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LM75BDP/DG,118 Equivalent & Substitute Parts
Part Overview
The LM75BDP/DG,118 is a digital temperature sensor manufactured by NXP USA Inc., designed for local temperature measurement across the -55°C to 125°C range with 11-bit resolution and I2C output interface. This component is classified as obsolete, which necessitates identification of active equivalent alternatives for new designs and ongoing production requirements. The sensor operates on supply voltages between 2.8V and 5.5V, features programmable output switching and limit functions, and is packaged in an 8-TSSOP surface mount configuration.
Substiute Parts
Key Parameters
| Parameter | LM75BDP/DG,118 |
|---|---|
| Manufacturer | NXP USA Inc. |
| Product Status | Obsolete |
| Sensor Type | Digital, Local |
| Sensing Temperature Range | -55°C ~ 125°C |
| Output Type | I2C |
| Supply Voltage | 2.8V ~ 5.5V |
| Resolution | 11 bits |
| Accuracy | ±2°C (±3°C) |
| Features | Output Switch, Programmable Limit |
| Package | 8-TSSOP |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the LM75BDP/DG,118 is determined by the following critical parameters:
- Temperature Sensing Range: Must support -55°C to 125°C minimum
- Resolution: 11-bit minimum
- Output Interface: I2C or I2C/SMBus compatible
- Supply Voltage: Must operate within or encompass 2.8V to 5.5V range
- Package Type: 8-TSSOP or 8-MSOP (mechanically and electrically compatible)
- Mounting: Surface mount configuration
- Compliance: ROHS3 compliant
All identified substitute parts meet these core electrical and mechanical requirements. Microchip Technology AT30 series components provide direct functional equivalence with enhanced feature sets including programmable resolution and shutdown modes. The substitutes maintain I2C/SMBus protocol compatibility and identical package footprints.
Parameter Comparison
| Part Number | Manufacturer | Status | Temp Range | Resolution | Output | Supply Voltage | Accuracy | Package | MSL |
|---|---|---|---|---|---|---|---|---|---|
| LM75BDP/DG,118 | NXP USA Inc. | Obsolete | -55°C ~ 125°C | 11 b | I2C | 2.8V ~ 5.5V | ±2°C (±3°C) | 8-TSSOP | 1 |
| LM75BDP,118 | NXP USA Inc. | Active | -55°C ~ 125°C | 11 b | I2C | 2.8V ~ 5.5V | ±2°C (±3°C) | 8-TSSOP | 1 |
| AT30TS74-XM8M-B | Microchip Technology | Active | -55°C ~ 125°C | 11 b | I2C/SMBus | 1.7V ~ 5.5V | ±2°C (±3°C) | 8-TSSOP/MSOP | 3 |
| AT30TS74-XM8M-T | Microchip Technology | Active | -55°C ~ 125°C | 11 b | I2C/SMBus | 1.7V ~ 5.5V | ±2°C (±3°C) | 8-TSSOP/MSOP | 3 |
| AT30TS750A-XM8M-B | Microchip Technology | Active | -55°C ~ 125°C | 11 b | I2C/SMBus | 1.7V ~ 5.5V | ±1°C (±3°C) | 8-TSSOP/MSOP | 3 |
| AT30TS750A-XM8M-T | Microchip Technology | Active | -55°C ~ 125°C | 11 b | I2C/SMBus | 1.7V ~ 5.5V | ±1°C (±3°C) | 8-TSSOP/MSOP | 1 |
| AT30TS75A-XM8M-T | Microchip Technology | Active | -55°C ~ 125°C | 11 b | I2C/SMBus | 1.7V ~ 5.5V | ±1°C (±3°C) | 8-TSSOP/MSOP | 3 |
| AT30TSE752A-XM8M-B | Microchip Technology | Active | -55°C ~ 125°C | 11 b | I2C/SMBus | 1.7V ~ 5.5V | ±1°C (±3°C) | 8-TSSOP/MSOP | 3 |
| AT30TSE754A-XM8M-B | Microchip Technology | Active | -55°C ~ 125°C | 11 b | I2C/SMBus | 1.7V ~ 5.5V | ±1°C (±3°C) | 8-TSSOP/MSOP | 3 |
| AT30TSE754A-XM8M-T | Microchip Technology | Active | -55°C ~ 125°C | 11 b | I2C/SMBus | 1.7V ~ 5.5V | ±1°C (±3°C) | 8-TSSOP/MSOP | 3 |
| AT30TSE758A-XM8M-T | Microchip Technology | Active | -55°C ~ 125°C | 11 b | I2C/SMBus | 1.7V ~ 5.5V | ±1°C (±3°C) | 8-TSSOP/MSOP | 1 |
Engineering Selection Recommendations
Primary Recommendation: LM75BDP,118
The LM75BDP,118 from NXP USA Inc. is the direct active equivalent to the obsolete LM75BDP/DG,118. This part maintains identical electrical specifications, accuracy parameters, and supply voltage range. The component is currently in active production status with substantial inventory availability (13,551 units), ensuring supply chain continuity. Both parts are ROHS3 compliant and carry equivalent regulatory certifications.
