参数资料
型号: ICS87951AYI-147LFT
厂商: INTEGRATED DEVICE TECHNOLOGY INC
元件分类: 时钟及定时
英文描述: LOW SKEW, 1-TO-9 DIFFERENTIAL-TOLVCMOS ZERO DELAY BUFFER
中文描述: 87951 SERIES, PLL BASED CLOCK DRIVER, 9 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQFP32
封装: 7 X 7 MM, 1.40 MM HEIGHT, ROHS COMPLIANT, MS-026BBA, LQFP-32
文件页数: 10/15页
文件大小: 598K
代理商: ICS87951AYI-147LFT
IDT
/ ICS
DIFFERENTIAL-TO-LVCMOS ZERO DELAY BUFFER
10
ICS87951I-147 REV A JUNE 21, 2006
ICS87951I-147
LOW SKEW, 1-TO-9, DIFFERENTIAL-TO-LVCMOS ZERO DELAY BUFFER
F
IGURE
3C. H
I
P
ER
C
LOCK
S CLK/nCLK I
NPUT
D
RIVEN
BY
3.3V LVPECL D
RIVER
F
IGURE
3B. H
I
P
ER
C
LOCK
S CLK/nCLK I
NPUT
D
RIVEN
BY
3.3V LVPECL D
RIVER
F
IGURE
3D. H
I
P
ER
C
LOCK
S CLK/nCLK I
NPUT
D
RIVEN
BY
3.3V LVDS D
RIVER
3.3V
R1
50
R3
50
Zo = 50 Ohm
LVPECL
Zo = 50 Ohm
HiPerClockS
Input
CLK
nCLK
3.3V
R2
50
Zo = 50 Ohm
HiPerClockS
CLK
nCLK
3.3V
R3
R2
84
Zo = 50 Ohm
3.3V
R4
LVPECL
R1
84
3.3V
D
IFFERENTIAL
C
LOCK
I
NPUT
I
NTERFACE
The CLK /nCLK accepts LVDS, LVPECL, LVHSTL, SSTL, HCSL
and other differential signals. Both V
and V
must meet the
V
and V
input requirements. Figures 3A to 3D show interface
examples for the HiPerClockS CLK/nCLK input driven by the most
common driver types. The input interfaces suggested here are
F
IGURE
3A. H
I
P
ER
C
LOCK
S CLK/nCLK I
NPUT
D
RIVEN
BY
ICS H
I
P
ER
C
LOCK
S LVHSTL D
RIVER
examples only. Please consult with the vendor of the driver
component to confirm the driver termination requirements. For
example in Figure 3A, the input termination applies for ICS
HiPerClockS LVHSTL drivers. If you are using an LVHSTL driver
from another vendor, use their termination recommendation.
1.8V
R2
50
LVHSTL Driver
ICS
HiPerClockS
R1
50
LVHSTL
3.3V
Zo = 50 Ohm
Zo = 50 Ohm
HiPerClockS
CLK
nCLK
Zo = 50 Ohm
R1
100
3.3V
LVDS_Driver
Zo = 50 Ohm
Receiver
CLK
nCLK
3.3V
I
NPUTS
:
CLK I
NPUT
:
For applications not requiring the use of a clock input, it can be
left floating. Though not required, but for additional protection, a
1k
resistor can be tied from the CLK input to ground.
CLK/nCLK I
NPUT
:
For applications not requiring the use of the differential input,
both CLK and nCLK can be left floating. Though not required, but
for additional protection, a 1k
resistor can be tied from CLK to
ground.
LVCMOS C
ONTROL
P
INS
:
All control pins have internal pull-ups or pull-downs; additional
resistance is not required but can be added for additional
protection. A 1k
resistor can be used.
R
ECOMMENDATIONS
FOR
U
NUSED
I
NPUT
AND
O
UTPUT
P
INS
O
UTPUTS
:
LVCMOS O
UTPUT
:
All unused LVCMOS output can be left floating. There should be
no trace attached.
相关PDF资料
PDF描述
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