JAJSIC9A October 2015 – October 2015 TMP107-Q1
PRODUCTION DATA.
To avoid any bus contention between the host and the TMP107-Q1 devices, use a tri-state buffer, such as the SN74LVC1G125. Use a 100-Ω resistor (typical) in series with the RX input to limit the amount of current in case of overshoot. A 10-Ω resistor (typical) between the tri-state buffer and the first TMP107-Q1 device reduces any signal collisions between the buffer and the TMP107-Q1 by limiting the amount of current flow. The pullup resistor at the output of the tri-state buffer defines the baud rate of communication. Use a 4.1-kΩ pullup resistor, as shown in Figure 39, to support the entire baud rate range specified in the Timing Requirements. A 0.1-μF bypass capacitor is recommended for each TMP107-Q1 device in the daisy-chain.