Product Overview
The LM75A/B/C is an industrial-standard digital temperature sensor and thermal monitor designed for general system thermal management. It offers precise temperature measurement with an error of less than 1C across a wide operating range of -40C to +125C. Featuring a dual-wire interface (I2C compatible), it supports connecting up to eight devices on a single bus. The LM75 is ideal for applications requiring accurate thermal monitoring and protection, such as communication infrastructure, electronic test equipment, and environmental monitoring. Its programmable temperature limits and ALERT pin allow it to function as a thermostat or over-temperature alarm. The device operates from a single +2.7V to +5.5V supply and requires no external components.
Product Attributes
- Brand: LM75A/B/C
- Interface: I2C (Dual-wire)
- Packaging Options: SOIC-8, MSOP-8
Technical Specifications
| Specification | Value | Unit |
|---|---|---|
| Supply Voltage (LM75) | 2.7 to 5.5 | V |
| Supply Voltage (General) | 1.4 to 5.5 | V |
| Operating Temperature Range | -40 to 125 | C |
| Temperature Accuracy (1C) | -40C to +125C | |
| Temperature Resolution | 0.0625 | C |
| Temperature Sensor Output | 12-bit digital | |
| Maximum Devices per Bus | 8 | |
| Typical Conversion Rate | 12 | Conv/s |
| Bus Timeout Function | 22 (typical) | ms |
| I2C Bus Frequency (Fast Mode) | 0.001 to 0.4 | MHz |
| I2C Bus Frequency (High-Speed Mode) | 0.001 to 2.75 | MHz |
| Average Quiescent Current (Idle) | 15 to 37 | A |
| Shutdown Current (Idle) | < 0.5 | A |
| ESD Protection (HBM) | 5000 | V |
| ESD Protection (MM) | 300 | V |
| Pin Configuration (SDA) | Serial Data Pin, Open-drain, requires pull-up | |
| Pin Configuration (SCL) | Serial Clock Pin, Open-drain, requires pull-up | |
| Pin Configuration (ALERT) | Over-temperature Alert Pin, Open-drain, requires pull-up | |
| Pin Configuration (A0, A1, A2) | Address Selection Pins |
2411111138_Tudi-LM75CIMMX-3-TUDI_C41417246.pdf
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