SE95D,112 Temperature Sensor Equivalent & Substitute Parts

Part Overview

The SE95D,112 is a digital temperature sensor manufactured by NXP USA Inc., designed for local temperature monitoring across a -55°C to 125°C range with 13-bit resolution and I2C/SMBus output interface. The device operates on a 2.8V to 5.5V supply and features programmable limit thresholds and shutdown mode functionality in an 8-SOIC package.

This part is classified as obsolete. Equivalent substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Key Parameters

Parameter	SE95D,112
Sensor Type	Digital, Local
Sensing Temperature Range	-55°C ~ 125°C
Output Type	I2C/SMBus
Voltage Supply	2.8V ~ 5.5V
Resolution	13 bits
Accuracy	±1°C (-25°C ~ 100°C) / ±3°C (-55°C ~ 125°C)
Mounting Type	Surface Mount
Package	8-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the SE95D,112 are qualified based on the following critical parameters:

Output Interface: I2C/SMBus serial communication compatibility
Temperature Sensing Range: Minimum coverage of -40°C to 125°C (overlaps with SE95D,112 operating range)
Supply Voltage: Compatibility within standard logic supply ranges (1.7V ~ 3.6V for substitutes)
Sensor Type: Internal temperature monitoring capability
Mounting Type: Surface mount technology
Compliance: ROHS3 compliance and EAR99 classification

The MCP9844T series from Microchip Technology meets these substitution criteria. All three variants (MCP9844T-BE/MNY, MCP9844T-BE/MNYAA, MCP9844T-BE/MNYAB) share identical electrical specifications and differ only in packaging format (Cut Tape & Digi-Reel, Tape & Reel, and standard packaging respectively).

Parameter Comparison

Parameter	SE95D,112	MCP9844T-BE/MNY	MCP9844T-BE/MNYAA	MCP9844T-BE/MNYAB
Manufacturer	NXP USA Inc.	Microchip Technology	Microchip Technology	Microchip Technology
Sensor Type	Digital, Local	Internal	Internal	Internal
Sensing Temperature Range	-55°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Output Type	I2C/SMBus	2-Wire Serial, I2C	2-Wire Serial, I2C	2-Wire Serial, I2C
Voltage Supply	2.8V ~ 5.5V	1.7V ~ 3.6V	1.7V ~ 3.6V	1.7V ~ 3.6V
Resolution	13 bits	Not specified in data	Not specified in data	Not specified in data
Accuracy	±1°C to ±3°C	±3°C (Max)	±3°C (Max)	±3°C (Max)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-SOIC	8-WFDFN Exposed Pad	8-WFDFN Exposed Pad	8-WFDFN Exposed Pad
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active

Engineering Selection Recommendations

The MCP9844T-BE series represents the primary substitution path for the obsolete SE95D,112. All three variants maintain active product status with Microchip Technology, ensuring long-term availability and supply chain stability.

Packaging Variant Selection:

MCP9844T-BE/MNY: Cut Tape & Digi-Reel packaging. Suitable for high-volume automated assembly operations.
MCP9844T-BE/MNYAA: Tape & Reel packaging. Standard format for pick-and-place equipment integration.
MCP9844T-BE/MNYAB: Standard packaging format. Flexible for various procurement and assembly workflows.

All variants comply with ROHS3 regulations and carry EAR99 classification, matching the compliance profile of the original SE95D,112.

Critical Design Consideration: The MCP9844T series operates at a lower supply voltage range (1.7V ~ 3.6V) compared to the SE95D,112 (2.8V ~ 5.5V). Circuit designs must verify that the substitute part operates within the available supply voltage window. The lower temperature floor (-40°C vs. -55°C) is acceptable for most applications but must be validated against specific system requirements.

Frequently Asked Questions (FAQ)

Q: Can the MCP9844T-BE series directly replace the SE95D,112 without PCB modifications?

A: Package geometry differs between the SE95D,112 (8-SOIC) and MCP9844T-BE series (8-WFDFN). PCB footprint redesign is required. Pin-to-pin functional compatibility exists for I2C communication, but physical layout changes are mandatory.

Q: What is the difference between the three MCP9844T-BE variants?

A: MCP9844T-BE/MNY, MCP9844T-BE/MNYAA, and MCP9844T-BE/MNYAB are electrically identical. Differences exist only in packaging format and supply chain delivery method. Selection depends on procurement requirements and assembly equipment compatibility.

Q: Is the lower supply voltage range of the MCP9844T-BE a limitation?

A: The MCP9844T-BE operates on 1.7V ~ 3.6V, while the SE95D,112 operates on 2.8V ~ 5.5V. Designs using 5.5V supplies must implement voltage regulation or level shifting to accommodate the substitute part. Designs operating within the 1.7V ~ 3.6V window face no compatibility issues.

Q: Does the MCP9844T-BE support the same I2C/SMBus protocol as the SE95D,112?

A: Yes. Both devices use 2-Wire Serial I2C communication. Protocol compatibility is confirmed. Register mapping and command structures must be validated during integration testing.

Q: What is the temperature sensing range difference?

A: The SE95D,112 covers -55°C ~ 125°C, while the MCP9844T-BE covers -40°C ~ 125°C. Applications requiring operation below -40°C cannot use the MCP9844T-BE as a direct substitute.

Q: Are all three MCP9844T-BE variants in active production?

A: Yes. All three variants maintain active product status with Microchip Technology, ensuring continued availability and support.

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