LM89CIMM Temperature Sensor - Equivalent & Substitute Parts

Part Overview

The LM89CIMM 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 classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing system support.

Substiute Parts

LM89CIMM

Texas InstrumentsIn Stock: 18409LM89CIMM Datasheet

Current PartRFQ

LM89CIMM/NOPB

Texas InstrumentsIn Stock: 2182LM89CIMM/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 for the LM89CIMM is determined by the following critical parameters:

• Sensor Type: Digital, Local/Remote capability
• Output Interface: SMBus or I2C/SMBus compatibility
• Package Type: 8-VSSOP or equivalent 8-pin surface mount packages (8-TSSOP, 8-MSOP)
• Mounting Type: Surface Mount
• Supply Voltage Compatibility: Minimum 3V support required

The substitute parts identified are grouped into two categories:

1. Direct Equivalent (Pin-Compatible): LM89CIMM/NOPB - Identical electrical and mechanical specifications with improved RoHS compliance
2. Functional Equivalents (Extended Range): SA56004 series (SA56004ADP,118; SA56004CDP,118; SA56004EDP,118) - Expanded operating temperature range with enhanced accuracy and active product status

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): LM89CIMM/NOPB is the direct equivalent with identical electrical and mechanical characteristics. This part maintains the same 0°C to 85°C operating range and SMBus interface. The primary advantage is ROHS3 compliance, addressing regulatory requirements for new production.

For Extended Temperature Range Applications: The SA56004 series (SA56004ADP,118; SA56004CDP,118; SA56004EDP,118) provides expanded operating temperature coverage from -40°C to 125°C with improved accuracy (±2°C at nominal conditions). These parts are active products with ROHS3 compliance and support both I2C and SMBus protocols. The SA56004 series accommodates higher supply voltages (3V to 5.5V) compared to the LM89CIMM's 3V to 3.6V specification.

Compliance Considerations: All substitute parts listed are ROHS3 compliant and REACH unaffected, meeting current regulatory standards. The original LM89CIMM is RoHS non-compliant and obsolete, making substitution necessary for new designs requiring regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can LM89CIMM/NOPB be used as a direct drop-in replacement for LM89CIMM? A: Yes. LM89CIMM/NOPB maintains identical electrical specifications, sensing temperature range (0°C to 85°C), SMBus output, supply voltage (3V to 3.6V), and 8-VSSOP package configuration. The primary difference is improved RoHS3 compliance.

Q: What are the key differences between LM89CIMM and SA56004 series substitutes? A: The SA56004 series extends the operating temperature range to -40°C to 125°C, improves accuracy to ±2°C (±3°C), supports higher supply voltages (3V to 5.5V), and offers I2C/SMBus compatibility. These parts are active products with current manufacturing support.

Q: Are the SA56004 parts pin-compatible with LM89CIMM? A: Both use 8-pin surface mount packages (LM89CIMM uses 8-VSSOP; SA56004 uses 8-TSSOP). While physically similar, pin compatibility must be verified against specific PCB layout and firmware requirements, particularly for I2C/SMBus protocol implementation.

Q: Which substitute should be selected for new designs? A: For new designs requiring RoHS3 compliance and active product support, the SA56004 series is recommended. For applications requiring exact specification matching within the 0°C to 85°C range, LM89CIMM/NOPB is appropriate.

Q: What packaging options are available for the substitute parts? A: SA56004ADP,118 and SA56004CDP,118 are supplied in Tape & Reel (TR) format. SA56004EDP,118 is available in Cut Tape (CT) and Digi-Reel® packaging options.

Q: Are there supply voltage compatibility concerns when substituting with SA56004 series? A: The SA56004 series supports 3V to 5.5V supply voltage, which is compatible with LM89CIMM applications operating at 3V to 3.6V. No voltage adjustment is required for direct substitution in existing designs.