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| 型號(hào)： | EPIC |
| 英文描述： | EPiC Family Product Line (304k) |
| 中文描述： | 史詩系列產(chǎn)品線（304k） |
| 文件頁數(shù)： | 9/12頁 |
| 文件大小： | 304K |
| 代理商： | EPIC |
6
www.semtech.com
HIGH PERFORMANCE PRODUCTS
Revision 1/December 3, 2001
AN1001
Every input and output is fully differential. Single-ended
operation is permitted, but overall accuracy may be infe-
rior to a fully differential topology.
All inputs are also wide voltage differential compliant, al-
lowing a variety of input swings to come directly into the
IN0
IN0*
IN1
IN1*
CLK
IN2
IN2*
IN3
IN3*
OUT0
OUT0*
OUT1
OUT1*
OUT2
OUT2*
OUT3
OUT3*
D
1
0
1
0
1
0
D
D*
1
0
CLK*
SEL*
SEL
EN
EN*
SK44XX Functional Block Diagram
SK44XX Functionality
The 44XX family has similar functionality to the 15XX
and 19XX families, only the 44XX is designed for 1:1
buffer applications rather than fanout applications.
Asychronous Buffer
When used asynchronously (SEL = 1), IN – IN3 pass
directly to OUT0 - OUT3. CLK has no function. EN is
an asynchronous output enable common to all four
outputs.
Synchronous Operation
Asynchronous Operation
OUT
IN
CLK
SEL
EN
OU T
IN
SEL
EN
Differential Inputs / Outputs
N
E
L
E
S
>
3
-
0
<
N
I
K
L
C
>
3
-
0
<
T
U
O
s
t
n
e
m
o
C
0
XXX0
d
e
l
b
a
s
i
D
11
0
X
0
n
o
i
t
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r
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p
O
s
u
o
n
o
r
h
c
n
y
s
A
s
e
s
a
p
>
3
-
0
<
N
I
>
3
-
0
<
T
U
O
o
t
y
l
t
c
e
r
i
d
10
0
1
0
1
n
o
i
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a
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p
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s
u
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h
c
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S
Sychronous Buffer
When used synchronously (SEL = 0), IN0 – IN3 pass
data inputs to the flip-flops, all clocked on the rising
edge of the CLK. EN is an asynchronous output en-
able common to all four outputs.
The following truth table summarizes the 44XX opera-
tion.
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