MAX9485ETP Maxim Integrated Products, MAX9485ETP Datasheet - Page 12

• Manufacturer Part Number: MAX9485ETP
• Description: Clock Generators & Support Products Programmable Audio C lock Generator Gener
• Manufacturer: Maxim Integrated Products

Programmable Audio Clock Generator
When using the MAX9485’s internal VCXO with an
external crystal, connect the crystal to X1 and X2.
Choose an AT-cut crystal that oscillates at 27MHz on its
fundamental mode with ±30ppm. Use a crystal shunt
capacitance less than 12pF, including board parasitic
capacitance. Choose an oscillator with a load capaci-
tance less than 14pF to achieve ±200ppm pullability.
Note: Pulling range may vary depending on the crystal
used. Refer to the MAX9485 Evaluation Kit for details.
Figure 7. 2-Wire Serial Interface
Figure 8. CLK_OUT, MCLK Rise and Fall Time
12
t
CLK_OUT, MCLK
HD, STA
SDA
SCL
RISE AND FALL TIME MEASURED BETWEEN 20% AND 80%.
______________________________________________________________________________________
CONDITION
START
(t
R1
, t
20%
MR
Applications Information
)
80%
t
LOW
t
R
t
SU, DAT
t
HIGH
80%
t
F
(t
20%
F1
Crystal Selection
, t
MF
t
)
HD, DAT
t
SU, STA
REPEATED START
CONDITION
Figure 9. VCXO and PLL Settling Time
CLK_OUT1
CLK_OUT2
2.2V
MCLK
t
V
HD, STA
SDA
TUN
OR
V
DD
t
PO1
t
PO2
t
SU, STO
STOP PULSE AFTER WRITING STOP EDGE
t
TUN
CONDITION
STOP
t
FST
t
BUF
CONDITION
t
START