TMP175AIDR Equivalent & Substitute Parts

Part Overview

The TMP175AIDR 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 supply voltages between 2.7V and 5.5V, communicating via I2C/SMBus protocol with 9-bit resolution. The device is currently in active production status with ROHS3 compliance and is suitable for applications requiring compact, low-power temperature monitoring.

Equivalent and substitute parts are identified based on matching electrical specifications, mechanical compatibility, and functional capabilities. Substitute parts must maintain compatibility with I2C/SMBus communication protocols, operate within overlapping temperature ranges, and share the same 8-SOIC package footprint to ensure direct board-level replacement without design modifications.

Key Parameters

Parameter	TMP175AIDR
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	I2C/SMBus
Voltage - Supply	2.7V ~ 5.5V
Resolution	9 b
Accuracy - Highest (Lowest)	±1.5°C (±2°C)
Operating Temperature	-55°C ~ 127°C
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the TMP175AIDR are qualified based on the following critical parameters:

Mechanical Compatibility: All substitute parts must use the 8-SOIC (0.154", 3.90mm Width) package to ensure PCB footprint compatibility without layout redesign.

Communication Protocol: All substitutes must support I2C/SMBus interface to maintain firmware and software compatibility with existing system implementations.

Temperature Range: Substitute parts must cover the operational temperature range of -40°C to 125°C. Parts with extended ranges (-55°C to 125°C) are acceptable as they provide broader operational capability.

Supply Voltage: Substitute parts must operate within or encompass the 2.7V to 5.5V supply voltage range of the original part.

Resolution and Accuracy: While the TMP175AIDR operates at 9-bit resolution with ±1.5°C accuracy, substitute parts with equal or higher resolution (11-bit) and equal or better accuracy (±1°C or better) are functionally compatible and provide enhanced performance.

Regulatory Compliance: All substitute parts must maintain ROHS3 compliance and active product status to ensure long-term availability and regulatory alignment.

Parameter Comparison

Part Number	Manufacturer	Package	Sensing Temp Range	Supply Voltage	Resolution	Accuracy (Best)	Output Type	Operating Temp	RoHS Status	Product Status
TMP175AIDR	Texas Instruments	8-SOIC	-40°C ~ 125°C	2.7V ~ 5.5V	9 b	±1.5°C	I2C/SMBus	-55°C ~ 127°C	ROHS3	Active
AT30TS74-SS8M-B	Microchip Technology	8-SOIC	-55°C ~ 125°C	1.7V ~ 5.5V	11 b	±2°C	I2C/SMBus	-55°C ~ 125°C	ROHS3	Active
AT30TS74-SS8M-T	Microchip Technology	8-SOIC	-55°C ~ 125°C	1.7V ~ 5.5V	11 b	±2°C	I2C/SMBus	-55°C ~ 125°C	ROHS3	Active
AT30TS750A-SS8M-B	Microchip Technology	8-SOIC	-55°C ~ 125°C	1.7V ~ 5.5V	11 b	±1°C	I2C/SMBus	-55°C ~ 125°C	ROHS3	Active
AT30TS75A-SS8M-T	Microchip Technology	8-SOIC	-55°C ~ 125°C	1.7V ~ 5.5V	11 b	±1°C	I2C/SMBus	-55°C ~ 125°C	ROHS3	Active
AT30TSE752A-SS8M-B	Microchip Technology	8-SOIC	-55°C ~ 125°C	1.7V ~ 5.5V	11 b	±1°C	I2C/SMBus	-55°C ~ 125°C	ROHS3	Active
AT30TSE752A-SS8M-T	Microchip Technology	8-SOIC	-55°C ~ 125°C	1.7V ~ 5.5V	11 b	±1°C	I2C/SMBus	-55°C ~ 125°C	ROHS3	Active
AT30TSE754A-SS8M-B	Microchip Technology	8-SOIC	-55°C ~ 125°C	1.7V ~ 5.5V	11 b	±1°C	I2C/SMBus	-55°C ~ 125°C	ROHS3	Active
AT30TSE758A-SS8M-B	Microchip Technology	8-SOIC	-55°C ~ 125°C	1.7V ~ 5.5V	11 b	±1°C	I2C/SMBus	-55°C ~ 125°C	ROHS3	Active
DS1631Z+	Analog Devices Inc./Maxim Integrated	8-SOIC	-55°C ~ 125°C	2.7V ~ 5.5V	11 b	±0.5°C	I2C	-55°C ~ 125°C	ROHS3	Active
DS1631Z+T&R	Analog Devices Inc./Maxim Integrated	8-SOIC	-55°C ~ 125°C	2.7V ~ 5.5V	11 b	±0.5°C	I2C	-55°C ~ 125°C	ROHS3	Active

