LM63DIMAX Equivalent & Substitute Parts

Part Overview

The LM63DIMAX is a digital temperature sensor with integrated fan control functionality, designed for thermal management applications requiring both local and remote temperature monitoring. Manufactured by Texas Instruments, this component operates across 0°C to 125°C with ±3°C accuracy and communicates via 2-Wire SMBus protocol. The device is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements.

Key Parameters

Parameter	LM63DIMAX
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Function	Fan Control, Temp Monitor
Sensor Type	Internal and External
Sensing Temperature Range	0°C ~ 125°C
Accuracy	±3°C
Output Type	2-Wire SMBus
Output Alarm	Yes
Output Fan	Yes
Supply Voltage	3V ~ 3.6V
Operating Temperature	0°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Primary Compatibility Criteria:

Package / Case: 8-SOIC (0.154", 3.90mm Width)
Output Type: 2-Wire SMBus or SMBus
Sensor Type: Digital, Local/Remote or Internal and External
Mounting Type: Surface Mount
Supply Voltage: Overlapping or compatible range with 3V ~ 3.6V

Secondary Compatibility Criteria:

Sensing Temperature Range: Must encompass or match 0°C ~ 125°C
Accuracy: ±3°C or better
Output Alarm and Fan Control capabilities

Substitute parts are grouped into two categories:

Parametric Equivalents (Texas Instruments LM63 Series): Direct replacements with identical electrical specifications and pinout compatibility. These parts maintain the same base product number (LM63) and function set.

Manufacturer Recommended Alternatives: Components from Analog Devices Inc., onsemi, and Maxim Integrated that meet or exceed the electrical and mechanical requirements while offering improved product status (Active) and RoHS3 compliance.

Parameter Comparison

Part Number	Manufacturer	Product Status	Sensor Type	Sensing Temp (Local)	Accuracy	Supply Voltage	Output Type	Package	RoHS Status
LM63DIMAX	Texas Instruments	Obsolete	Internal and External	0°C ~ 125°C	±3°C	3V ~ 3.6V	2-Wire SMBus	8-SOIC	RoHS non-compliant
LM63CIMAX/NOPB	Texas Instruments	Active	Internal and External	0°C ~ 125°C	±3°C	3V ~ 3.6V	2-Wire SMBus	8-SOIC	ROHS3 Compliant
LM63DIMAX/NOPB	Texas Instruments	Active	Internal and External	0°C ~ 125°C	±3°C	3V ~ 3.6V	2-Wire SMBus	8-SOIC	ROHS3 Compliant
ADM1032ARZ-REEL	Analog Devices Inc.	Active	Digital, Local/Remote	0°C ~ 100°C	±1°C (0°C ~ 100°C)	3V ~ 5.5V	SMBus	8-SOIC	ROHS3 Compliant
ADT7461ARZ-REEL	onsemi	Active	Digital, Local/Remote	-40°C ~ 120°C	±3°C	3V ~ 5.5V	SMBus	8-SOIC	ROHS3 Compliant
MAX6692MSA+	Analog Devices Inc./Maxim Integrated	Active	Digital, Local/Remote	0°C ~ 125°C	±2°C (60°C ~ 100°C)	3V ~ 5.5V	SMBus	8-SOIC	ROHS3 Compliant
MAX6692MSA+T	Analog Devices Inc./Maxim Integrated	Active	Digital, Local/Remote	0°C ~ 125°C	±2°C (60°C ~ 100°C)	3V ~ 5.5V	SMBus	8-SOIC	ROHS3 Compliant
MAX6692YMSA+	Analog Devices Inc./Maxim Integrated	Active	Digital, Local/Remote	0°C ~ 125°C	-4°C (60°C ~ 100°C)	3V ~ 5.5V	SMBus	8-SOIC	ROHS3 Compliant
MAX6692YMSA+T	Analog Devices Inc./Maxim Integrated	Active	Digital, Local/Remote	0°C ~ 125°C	-4°C (60°C ~ 100°C)	3V ~ 5.5V	SMBus	8-SOIC	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Recommended for Existing Designs):

LM63CIMAX/NOPB and LM63DIMAX/NOPB are parametric equivalents to the obsolete LM63DIMAX. Both maintain identical electrical specifications, pinout compatibility, and functional capabilities while offering Active product status and ROHS3 compliance. These components are the preferred choice for designs requiring minimal modification and maximum compatibility assurance.

