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Version 3 – August 2020

8/23

3 Pin Assignment

The SHT85 comes with a 4-pin-type connector, see Table 6.

Pin

Name

Comments

1

SCL

Serial clock; input only

2

VDD

Supply voltage; input

3

VSS

Ground

4

SDA

Serial data; input / output

Table 6: SHT85 pin assignment (transparent top view). The die pad is

internally connected to VSS.

3.1 Power Pins (VDD, VSS)

The electrical specifications of the SHT85 are shown in Table 3. Decoupling of VDD and VSS by a 100nF capacitor is

integrated on the front side of the sensor packaging. See Figure 4 for a typical application circuit.

Figure 4: Typical application circuit

3.2 Serial Clock and Serial Data (SCL, SDA)

SCL is used to synchronize the communication between microcontroller and the sensor. The clock frequency can be

freely chosen between 0 to 1000 kHz.

The SDA pin is used to transfer data to and from the sensor. Communication with frequencies up to 400 kHz must meet

in Table 20.

14 http://www.nxp.com/documents/user_manual/UM10204.pdf