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TMP275AIDRG4 Equivalent & Substitute Parts
Part Overview
The TMP275AIDRG4 is a digital temperature sensor manufactured by Texas Instruments, designed for local temperature measurement across the -40°C to 125°C range with 11-bit resolution and SMBus output interface. This component operates on a 2.7V to 5.5V supply and is packaged in an 8-SOIC surface mount configuration. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | TMP275AIDRG4 |
| Manufacturer | Texas Instruments |
| Category | Temperature Sensors |
| Sensor Type | Digital, Local |
| Sensing Temperature Range | -40°C ~ 125°C |
| Output Type | SMBus |
| Supply Voltage | 2.7V ~ 5.5V |
| Resolution | 11 bits |
| Accuracy (Highest/Lowest) | ±0.5°C / ±1.5°C |
| Operating Temperature | -55°C ~ 127°C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution for the TMP275AIDRG4 is determined by the following critical parameters:
Primary Compatibility Criteria:
- Package type: 8-SOIC surface mount form factor
- Sensor type: Digital, local temperature measurement
- Output interface: SMBus or I2C/SMBus compatible
- Resolution: 11-bit minimum
- Supply voltage range: Must support 2.7V to 5.5V operation
- Temperature sensing range: Must cover -40°C to 125°C minimum
Substitution Logic: Substitute parts are grouped into two categories based on their relationship to the original specification:
-
Direct Equivalents – Parts with identical or superior electrical specifications and active product status, suitable for direct replacement without design modification.
-
Compatible Alternatives – Parts with extended temperature ranges, improved accuracy, or enhanced features that maintain functional compatibility within the 8-SOIC package while meeting or exceeding the core sensing requirements.
All substitute parts listed maintain the 8-SOIC package footprint, support SMBus or I2C/SMBus protocols, and operate within the specified voltage and temperature parameters.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Sensing Temp Range | Output Type | Supply Voltage | Resolution | Accuracy (Highest) | Operating Temp | Package | Packaging Type |
|---|---|---|---|---|---|---|---|---|---|---|
| TMP275AIDRG4 | Texas Instruments | Obsolete | -40°C ~ 125°C | SMBus | 2.7V ~ 5.5V | 11 b | ±0.5°C | -55°C ~ 127°C | 8-SOIC | Tube |
| TMP275AIDR | Texas Instruments | Active | -40°C ~ 125°C | SMBus | 2.7V ~ 5.5V | 11 b | ±0.5°C | -55°C ~ 127°C | 8-SOIC | Cut Tape & Digi-Reel |
| AT30TS74-SS8M-B | Microchip Technology | Active | -55°C ~ 125°C | I2C/SMBus | 1.7V ~ 5.5V | 11 b | ±2°C | -55°C ~ 125°C | 8-SOIC | Tube |
| AT30TS74-SS8M-T | Microchip Technology | Active | -55°C ~ 125°C | I2C/SMBus | 1.7V ~ 5.5V | 11 b | ±2°C | -55°C ~ 125°C | 8-SOIC | Cut Tape & Digi-Reel |
| AT30TS750A-SS8M-B | Microchip Technology | Active | -55°C ~ 125°C | I2C/SMBus | 1.7V ~ 5.5V | 11 b | ±1°C | -55°C ~ 125°C | 8-SOIC | Tube |
| AT30TS75A-SS8M-T | Microchip Technology | Active | -55°C ~ 125°C | I2C/SMBus | 1.7V ~ 5.5V | 11 b | ±1°C | -55°C ~ 125°C | 8-SOIC | Tape & Reel |
| AT30TSE752A-SS8M-B | Microchip Technology | Active | -55°C ~ 125°C | I2C/SMBus | 1.7V ~ 5.5V | 11 b | ±1°C | -55°C ~ 125°C | 8-SOIC | Tube |
| AT30TSE752A-SS8M-T | Microchip Technology | Active | -55°C ~ 125°C | I2C/SMBus | 1.7V ~ 5.5V | 11 b | ±1°C | -55°C ~ 125°C | 8-SOIC | Tape & Reel |
| AT30TSE754A-SS8M-B | Microchip Technology | Active | -55°C ~ 125°C | I2C/SMBus | 1.7V ~ 5.5V | 11 b | ±1°C | -55°C ~ 125°C | 8-SOIC | Tube |
| AT30TSE758A-SS8M-B | Microchip Technology | Active | -55°C ~ 125°C | I2C/SMBus | 1.7V ~ 5.5V | 11 b | ±1°C | -55°C ~ 125°C | 8-SOIC | Tube |
| AT30TSE758A-SS8M-T | Microchip Technology | Active | -55°C ~ 125°C | I2C/SMBus | 1.7V ~ 5.5V | 11 b | ±1°C | -55°C ~ 125°C | 8-SOIC | Tape & Reel |
Engineering Selection Recommendations
Primary Recommendation: TMP275AIDR
The TMP275AIDR is the direct active equivalent from Texas Instruments. It maintains identical electrical specifications to the TMP275AIDRG4 including the same sensing temperature range (-40°C to 125°C), accuracy (±0.5°C), SMBus output, and 11-bit resolution. The only difference is product status (active versus obsolete) and packaging format availability (Cut Tape & Digi-Reel versus tube). This part is the preferred choice for direct replacement without design modification.
