ZDP323B Series Digital PIR Sensor

Product Specification

____________________________________________________________________________

PS041703-0324 - Preliminary

Page 18

15.3 I2C Interface

Table 8 - I2C Interface

Symbol

Parameter

Specification

Units

Standard Mode

Fast Mode

Min.

Max.

Min.

Max.

FSCL

SCL Clock Frequency

0

100

0

400

KHz

TLOW:SCL

SCL Low Time

4.7

-

1.3

-

µs

THIGH:SCL

SCL High Time

4.0

-

0.6

-

µs

THOLD:START

Hold time for Repeated

START condition

4.0

-

0.6

-

µs

TSU:START

Set-up time for repeated

START condition

4.7

-

0.6

-

µs

THOLD:DATA

Data hold time

0(3)

3.45(4)

0(3)

0.9(4)

µs

TSU:DATA

Data set-up time

250

-

100

-

ns

TSU:STOP

Set-up time for STOP

condition

4.0

-

0.6

-

µs

TR

Rise time of both SDA and

SCL signals

-

1000

20

300

ns

TF

Fall time of both SDA and

SCL signals

-

300

-

300

ns

TBUF

Bus free time between a

STOP and START

condition

4.7

-

1.3

-

µs

CB

Capacitive load for each

bus line

400(2)

400(2)

pF

Notes:

(1) The I2C bus specifications in Table 8 are based on the VDD and GND level within the

supply voltage range.

(2) CB is total capacitance of one bus line.

(3) A device must internally provide a hold time of at least 300nsec. For the SDA signal to

bridge the undefined region of the falling edge of SCL.

(4) The maximum THOLD:DATA has only to be met if the device does not stretch the Low period

(TLOW:SCL) of the SCL signal.