參數(shù)資料
型號(hào): PCK2023DL
廠商: NXP SEMICONDUCTORS
元件分類: XO, clock
英文描述: CK408 66/100/133/200 MHz spread spectrum differential system clock generator
中文描述: 200 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO56
封裝: 7.50 MM, PLASTIC, MO-118, SOT-371-1, SSOP-56
文件頁數(shù): 23/30頁
文件大?。?/td> 177K
代理商: PCK2023DL
Philips Semiconductors
Product data
PCK2023
CK408 (66/100/133/200 MHz) spread
spectrum differential system clock generator
2001 Sep 07
23
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
S
and R
P
). The output current is based on two, the
value of R
ref
and the setting on MULTSEL0 and MULTSEL1 pins.
The I
ref
pin is actually a reference voltage which is fixed at 1.1 volts,
therefore, I
ref
is 1.1/R
ref
. There are limitations on how large the
current can be made. This is coupled to the termination resistors
used. The maximum voltage which should be observed at the HOST
or HOST pins of the PCK2023 is 1.1 volts. This value may be
determined by using:
V
max
(
R
s
R
P
)
N
mult
1.1
R
ref
where R
S
and R
P
are the termination resistor values, N
mult
is the
current multiplier set by MULTSEL0 and MULTSEL1, and R
ref
is the
current reference resistor. V
max
should not exceed 1.1 volts
because of the internal current source configuration.
R
S
R
S
R
P
R
P
R
ref
HI
I
ref
HCLK
HCLKB
PCK2023
LOAD
HI
SW00859
Figure 13. PCK2023 implementation in a circuit board
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