 2.7V ~ 5.5V is compatible with the original 2.7V minimum but limited to 5.5V maximum.
MCP9700AT-E/TT and MCP9700T-E/TT: Operate -40°C ~ 125°C with 10mV/°C resolution and ±2°C accuracy. Supply voltage 2.3V ~ 5.5V provides lower minimum voltage threshold.
MCP9701AT-E/TT: Operates -10°C ~ 125°C with 19.5mV/°C resolution (highest sensitivity) and ±2°C accuracy. Supply voltage 3.1V ~ 5.5V requires minimum 3.1V.
TC1046VNBTR: Operates -40°C ~ 125°C with 6.25mV/°C resolution and ±2°C accuracy. Supply voltage 2.7V ~ 4.4V is limited to 4.4V maximum.
TC1047AVNBTR: Operates -40°C ~ 125°C with 10mV/°C resolution and ±2°C accuracy. Supply voltage 2.5V ~ 5.5V provides broad compatibility.

Thermistor Alternatives (Obsolete Status)

KTY82/121,235 and KTY82/221,215 are PTC thermistor devices with different operating principles than the LM62BIM3X. These are not direct functional equivalents due to resistance-based output rather than analog voltage output. Selection requires circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can I use any substitute part as a direct drop-in replacement?

A: LM62BIM3X/NOPB is the only direct drop-in replacement with identical electrical specifications and temperature range. Extended-range alternatives require verification that the application does not depend on the specific 0°C ~ 90°C operating window or the 15.6mV/°C output resolution.

Q: What is the key difference between the DS60R, MCP9700, MCP9701, and TC1046/TC1047 series?

A: All are analog voltage output temperature sensors in SOT-23-3 packaging with ±2°C accuracy. Primary differences are output resolution (6.25mV/°C to 19.5mV/°C), temperature range coverage (-40°C ~ 125°C variants), and supply voltage operating windows. Resolution affects measurement precision; lower resolution (6.25mV/°C) requires higher ADC resolution for equivalent accuracy.

Q: Are the KTY82 thermistors suitable replacements?

A: No. KTY82 devices are PTC thermistors with resistance-based output, fundamentally different from the LM62BIM3X voltage output sensor. Substitution requires complete circuit redesign and signal conditioning modifications.

Q: What is the impact of different output resolutions?

A: The LM62BIM3X provides 15.6mV/°C. Alternatives range from 6.25mV/°C to 19.5mV/°C. Higher resolution (19.5mV/°C, MCP9701AT-E/TT) provides finer temperature discrimination but requires lower ADC input range. Lower resolution (6.25mV/°C, DS60R, TC1046VNBTR) requires higher ADC resolution to achieve equivalent temperature measurement precision.

Q: Which substitutes are RoHS3 compliant?

A: DS60R+T&R, DS60R+U, MCP9700AT-E/TT, MCP9700T-E/TT, MCP9701AT-E/TT, TC1046VNBTR, TC1047AVNBTR, KTY82/121,235, and KTY82/221,215 are all ROHS3 compliant. The original LM62BIM3X is RoHS non-compliant.

Q: What supply voltage considerations apply when selecting a substitute?

A: The LM62BIM3X operates 2.7V ~ 10V. Most active substitutes operate 2.3V ~ 5.5V or 2.5V ~ 5.5V, limiting maximum supply to 5.5V. Verify system supply voltage compatibility before selection. TC1046VNBTR is limited to 4.4V maximum.

Q: Can I use MCP9701AT-E/TT if my application only requires 0°C ~ 90°C measurement?

A: Yes. MCP9701AT-E/TT operates -10°C ~ 125°C, which covers the 0°C ~ 90°C requirement. However, its 19.5mV/°C resolution is higher than the LM62BIM3X (15.6mV/°C), requiring circuit verification to confirm ADC input range compatibility and measurement precision requirements are met.

Q: What is the difference between DS60R+T&R and DS60R+U packaging?

A: Both are identical electrically. DS60R+T&R is supplied in Cut Tape (CT) & Digi-Reel packaging; DS60R+U packaging is not specified in the provided data. Selection depends on procurement and assembly requirements.

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