Data Sheet

MLX90614 family
Single and Dual Zone
Infra Red Thermometer in TO-39
Thdac(MD) is the time after the ninth falling edge of SCL that MLX90614 will take control of the PWM/SDA
(so it can continue with the next byte to transmit).
The indexes MD and SD for the latest timings are used – MD when the master device is making
acknowledge; SD when the slave device is making acknowledge-. For other timings see [1].
PWM/SDA
SCL
Tsuac Thdac
Timeout,L Timeout,H
Figure 7: SMBus timing
8.4.5 Bit transfer
PWM/SDA
SCL
Sampling
data
Changing
data
Figure 8: Bit transfer on SMBus
The data on PWM/SDA must be changed when SCL is low (min 300ns after the falling edge of SCL). The
data is fetched by both MD and SDs on the rising edge of the SCL.
3901090614 Page 17 of 42 Data Sheet
Rev 004 30/Jul2008