Secondary Recommendations: Microchip AT30TS and AT30TSE Series
The Microchip AT30TS74, AT30TS75A, AT30TSE752A, AT30TSE754A, and AT30TSE758A families provide compatible alternatives with extended operating ranges and improved accuracy specifications. These parts support I2C/SMBus protocols, operate across -55°C to 125°C, and maintain the 8-SOIC package footprint. The AT30TS750A and AT30TS75A variants offer ±1°C accuracy compared to the original ±0.5°C specification. All Microchip alternatives carry active product status and ROHS3 compliance.
Compliance Considerations:
All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of the original TMP275AIDRG4. Moisture sensitivity levels vary between MSL 1 (unlimited) and MSL 3 (168 hours), which may impact storage and handling procedures depending on the selected alternative.
Frequently Asked Questions (FAQ)
Q: Can TMP275AIDR be used as a direct replacement for TMP275AIDRG4?
A: Yes. The TMP275AIDR is functionally identical to the TMP275AIDRG4 with the same electrical specifications, temperature range, accuracy, and SMBus interface. The primary difference is active product status and packaging format availability. No design changes are required.
Q: What is the main difference between TMP275AIDR and the Microchip AT30TS series?
A: The TMP275AIDR maintains the original SMBus-only interface and ±0.5°C accuracy. Microchip alternatives support I2C/SMBus dual protocols and offer ±1°C to ±2°C accuracy. All maintain 11-bit resolution and 8-SOIC packaging. The Microchip parts extend the lower operating temperature to -55°C and support lower supply voltages (1.7V minimum).
Q: Are the Microchip AT30TSE752A and AT30TS75A interchangeable?
A: Both parts share identical electrical specifications including ±1°C accuracy, I2C/SMBus interface, 11-bit resolution, and -55°C to 125°C operating range. The primary difference is packaging format: AT30TS75A is available in Tape & Reel format, while AT30TSE752A is available in both Tube and Tape & Reel formats. Selection depends on procurement and assembly requirements.
Q: What does the packaging suffix (-B or -T) indicate?
A: The suffix indicates packaging format. -B denotes Tube packaging, while -T denotes Tape & Reel (TR) or Cut Tape & Digi-Reel packaging. Both formats contain identical components; the difference is in delivery and handling method for manufacturing assembly.
Q: Can I use an AT30TS74 part with lower accuracy (±2°C) instead of the original ±0.5°C specification?
A: Substitution depends on application requirements. The AT30TS74 provides ±2°C accuracy versus the original ±0.5°C. If the application tolerates this reduced accuracy, the AT30TS74 is functionally compatible. If tighter accuracy is required, select AT30TS750A, AT30TS75A, AT30TSE752A, AT30TSE754A, or AT30TSE758A variants, which offer ±1°C accuracy.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of the original TMP275AIDRG4.
Q: What is the significance of moisture sensitivity level (MSL) differences?
A: MSL 1 (unlimited) parts have no moisture sensitivity restrictions and can be stored indefinitely. MSL 3 (168 hours) parts must be used within 168 hours of package opening or require baking before reflow soldering. Select based on your manufacturing environment and storage capabilities.
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