LM75AD,118 Equivalent & Substitute Parts

Part Overview

The LM75AD,118 is a digital temperature sensor manufactured by NXP USA Inc., designed for local temperature measurement across the -55°C to 125°C range with 11-bit resolution and I2C output interface. This component operates on supply voltages between 2.8V and 5.5V and features programmable limits, output switching, and shutdown mode capabilities. The part is currently in active product status with 3,100 units in stock. Equivalent and substitute parts are identified based on matching electrical specifications, package compatibility, and functional feature alignment to support design flexibility and supply chain continuity.

Key Parameters

Parameter	LM75AD,118
Manufacturer	NXP USA Inc.
Sensor Type	Digital, Local
Sensing Temperature Range	-55°C ~ 125°C
Output Type	I2C
Supply Voltage	2.8V ~ 5.5V
Resolution	11 bits
Accuracy (Highest/Lowest)	±2°C / ±3°C
Operating Temperature	-55°C ~ 125°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the LM75AD,118 are qualified based on the following critical parameters:

Electrical Compatibility: Operating temperature range (-55°C ~ 125°C), supply voltage range (minimum 1.7V to 5.5V acceptable), resolution (11 bits), and output interface (I2C/SMBus compatible).

Mechanical Compatibility: Package type (8-SOIC with 0.154" / 3.90mm width), surface mount configuration, and pin count.

Functional Features: Output switch, programmable limits, programmable resolution, and shutdown mode capabilities.

Compliance Requirements: ROHS3 compliance, REACH unaffected status, and active or current product status.

Microchip Technology AT30 series parts (AT30TS74, AT30TS750A, AT30TS75A, AT30TSE752A, AT30TSE754A, AT30TSE758A) meet these criteria with enhanced accuracy specifications (±1°C in highest condition) and extended feature sets including one-shot operation and EEPROM storage on select models. Texas Instruments TMP75AID provides functional equivalence with comparable accuracy and feature set, though marked as obsolete. MCP9844T-BE/MNY operates within compatible temperature and voltage ranges but uses an 8-TDFN package format.

Parameter Comparison

Parameter	LM75AD,118	AT30TS74-SS8M-B	AT30TS74-SS8M-T	AT30TS750A-SS8M-B	AT30TS75A-SS8M-T	AT30TSE752A-SS8M-B	AT30TSE752A-SS8M-T	AT30TSE754A-SS8M-B	AT30TSE758A-SS8M-B	TMP75AID
Manufacturer	NXP USA Inc.	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology	Texas Instruments
Sensor Type	Digital, Local	Digital, Local	Digital, Local	Digital, Local	Digital, Local	Digital, Local	Digital, Local	Digital, Local	Digital, Local	Digital, Local
Sensing Temperature Range	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 125°C
Output Type	I2C	I2C/SMBus	I2C/SMBus	I2C/SMBus	I2C/SMBus	I2C/SMBus	I2C/SMBus	I2C/SMBus	I2C/SMBus	I2C/SMBus
Supply Voltage	2.8V ~ 5.5V	1.7V ~ 5.5V	1.7V ~ 5.5V	1.7V ~ 5.5V	1.7V ~ 5.5V	1.7V ~ 5.5V	1.7V ~ 5.5V	1.7V ~ 5.5V	1.7V ~ 5.5V	2.7V ~ 5.5V
Resolution	11 bits	11 bits	11 bits	11 bits	11 bits	11 bits	11 bits	11 bits	11 bits	11 bits
Accuracy (Highest/Lowest)	±2°C / ±3°C	±2°C / ±3°C	±2°C / ±3°C	±1°C / ±3°C	±1°C / ±3°C	±1°C / ±3°C	±1°C / ±3°C	±1°C / ±3°C	±1°C / ±3°C	±2°C / ±3°C
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 127°C
Package / Case	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active	Obsolete

Engineering Selection Recommendations

Primary Substitutes (Active Status): The Microchip Technology AT30 series parts (AT30TS74-SS8M-B/T, AT30TS750A-SS8M-B, AT30TS75A-SS8M-T, AT30TSE752A-SS8M-B/T, AT30TSE754A-SS8M-B, AT30TSE758A-SS8M-B) are all active products with full ROHS3 compliance and REACH unaffected status. These parts maintain electrical and mechanical compatibility with the LM75AD,118 across all critical parameters. The AT30TSE series offers enhanced accuracy (±1°C highest condition) and additional features including one-shot operation and EEPROM storage. Packaging options include Tube, Cut Tape & Digi-Reel, and Tape & Reel formats to match procurement requirements.

Secondary Substitute (Obsolete Status): The Texas Instruments TMP75AID maintains functional equivalence with comparable accuracy and feature set but is marked as obsolete. This part is suitable only for legacy system support or where existing inventory is available.

Alternative Package Format: The MCP9844T-BE/MNY from Microchip Technology operates within compatible temperature and voltage ranges but uses an 8-TDFN package format instead of 8-SOIC, requiring PCB layout modification.

Frequently Asked Questions (FAQ)

Q: Can AT30TS74-SS8M-B directly replace LM75AD,118 in existing designs? A: Yes. Both parts share identical 8-SOIC package dimensions (0.154" / 3.90mm width), pin count, I2C/SMBus interface compatibility, 11-bit resolution, and -55°C to 125°C operating range. The AT30TS74 operates on a lower minimum supply voltage (1.7V vs. 2.8V) and maintains equivalent accuracy specifications.

Q: What is the difference between AT30TS75A-SS8M-T and AT30TSE752A-SS8M-T? A: Both parts offer ±1°C accuracy (highest condition) and identical electrical specifications. The primary difference is packaging: AT30TS75A-SS8M-T uses Tape & Reel format with MSL 1 (Unlimited moisture sensitivity), while AT30TSE752A-SS8M-T uses Tape & Reel format with MSL 3 (168 Hours). Select based on storage and handling requirements.

Q: Why does AT30TSE758A-SS8M-B show significantly higher inventory? A: AT30TSE758A-SS8M-B has 1,000,399 units in stock compared to other AT30 variants with 1,000-17,000 units. This reflects standard inventory distribution and does not indicate functional superiority. Selection should be based on packaging format (Tube in this case) and feature requirements rather than stock levels.

Q: Is TMP75AID suitable for new designs? A: No. TMP75AID is marked as obsolete and should not be selected for new designs. It is listed for reference only in legacy system support scenarios where existing inventory or compatibility with older designs is required.

Q: What packaging options are available for AT30 series substitutes? A: Microchip AT30 series parts are available in three packaging formats: Tube (AT30TS74-SS8M-B, AT30TS750A-SS8M-B, AT30TSE752A-SS8M-B, AT30TSE754A-SS8M-B, AT30TSE758A-SS8M-B), Cut Tape & Digi-Reel (AT30TS74-SS8M-T), and Tape & Reel (AT30TS75A-SS8M-T, AT30TSE752A-SS8M-T). Select based on assembly process and procurement volume requirements.

Q: Can MCP9844T-BE/MNY be used as a drop-in replacement? A: No. While MCP9844T-BE/MNY maintains compatible temperature range (-40°C to 125°C) and I2C interface, it uses an 8-TDFN package format instead of 8-SOIC. This requires PCB layout modification and is not a direct pin-compatible replacement.

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