AT30TSE754-SS8-B Equivalent & Substitute Parts

Part Overview

The AT30TSE754-SS8-B 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 supply voltage of 2.7V to 5.5V and is housed in an 8-SOIC surface mount package.

The AT30TSE754-SS8-B is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this temperature sensing solution.

Key Parameters

Parameter	Value
Manufacturer Part Number	AT30TSE754-SS8-B
Manufacturer	Microchip Technology
Sensor Type	Digital, Local
Sensing Temperature Range	-55°C ~ 125°C
Output Type	I2C/SMBus
Supply Voltage	2.7V ~ 5.5V
Resolution	11 bits
Accuracy (Best/Worst)	±1.5°C / ±3°C
Package Type	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the AT30TSE754-SS8-B are selected based on the following critical parameters that determine functional compatibility:

Sensor Type: Digital, Local temperature measurement
Temperature Range: -55°C to 125°C operating capability
Output Interface: I2C/SMBus protocol compatibility
Supply Voltage: 2.7V to 5.5V operation
Package: 8-SOIC surface mount form factor
Resolution: 11-bit or higher resolution capability
Accuracy: ±1.5°C or better at nominal conditions

Substitute parts are grouped into two categories:

Direct Microchip Technology Substitutes (AT30TSE754A-SS8M-B, MCP9801-M/SN, MCP9801T-M/SN, MCP9803-M/SN, MCP9803T-M/SN): These parts maintain identical or superior electrical specifications with active product status and improved supply voltage range (1.7V minimum for AT30TSE754A-SS8M-B).

Cross-Manufacturer Substitutes (ADT75ARZ, ADT75ARZ-REEL, ADT75ARZ-REEL7, DS1621S+, DS1621S+T&R): These Analog Devices Inc. and Maxim Integrated parts meet the core functional requirements with 12-bit or 9-bit resolution, maintaining the same temperature range, I2C interface, and 8-SOIC packaging.

Parameter Comparison

Part Number	Manufacturer	Product Status	Temperature Range	Output Type	Supply Voltage	Resolution	Accuracy (Best/Worst)	Package
AT30TSE754-SS8-B	Microchip Technology	Obsolete	-55°C ~ 125°C	I2C/SMBus	2.7V ~ 5.5V	11 b	±1.5°C / ±3°C	8-SOIC
AT30TSE754A-SS8M-B	Microchip Technology	Active	-55°C ~ 125°C	I2C/SMBus	1.7V ~ 5.5V	11 b	±1°C / ±3°C	8-SOIC
MCP9801-M/SN	Microchip Technology	Active	-55°C ~ 125°C	I2C/SMBus	2.7V ~ 5.5V	11 b	±1°C / ±3°C	8-SOIC
MCP9801T-M/SN	Microchip Technology	Active	-55°C ~ 125°C	I2C/SMBus	2.7V ~ 5.5V	11 b	±1°C / ±3°C	8-SOIC
MCP9803-M/SN	Microchip Technology	Active	-55°C ~ 125°C	I2C/SMBus	2.7V ~ 5.5V	11 b	±1°C / ±3°C	8-SOIC
MCP9803T-M/SN	Microchip Technology	Active	-55°C ~ 125°C	I2C/SMBus	2.7V ~ 5.5V	11 b	±1°C / ±3°C	8-SOIC
ADT75ARZ	Analog Devices Inc.	Active	-55°C ~ 125°C	I2C/SMBus	2.7V ~ 5.5V	12 b	±2°C / ±3°C	8-SOIC
ADT75ARZ-REEL	Analog Devices Inc.	Active	-55°C ~ 125°C	I2C/SMBus	2.7V ~ 5.5V	12 b	±2°C / ±3°C	8-SOIC
ADT75ARZ-REEL7	Analog Devices Inc.	Active	-55°C ~ 125°C	I2C/SMBus	2.7V ~ 5.5V	12 b	±2°C / ±3°C	8-SOIC
DS1621S+	Analog Devices Inc./Maxim Integrated	Active	-55°C ~ 125°C	I2C	2.7V ~ 5.5V	9 b	±0.5°C / ±2°C	8-SOIC
DS1621S+T&R	Analog Devices Inc./Maxim Integrated	Active	-55°C ~ 125°C	I2C	2.7V ~ 5.5V	9 b	±0.5°C / ±2°C	8-SOIC

Engineering Selection Recommendations

Primary Recommendation: AT30TSE754A-SS8M-B or MCP9801-M/SN / MCP9801T-M/SN

The AT30TSE754A-SS8M-B is the direct successor to the AT30TSE754-SS8-B, maintaining 11-bit resolution with improved accuracy (±1°C best case) and extended lower supply voltage support (1.7V minimum). This part carries active product status and ROHS3 compliance. The MCP9801 series (MCP9801-M/SN and MCP9801T-M/SN) offers identical electrical specifications with active status and full compliance certifications. Packaging options include Tube (MCP9801-M/SN) and Cut Tape with Digi-Reel (MCP9801T-M/SN).

