Alternatives to Texas Instruments LM45CIM3
Texas Instruments LM45CIM3 and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 LM45CIM3Texas Instruments | LMT90DBZRTexas Instruments |  MCP9700AT-E/TTMicrochip Technology | +1more | |
|---|---|---|---|---|
| FFF Compatibility | Direct physical and pinout drop-in replacement with identical SOT-23-3 packaging and Pin 1 (+VS), Pin 2 (VO), and Pin 3 (GND) configuration.Identical SOT-23-3 footprint and package dimensions.Matches the original 10 mV/°C sensitivity and has no offset at 0°C. Supply voltage range is slightly narrower at 4.5V to 10V (vs 4V to 10V) but supports the same typical application range. | Pin-compatible configuration matching SOT-23-3 Pin 1 (VDD/VS), Pin 2 (VOUT/VO), and Pin 3 (GND).Identical SOT-23-3 surface-mount footprint.Includes a 500mV offset at 0°C (VOUT = 10mV/°C * T + 500mV) to read negative temperatures without a negative supply, requiring firmware modification. Supply voltage limit is also lower at 5.5V maximum. | ||
 AI Summary | LM45CIM3 by Texas Instruments: Temperature Sensor Analog, Local -20°C ~ 100°C 10mV/°C SOT-23-3. | The LMT90DBZR is the most direct drop-in replacement for the obsolete LM45CIM3, providing pin-for-pin compatibility, identical 10mV/°C sensitivity, and a 0V offset. It improves upon the original with a wider operating temperature range and is in active production. Note that the supply voltage floor is slightly higher at 4.5V versus the original 4.0V.
| The MCP9700AT-E/TT serves as an excellent second-source alternative in the same SOT-23-3 package and pinout layout. It introduces a 500mV offset voltage at 0°C to enable negative temperature measurement on single supplies, which requires adjusting the ADC scaling in software. Additionally, it has a lower supply limit of 5.5V compared to the LM45's 10V limit.
| |
| Lifecycle Status | Obsolete | Unknown | Active | |
| Market Availability | In stock | Unknown | In stock | |
| REACH | REACH | Unknown | REACH | |
| RoHS | RoHS | Unknown | RoHS | |
| Description | Temperature Sensor Analog, Local -20°C ~ 100°C 10mV/°C SOT-23-3 | Temperature Sensor Analog, Local -20°C ~ 100°C 10mV/°C SOT-23-3 | Temperature Sensor Analog, Local -40°C ~ 125°C 10mV/°C SOT-23-3 | |
| Manufacturer | Texas Instruments | Texas Instruments | Microchip Technology | |
| Type | Temperature Sensors | Temperature Sensors | Temperature Sensors | |
| Datasheet | Open | N/A | Open | |
| Lead Time | 6 weeks | Unknown | 5 weeks | |
| Country of Origin | - | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8542.39.0090 | - | - | |
| Moisture Sensitivity Level | 1 (Unlimited) | - | - | |
| Resolution | 10mV/°C | - | - | |
| Output Type | Analog Voltage | - | - | |
| Sensor Type | Analog, Local | - | - | |
| Mounting Type | Surface Mount | - | - | |
| Package / Case | TO-236-3, SC-59, SOT-23-3 | - | - |
Unlock all 3 alternatives
- Find & compare verified second sources
- Spot risk early with real-time part monitoring
- Stay compliant and production-ready
Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 LM45CIM3/NOPBTexas Instruments | In stock | Obsolete | 4Alternatives availableSee Alternatives |
 LM78L05ACMTexas Instruments | In stock | Obsolete | 5Alternatives availableSee Alternatives |
 LM2904Monsemi | In stock | Obsolete | 3Alternatives availableSee Alternatives |
You searched one part. Parter watches your whole BOM.
All your BOM, at once
Parter maps every line to live stock, lead time, lifecycle and compliance data across the entire market — not part by part.
Hear about problems before they hit production
Allocation, EOL and last-time-buy notices surface the moment they appear, not when your buyer's PO bounces.
Qualified replacements in minutes, not days
Every at-risk line gets form-fit-function matches like the ones above — deltas flagged, evidence attached. Review, push to your BOM, and Parter starts watching the new part too.
Frequently asked questions
Yes. The Texas Instruments LM45CIM3 is marked obsolete, so the manufacturer has discontinued it and any remaining supply is limited to distributor stock. The qualified second sources on this page are active parts you can design in today.
The closest qualified second sources for the Texas Instruments LM45CIM3 are the LMT90DBZR (Texas Instruments) and the MCP9700AT-E/TT (Microchip Technology), out of 3 matched alternatives in total. Each is compared against the original on fit, form and function in the table above.
Partly. Some alternatives to the LM45CIM3 are full fit-, form- and function-compatible drop-ins, while others match on function but differ in package or a key parameter. Check the fit/form/function notes in the table and the datasheet for your application before swapping.
The LM45CIM3 (Texas Instruments) is a part in the Temperature Sensors category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
Schedule a demo
See Parter in action
Discover how Parter can help your hardware team:
- Streamline your hardware operations with AI
- Detect and prevent lifecycle disruptions
- Accelerate product development
- Stay compliant and production-ready