Note 1: All timing AC electrical characteristics and timing specifications are guaranteed by design and not production tested.

Note 2: The VCXO tracks the input clock frequency by ±60ppm.

Note 3: A master device must provide a hold time of at least 300ns for the SDA signal to bridge the undefined regions of SCL’s

falling edge.

Note 4: CB = total capacitance of one bus line in pF. Tested with CB = 400pF.

Note 5: Input filters on SDA and SCL suppress noise spikes less than 50ns.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Serial-Clock Frequency

fSCL

2

MHz

CS Fall to CLK Rise Setup Time

tCSS

12.5

ns

DIN Setup Time

tDS

12.5

ns

DIN Hold Time

tDH

0ns

CLK High to

CS High

tCSH

0ns

CS Pulse-High Time

tCSW

20

ns

SERIAL SPI INTERFACE TIMING CHARACTERISTICS

(VDD = 2.4V to 3.6V, TA = -40°C to +85°C. See Figure 7 for the timing parameters definition.)

High-Precision Clock Generators

with Integrated VCXO

4

_______________________________________________________________________________________

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Serial Clock

fSCL

400

kHz

Bus Free Time Between STOP and

START Conditions

tBUF

1.3

µs

Repeated Hold Time START Condition

tHD,STA

0.6

µs

Repeated START Condition Setup TimetSU,STA

0.6

µs

STOP Condition Setup Time

tSU,STO

0.6

µs

Data Hold Time

tHD,DAT

(Note 3)

100

ns

Data Setup Time

tSU,DAT

100

ns

SCL Clock-Low Period

tLOW

1.3

µs

SCL Clock-High Period

tHIGH

0.7

µs

Maximum Receive SCL/SDA Rise Time

tR

300

ns

Minimum Receive SCL/SDA Rise Time

tR

(Note 4)

20

+ 0.1 x Cb

ns

Maximum Receive SCL/SDA Fall Time

tF

300

ns

Minimum Receive SCL/SDA Fall Time

tF

(Note 4)

20

+ 0.1 x Cb

ns

Fall Time of SDA, Transmitting

tF,TX

(Note 4)

20

+ 0.1Cb

250

ns

Pulse Width of Suppressed Spike

tSP

(Note 5)

0

50

ns

Capacitive Load for Each Bus Line

CB

(Note 4)

400

pF

SERIAL I2C-COMPATIBLE INTERFACE TIMING CHARACTERISTICS

(VDD = 2.4V to 3.6V, TA = -40°C to +85°C. See Figure 4 for the timing parameters definition.)