ICS85357AGI-01T IDT, Integrated Device Technology Inc, ICS85357AGI-01T Datasheet - Page 7

• Manufacturer Part Number: ICS85357AGI-01T
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Multiplexerr

Specifications of ICS85357AGI-01T

• Number Of Clock Inputs: 4/2
• Mode Of Operation: Differential
• Output Frequency: 750MHz
• Output Logic Level: ECL/LVPECL
• Operating Supply Voltage (min): -3.135/3.135V
• Operating Supply Voltage (typ): -3.3/3.3V
• Operating Supply Voltage (max): -3.465/3.465V
• Package Type: TSSOP
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 20
• Lead Free Status / RoHS Status: Not Compliant

ICS85357I-01 Data Sheet
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 2A. CLK/nCLK Input
Figure 2C. CLK/nCLK Input
Figure 2E. CLK/nCLK Input
ICS85357AGI-01 REVISION A SEPTEMBER 1, 2010
CMR
3.3V
1.8V
3.3V
HCSL
LVPECL
input requirements. Figures 2A to 2F show interface
*Optional – R3 and R4 can be 0Ω
LVHSTL
IDT
LVHSTL Driver
Driven by an IDT Open Emitter
HiPerClockS LVHSTL Driver
Driven by a 3.3V LVPECL Driver
Driven by a 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
7
Please consult with the vendor of the driver component to confirm the
driver termination requirements. For example, in Figure 2A, 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 2B. CLK/nCLK Input
Figure 2D. CLK/nCLK Input
Figure 2F. CLK/nCLK Input
2.5V
3.3V
3.3V
LVDS
4:1 OR 2:1, DIFFERENTIAL-TO-3.3V LVPECL CLOCK MULTIPLEXER
SSTL
LVPECL
Driven by a 3.3V LVPECL Driver
Driven by a 3.3V LVDS Driver
Driven by a 2.5V SSTL Driver
Zo = 60Ω
Zo = 60Ω
Zo = 50Ω
Zo = 50Ω
Zo = 50Ω
Zo = 50Ω
©2010 Integrated Device Technology, Inc.
R3
120Ω
2.5V
R1
120Ω
R1
50Ω
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