參數(shù)資料
型號: 5211AI03
英文描述: LOW SKEW, 1-TO-2 DIFFERENTIAL-TO-LVHSTL FANOUT BUFFER
中文描述: 低偏移,1至2差分至LVHSTL扇出緩沖器
文件頁數(shù): 6/13頁
文件大?。?/td> 104K
代理商: 5211AI03
85211AMI-03
www.icst.com/products/hiperclocks.html
REV. B APRIL 8, 2003
6
ICS85211I-03
L
OW
S
KEW
, 1-
TO
-2
D
IFFERENTIAL
-
TO
-LVHSTL F
ANOUT
B
UFFER
S
CHEMATIC
E
XAMPLE
Figure 2shows a schematic example of ICS85211I-03. In this
example, the input is driven by an ICS HiPerClockS LVHSTL
driver. The decoupling capacitors should be physically located
F
IGURE
2. ICS85211I-03 LVHSTL B
UFFER
S
CHEMATIC
E
XAMPLE
near the power pin. For ICS85211I-03, the unused outputs need
to be terminated.
A
PPLICATION
I
NFORMATION
Figure 1shows how the differential input can be wired to accept
single ended levels. The reference voltage V_REF = V
/2 is
generated by the bias resistors R1, R2 and C1. This bias circuit
should be located as close as possible to the input pin. The ratio
F
IGURE
1. S
INGLE
E
NDED
S
IGNAL
D
RIVING
D
IFFERENTIAL
I
NPUT
of R1 and R2 might need to be adjusted to position the V_REF in
the center of the input voltage swing. For example, if the input
clock swing is only 2.5V and V
DD
= 3.3V, V_REF should be 1.25V
and R2/R1 = 0.609.
W
IRING
THE
D
IFFERENTIAL
I
NPUT
TO
A
CCEPT
S
INGLE
E
NDED
L
EVELS
V_REF
R1
1K
C1
0.1u
R2
1K
Single Ended Clock Input
CLK
nCLK
VDD
R4
50
U1
ICS85211-03
1
2
3
4
8
7
6
5
Q0
nQ0
Q1
nQ1
VDD
CLK
nCLK
GND
R6
50
C1
0.1u
HiPerClockS
LVHSTL Driver
Unused
Output
Need To
Be
Terminated
1.8V
LVHSTL Input
+
-
Zo = 50 Ohm
R1
50
ICS
R5
50
LVHSTL
R2
50
Zo = 50 Ohm
VDD=3.3V
R3
50
Zo = 50 Ohm
Zo = 50 Ohm
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