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參數(shù)資料
| 型號： | XRK4993 |
| 廠商： | Exar Corporation |
| 英文描述： | 3.3V PROGRAMMABLE SKEW CLOCK BUFFER |
| 中文描述： | 3.3V的可編程相偏時鐘緩沖器 |
| 文件頁數(shù)： | 10/13頁 |
| 文件大小： | 95K |
| 代理商： | XRK4993 |
XRK4993
10
3.3V PROGRAMMABLE SKEW CLOCK BUFFER
REV. 1.0.0
11.
t
SKEWPR
is defined as the skew between a pair of outputs (Qx0 and Qx1) when all eight outputs are selected for
0t
U
.
t
SKEW0
is defined as the skew between outputs when they are selected for 0t
U
. Other outputs are divided, but not
shifted.
There are two classes of outputs: Nominal (multiple of t
U
delay) and Divided (QC[1:0] or Divide-by-4 mode).
t
DEV
is the output-to-output skew between any two devices operating under the same conditions (V
CC
ambient
temperature, air flow, etc.)
t
ODCV
is the deviation of the output from a 50% duty cycle. Output pulse width variations are included in t
SKEW2
and t
SKEW4
specifications.
Specified with outputs loaded with 20pF for the XRK4993 devices. Devices are terminated through 75
Ω
to V
CC
/2.
t
PWH
is measured at 2.0V. t
PWL
is measured at 0.8V.
t
ORISE
and t
OFALL
measured between 0.8V and 2.0V.
t
LOCK
is the time that is required before synchronization is achieved. This specification is valid only after V
CC
is
stable and within normal operating limits. This parameter is measured from the application of a new signal or
frequency at CLKIN or FB_IN until t
PD
is within specified limits
12.
13.
14.
15.
16.
17.
18.
F
IGURE
6. AC T
IMING
D
IAGRAM
(
SHOWN
WITH
PE=H
IGH
)
CLKIN
FB_IN
Any Q
OTHER Q
CLKIN DIVIDED BY 2
t
REF
t
RPWH
t
RPWL
t
PD
t
ODCV
t
ODCV
t
JR
t
SKEWPR,
t
SKEW0, 1
t
SKEWPR,
t
SKEW0, 1
CLKIN DIVIDED BY 4
t
SKEW3, 4
t
SKEW3, 4
t
SKEW3, 4
t
SKEW1, 3, 4
t
SKEW2, 4
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| XRK4993CR-2 | 制造商:EXAR 制造商全稱:EXAR 功能描述:3.3V PROGRAMMABLE SKEW CLOCK BUFFER |
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| XRK4993IR-5 | 制造商:EXAR 制造商全稱:EXAR 功能描述:3.3V PROGRAMMABLE SKEW CLOCK BUFFER |
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