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LM89-1DIMM/NOPB Equivalent & Substitute Parts
Part Overview
The LM89-1DIMM/NOPB is a digital temperature sensor manufactured by Texas Instruments, designed for local and remote temperature monitoring applications. This component operates across a 0°C to 85°C sensing range with dual-resolution output (7-bit local, 10-bit remote) via SMBus interface. The part is classified as obsolete, making identification of active equivalent components essential for ongoing design support and procurement continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Category | Temperature Sensors |
| Sensor Type | Digital, Local/Remote |
| Sensing Temperature Range | 0°C ~ 85°C (Local & Remote) |
| Output Type | SMBus |
| Supply Voltage | 3V ~ 3.6V |
| Resolution | 7 b (Local), 10 b (Remote) |
| Accuracy | ±3°C |
| Operating Temperature | 0°C ~ 125°C |
| Package Type | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the LM89-1DIMM/NOPB is determined by strict equivalence across the following critical parameters:
- Sensor type classification (Digital, Local/Remote)
- Sensing temperature range (0°C ~ 85°C for both local and remote channels)
- Output interface protocol (SMBus)
- Supply voltage specification (3V ~ 3.6V)
- Resolution characteristics (7-bit local, 10-bit remote)
- Accuracy tolerance (±3°C)
- Operating temperature envelope (0°C ~ 125°C)
- Physical package dimensions (8-TSSOP, 8-MSOP, 0.118" width, 3.00mm)
- Surface mount configuration
- Regulatory compliance (ROHS3, REACH Unaffected)
The LM89-1DIMMX/NOPB meets all specified parameters and represents the active production equivalent.
Parameter Comparison
| Parameter | LM89-1DIMM/NOPB | LM89-1DIMMX/NOPB |
|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments |
| Sensor Type | Digital, Local/Remote | Digital, Local/Remote |
| Sensing Temperature - Local | 0°C ~ 85°C | 0°C ~ 85°C |
| Sensing Temperature - Remote | 0°C ~ 85°C | 0°C ~ 85°C |
| Output Type | SMBus | SMBus |
| Supply Voltage | 3V ~ 3.6V | 3V ~ 3.6V |
| Resolution | 7 b (Local), 10 b (Remote) | 7 b (Local), 10 b (Remote) |
| Accuracy | ±3°C | ±3°C |
| Operating Temperature | 0°C ~ 125°C | 0°C ~ 125°C |
| Package / Case | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
| Mounting Type | Surface Mount | Surface Mount |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) | 1 (Unlimited) |
| REACH Status | REACH Unaffected | REACH Unaffected |
| Product Status | Obsolete | Active |
Engineering Selection Recommendations
The LM89-1DIMMX/NOPB is the direct active equivalent for the obsolete LM89-1DIMM/NOPB. Both components share identical electrical specifications, package dimensions, and regulatory compliance certifications. The primary distinction is product lifecycle status: the original part is obsolete while the substitute maintains active production status.
Selection of LM89-1DIMMX/NOPB ensures continued access to functionally equivalent components with ROHS3 compliance and REACH unaffected status. The substitute is available in Tape & Reel packaging, supporting both prototype and production volume requirements.
Frequently Asked Questions (FAQ)
Q: Are LM89-1DIMM/NOPB and LM89-1DIMMX/NOPB electrically interchangeable?
A: Yes. Both components provide identical sensor functionality, output protocol, resolution, accuracy, and operating specifications. No circuit modifications are required for substitution.
Q: What is the difference between these part numbers?
A: The primary difference is packaging format and product lifecycle status. LM89-1DIMM/NOPB is obsolete; LM89-1DIMMX/NOPB is the active production equivalent supplied in Tape & Reel format.
Q: Can I use LM89-1DIMMX/NOPB in existing designs specified for LM89-1DIMM/NOPB?
A: Yes. The substitute maintains identical pinout, package dimensions (8-TSSOP, 8-MSOP, 0.118" width, 3.00mm), and electrical characteristics. Direct PCB compatibility is confirmed.
Q: Are both parts RoHS compliant?
A: Yes. Both LM89-1DIMM/NOPB and LM89-1DIMMX/NOPB are ROHS3 compliant with MSL rating of 1 (Unlimited).
Q: What SMBus features are supported?
A: Both components support One-Shot operation, Output Switch, Programmable Limit, and Shutdown Mode functionality via SMBus interface.
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