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SI7005-B-FM

DIGITAL I2C HUMIDITY AND TEMPERATURE SENSOR

Silicon Laboratories 

Si7005

Table 3. I2C Interface Specifications*

2.1 VDD  3.6 V; TA = 0 to 70 °C (F grade) or –40 to +85 °C (G grade) unless otherwise noted.

Parameter

Symbol

Test Condition

Min

Typ

Hysteresis

VHYS High-to-low versus low-to- 0.05 x VDD —

high transition

SCLK Frequency

fSCL

—

—

SCL high time

tSKH

0.6

—

SCL low time

tSKL

1.3

—

Start hold time

tSTH

0.6

—

Start setup time

tSTS

0.6

—

Stop setup time

tSPS

0.6

—

Bus free time

tBUF

Between Stop and Start

1.3

—

SDA setup time

tDS

100

—

SDA hold time

tDH

100

—

SDA valid time

tVD;DAT From SCL low to data valid

—

—

SDA acknowledge valid time tVD;ACK From SCL low to data valid

—

—

*Note: All values are referenced to VIL and/or VIH.

Max Unit

—

V

400 kHz

—

µs

—

µs

—

µs

—

µs

—

µs

—

µs

—

ns

—

ns

0.9

µs

0.9

µs

1/fSCL

tSKH

tSKL

SCL

tBUF

tSTH

tDS

tDH

tSPS

SDA

Start Bit

tSTS

D7

D6

D5

D0

R/W

ACK

Figure 1. I2C Interface Timing Diagram

tVD : ACK

Stop Bit

6

Rev. 1.3

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