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LM70CIMM-5 Temperature Sensor Equivalent & Substitute Parts
Part Overview
The LM70CIMM-5 is a digital temperature sensor manufactured by Texas Instruments, designed for local temperature measurement across a range of -55°C to 150°C with 10-bit resolution and SPI output interface. The device operates on a supply voltage of 2.65V to 5.5V and features a shutdown mode for power management. This part carries a "Not For New Designs" status, indicating it is no longer recommended for new product development. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support legacy system maintenance.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Sensor Type | Digital, Local |
| Sensing Temperature Range | -55°C ~ 150°C |
| Output Type | SPI |
| Supply Voltage | 2.65V ~ 5.5V |
| Resolution | 10 bits |
| Accuracy | 1.5°C (±2°C to ±3°C across test conditions) |
| Features | Shutdown Mode |
| Mounting Type | Surface Mount |
| Package | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
| Operating Temperature | -55°C ~ 150°C |
Substitute Part Grouping Explanation
Substitute parts for the LM70CIMM-5 are identified based on strict electrical and mechanical parameter matching. The primary substitution criterion is functional equivalence across the following parameters: sensor type (digital, local), temperature sensing range (-55°C to 150°C), output interface (SPI), supply voltage tolerance (2.65V to 5.5V), resolution (10-bit), accuracy specification (1.5°C), and physical package format (8-TSSOP/8-MSOP). Parts meeting all these criteria are classified as direct substitutes. Packaging format (tape and reel versus bulk) does not affect electrical or functional compatibility and is considered a logistics variable rather than a substitution barrier.
Parameter Comparison
| Parameter | LM70CIMM-5 | LM70CIMM-5/NOPB |
|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments |
| Sensor Type | Digital, Local | Digital, Local |
| Sensing Temperature Range | -55°C ~ 150°C | -55°C ~ 150°C |
| Output Type | SPI | SPI |
| Supply Voltage | 2.65V ~ 5.5V | 2.65V ~ 5.5V |
| Resolution | 10 bits | 10 bits |
| Accuracy | 1.5°C (±2°C to ±3°C) | 1.5°C (±2°C to ±3°C) |
| Features | Shutdown Mode | Shutdown Mode |
| Mounting Type | Surface Mount | Surface Mount |
| Package | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
| Operating Temperature | -55°C ~ 150°C | -55°C ~ 150°C |
| Packaging Format | Bulk | Tape & Reel (TR) |
| Product Status | Not For New Designs | Obsolete |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
| REACH Status | REACH Affected | REACH Unaffected |
Engineering Selection Recommendations
The LM70CIMM-5/NOPB is a direct functional substitute for the LM70CIMM-5, with identical electrical specifications and package dimensions. The primary distinction is packaging format: the LM70CIMM-5/NOPB is supplied in tape and reel format, suitable for automated assembly processes, while the LM70CIMM-5 is supplied in bulk format.
From a compliance perspective, the LM70CIMM-5/NOPB offers improved regulatory status. It is ROHS3 compliant and REACH unaffected, whereas the original LM70CIMM-5 is RoHS non-compliant and REACH affected. For applications subject to environmental or regulatory requirements, the LM70CIMM-5/NOPB is the preferred selection.
Both parts carry end-of-life status (Not For New Designs and Obsolete, respectively), indicating that neither should be selected for new product development. For new designs, alternative temperature sensor solutions with active product status should be evaluated.
Frequently Asked Questions (FAQ)
Q: Can LM70CIMM-5/NOPB replace LM70CIMM-5 in existing designs?
A: Yes. Both parts are electrically and functionally identical across all specified parameters: temperature range, resolution, accuracy, output interface, and supply voltage. The only difference is packaging format (tape and reel versus bulk). Pinout and electrical behavior are identical.
Q: What is the difference between the two packaging formats?
A: LM70CIMM-5 is supplied in bulk packaging, suitable for manual handling and small-volume assembly. LM70CIMM-5/NOPB is supplied in tape and reel format, optimized for automated pick-and-place assembly equipment. Both formats contain the same component with identical electrical specifications.
Q: Why does the RoHS status differ between the two parts?
A: The LM70CIMM-5/NOPB carries the "/NOPB" suffix, indicating it is manufactured without lead (Pb) and meets ROHS3 compliance standards. The original LM70CIMM-5 does not carry this designation and is RoHS non-compliant. For applications in regions with RoHS requirements, the LM70CIMM-5/NOPB is the appropriate selection.
Q: Are there any functional differences in temperature measurement accuracy?
A: No. Both parts deliver identical accuracy specifications of 1.5°C across the full operating range of -55°C to 150°C, with the same test conditions and resolution.
Q: Should I use these parts for new product designs?
A: No. Both parts carry end-of-life status and are not recommended for new designs. For new applications, alternative temperature sensor solutions with active product status should be evaluated to ensure long-term supply availability and support.
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