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AT30TS75-XM8-T Equivalent & Substitute Parts
Part Overview
The AT30TS75-XM8-T 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 is currently obsolete, making equivalent and substitute parts necessary for ongoing system support, maintenance, and new design implementations where this sensor specification remains applicable.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| 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 | ±1.5°C (0°C ~ 55°C), ±3°C (-20°C ~ 125°C) |
| Package Type | 8-TSSOP/8-MSOP |
| Mounting Type | Surface Mount |
| Features | One-Shot, Output Switch, Programmable Limit, Programmable Resolution, Shutdown Mode |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility is determined by strict alignment with the following electrical and mechanical parameters:
- Temperature Range Compatibility: All substitute parts must support the full -55°C to 125°C operating range
- Interface Protocol: I2C or SMBus compatibility required
- Supply Voltage: Minimum 2.7V support required; 5.5V maximum acceptable
- Resolution: 11-bit or 9-bit resolution acceptable (both provide sufficient measurement precision for this application)
- Package Compatibility: 8-pin surface mount packages (8-TSSOP, 8-MSOP, 8-VSSOP, 8-uMAX/uSOP) with 0.118" width
- Regulatory Compliance: ROHS3 compliance required
Substitute parts are grouped into three categories based on product status and availability: Active Direct Equivalents (Microchip), Active Manufacturer Recommended Alternatives (NXP, Texas Instruments, Analog Devices), and Obsolete Alternatives (legacy options with continued inventory availability).
Parameter Comparison
| Part Number | Manufacturer | Status | Temperature Range | Resolution | Supply Voltage | Accuracy | Package | Interface |
|---|---|---|---|---|---|---|---|---|
| AT30TS75-XM8-T | Microchip Technology | Obsolete | -55°C ~ 125°C | 11 b | 2.7V ~ 5.5V | ±1.5°C / ±3°C | 8-TSSOP/MSOP | I2C/SMBus |
| AT30TS74-XM8M-T | Microchip Technology | Active | -55°C ~ 125°C | 11 b | 1.7V ~ 5.5V | ±2°C / ±3°C | 8-TSSOP/MSOP | I2C/SMBus |
| AT30TS75A-XM8M-T | Microchip Technology | Active | -55°C ~ 125°C | 11 b | 1.7V ~ 5.5V | ±1°C / ±3°C | 8-TSSOP/MSOP | I2C/SMBus |
| LM75ADP,118 | NXP USA Inc. | Active | -55°C ~ 125°C | 11 b | 2.8V ~ 5.5V | ±2°C / ±3°C | 8-TSSOP | I2C |
| LM75AIMM/NOPB | Texas Instruments | Obsolete | -55°C ~ 125°C | 9 b | 2.7V ~ 5.5V | ±2°C / ±3°C | 8-VSSOP | I2C |
| LM75AIMME/NOPB | Texas Instruments | Obsolete | -55°C ~ 125°C | 9 b | 2.7V ~ 5.5V | ±2°C / ±3°C | 8-VSSOP | I2C |
| LM75AIMMX/NOPB | Texas Instruments | Active | -55°C ~ 125°C | 9 b | 2.7V ~ 5.5V | ±2°C / ±3°C | 8-VSSOP | I2C |
| LM75BDP,118 | NXP USA Inc. | Active | -55°C ~ 125°C | 11 b | 2.8V ~ 5.5V | ±2°C / ±3°C | 8-TSSOP | I2C |
| LM75BIMM-3+ | Analog Devices Inc./Maxim Integrated | Active | -55°C ~ 125°C | 9 b | 3V ~ 5.5V | ±2°C / ±3°C | 8-uMAX/uSOP | I2C |
| LM75BIMM-3/NOPB | Texas Instruments | Obsolete | -55°C ~ 125°C | 9 b | 3V ~ 5.5V | ±2°C / ±3°C | 8-VSSOP | I2C |
| LM75BIMM-5+ | Analog Devices Inc./Maxim Integrated | Active | -55°C ~ 125°C | 9 b | 3V ~ 5.5V | ±2°C / ±3°C | 8-uMAX/uSOP | I2C |
Engineering Selection Recommendations
Primary Substitutes (Active Microchip Parts)
AT30TS74-XM8M-T and AT30TS75A-XM8M-T are direct Microchip alternatives with active product status. Both maintain the same package footprint, temperature range, and I2C/SMBus interface. AT30TS75A-XM8M-T offers improved accuracy (±1°C vs ±1.5°C) and lower minimum supply voltage (1.7V vs 2.7V). Both are ROHS3 compliant with MSL-3 moisture sensitivity.
