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AT30TS75-XM8-B Equivalent & Substitute Parts
Part Overview
The AT30TS75-XM8-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 interface. The device operates on supply voltages from 2.7V to 5.5V and is packaged in an 8-TSSOP/MSOP form factor. This part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring similar functionality.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | AT30TS75-XM8-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 |
| Operating Temperature | -55°C ~ 125°C |
| Package Type | 8-TSSOP/MSOP |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the AT30TS75-XM8-B is determined by the following critical parameters:
Primary Compatibility Criteria:
- Sensing temperature range: -55°C ~ 125°C (full range match required)
- Output interface: I2C/SMBus protocol compatibility
- Supply voltage range: Minimum 2.7V support required
- Resolution: 11-bit preferred; 9-bit acceptable with functional equivalence
- Package type: 8-TSSOP/MSOP or compatible pinout
- Mounting type: Surface mount
Substitution Categories:
Direct Microchip Equivalents: Parts from Microchip Technology maintaining identical electrical specifications and packaging.
Cross-Manufacturer Alternatives: Parts from NXP USA Inc., Texas Instruments, and Analog Devices Inc./Maxim Integrated that meet the core functional requirements while maintaining I2C interface compatibility and temperature range specifications.
Resolution Variance: Substitute parts with 9-bit resolution are functionally equivalent for applications where 11-bit precision is not mandatory, provided all other parameters align.
Parameter Comparison
| Part Number | Manufacturer | Sensor Type | Temperature Range | Output Type | Supply Voltage | Resolution | Accuracy (Best/Worst) | Package | Status |
|---|---|---|---|---|---|---|---|---|---|
| AT30TS75-XM8-B | Microchip Technology | Digital, Local | -55°C ~ 125°C | I2C/SMBus | 2.7V ~ 5.5V | 11 b | ±1.5°C / ±3°C | 8-TSSOP/MSOP | Obsolete |
| AT30TS74-XM8M-B | Microchip Technology | Digital, Local | -55°C ~ 125°C | I2C/SMBus | 1.7V ~ 5.5V | 11 b | ±2°C / ±3°C | 8-TSSOP/MSOP | Active |
| AT30TS75A-XM8M-B | Microchip Technology | Digital, Local | -55°C ~ 125°C | I2C/SMBus | 1.7V ~ 5.5V | 11 b | ±1°C / ±3°C | 8-TSSOP/MSOP | Active |
| LM75ADP,118 | NXP USA Inc. | Digital, Local | -55°C ~ 125°C | I2C | 2.8V ~ 5.5V | 11 b | ±2°C / ±3°C | 8-TSSOP | Active |
| LM75AIMM/NOPB | Texas Instruments | Digital, Local | -55°C ~ 125°C | I2C | 2.7V ~ 5.5V | 9 b | ±2°C / ±3°C | 8-VSSOP | Obsolete |
| LM75AIMME/NOPB | Texas Instruments | Digital, Local | -55°C ~ 125°C | I2C | 2.7V ~ 5.5V | 9 b | ±2°C / ±3°C | 8-VSSOP | Obsolete |
| LM75AIMMX/NOPB | Texas Instruments | Digital, Local | -55°C ~ 125°C | I2C | 2.7V ~ 5.5V | 9 b | ±2°C / ±3°C | 8-VSSOP | Active |
| LM75BDP,118 | NXP USA Inc. | Digital, Local | -55°C ~ 125°C | I2C | 2.8V ~ 5.5V | 11 b | ±2°C / ±3°C | 8-TSSOP | Active |
| LM75BIMM-3+ | Analog Devices Inc./Maxim Integrated | Digital, Local | -55°C ~ 125°C | I2C | 3V ~ 5.5V | 9 b | ±2°C / ±3°C | 8-uMAX/uSOP | Active |
| LM75BIMM-3/NOPB | Texas Instruments | Digital, Local | -55°C ~ 125°C | I2C | 3V ~ 5.5V | 9 b | ±2°C / ±3°C | 8-VSSOP | Obsolete |
| LM75BIMM-5+ | Analog Devices Inc./Maxim Integrated | Digital, Local | -55°C ~ 125°C | I2C | 3V ~ 5.5V | 9 b | ±2°C / ±3°C | 8-uMAX/uSOP | Active |
Engineering Selection Recommendations
Tier 1 - Preferred Substitutes (Active Status, Microchip Technology):
AT30TS75A-XM8M-B and AT30TS74-XM8M-B are the primary recommendations. Both are active products from the original manufacturer, maintain identical package specifications, and preserve I2C/SMBus interface compatibility. AT30TS75A-XM8M-B offers superior accuracy (±1°C best case) and lower minimum supply voltage (1.7V). Both are ROHS3 compliant and REACH unaffected.
Tier 2 - Active Cross-Manufacturer Alternatives:
LM75BDP,118 (NXP USA Inc.) and LM75AIMMX/NOPB (Texas Instruments) are active products meeting full temperature range and I2C interface requirements. LM75BDP,118 maintains 11-bit resolution matching the original specification. Both are ROHS3 compliant. Package differences (8-TSSOP vs. 8-VSSOP) require PCB layout verification.
Tier 3 - Functional Equivalents with Resolution Trade-off:
LM75BIMM-5+ and LM75BIMM-3+ (Analog Devices Inc./Maxim Integrated) provide active product status with 9-bit resolution. These are suitable for applications where reduced resolution is acceptable. Minimum supply voltage is 3V, which may limit compatibility in 2.7V systems.
Obsolete Status Consideration:
LM75AIMM/NOPB, LM75AIMME/NOPB, and LM75BIMM-3/NOPB are obsolete products. While functionally equivalent, these should be avoided for new designs and long-term supply chain planning.
Frequently Asked Questions (FAQ)
Q: Can AT30TS74-XM8M-B directly replace AT30TS75-XM8-B?
A: Yes. Both are Microchip Technology products with identical package specifications (8-TSSOP/MSOP), matching temperature range (-55°C ~ 125°C), and I2C/SMBus interface. AT30TS74-XM8M-B is active and maintains 11-bit resolution. The primary difference is accuracy specification (±2°C vs. ±1.5°C best case) and lower minimum supply voltage (1.7V vs. 2.7V).
Q: What is the difference between 11-bit and 9-bit resolution?
A: Resolution determines temperature measurement granularity. 11-bit resolution provides 0.0625°C per step; 9-bit provides 0.5°C per step. For applications requiring fine temperature discrimination, 11-bit parts (AT30TS75A-XM8M-B, LM75BDP,118) are preferred. For general temperature monitoring, 9-bit alternatives are functionally equivalent.
Q: Are package differences between 8-TSSOP and 8-VSSOP significant?
A: Yes. While both are 8-pin surface mount packages with similar pinouts, physical dimensions and PCB footprints differ. 8-TSSOP (0.118" width, 3.00mm) and 8-VSSOP require different land patterns. PCB layout verification is mandatory before substitution.
Q: Can I use LM75BIMM-3+ in a 2.7V system?
A: No. LM75BIMM-3+ requires minimum 3V supply voltage. The original AT30TS75-XM8-B operates at 2.7V minimum. For 2.7V systems, use AT30TS75A-XM8M-B, LM75AIMMX/NOPB, or LM75ADP,118.
Q: Why is AT30TS75-XM8-B listed as obsolete?
A: Obsolete status indicates the manufacturer has discontinued production. Active alternatives from Microchip Technology (AT30TS75A-XM8M-B, AT30TS74-XM8M-B) provide equivalent functionality with ongoing supply availability.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original part's environmental certifications.
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