LM45BIM3 Equivalent & Substitute Parts

Part Overview

The LM45BIM3 is an analog local temperature sensor manufactured by Texas Instruments, operating across a -20°C to 100°C range with 10mV/°C resolution. The device is classified as "Not For New Designs," indicating it has reached end-of-life status. This obsolescence necessitates identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility while meeting current design standards and compliance requirements.

Key Parameters

Parameter	LM45BIM3
Manufacturer	Texas Instruments
Sensor Type	Analog, Local
Sensing Temperature Range	-20°C ~ 100°C
Output Type	Analog Voltage
Supply Voltage	4V ~ 10V
Resolution	10mV/°C
Accuracy	±2°C (±3°C)
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
Product Status	Not For New Designs
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Primary Compatibility Requirements:

Package / Case: TO-236-3, SC-59, SOT-23-3 (all substitutes maintain this specification)
Mounting Type: Surface Mount (all substitutes are surface mount)
Output Type: Analog Voltage (all substitutes provide analog voltage output)
Sensor Type: Analog, Local (all substitutes are analog local temperature sensors)

Functional Compatibility Considerations:

Sensing Temperature Range: The LM45BIM3 operates -20°C to 100°C. Substitutes with extended ranges (-40°C to 125°C) are functionally compatible for applications within the original range.
Resolution: The LM45BIM3 provides 10mV/°C. Substitutes with different resolutions (6.25mV/°C or 19.5mV/°C) alter output sensitivity and require circuit recalibration.
Supply Voltage: The LM45BIM3 requires 4V to 10V. Substitutes with lower minimum voltage requirements (2.3V, 2.5V, 2.7V, or 3.1V) are compatible with the original supply range.
Accuracy: All identified substitutes maintain ±2°C to ±4°C accuracy specifications, consistent with the original device.

Compliance Considerations:

RoHS Status: The LM45BIM3 is RoHS non-compliant. All substitute parts are ROHS3 compliant, meeting current environmental regulations.
REACH Status: The LM45BIM3 is REACH Affected. All substitute parts are REACH Unaffected.

Parameter Comparison

Part Number	Manufacturer	Sensing Temperature Range	Resolution	Supply Voltage	Accuracy	Package	Product Status	RoHS Status
LM45BIM3	Texas Instruments	-20°C ~ 100°C	10mV/°C	4V ~ 10V	±2°C (±3°C)	SOT-23-3	Not For New Designs	RoHS non-compliant
LM45BIM3/NOPB	Texas Instruments	-20°C ~ 100°C	10mV/°C	4V ~ 10V	±2°C (±3°C)	SOT-23-3	Obsolete	ROHS3 Compliant
DS60R+T&R	Analog Devices Inc./Maxim Integrated	-40°C ~ 125°C	6.25mV/°C	2.7V ~ 5.5V	±2°C (±3°C)	SOT-23-3	Active	ROHS3 Compliant
MCP9700AT-E/TT	Microchip Technology	-40°C ~ 125°C	10mV/°C	2.3V ~ 5.5V	±2°C (-2°C, +4°C)	SOT-23-3	Active	ROHS3 Compliant
MCP9700T-E/TT	Microchip Technology	-40°C ~ 125°C	10mV/°C	2.3V ~ 5.5V	±2°C (-4°C, +6°C)	SOT-23-3	Active	ROHS3 Compliant
MCP9701AT-E/TT	Microchip Technology	-10°C ~ 125°C	19.5mV/°C	3.1V ~ 5.5V	±2°C (-2°C, +4°C)	SOT-23-3	Active	ROHS3 Compliant
MCP9701T-E/TT	Microchip Technology	-10°C ~ 125°C	19.5mV/°C	3.1V ~ 5.5V	±4°C (-4°C, +6°C)	SOT-23-3	Active	ROHS3 Compliant
TC1046VNBTR	Microchip Technology	-40°C ~ 125°C	6.25mV/°C	2.7V ~ 4.4V	±2°C (±3°C)	SOT-23-3	Active	ROHS3 Compliant
TC1047AVNBTR	Microchip Technology	-40°C ~ 125°C	10mV/°C	2.5V ~ 5.5V	±2°C (±3°C)	SOT-23-3	Active	ROHS3 Compliant
TC1047VNBTR	Microchip Technology	-40°C ~ 125°C	10mV/°C	2.7V ~ 4.4V	±2°C (±3°C)	SOT-23-3	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Identical Electrical Characteristics):

LM45BIM3/NOPB is the direct equivalent of LM45BIM3, maintaining identical electrical specifications including -20°C to 100°C sensing range, 10mV/°C resolution, 4V to 10V supply voltage, and ±2°C accuracy. The primary distinction is ROHS3 compliance, making this the preferred choice for new procurement when the original temperature range and resolution are required.

