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TMP275AIDR Equivalent & Substitute Parts
Part Overview
The TMP275AIDR is a digital temperature sensor manufactured by Texas Instruments, designed for local temperature measurement across the range of -40°C to 125°C. This 8-SOIC surface mount device operates on a supply voltage of 2.7V to 5.5V and communicates via SMBus protocol with 11-bit resolution. The device is currently in active production status with 25,100 units in stock.
Substitute parts are identified when equivalent electrical and mechanical parameters are met, including matching package type (8-SOIC), resolution (11-bit), operating temperature range, and communication protocol compatibility. Alternative sources become necessary for supply chain continuity, extended temperature range requirements, or specific feature enhancements.
Substiute Parts
Key Parameters
| Parameter | TMP275AIDR Specification |
|---|---|
| Manufacturer | Texas Instruments |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Sensor Type | Digital, Local |
| Sensing Temperature - Local | -40°C ~ 125°C |
| Output Type | SMBus |
| Voltage - Supply | 2.7V ~ 5.5V |
| Resolution | 11 b |
| Accuracy - Highest (Lowest) | ±0.5°C (±1.5°C) |
| Operating Temperature | -55°C ~ 127°C |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the TMP275AIDR are qualified based on the following critical parameters:
Mechanical Compatibility: All substitute parts maintain the 8-SOIC package format with identical 0.154" (3.90mm) width, ensuring direct PCB footprint compatibility.
Electrical Compatibility: Substitute parts operate within overlapping supply voltage ranges (minimum 1.7V to 5.5V) and maintain 11-bit resolution for consistent digital output precision.
Communication Protocol: Substitute parts support SMBus or I2C/SMBus protocols, both of which are compatible with SMBus-based system architectures.
Temperature Range: Substitute parts extend the lower operating limit to -55°C, providing broader environmental coverage while maintaining the 125°C upper limit.
Surface Mount Technology: All substitutes are surface mount devices suitable for automated assembly processes.
The substitute parts are grouped into two categories based on feature set: standard temperature sensing variants (AT30TS74 series) and enhanced variants with EEPROM capability (AT30TSE752, AT30TSE754, AT30TSE758 series). DS1621S+ variants offer alternative architecture with 9-bit resolution and Analog Devices manufacturing.
Parameter Comparison
| Parameter | TMP275AIDR | AT30TS74-SS8M-B/T | AT30TS750A-SS8M-B | AT30TS75A-SS8M-T | AT30TSE752A-SS8M-B/T | AT30TSE754A-SS8M-B | AT30TSE758A-SS8M-B | DS1621S+ | DS1621S+T&R |
|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated |
| Package / Case | 8-SOIC (0.154", 3.90mm) | 8-SOIC (0.154", 3.90mm) | 8-SOIC (0.154", 3.90mm) | 8-SOIC (0.154", 3.90mm) | 8-SOIC (0.154", 3.90mm) | 8-SOIC (0.154", 3.90mm) | 8-SOIC (0.154", 3.90mm) | 8-SOIC (0.154", 3.90mm) | 8-SOIC (0.154", 3.90mm) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Sensor Type | Digital, Local | Digital, Local | Digital, Local | Digital, Local | Digital, Local | Digital, Local | Digital, Local | Digital, Local | Digital, Local |
| Sensing Temperature - Local | -40°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C |
| Output Type | SMBus | I2C/SMBus | I2C/SMBus | I2C/SMBus | I2C/SMBus | I2C/SMBus | I2C/SMBus | I2C | I2C |
| Voltage - Supply | 2.7V ~ 5.5V | 1.7V ~ 5.5V | 1.7V ~ 5.5V | 1.7V ~ 5.5V | 1.7V ~ 5.5V | 1.7V ~ 5.5V | 1.7V ~ 5.5V | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Resolution | 11 b | 11 b | 11 b | 11 b | 11 b | 11 b | 11 b | 9 b | 9 b |
| Accuracy - Highest (Lowest) | ±0.5°C (±1.5°C) | ±2°C (±3°C) | ±1°C (±3°C) | ±1°C (±3°C) | ±1°C (±3°C) | ±1°C (±3°C) | ±1°C (±3°C) | ±0.5°C (±2°C) | ±0.5°C (±2°C) |
| Operating Temperature | -55°C ~ 127°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 3 (168 Hours) | 3 (168 Hours) | 1 (Unlimited) | 1 (Unlimited) / 3 (168 Hours) | 1 (Unlimited) | 3 (168 Hours) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
Microchip AT30TS74 Series (AT30TS74-SS8M-B, AT30TS74-SS8M-T): These parts provide direct mechanical and electrical compatibility with extended lower temperature range (-55°C). Suitable for applications requiring broader environmental coverage. Packaging options include Tube and Cut Tape formats. MSL rating of 3 requires standard moisture control during storage and assembly.
