ICS8543BG IDT, Integrated Device Technology Inc, ICS8543BG Datasheet - Page 11

• Manufacturer Part Number: ICS8543BG
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Driverr

Specifications of ICS8543BG

• Number Of Clock Inputs: 2
• Mode Of Operation: Differential
• Output Frequency: 800MHz
• Output Logic Level: LVDS
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.465V
• Package Type: TSSOP
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 20
• Lead Free Status / RoHS Status: Not Compliant

ICS8543 Data Sheet
3.3V Differential Clock Input Interface
The CLK /nCLK accepts LVDS, LVPECL, LVHSTL, SSTL, HCSL and
other differential signals. Both V
and V
examples for the CLK/nCLK input driven by the most common driver
types. The input interfaces suggested here are examples only.
Figure 3A. CLK/nCLK Input Driven by an
Figure 3C. CLK/nCLK Input Driven by a
Figure 3E. CLK/nCLK Input Driven by a
ICS8543BG REVISION E DECEMBER 17, 2010
CMR
3.3V
1.8V
3.3V
HCSL
LVPECL
input requirements. Figures 3A to 3F show interface
*Optional – R3 and R4 can be 0Ω
LVHSTL
IDT
LVHSTL Driver
IDT Open Emitter LVHSTL Driver
3.3V LVPECL Driver
3.3V HCSL Driver
*R3
*R4
Zo = 50Ω
Zo = 50Ω
Zo = 50Ω
Zo = 50Ω
33Ω
33Ω
Zo = 50Ω
Zo = 50Ω
SWING
R3
125Ω
R1
50Ω
3.3V
R1
84Ω
R1
50Ω
and V
R4
125Ω
R2
50Ω
R2
84Ω
OH
R2
50Ω
must meet the V
CLK
nCLK
CLK
nCLK
CLK
nCLK
3.3V
3.3V
3.3V
Differential
Input
Differential
Input
Differential
Input
PP
11
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.
Figure 3B. CLK/nCLK Input Driven by a
Figure 3D. CLK/nCLK Input Driven by a 3.3V LVDS Driver
Figure 3F. CLK/nCLK Input Driven by a 2.5V SSTL Driver
2.5V
3.3V
3.3V
LVDS
SSTL
LVPECL
3.3V LVPECL Driver
LOW SKEW, 1-to-4, DIFFERENTIAL-TO-LVDS FANOUT BUFFER
Zo = 60Ω
Zo = 60Ω
Zo = 50Ω
Zo = 50Ω
Zo = 50Ω
Zo = 50Ω
R3
120Ω
2.5V
R1
120Ω
R1
50Ω
©2010 Integrated Device Technology, Inc.
R2
50Ω
R4
120Ω
R2
120Ω
R2
50Ω
R1
100Ω
CLK
nCLK
CLK
nCLK
CLK
nCLK
3.3V
3.3V
3.3V
Differential
Input
Differential
Input
Receiver