LM89-1CIMMX Equivalent & Substitute Parts

Part Overview

The LM89-1CIMMX is a digital temperature sensor manufactured by Texas Instruments, designed for local and remote temperature monitoring across 0°C to 85°C operating range. This component features SMBus output, 7-bit local and 10-bit remote resolution, and operates on 3V to 3.6V supply voltage. The part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements.

Substiute Parts

LM89-1CIMMX

Texas InstrumentsIn Stock: 12142LM89-1CIMMX Datasheet

Current PartRFQ

LM89-1CIMMX/NOPB

Texas InstrumentsIn Stock: 918LM89-1CIMMX/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 is determined by the following critical parameters:

• Sensor Type: Must be Digital, Local/Remote configuration
• Output Interface: Must support SMBus or I2C/SMBus compatibility
• Package Type: Must be 8-TSSOP or 8-VSSOP (0.118", 3.00mm Width)
• Mounting: Surface Mount only
• Temperature Range Coverage: Must encompass or exceed the operating range of the original part
• Supply Voltage Compatibility: Must operate within or extend the 3V to 3.6V range
• Resolution: Minimum 10-bit remote resolution preferred for functional equivalence

The LM89-1CIMMX/NOPB is a direct equivalent with identical electrical specifications but improved product status (Active vs. Obsolete) and RoHS3 compliance. The SA56004 series (SA56004ADP,118; SA56004CDP,118; SA56004EDP,118) from NXP USA Inc. provides functional substitution with extended temperature range (-40°C to 125°C), improved accuracy (±2°C to ±3°C), and broader supply voltage support (3V to 5.5V).

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (Preferred for Existing Designs): LM89-1CIMMX/NOPB is the recommended direct substitute. It maintains identical electrical specifications and pinout compatibility while offering Active product status and ROHS3 compliance. This part is suitable for designs currently using the obsolete LM89-1CIMMX without circuit modifications.

Extended Range Substitution (For New Designs): The SA56004 series (SA56004ADP,118; SA56004CDP,118; SA56004EDP,118) provides functional substitution with enhanced capabilities. These parts extend the operating temperature range to -40°C to 125°C, improve accuracy to ±2°C (±3°C), and support broader supply voltage (3V to 5.5V). All three variants maintain 8-TSSOP package compatibility and I2C/SMBus interface support. Selection among SA56004 variants depends on packaging requirements: Tape & Reel (TR) for SA56004ADP,118 and SA56004CDP,118, or Cut Tape (CT) & Digi-Reel® for SA56004EDP,118.

All substitute options are ROHS3 compliant and carry Active product status, ensuring long-term availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can LM89-1CIMMX/NOPB be used as a direct replacement for LM89-1CIMMX? A: Yes. LM89-1CIMMX/NOPB is electrically and mechanically identical to LM89-1CIMMX. The primary differences are product status (Active vs. Obsolete) and RoHS compliance (ROHS3 vs. non-compliant). No circuit modifications are required.

Q: What are the key differences between LM89-1CIMMX and SA56004 series substitutes? A: SA56004 parts extend the temperature sensing range from 0°C–85°C to -40°C–125°C, improve accuracy from ±3°C to ±2°C (±3°C), and support higher supply voltage up to 5.5V. Both maintain SMBus/I2C compatibility and 8-TSSOP packaging. SA56004 parts are suitable for applications requiring wider temperature coverage or improved accuracy.

Q: Are the SA56004ADP,118, SA56004CDP,118, and SA56004EDP,118 electrically identical? A: Yes, all three SA56004 variants are electrically identical. The differences are in packaging format: SA56004ADP,118 and SA56004CDP,118 are supplied in Tape & Reel (TR), while SA56004EDP,118 is supplied in Cut Tape (CT) & Digi-Reel®. Select based on your procurement and assembly requirements.

Q: Is the 8-TSSOP package compatible with the original 8-VSSOP package? A: Both packages are 8-pin surface mount with 0.118" width and 3.00mm body dimensions. Pin configuration and spacing are compatible, allowing direct PCB substitution without layout modifications.

Q: What is the impact of moving from 7-bit local resolution to 10-bit resolution? A: SA56004 parts provide 10-bit resolution for both local and remote sensing, compared to 7-bit local and 10-bit remote on LM89-1CIMMX. This improves local temperature measurement precision. The change is backward compatible in SMBus/I2C communication protocols.

Q: Are all substitute parts RoHS compliant? A: LM89-1CIMMX/NOPB and all SA56004 variants are ROHS3 compliant. The original LM89-1CIMMX is RoHS non-compliant. For new designs and regulated applications, use compliant alternatives.