PCK2023DGG Philips Semiconductors, PCK2023DGG Datasheet - Page 23

• Manufacturer Part Number: PCK2023DGG
• Description: CK408 66/100/133/200 MHz spread spectrum differential system clock generator
• Manufacturer: Philips Semiconductors

used. The maximum voltage which should be observed at the HOST
Philips Semiconductors
Functional connection
Figure 13 shows a partial diagram of the PCK2023 in an application.
The host outputs are differential current drivers, therefore the output
current is converted to a voltage by using some type of load resistor
(in this case, R
value of R
The I
therefore, I
current can be made. This is coupled to the termination resistors
or HOST pins of the PCK2023 is 1.1 volts. This value may be
determined by using:
2001 Sep 07
CK408 (66/100/133/200 MHz) spread
spectrum differential system clock generator
ref
pin is actually a reference voltage which is fixed at 1.1 volts,
ref
ref
and the setting on MULTSEL0 and MULTSEL1 pins.
is 1.1/R
S
and R
PCK2023
ref
P
. There are limitations on how large the
). The output current is based on two, the
HCLKB
HCLK
I
ref
Figure 13. PCK2023 implementation in a circuit board
R
S
R
ref
R
P
R
S
23
R
P
where R
current multiplier set by MULTSEL0 and MULTSEL1, and R
current reference resistor. V
because of the internal current source configuration.
V
max
+ (R
S
and R
s
P
R
are the termination resistor values, N
P
)N
mult
1.1
R
max
ref
HI
HI
should not exceed 1.1 volts
LOAD
PCK2023
mult
SW00859
Product data
is the
ref
is the