Secondary Substitutes (Active NXP Parts)
LM75ADP,118 and LM75BDP,118 provide active product status with 11-bit resolution matching the original part. Both support the full -55°C to 125°C range and I2C interface. Supply voltage minimum is 2.8V (vs 2.7V original). Package is 8-TSSOP with identical 0.118" width. ROHS3 compliant with MSL-1 moisture sensitivity.
Alternative Substitutes (Active Texas Instruments and Analog Devices Parts)
LM75AIMMX/NOPB (Texas Instruments, Active) and LM75BIMM-3+/LM75BIMM-5+ (Analog Devices, Active) provide functional equivalence with 9-bit resolution. All support -55°C to 125°C range and I2C interface. LM75AIMMX/NOPB uses 8-VSSOP package; Analog Devices parts use 8-uMAX/uSOP package. All are ROHS3 compliant with MSL-1 moisture sensitivity. Minimum supply voltage is 2.7V (LM75AIMMX) or 3V (Analog Devices parts).
Obsolete Alternatives (Continued Inventory)
LM75AIMM/NOPB, LM75AIMME/NOPB, and LM75BIMM-3/NOPB remain available with substantial inventory despite obsolete status. These parts maintain full compatibility with the original specification and are suitable for legacy system support and maintenance applications.
Frequently Asked Questions (FAQ)
Q: Can AT30TS74-XM8M-T directly replace AT30TS75-XM8-T?
A: Yes. Both are Microchip parts with identical package (8-TSSOP/MSOP), temperature range (-55°C to 125°C), resolution (11-bit), and I2C/SMBus interface. AT30TS74 has lower minimum supply voltage (1.7V vs 2.7V) and slightly reduced accuracy (±2°C vs ±1.5°C at 0°C to 55°C). Both are ROHS3 compliant.
Q: What is the difference between 11-bit and 9-bit resolution substitutes?
A: 11-bit resolution provides 0.0625°C per LSB; 9-bit resolution provides 0.5°C per LSB. For applications requiring finer temperature discrimination, 11-bit parts (AT30TS74, AT30TS75A, LM75ADP,118, LM75BDP,118) are preferred. 9-bit alternatives are functionally compatible for applications with coarser measurement requirements.
Q: Are package differences between 8-TSSOP, 8-VSSOP, and 8-uMAX/uSOP significant?
A: All three packages are 8-pin surface mount with 0.118" (3.00mm) width and identical pinout compatibility. PCB footprint differences exist; verify layout compatibility before substitution. All packages support the same electrical specifications.
Q: Which substitute offers the best active product status and availability?
A: AT30TS75A-XM8M-T (Microchip, Active, 18,220 pcs inventory) combines active product status, superior accuracy (±1°C), lowest minimum supply voltage (1.7V), and substantial inventory. LM75AIMMX/NOPB (Texas Instruments, Active, 30,600 pcs) and LM75BIMM-3+/LM75BIMM-5+ (Analog Devices, Active) also provide active status with high inventory levels.
Q: Is supply voltage compatibility critical for substitution?
A: Yes. The original part requires 2.7V minimum. Substitutes with 1.7V minimum (AT30TS74, AT30TS75A) are fully compatible. Parts requiring 2.8V or 3V minimum are compatible only if system supply voltage exceeds these thresholds. Verify system supply voltage before selection.
Q: Can obsolete substitute parts be used in new designs?
A: Obsolete parts are suitable for legacy system maintenance and replacement applications. For new designs, active product status parts are recommended to ensure long-term availability and manufacturer support. Active alternatives include AT30TS75A-XM8M-T, LM75ADP,118, LM75BDP,118, LM75AIMMX/NOPB, LM75BIMM-3+, and LM75BIMM-5+.
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