Secondary Recommendation: MCP9803-M/SN / MCP9803T-M/SN

The MCP9803 series provides equivalent performance to the MCP9801 series with identical specifications. Packaging variants include Tube (MCP9803-M/SN) and Cut Tape with Digi-Reel (MCP9803T-M/SN). Both maintain active product status and full compliance.

Alternative Recommendation: ADT75ARZ Series

The ADT75ARZ family (ADT75ARZ, ADT75ARZ-REEL, ADT75ARZ-REEL7) from Analog Devices Inc. offers 12-bit resolution with the same temperature range and I2C/SMBus interface. These parts maintain active product status and ROHS3 compliance. The higher resolution provides enhanced measurement precision, though accuracy specification is ±2°C at best case. Multiple packaging options are available.

Cross-Manufacturer Alternative: DS1621S+ Series

The DS1621S+ and DS1621S+T&R from Analog Devices Inc./Maxim Integrated provide I2C interface compatibility with 9-bit resolution. These parts deliver superior accuracy (±0.5°C best case) and maintain active product status with full compliance certifications. Packaging options include Tube (DS1621S+) and Cut Tape with Digi-Reel (DS1621S+T&R).

All recommended substitutes maintain ROHS3 compliance, MSL Level 1 (Unlimited), REACH Unaffected status, and EAR99 ECCN classification consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can I directly replace AT30TSE754-SS8-B with AT30TSE754A-SS8M-B?

A: Yes. The AT30TSE754A-SS8M-B is the active successor with identical 11-bit resolution, -55°C to 125°C temperature range, and I2C/SMBus interface. It maintains the same 8-SOIC package footprint and pinout. The improved accuracy (±1°C vs ±1.5°C) and extended lower supply voltage (1.7V vs 2.7V minimum) make it a direct functional replacement.

Q: What is the difference between MCP9801 and MCP9803 series?

A: Both MCP9801 and MCP9803 series provide identical electrical specifications: 11-bit resolution, -55°C to 125°C range, ±1°C accuracy, and I2C/SMBus interface in 8-SOIC packaging. The primary difference is packaging format: MCP9801-M/SN and MCP9803-M/SN are supplied in Tube, while MCP9801T-M/SN and MCP9803T-M/SN are supplied in Cut Tape with Digi-Reel. Selection depends on assembly process requirements.

Q: Why would I choose ADT75ARZ over Microchip alternatives?

A: The ADT75ARZ series offers 12-bit resolution compared to the 11-bit resolution of Microchip parts, providing finer measurement granularity. It maintains the same -55°C to 125°C operating range, I2C/SMBus interface, and 8-SOIC package. ADT75ARZ variants differ only in packaging: ADT75ARZ (Tube), ADT75ARZ-REEL (Cut Tape with Digi-Reel), and ADT75ARZ-REEL7 (Cut Tape with Digi-Reel). Selection is based on assembly process compatibility.

Q: Is DS1621S+ compatible with AT30TSE754-SS8-B?

A: The DS1621S+ maintains I2C interface compatibility, -55°C to 125°C temperature range, and 8-SOIC packaging. However, it operates at 9-bit resolution versus the original 11-bit specification. The DS1621S+ delivers superior accuracy (±0.5°C best case) but lower resolution. Compatibility depends on application requirements for measurement precision versus resolution trade-offs. Both DS1621S+ (Tube) and DS1621S+T&R (Cut Tape with Digi-Reel) are available.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), REACH Unaffected status, and EAR99 ECCN classification, matching the environmental and regulatory compliance profile of the original AT30TSE754-SS8-B.

Q: What packaging options are available for substitutes?

A: Microchip MCP9801 and MCP9803 series are available in Tube (standard) and Cut Tape with Digi-Reel formats. Analog Devices ADT75ARZ series offers Tube and Cut Tape with Digi-Reel variants. Maxim Integrated DS1621S+ is available in Tube and Cut Tape with Digi-Reel formats. Selection depends on your assembly process and tape-and-reel handling capabilities.

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