PCT2075

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Product data sheet

Rev. 9.1 — 21 April 2017

24 of 37

NXP Semiconductors

PCT2075

I2C-bus Fm+ digital temperature sensor and thermal watchdog

12. Dynamic characteristics

[1]

These specifications are guaranteed by design and not tested in production.

[2]

This is the SDA time LOW for reset of serial interface.

[3]

Holding the SDA line LOW for a time greater than tto will cause the device to reset SDA to the idle state of the serial bus communication

(SDA set HIGH).

Table 21.

I2C-bus interface dynamic characteristics[1]

VCC = 2.7 V to 5.5 V; Tamb = 55 C to +125 C; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fSCL

SCL clock frequency

see Figure 27

20

-

1000

kHz

tHIGH

HIGH period of the SCL clock

0.26

-

-

s

tLOW

LOW period of the SCL clock

0.5

-

-

s

tHD;STA

hold time (repeated) START condition

0.26

-

-

s

tSU;DAT

data set-up time

50

-

-

ns

tHD;DAT

data hold time

0

-

-

ns

tSU;STO

set-up time for STOP condition

0.26

-

-

s

tf

fall time

SDA and OS outputs;

CL = 450 pF; IOL =30mA

-120

-ns

tto(SMBus)

SMBus time-out time

[2][3] 25

-

35

ms

Fig 27. Timing diagram

SDA

SCL

002aah456

tf

S

Sr

P

S

tHD;STA

tLOW

tr

tSU;DAT

tf

tHD;DAT

tHIGH

tSU;STA

tHD;STA

tSP

tSU;STO

tr

tBUF

0.7 × VCC

0.3 × VCC

0.7 × VCC

0.3 × VCC