Engineering Selection Recommendations

All listed substitute parts maintain active product status and ROHS3 compliance, ensuring regulatory alignment and long-term supply availability equivalent to the TMP175AIDR.

Microchip Technology AT30 Series (AT30TS74, AT30TS750A, AT30TS75A, AT30TSE752A, AT30TSE754A, AT30TSE758A): These parts provide 11-bit resolution with accuracy specifications ranging from ±1°C to ±2°C. The extended temperature range (-55°C to 125°C) and lower minimum supply voltage (1.7V) offer broader operational flexibility. Packaging options include Tube (B suffix), Cut Tape & Digi-Reel (T suffix), and Tape & Reel (TR suffix) to match procurement and assembly requirements.

Analog Devices Inc./Maxim Integrated DS1631Z+ Series (DS1631Z+ and DS1631Z+T&R): These parts deliver superior accuracy at ±0.5°C with 11-bit resolution. Supply voltage range (2.7V to 5.5V) aligns with the original TMP175AIDR specification. The DS1631Z+ is available in Tube packaging, while DS1631Z+T&R is supplied in Cut Tape & Digi-Reel format. Both variants maintain I2C protocol compatibility and identical thermal operating range.

Packaging Considerations: Selection between Tube, Cut Tape & Digi-Reel, and Tape & Reel packaging depends on assembly methodology and procurement volume. Tube packaging suits lower-volume manual assembly, while Cut Tape & Digi-Reel and Tape & Reel formats support automated pick-and-place operations.

Frequently Asked Questions (FAQ)

Q: Can AT30TS74-SS8M-B replace TMP175AIDR directly on the PCB?

A: Yes. Both parts use identical 8-SOIC (0.154", 3.90mm Width) packaging and I2C/SMBus communication protocol. The AT30TS74-SS8M-B provides extended temperature range (-55°C to 125°C) and higher resolution (11-bit) while maintaining functional compatibility. No PCB layout modifications are required.

Q: What is the difference between AT30TSE752A-SS8M-B and AT30TSE752A-SS8M-T?

A: Both parts are electrically identical with the same specifications. The difference is packaging format: the -B suffix indicates Tube packaging suitable for manual assembly, while the -T suffix indicates Cut Tape & Digi-Reel format optimized for automated assembly lines.

Q: Does the DS1631Z+ offer better performance than the TMP175AIDR?

A: The DS1631Z+ provides superior accuracy (±0.5°C versus ±1.5°C) and higher resolution (11-bit versus 9-bit). Both operate within the same temperature range and use I2C protocol. The DS1631Z+ is suitable for applications requiring tighter temperature measurement tolerance.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance status, ensuring regulatory alignment with environmental and hazardous substance restrictions equivalent to the TMP175AIDR.

Q: Can I use AT30TS750A-SS8M-B in a 2.7V supply voltage application?

A: No. The AT30TS750A-SS8M-B minimum supply voltage is 1.7V, but this specification does not guarantee operation at 2.7V. For applications with 2.7V supply voltage, use DS1631Z+ or DS1631Z+T&R, which specify 2.7V as the minimum operating voltage, matching the TMP175AIDR requirement.

Q: What features distinguish AT30TSE752A from AT30TS75A?

A: Both parts share identical electrical specifications and accuracy (±1°C). The AT30TSE752A and AT30TS75A differ in internal feature sets and device variants within the Microchip AT30 family. Both are functionally compatible with the TMP175AIDR for temperature sensing applications.

Q: Is inventory availability a factor in part selection?

A: Inventory levels are provided for reference. AT30TSE758A-SS8M-B shows the highest inventory (1,000,399 pcs), while other variants range from 1,000 to 17,632 pcs. Procurement decisions should consider both technical compatibility and supply chain requirements.

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