Serial spi interface timing characteristics, Serial i, C-compatible interface timing characteristics – Rainbow Electronics MAX9452 User Manual
Page 4
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 ±50ppm.
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: C
B
= total capacitance of one bus line in pF. Tested with C
B
= 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
f
SCL
2
MHz
CS Fall to CLK Rise Setup Time
t
CSS
12.5
ns
DIN Setup Time
t
DS
12.5
ns
DIN Hold Time
t
DH
0
ns
CLK High to
CS High
t
CSH
0
ns
CS Pulse-High Time
t
CSW
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.)
MAX9450/MAX9451/MAX9452
High-Precision Clock Generators
with Integrated VCXO
4
_______________________________________________________________________________________
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Serial Clock
f
SCL
400
kHz
Bus Free Time Between STOP and
START Conditions
t
BUF
1.3
µs
Rep eated H ol d Ti m e S TART C ond i ti on
t
HD,STA
0.6
µs
Rep eated S TART C ond i ti on S etup Ti m e
t
SU,STA
0.6
µs
STOP Condition Setup Time
t
SU,STO
0.6
µs
Data Hold Time
t
HD,DAT
(Note 3)
100
ns
Data Setup Time
t
SU,DAT
100
ns
SCL Clock-Low Period
t
LOW
1.3
µs
SCL Clock-High Period
t
HIGH
0.7
µs
Maximum Receive SCL/SDA Rise Time
t
R
300
ns
Minimum Receive SCL/SDA Rise Time
t
R
(Note 4)
20
+ 0.1 x C
b
ns
Maximum Receive SCL/SDA Fall Time
t
F
300
ns
Minimum Receive SCL/SDA Fall Time
t
F
(Note 4)
20
+ 0.1 x C
b
ns
Fall Time of SDA, Transmitting
t
F,TX
(Note 4)
20
+ 0.1C
b
250
ns
Pulse Width of Suppressed Spike
t
SP
(Note 5)
0
50
ns
Capacitive Load for Each Bus Line
C
B
(Note 4)
400
pF
SERIAL I
2
C-COMPATIBLE INTERFACE TIMING CHARACTERISTICS
(VDD = 2.4V to 3.6V, TA = -40°C to +85°C. See Figure 4 for the timing parameters definition.)