Omron D6T Series - Electrical Connection Scenarios; 5 V Microcontroller Connection; 3 V Microcontroller Connection; Using I2 C Level Converter

D6T MEMS Thermal Sensors User’s Manual (A284) 6
6.2 Example Electrical Connections
Scenario 1: 5 V MCU Direct Connection (Same voltage as the microcontroller power supply)
Fig. 7. Connecting to 5 V Microcontroller
Scenario 2: 3 V MCU (I2C port is 5 V fault tolerant)
D6T
VCC
SDA
SCL
GND
VDD
SDA
SCL
GND
MCU
R R
5V3V
Fig. 8. 5 V Fault Tolerant Specification
Scenario 3: Using an I2C Level Converter
(Not a 5 V fault tolerant specification, or other devices are also connected to
the 3 V I2C bus)
D6T
VCC
SDA
SCL
GND
VDD
SDA
SCL
GND
MCU
R R
I2C
Level
Translating
R R
5V
Ex. PCA9517
Fig. 9. Using a Level Converter
D6T
VCC
SDA
SCL
GND
VDD5
SDA
SCL
GND
MCU
Power
circuit
5V
GND
R
R
I2C
level
converter