Part Number: TMP75B
Function: 1.8V Capable Digital Temperature Sensor in Industry Standard LM75 form factor & pinout
Package: SOIC-8 and VSSOP-8 Type
Manufacturer: Texas Instruments
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Description
TMP75B is a low-power, digital temperature sensor with an integrated 12-bit ADC and I²C-compatible interface. It is designed as a drop-in, low-voltage replacement for LM75/TMP75 devices, providing accurate temperature monitoring without requiring external components.
Core Characteristics
- Integrated temperature sensor + 12-bit ADC
- I²C (Two-wire) digital interface
- Supply voltage: down to 1.8V (low-power systems)
- Pin and register compatible with LM75 / TMP75
- No external components required
Schematic
Functional Description
- Continuously measures ambient temperature using an internal sensor
- Converts analog temperature signal into digital data via ADC
- Outputs temperature data over I²C bus to MCU/processor
- Includes comparator/interrupt output for threshold-based alerts
Operating Modes
- Continuous Conversion Mode: periodic temperature updates
- Shutdown Mode: ultra-low power, conversions on demand
- Comparator Mode: ALERT triggers when thresholds exceeded
- Interrupt Mode: latched alert until cleared by host
Pinout
Design Considerations
- Place sensor near heat source for accurate monitoring
- Avoid thermal coupling with PCB power components unless intended
- Use proper pull-up resistors on SDA/SCL lines (typically 2kΩ–10kΩ)
- Consider bus capacitance for high-speed I²C operation
- Implement filtering/averaging in firmware for noise-sensitive systems
Advantages Over Analog Sensors
- No ADC required in MCU
- Immune to analog noise and signal degradation
- Easy multi-device integration via I²C
- Consistent accuracy across system
Typical Applications
- Server and CPU thermal monitoring
- Telecommunication systems
- Power supply thermal protection
- Battery management systems (BMS)
- Industrial and embedded systems
Equivalent / Alternative Devices
- LM75 (industry standard baseline)
- TMP75 (earlier TI version)
- TMP102 (lower power, smaller package)
- ADT75 (Analog Devices equivalent)
Other data sheets are available within the file:
T75B, TMP75BQDGKRQ1, TMP75BID, TMP75BIDGKR, TMP75BIDGKT
TMP75B Datasheet PDF Download
