MCP9801-M/SNG Equivalent & Substitute Parts

Part Overview

The MCP9801-M/SNG 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 output interface. This component operates on a 2.7V to 5.5V supply and is housed in an 8-SOIC surface mount package. The part is currently classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility while offering continued availability and support.

Substiute Parts

MCP9801-M/SNG

Microchip TechnologyIn Stock: 767MCP9801-M/SNG Datasheet

Current PartRFQ

AT30TS74-SS8M-B

Microchip TechnologyIn Stock: 1400AT30TS74-SS8M-B Datasheet

MFR RecommendedRFQ

AT30TS74-SS8M-T

Microchip TechnologyIn Stock: 1237AT30TS74-SS8M-T Datasheet

MFR RecommendedRFQ

AT30TS750A-SS8M-B

Microchip TechnologyIn Stock: 1678AT30TS750A-SS8M-B Datasheet

MFR RecommendedRFQ

AT30TS75A-SS8M-T

Microchip TechnologyIn Stock: 9479AT30TS75A-SS8M-T Datasheet

MFR RecommendedRFQ

AT30TSE752A-SS8M-B

Microchip TechnologyIn Stock: 1547AT30TSE752A-SS8M-B Datasheet

MFR RecommendedRFQ

AT30TSE752A-SS8M-T

Microchip TechnologyIn Stock: 17655AT30TSE752A-SS8M-T Datasheet

MFR RecommendedRFQ

AT30TSE754A-SS8M-B

Microchip TechnologyIn Stock: 1323AT30TSE754A-SS8M-B Datasheet

MFR RecommendedRFQ

AT30TSE758A-SS8M-B

Microchip TechnologyIn Stock: 1000475AT30TSE758A-SS8M-B Datasheet

MFR RecommendedRFQ

AT30TSE758A-SS8M-T

Microchip TechnologyIn Stock: 1127AT30TSE758A-SS8M-T Datasheet

MFR RecommendedRFQ

STLM75M2F

STMicroelectronicsIn Stock: 15836STLM75M2F Datasheet

MFR RecommendedRFQ

STTS75M2F

STMicroelectronicsIn Stock: 9010STTS75M2F Datasheet

MFR RecommendedRFQ

TMP75BQDQ1

Texas InstrumentsIn Stock: 32907TMP75BQDQ1 Datasheet

MFR RecommendedRFQ

TMP75BQDRQ1

Texas InstrumentsIn Stock: 7258TMP75BQDRQ1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MCP9801-M/SNG is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Sensor type: Digital, Local
• Temperature sensing range: -55°C ~ 125°C
• Output interface: I2C/SMBus
• Package: 8-SOIC (0.154", 3.90mm Width)
• Mounting: Surface Mount
• Supply voltage compatibility: Minimum 2.7V operation

Acceptable Variation Parameters:

• Resolution: 9-bit to 11-bit (functional compatibility maintained)
• Accuracy: ±1°C to ±2°C (within acceptable tolerance bands)
• Supply voltage range: May extend beyond original specification
• Features: Substitutes may include additional functionality (EEPROM, enhanced shutdown modes)

All substitute parts listed are manufactured by Microchip Technology or STMicroelectronics and maintain active product status with current availability.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility): AT30TSE752A-SS8M-T and AT30TSE758A-SS8M-T are recommended as primary replacements. Both are active Microchip Technology products with 11-bit resolution matching the original specification, ±1°C accuracy equivalent to the MCP9801-M/SNG, and full -55°C to 125°C operating range. These parts are ROHS3 compliant and REACH unaffected, maintaining regulatory alignment with the original component.

Secondary Substitutes (Functional Equivalence): AT30TS750A-SS8M-B, AT30TS75A-SS8M-T, AT30TSE754A-SS8M-B, and AT30TSE758A-SS8M-B provide functional equivalence with identical temperature range, I2C/SMBus interface, and 11-bit resolution. These components offer ±1°C accuracy and are suitable for applications where the original MCP9801-M/SNG performance envelope is required.

Alternative Substitute (Lower Resolution): STLM75M2F from STMicroelectronics maintains the -55°C to 125°C temperature range and I2C/SMBus interface but operates at 9-bit resolution with ±2°C accuracy. This part is appropriate for applications where reduced resolution and slightly relaxed accuracy tolerances are acceptable. Supply voltage range (2.7V ~ 5.5V) matches the original specification.

Packaging Considerations: Tube packaging (-B suffix) is suitable for manual assembly and small-volume applications. Cut Tape & Digi-Reel and Tape & Reel packaging (-T suffix) are optimized for automated pick-and-place assembly and high-volume production environments.

Frequently Asked Questions (FAQ)

Q: Can AT30TS74-SS8M-B replace MCP9801-M/SNG directly? A: Yes, with one consideration. The AT30TS74 series operates at ±2°C accuracy compared to the MCP9801-M/SNG's ±1°C specification. If your application requires ±1°C accuracy, select AT30TS750A-SS8M-B, AT30TS75A-SS8M-T, or the AT30TSE series instead. All maintain identical 8-SOIC packaging and I2C/SMBus interface.

Q: What is the difference between AT30TSE752A and AT30TS75A? A: Both operate at 11-bit resolution with ±1°C accuracy across -55°C to 125°C. The AT30TSE752A includes EEPROM functionality for storing calibration data and configuration settings. Select AT30TSE752A-SS8M-T if EEPROM capability is required; otherwise, AT30TS75A-SS8M-T provides equivalent temperature sensing performance.

Q: Is STLM75M2F compatible with MCP9801-M/SNG applications? A: STLM75M2F is compatible for applications tolerating 9-bit resolution and ±2°C accuracy. The part maintains the -55°C to 125°C operating range and I2C/SMBus interface. If your design requires 11-bit resolution or ±1°C accuracy, select an AT30TS or AT30TSE variant instead.

Q: What packaging should I specify for automated assembly? A: Specify the -T suffix variant (Tape & Reel or Cut Tape & Digi-Reel packaging). AT30TSE752A-SS8M-T, AT30TS75A-SS8M-T, and AT30TSE758A-SS8M-T are optimized for automated pick-and-place equipment. For manual assembly, specify -B suffix variants (Tube packaging).

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, maintaining regulatory compliance equivalent to the original MCP9801-M/SNG specification.

Q: Can I use a lower supply voltage with substitute parts? A: AT30TS and AT30TSE series operate at 1.7V minimum supply voltage, extending below the MCP9801-M/SNG's 2.7V minimum. This provides additional design flexibility. STLM75M2F maintains the 2.7V minimum specification. Verify your circuit design operates within the selected part's supply voltage range.