LM95245CIM Temperature Sensor - Equivalent & Substitute Parts

Part Overview

The LM95245CIM is a digital temperature sensor manufactured by Texas Instruments, designed for local and remote temperature monitoring applications. It operates across a -40°C to 85°C sensing range with dual-resolution output (10-bit local, 12-bit remote) via SMBus interface. The device is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Substiute Parts

LM95245CIM

Texas InstrumentsIn Stock: 1384LM95245CIM Datasheet

Current PartRFQ

ADM1032ARZ-REEL

Analog Devices Inc.In Stock: 7590ADM1032ARZ-REEL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM95245CIM is determined by the following critical parameters:

Package Compatibility: Both devices must use 8-SOIC surface mount packaging to ensure PCB-level compatibility without redesign.

Communication Protocol: SMBus interface is mandatory for direct firmware and software compatibility.

Sensor Configuration: Local/remote dual-sensor capability must be maintained to preserve system functionality.

Supply Voltage Range: The substitute must operate within or encompass the 3V to 3.6V supply range of the original design.

Temperature Sensing Range: The substitute must cover the application's required temperature monitoring window. Partial overlap is acceptable if the substitute's range encompasses the critical operating band.

Resolution and Accuracy: While not identical across all candidates, these parameters define measurement precision and must be evaluated against application requirements.

The ADM1032ARZ-REEL meets these substitution criteria through matching package geometry, SMBus protocol support, dual local/remote sensing architecture, and compatible supply voltage specifications.

Parameter Comparison

Engineering Selection Recommendations

The ADM1032ARZ-REEL is an active product from Analog Devices Inc., providing long-term availability and supply chain stability compared to the obsolete LM95245CIM. Both devices share identical 8-SOIC packaging and SMBus communication protocol, enabling direct substitution at the PCB level without layout modifications.

The ADM1032ARZ-REEL demonstrates superior accuracy (±1°C versus ±2°C at best case) and operates across an extended supply voltage range (3V to 5.5V versus 3V to 3.6V). The substitute's local sensing range (0°C to 100°C) covers the primary operating band of most industrial and commercial applications, though it does not extend to the -40°C lower limit of the original device.

Selection between these devices depends on application temperature requirements. For systems requiring sub-zero temperature monitoring below 0°C, the LM95245CIM specifications cannot be matched by the ADM1032ARZ-REEL. For applications operating within 0°C to 100°C, the ADM1032ARZ-REEL provides equivalent functionality with improved accuracy and active product status.

Both devices maintain REACH compliance and EAR99 export classification. Moisture sensitivity level is identical at MSL 1 (Unlimited).

Frequently Asked Questions (FAQ)

Q: Can the ADM1032ARZ-REEL directly replace the LM95245CIM without PCB modifications?

A: Yes. Both devices use identical 8-SOIC packaging with 0.154" width and 3.90mm dimensions. Pin-to-pin compatibility and SMBus protocol alignment enable direct substitution without PCB redesign.

Q: What is the primary difference in temperature sensing range?

A: The LM95245CIM monitors -40°C to 85°C, while the ADM1032ARZ-REEL covers 0°C to 100°C for local sensing. The ADM1032ARZ-REEL's remote sensing extends to 120°C. Applications requiring sub-zero monitoring must retain the LM95245CIM or identify alternative solutions.

Q: How do accuracy specifications compare?

A: The ADM1032ARZ-REEL provides ±1°C accuracy (±3°C at extremes) versus the LM95245CIM's ±2°C accuracy (±6°C at extremes). The substitute offers superior measurement precision across its operating range.

Q: Are there supply voltage compatibility concerns?

A: The ADM1032ARZ-REEL operates across 3V to 5.5V, encompassing the LM95245CIM's 3V to 3.6V range. No voltage supply modifications are required for substitution.

Q: What is the significance of product status differences?

A: The LM95245CIM is obsolete, indicating discontinued manufacturing and limited future availability. The ADM1032ARZ-REEL is active, ensuring ongoing supply and manufacturer support for the foreseeable future.

Q: Do both devices support SMBus communication identically?

A: Both devices implement SMBus interface for temperature data output. Firmware and software compatibility is maintained across substitution, though device-specific register configurations may require review against application code.

Q: What packaging format is available for the ADM1032ARZ-REEL?

A: The ADM1032ARZ-REEL is supplied in bulk packaging, contrasting with the LM95245CIM's standard packaging designation. Verify packaging requirements for your procurement and assembly processes.