Extended Range Substitutes with Matching Resolution:

TC1047AVNBTR and TC1047VNBTR both provide 10mV/°C resolution matching the LM45BIM3, with extended operating ranges of -40°C to 125°C. TC1047AVNBTR operates at 2.5V to 5.5V supply voltage, while TC1047VNBTR operates at 2.7V to 4.4V. Both maintain ±2°C accuracy and are Active products with ROHS3 compliance. These are suitable for applications requiring the original resolution within an expanded temperature envelope.

MCP9700AT-E/TT and MCP9700T-E/TT provide identical 10mV/°C resolution with -40°C to 125°C range and 2.3V to 5.5V supply voltage compatibility. MCP9700AT-E/TT specifies ±2°C accuracy (-2°C, +4°C), while MCP9700T-E/TT specifies ±2°C accuracy (-4°C, +6°C). Both are Active products with ROHS3 compliance.

Alternative Resolution Substitutes:

DS60R+T&R and TC1046VNBTR provide 6.25mV/°C resolution with -40°C to 125°C range and ±2°C accuracy. These devices require circuit recalibration due to altered output sensitivity. DS60R+T&R operates at 2.7V to 5.5V, while TC1046VNBTR operates at 2.7V to 4.4V.

MCP9701AT-E/TT and MCP9701T-E/TT provide 19.5mV/°C resolution with -10°C to 125°C range. MCP9701AT-E/TT specifies ±2°C accuracy (-2°C, +4°C), while MCP9701T-E/TT specifies ±4°C accuracy (-4°C, +6°C). Both operate at 3.1V to 5.5V supply voltage and require circuit recalibration.

Compliance Status:

All substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The LM45BIM3 is RoHS non-compliant and REACH affected, making substitution necessary for applications subject to these regulations.

Frequently Asked Questions (FAQ)

Q: Can LM45BIM3/NOPB be used as a direct replacement for LM45BIM3?

A: Yes. LM45BIM3/NOPB maintains identical electrical specifications: -20°C to 100°C sensing range, 10mV/°C resolution, 4V to 10V supply voltage, and ±2°C accuracy. The primary difference is ROHS3 compliance. No circuit modifications are required.

Q: What is the difference between TC1047AVNBTR and TC1047VNBTR?

A: Both devices provide 10mV/°C resolution, -40°C to 125°C range, and ±2°C accuracy. The difference is supply voltage range: TC1047AVNBTR operates at 2.5V to 5.5V, while TC1047VNBTR operates at 2.7V to 4.4V. Select based on your circuit's supply voltage specifications.

Q: Why do MCP9700AT-E/TT and MCP9700T-E/TT have different accuracy specifications?

A: Both devices provide 10mV/°C resolution and -40°C to 125°C range. MCP9700AT-E/TT specifies ±2°C accuracy with asymmetric limits (-2°C, +4°C), while MCP9700T-E/TT specifies ±2°C accuracy with asymmetric limits (-4°C, +6°C). Select based on your application's accuracy requirements.

Q: Can I use a substitute with different resolution (6.25mV/°C or 19.5mV/°C) as a direct replacement?

A: No. Devices with different resolutions (DS60R+T&R, TC1046VNBTR at 6.25mV/°C, or MCP9701AT-E/TT, MCP9701T-E/TT at 19.5mV/°C) alter output sensitivity and require circuit recalibration. Use only if your application can accommodate the new resolution or if recalibration is performed.

Q: Are all substitute parts available in SOT-23-3 packaging?

A: Yes. All identified substitute parts are available in SOT-23-3 (TO-236-3, SC-59) packaging, maintaining mechanical compatibility with the original LM45BIM3.

Q: What is the minimum supply voltage for each substitute?

A: LM45BIM3/NOPB requires 4V minimum. DS60R+T&R and TC1046VNBTR require 2.7V minimum. TC1047AVNBTR requires 2.5V minimum. TC1047VNBTR requires 2.7V minimum. MCP9700AT-E/TT and MCP9700T-E/TT require 2.3V minimum. MCP9701AT-E/TT and MCP9701T-E/TT require 3.1V minimum. Select based on your circuit's minimum supply voltage.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts are ROHS3 compliant and REACH unaffected. The original LM45BIM3 is RoHS non-compliant and REACH affected.

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