ICS8543I 데이터 시트보기 (PDF) - Renesas Electronics
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ICS8543I Datasheet PDF : 18 Pages
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ICS8543I Data Sheet
LOW SKEW, 1-to-4, DIFFERENTIAL-TO-LVDS FANOUT BUFFER
Differential Clock Input Interface
The CLK /nCLK accepts LVDS, LVPECL, LVHSTL, SSTL, HCSL and
other differential signals. Both signals must meet the VPP and VCMR
input requirements. Figures 3A to 3F show interface examples for the
CLK/nCLK input driven by the most common driver types. The input
interfaces suggested here are 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 IDT open emitter LVHSTL drivers. If you are using an
LVHSTL driver from another vendor, use their termination
recommendation.
1.8V
Zo = 50Ω
Zo = 50Ω
LVHSTL
IDT
LVHSTL Driver
3.3V
CLK
R1
R2
50Ω
50Ω
nCLK
Differential
Input
Figure 3A. CLK/nCLK Input Driven by an
IDT Open Emitter LVHSTL Driver
3.3V
LVPECL
Zo = 50Ω
Zo = 50Ω
3.3V
CLK
R1
R2
50Ω
50Ω
nCLK
Differential
Input
R2
50Ω
Figure 3B. CLK/nCLK Input Driven by a
3.3V LVPECL Driver
3.3V
LVPECL
Zo = 50Ω
Zo = 50Ω
3.3V
R3
125Ω
R4
125Ω
3.3V
CLK
nCLK
Differential
R1
R2
84Ω
84Ω
Input
3.3V
LVDS
Zo = 50Ω
Zo = 50Ω
3.3V
R1
100Ω
CLK
nCLK
Receiver
Figure 3C. CLK/nCLK Input Driven by a
3.3V LVPECL Driver
3.3V
3.3V
*R3 33Ω
Zo = 50Ω
Zo = 50Ω
*R4 33Ω
HCSL
R1
50Ω
*Optional – R3 and R4 can be 0Ω
CLK
nCLK
R2
50Ω
Differential
Input
Figure 3D. CLK/nCLK Input Driven by a
3.3V LVDS Driver
2.5V
SSTL
Zo = 60Ω
Zo = 60Ω
2.5V
R3
120Ω
R4
120Ω
3.3V
CLK
R1
120Ω
R2
120Ω
nCLK
Differential
Input
Figure 3E. CLK/nCLK Input Driven by a
3.3V HCSL Driver
ICS8543BGI REVISION E NOVEMBER 15, 2012
Figure 3F. CLK/nCLK Input Driven by a
2.5V SSTL Driver
10
©2012 Integrated Device Technology, Inc.
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