Secondary Recommendations: Microchip AT30 Series
The Microchip Technology AT30 series components (AT30TS74, AT30TS750A, AT30TS75A, AT30TSE752A, AT30TSE754A, AT30TSE758A) provide functional substitution with enhanced specifications. These parts deliver:
- Identical temperature sensing range and 11-bit resolution
- I2C/SMBus protocol compatibility
- Lower minimum supply voltage (1.7V vs. 2.8V)
- Superior accuracy in select models (±1°C vs. ±2°C)
- Expanded feature sets including programmable resolution and shutdown modes
- Active production status with robust inventory levels
- ROHS3 compliance
Packaging and Moisture Sensitivity Considerations
The LM75BDP,118 offers MSL rating 1 (unlimited moisture sensitivity level), while most Microchip alternatives carry MSL rating 3 (168 hours). For applications requiring extended storage or high-humidity environments, AT30TS750A-XM8M-T and AT30TSE758A-XM8M-T provide MSL rating 1 compatibility.
Packaging variants (Bulk, Cut Tape, Tube, Tape & Reel) are available across the substitute range to accommodate different procurement and assembly workflows.
Frequently Asked Questions (FAQ)
Q: Can AT30TS74-XM8M-T directly replace LM75BDP/DG,118 in existing designs?
A: Yes. Both components share identical temperature sensing range (-55°C to 125°C), 11-bit resolution, I2C protocol compatibility, and 8-TSSOP/MSOP package footprints. The AT30TS74-XM8M-T operates across a wider supply voltage range (1.7V to 5.5V) and maintains equivalent accuracy specifications (±2°C to ±3°C). Pin-to-pin compatibility and protocol compatibility enable direct substitution without circuit modification.
Q: What is the difference between AT30TS74 and AT30TS750A variants?
A: Both maintain identical temperature range, resolution, and package specifications. The AT30TS750A series provides improved accuracy (±1°C vs. ±2°C) and includes additional programmable features. Selection depends on application accuracy requirements and feature utilization.
Q: Why do some substitutes have lower minimum supply voltage (1.7V vs. 2.8V)?
A: Microchip AT30 series components are designed with broader supply voltage compatibility. The LM75BDP/DG,118 specifies 2.8V minimum, while AT30 alternatives operate down to 1.7V. This expanded range provides design flexibility for battery-powered and low-voltage applications without compromising performance within the original 2.8V to 5.5V operating window.
Q: What does MSL rating 3 (168 hours) mean for component storage?
A: MSL (Moisture Sensitivity Level) 3 indicates the component can be stored in standard conditions (23°C, 50% relative humidity) for up to 168 hours before requiring baking prior to reflow soldering. MSL rating 1 (unlimited) components have no moisture sensitivity restrictions. For applications with extended storage or high-humidity environments, select AT30TS750A-XM8M-T or AT30TSE758A-XM8M-T, which carry MSL rating 1.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All identified substitute components, including LM75BDP,118 and the complete Microchip AT30 series, maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with current environmental and hazardous substance directives.
Q: What packaging options are available for production quantities?
A: Substitute parts are available in multiple packaging formats: Cut Tape (CT) & Digi-Reel for standard production, Bulk for large-volume procurement, Tube for moderate quantities, and Tape & Reel (TR) for automated assembly lines. Selection depends on manufacturing workflow and volume requirements.
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