LM89-1DIMMX/NOPB Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments LM89-1DIMMX/NOPB is a digital temperature sensor with 2-wire SMBus interface offering ±3°C maximum accuracy in an 8-pin VSSOP package. It provides 8-bit resolution and is surface-mount compatible measuring 3×3×1.1 mm. Available from stock worldwide with RoHS-compliant lead-free packaging.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- LM89-1DIMMX/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.1500(MOQ 500)
- Temp Range
- ?°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM89-1DIMMX/NOPB?
- 2-wire SMBus serial interface for easy daisy-chaining and compatibility with system management bus controllers
- ±3°C maximum accuracy over temperature range for reliable thermal monitoring in server and embedded systems
- 8-bit resolution digital output eliminates external ADC and calibration components
- Compact 8-pin VSSOP package body 3 mm × 3 mm × 1.1 mm fits dense PCB layouts
- RoHS-compliant lead-free construction with surface-mount assembly for automated production
What is LM89-1DIMMX/NOPB used for?
The LM89-1DIMMX/NOPB is designed for system-level temperature monitoring in servers, desktop PCs, and workstations where SMBus-compatible thermal management controllers read junction and ambient temperatures to control fan speed and prevent thermal throttling. Its compact VSSOP-8 footprint makes it suitable for placement near hot components such as voltage regulators and processor sockets on dense motherboards. The part also fits industrial control panels and networking equipment requiring continuous ambient temperature logging over a 2-wire bus.
What are the specifications of LM89-1DIMMX/NOPB?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Accuracy-Max (Cel) | 3Cel |
| Body Breadth | 3mm |
| Body Height | 1.1mm |
| Body Length or Diameter | 3mm |
| Housing | PLASTIC |
| JESD-609 Code | e3 |
| Mounting Feature | SURFACE MOUNT |
| Number of Bits | 8 |
| Operating Current-Max | 1.7mA |
| Output Interface Type | 2-WIRE INTERFACE |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape/Style | SQUARE |
| Sensors/Transducers Type | TEMPERATURE SENSOR,SWITCH/DIGITAL OUTPUT,SERIAL |
| Supply Voltage-Max | 3.6V |
| Supply Voltage-Min | 3V |
| Surface Mount | YES |
| Terminal Finish | Matte Tin (Sn) |
| Termination Type | SOLDER |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the LM89-1DIMMX/NOPB datasheet?
LM89-1DIMMX/NOPB Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM89-1DIMMX/NOPB?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How accurate is LM89-1DIMMX/NOPB and what resolution does it provide for thermal monitoring?
The LM89-1DIMMX/NOPB achieves ±3°C maximum accuracy with 8-bit resolution, corresponding to a temperature step of 1°C per LSB. This accuracy level is sufficient for system thermal protection in servers and embedded systems, where ±3°C is within the hysteresis bands of most fan-control algorithms and thermal shutdown thresholds set at ±5°C margins.
What is the SMBus interface protocol used by LM89-1DIMMX/NOPB, and how many devices can share a bus?
The LM89-1DIMMX/NOPB uses 2-wire SMBus (compatible with I2C) at speeds up to 400 kHz. The device has a configurable I2C address, typically allowing 4 to 8 LM89 sensors on a single bus depending on address pin configuration. This enables monitoring multiple thermal zones — CPU, VRM, memory, and ambient — with a single SMBus controller port and only 2 signal traces.
How does the 3 mm × 3 mm VSSOP-8 package of LM89-1DIMMX/NOPB compare to a TO-92 analog sensor in board area?
The LM89-1DIMMX/NOPB VSSOP-8 footprint occupies approximately 9 mm² of PCB area, compared to roughly 30 mm² for a typical TO-92 through-hole package. Beyond area savings, the VSSOP-8 surface-mount package is compatible with automated pick-and-place assembly, reducing per-unit labour cost in volume production by eliminating manual through-hole insertion.
Can LM89-1DIMMX/NOPB measure both local and remote junction temperatures simultaneously?
The LM89 series is designed to measure both the local ambient temperature and a remote diode-connected transistor junction temperature, making it capable of monitoring a CPU or GPU die directly. The remote sensing channel can resolve temperatures with ±3°C accuracy using a 2-wire connection to the device's remote diode inputs, covering a temperature range typically spanning -40°C to 120°C for the remote junction.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 500+ | $1.3000 | $650.00 |
| 1000+ | $1.2200 | $1220.00 |
| 10000+ | $1.1500 | $11500.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“The anti-counterfeit verification gave us confidence we'd never had with other China suppliers.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit