LM89CIMMX Temperature Sensor - Equivalent & Substitute Parts

Part Overview

The LM89CIMMX is a digital temperature sensor manufactured by Texas Instruments, designed for local and remote temperature monitoring applications. It operates across a 0°C to 85°C sensing range with SMBus output interface and 3V to 3.6V supply voltage. The product is currently classified as obsolete, making equivalent substitute parts necessary for ongoing system designs and maintenance applications. Substitute parts must maintain functional compatibility through matching sensor type, output protocol, package form factor, and electrical operating parameters.

Substiute Parts

LM89CIMMX

Texas InstrumentsIn Stock: 9775LM89CIMMX Datasheet

Current PartRFQ

LM89CIMMX/NOPB

Texas InstrumentsIn Stock: 1203LM89CIMMX/NOPB Datasheet

DirectRFQ

SA56004ADP,118

NXP USA Inc.In Stock: 9760SA56004ADP,118 Datasheet

MFR RecommendedRFQ

SA56004CDP,118

NXP USA Inc.In Stock: 1173SA56004CDP,118 Datasheet

MFR RecommendedRFQ

SA56004EDP,118

NXP USA Inc.In Stock: 16077SA56004EDP,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM89CIMMX is determined by the following critical parameters:

Primary Compatibility Criteria:

• Sensor type classification (Digital, Local/Remote)
• Output communication protocol (SMBus/I2C compatibility)
• Package form factor (8-pin TSSOP/VSSOP footprint compatibility)
• Surface mount mounting type

Secondary Compatibility Criteria:

• Supply voltage range overlap with 3V ~ 3.6V minimum requirement
• Resolution capability (minimum 10-bit remote sensing)
• Accuracy specification (±3°C or better)
• Operating temperature range that encompasses 0°C ~ 85°C

The substitute parts identified below satisfy these criteria through direct parameter alignment with the LM89CIMMX functional requirements.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (Highest Compatibility): LM89CIMMX/NOPB is the direct equivalent from Texas Instruments with identical electrical specifications, package form factor, and functional characteristics. This part maintains active product status and achieves ROHS3 compliance, addressing the RoHS non-compliance limitation of the original LM89CIMMX. The only difference is packaging format (Tape & Reel versus bulk), which does not affect electrical or mechanical compatibility.

Extended Range Substitutes (NXP SA56004 Series): The SA56004ADP,118, SA56004CDP,118, and SA56004EDP,118 parts from NXP USA Inc. provide functional substitution with expanded operating specifications. These parts maintain SMBus/I2C protocol compatibility and 8-pin TSSOP package footprint compatibility. The extended temperature sensing range (-40°C ~ 125°C) and improved accuracy (±2°C at nominal conditions) exceed the LM89CIMMX requirements. Supply voltage range expansion (3V ~ 5.5V) provides additional design flexibility. All three SA56004 variants are active products with ROHS3 compliance.

Packaging Availability: SA56004EDP,118 offers the highest inventory availability (16,007 units) in Cut Tape and Digi-Reel packaging format. SA56004ADP,118 and SA56004CDP,118 are available in Tape & Reel format with 9,723 and 1,075 units respectively.

Frequently Asked Questions (FAQ)

Q: Can LM89CIMMX/NOPB be used as a direct drop-in replacement for LM89CIMMX? A: Yes. LM89CIMMX/NOPB is electrically and mechanically identical to LM89CIMMX. The only difference is packaging format (Tape & Reel). Both use 8-VSSOP package and share identical electrical specifications. The primary advantage is active product status and ROHS3 compliance.

Q: Are the NXP SA56004 parts compatible with LM89CIMMX designs? A: Yes, with design considerations. SA56004 parts maintain SMBus/I2C protocol compatibility and use compatible 8-pin TSSOP package footprint. The extended temperature range and improved accuracy are backward-compatible enhancements. Designs operating within the original 0°C ~ 85°C range will function without modification.

Q: What is the package compatibility between 8-VSSOP and 8-TSSOP? A: Both packages are 8-pin surface mount packages with 0.118" width and 3.00mm body width. Pin pitch and footprint are compatible for PCB layout purposes. Physical dimensions are equivalent for standard reflow soldering processes.

Q: Why do the SA56004 parts have wider supply voltage range (3V ~ 5.5V) compared to LM89CIMMX (3V ~ 3.6V)? A: The SA56004 series is designed for broader application compatibility. Designs using 3V ~ 3.6V supply voltage operate within the specified range for both part families. The extended upper limit (5.5V) does not affect designs constrained to 3.6V maximum.

Q: Are all substitute parts ROHS3 compliant? A: LM89CIMMX/NOPB and all SA56004 variants (SA56004ADP,118, SA56004CDP,118, SA56004EDP,118) are ROHS3 compliant. The original LM89CIMMX is RoHS non-compliant. For applications requiring RoHS compliance, use LM89CIMMX/NOPB or SA56004 series parts.

Q: What is the difference between SA56004ADP,118, SA56004CDP,118, and SA56004EDP,118? A: All three parts are functionally identical with matching electrical specifications. The differences are packaging format and inventory availability. SA56004EDP,118 uses Cut Tape and Digi-Reel packaging with highest availability (16,007 units). SA56004ADP,118 and SA56004CDP,118 use Tape & Reel packaging with 9,723 and 1,075 units respectively.