Microchip AT30TS750A-SS8M-B: Offers enhanced accuracy (±1°C highest) and includes EEPROM functionality for parameter storage. Extended feature set includes programmable limits and shutdown mode. MSL rating of 3 applies standard moisture handling requirements.
Microchip AT30TS75A-SS8M-T: Provides MSL rating of 1 (Unlimited) for reduced moisture sensitivity, matching the original TMP275AIDR specification. Includes programmable resolution and shutdown mode features. Available in Tape & Reel packaging with 9,386 units in stock.
Microchip AT30TSE752A Series (AT30TSE752A-SS8M-B, AT30TSE752A-SS8M-T): Enhanced variants with EEPROM capability and programmable features. AT30TSE752A-SS8M-T maintains MSL 3 rating with highest inventory availability (17,632 units). AT30TSE752A-SS8M-B provides MSL 1 (Unlimited) rating.
Microchip AT30TSE754A-SS8M-B and AT30TSE758A-SS8M-B: Premium variants with EEPROM and full programmable feature set. AT30TSE758A-SS8M-B offers exceptional inventory depth (1,000,399 units) with MSL 3 rating.
Analog Devices DS1621S+ Series (DS1621S+, DS1621S+T&R): Alternative architecture with 9-bit resolution and I2C protocol. Maintains ±0.5°C highest accuracy matching the original part. Both variants carry MSL 1 (Unlimited) rating. DS1621S+T&R available in Cut Tape format with 4,511 units in stock.
All substitute parts maintain ROHS3 compliance and EAR99 export classification consistent with the original TMP275AIDR.
Frequently Asked Questions (FAQ)
Q: Can AT30TS74-SS8M-B directly replace TMP275AIDR in existing designs?
A: Yes, from a mechanical and electrical standpoint. The 8-SOIC package footprint is identical. Both support SMBus/I2C communication and 11-bit resolution. However, the AT30TS74 series operates on 1.7V minimum supply voltage compared to TMP275AIDR's 2.7V minimum, and accuracy specification differs (±2°C vs ±0.5°C at highest). Verify system requirements before substitution.
Q: What is the difference between AT30TSE752A and AT30TS75A?
A: AT30TSE752A includes EEPROM functionality for storing configuration parameters, while AT30TS75A does not. Both maintain 11-bit resolution and I2C/SMBus compatibility. AT30TS75A-SS8M-T offers MSL 1 (Unlimited) rating, whereas AT30TSE752A-SS8M-T carries MSL 3 (168 Hours).
Q: Why does DS1621S+ have 9-bit resolution instead of 11-bit?
A: DS1621S+ uses a different sensor architecture from Analog Devices Inc./Maxim Integrated. The 9-bit resolution provides adequate precision for most temperature monitoring applications while maintaining ±0.5°C accuracy at the highest test condition. System firmware must accommodate the reduced resolution output format.
Q: Are all substitute parts available in the same packaging options as TMP275AIDR?
A: TMP275AIDR is supplied in Cut Tape (CT) & Digi-Reel format. Substitute parts are available in multiple packaging options: Tube, Cut Tape (CT) & Digi-Reel, and Tape & Reel (TR). Select the packaging format matching your assembly process requirements.
Q: What does MSL rating mean for component substitution?
A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be exposed to ambient conditions (typically 30°C, 85% relative humidity) before requiring baking. MSL 1 (Unlimited) allows indefinite storage without moisture control. MSL 3 (168 Hours) requires baking after 168 hours of exposure. TMP275AIDR carries MSL 1; some substitutes carry MSL 3, requiring adjusted storage and assembly procedures.
Q: Can I use AT30TSE758A-SS8M-B for high-volume production?
A: Yes. AT30TSE758A-SS8M-B maintains 1,000,399 units in stock, providing substantial supply availability. It offers 11-bit resolution, I2C/SMBus compatibility, and extended feature set including EEPROM and programmable limits. MSL 3 rating requires standard moisture control during manufacturing.
Q: Is the operating temperature range difference between TMP275AIDR (-55°C to 127°C) and substitutes (-55°C to 125°C) significant?
A: The TMP275AIDR extends to 127°C while most substitutes reach 125°C. For applications requiring operation above 125°C, TMP275AIDR remains the specified choice. For standard industrial applications within -55°C to 125°C range, substitute parts are functionally equivalent.
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