MCP9801-M/MSG Equivalent & Substitute Parts

Part Overview

The MCP9801-M/MSG is a digital temperature sensor manufactured by Microchip Technology, designed for local temperature measurement across the -55°C to 125°C range with 11-bit resolution and I2C/SMBus interface compatibility. This component is currently classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional and electrical compatibility for new designs and production continuity.

Key Parameters

Parameter	MCP9801-M/MSG
Sensor Type	Digital, Local
Sensing Temperature Range	-55°C ~ 125°C
Output Interface	I2C/SMBus
Supply Voltage	2.7V ~ 5.5V
Resolution	11 bits
Accuracy (Best Case)	±1°C
Package	8-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following electrical and mechanical parameters:

Sensor Type: Digital, Local temperature measurement
Temperature Range: -55°C to 125°C operating capability
Interface: I2C/SMBus protocol compatibility
Resolution: 11-bit minimum
Package: 8-MSOP or 8-TSSOP/MSOP compatible footprint
Supply Voltage: Minimum 2.7V operation capability
RoHS3 Compliance: Required for regulatory alignment

All substitute parts listed below meet these core criteria and are classified as active products with current manufacturing status.

Parameter Comparison

Part Number	Manufacturer	Status	Supply Voltage	Accuracy (Best)	Package	Packaging Type	Inventory
MCP9801-M/MSG	Microchip Technology	Obsolete	2.7V ~ 5.5V	±1°C	8-MSOP	—	672 Pcs
AT30TS74-XM8M-B	Microchip Technology	Active	1.7V ~ 5.5V	±2°C	8-TSSOP/MSOP	Bulk	3695 Pcs
AT30TS74-XM8M-T	Microchip Technology	Active	1.7V ~ 5.5V	±2°C	8-TSSOP/MSOP	Cut Tape & Digi-Reel	33100 Pcs
AT30TS750A-XM8M-B	Microchip Technology	Active	1.7V ~ 5.5V	±1°C	8-TSSOP/MSOP	Tube	1381 Pcs
AT30TS750A-XM8M-T	Microchip Technology	Active	1.7V ~ 5.5V	±1°C	8-TSSOP/MSOP	Tape & Reel	7323 Pcs
AT30TS75A-XM8M-T	Microchip Technology	Active	1.7V ~ 5.5V	±1°C	8-TSSOP/MSOP	Tape & Reel	18220 Pcs
AT30TSE752A-XM8M-B	Microchip Technology	Active	1.7V ~ 5.5V	±1°C	8-TSSOP/MSOP	Tube	2000 Pcs
AT30TSE754A-XM8M-B	Microchip Technology	Active	1.7V ~ 5.5V	±1°C	8-TSSOP/MSOP	Tube	732 Pcs
AT30TSE754A-XM8M-T	Microchip Technology	Active	1.7V ~ 5.5V	±1°C	8-TSSOP/MSOP	Tape & Reel	5831 Pcs
AT30TSE758A-XM8M-T	Microchip Technology	Active	1.7V ~ 5.5V	±1°C	8-TSSOP/MSOP	Tape & Reel	2030 Pcs
STDS75DS2F	STMicroelectronics	Active	2.7V ~ 5.5V	±2°C	8-MSOP	Cut Tape & Digi-Reel	16768 Pcs

Engineering Selection Recommendations

All substitute parts listed maintain ROHS3 compliance and REACH unaffected status, consistent with the original MCP9801-M/MSG component. Selection between alternatives depends on specific application requirements:

Microchip Technology AT30 Series (AT30TS74, AT30TS750A, AT30TS75A, AT30TSE752A, AT30TSE754A, AT30TSE758A): These parts are direct functional equivalents with active product status. The AT30 series offers improved supply voltage range (1.7V minimum versus 2.7V), enabling operation in lower-voltage applications. Accuracy specifications vary between ±1°C and ±2°C depending on the specific variant. Packaging options include Bulk, Cut Tape & Digi-Reel, Tube, and Tape & Reel formats to accommodate different procurement and assembly workflows.

STMicroelectronics STDS75DS2F: This alternative maintains the original 2.7V minimum supply voltage specification and provides ±2°C accuracy. The 8-MSOP package matches the original footprint precisely. This option is suitable for designs requiring strict voltage compatibility with the MCP9801-M/MSG.

Product status is active for all substitute options, ensuring long-term availability and manufacturing continuity.

Frequently Asked Questions (FAQ)

Q: Can AT30 series parts directly replace MCP9801-M/MSG in existing designs?

A: Yes, all AT30 series parts maintain I2C/SMBus interface compatibility, 11-bit resolution, and -55°C to 125°C operating range. The 8-TSSOP/MSOP package is footprint-compatible with the original 8-MSOP. Verify supply voltage requirements; AT30 parts operate at 1.7V minimum, providing additional design flexibility.

Q: What is the difference between AT30TS74 and AT30TS750A variants?

A: Both maintain identical electrical specifications and package compatibility. The primary distinction is accuracy: AT30TS74 provides ±2°C accuracy, while AT30TS750A delivers ±1°C accuracy, matching the original MCP9801-M/MSG specification. Selection depends on application tolerance requirements.

Q: Is STDS75DS2F suitable for low-voltage applications?

A: No. STDS75DS2F requires 2.7V minimum supply voltage, identical to the original MCP9801-M/MSG. For applications requiring operation below 2.7V, AT30 series alternatives with 1.7V minimum specification are required.

Q: What packaging options are available for production quantities?

A: Tape & Reel (TR) and Cut Tape & Digi-Reel formats are optimized for automated assembly. Tube and Bulk packaging are available for lower-volume or manual assembly processes. AT30TS74-XM8M-T and AT30TS75A-XM8M-T offer the highest inventory levels in Tape & Reel format.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed alternatives maintain ROHS3 compliance and REACH unaffected status, consistent with regulatory requirements for the original component.

Q: Does supply voltage range affect I2C/SMBus communication?

A: No. All substitute parts maintain full I2C/SMBus protocol compatibility across their respective supply voltage ranges. The extended lower voltage capability of AT30 series (1.7V) does not impact communication protocol performance.

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