Alternative Selections (For New Designs and Enhanced Performance):

ADT7461ARZ-REEL (onsemi) provides extended temperature range (-40°C ~ 120°C) with equivalent ±3°C accuracy and broader supply voltage tolerance (3V ~ 5.5V). This component is suitable for applications requiring wider operating temperature margins.

MAX6692 series variants (Analog Devices Inc./Maxim Integrated) offer improved accuracy (±2°C in the 60°C ~ 100°C range) and higher resolution (10-bit) compared to the LM63DIMAX. The MAX6692MSA+, MAX6692MSA+T, MAX6692YMSA+, and MAX6692YMSA+T variants differ in packaging format (Tube vs. Tape & Reel) and accuracy specifications. These components support the full 0°C ~ 125°C sensing range with extended operating temperature (-55°C ~ 125°C).

ADM1032ARZ-REEL (Analog Devices Inc.) delivers superior accuracy (±1°C in the 0°C ~ 100°C range) with 7-bit resolution. This component is applicable for applications where the sensing range is limited to 0°C ~ 100°C and enhanced accuracy is required.

All substitute components are ROHS3 compliant and carry Active product status, ensuring long-term availability and regulatory compliance for production environments.

Frequently Asked Questions (FAQ)

Q: Can LM63CIMAX/NOPB or LM63DIMAX/NOPB be used as direct replacements for the obsolete LM63DIMAX?

A: Yes. Both components are parametric equivalents with identical electrical specifications, sensing temperature range (0°C ~ 125°C), accuracy (±3°C), supply voltage (3V ~ 3.6V), and 8-SOIC package. They maintain full pinout and functional compatibility. The primary difference is product status (Active vs. Obsolete) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What is the key difference between the LM63 series and the MAX6692 series?

A: The LM63 series integrates dedicated fan control output functionality, while the MAX6692 series provides higher resolution (10-bit vs. 8-bit) and improved accuracy (±2°C in the 60°C ~ 100°C range). Both support SMBus communication and 8-SOIC packaging. The MAX6692 series is suitable for applications prioritizing measurement precision over integrated fan control.

Q: Are all substitute parts compatible with 3V ~ 3.6V supply voltage?

A: The LM63 series (LM63CIMAX/NOPB, LM63DIMAX/NOPB) operates within 3V ~ 3.6V. Alternative components (ADM1032ARZ-REEL, ADT7461ARZ-REEL, MAX6692 variants) support broader supply ranges (3V ~ 5.5V), making them compatible with 3V ~ 3.6V systems while offering additional voltage flexibility.

Q: What packaging options are available for the MAX6692 series?

A: MAX6692 variants are available in Tube (MAX6692MSA+, MAX6692YMSA+) and Tape & Reel (MAX6692MSA+T, MAX6692YMSA+T) packaging formats. Selection depends on production volume and assembly requirements. All variants maintain identical electrical specifications and 8-SOIC package dimensions.

Q: Does the ADT7461ARZ-REEL support fan control output like the LM63DIMAX?

A: The ADT7461ARZ-REEL provides output switch and programmable limit features via SMBus but does not include dedicated fan control output. Applications requiring integrated fan speed control should prioritize the LM63 series equivalents (LM63CIMAX/NOPB, LM63DIMAX/NOPB).

Q: What is the accuracy difference between LM63DIMAX and MAX6692 variants?

A: LM63DIMAX specifies ±3°C accuracy across 0°C ~ 125°C. MAX6692MSA+ and MAX6692MSA+T offer ±2°C accuracy in the 60°C ~ 100°C range with ±3°C across the full 0°C ~ 125°C range. MAX6692YMSA+ and MAX6692YMSA+T specify -4°C accuracy in the 60°C ~ 100°C range. Selection depends on the application's temperature operating window and accuracy requirements.

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