ICS83940DYI IDT, Integrated Device Technology Inc, ICS83940DYI Datasheet - Page 12

• Manufacturer Part Number: ICS83940DYI
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Driverr

Specifications of ICS83940DYI

• Number Of Clock Inputs: 2
• Output Frequency: 250MHz
• Output Logic Level: LVCMOS/LVTTL
• Operating Supply Voltage (min): 2.375V
• Operating Supply Voltage (typ): 2.5/3.3V
• Operating Supply Voltage (max): 3.465V
• Package Type: LQFP
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 32
• Lead Free Status / Rohs Status: Not Compliant

ICS83940DI Data Sheet
LVPECL Clock Input Interface
The PCLK /nPCLK accepts LVPECL, CML, SSTL and other
differential signals. Both differential signals must meet the V
V
for the PCLK/nPCLK input driven by the most common driver types.
Figure 2A. PCLK/nPCLK Input
Figure 2C. PCLK/nPCLK Input
Figure 2E. PCLK/nPCLK Input
ICS83940DYI REVISION C SEPTEMBER 7, 2010
CMR
3.3V
input requirements. Figures 2A to 2E show interface examples
2.5V
3.3V
CML
LVPECL
SSTL
Driven by a CML Driver
Driven by a 3.3V LVPECL Driver
Driven by an SSTL Driver
Zo = 60Ω
Zo = 60Ω
Zo = 50Ω
Zo = 50Ω
Zo = 50Ω
Zo = 50Ω
R3
125Ω
R3
120
2.5V
3.3V
R1
50Ω
R1
120
3.3V
R1
84Ω
R4
120
R4
125Ω
R2
50Ω
R2
120
R2
84Ω
PCLK
nPCLK
PCLK
nPCLK
PCLK
nPCLK
3.3V
3.3V
3.3V
LVPECL
Input
LVPECL
Input
LVPECL
Input
PP
and
12
The input interfaces suggested here are examples only. If the driver
is from another vendor, use their termination recommendation.
Please consult with the vendor of the driver component to confirm the
driver termination requirements.
Figure 2B. PCLK/nPCLK Input
Figure 2D. PCLK/nPCLK Input Driven by
3.3V
3.3V
CML Built-In Pullup
3.3V LVPECL
LOW SKEW, 1-TO-18 LVPECL-TO-LVCMOS/LVTTL FANOUT BUFFER
R5
100 - 200
Driven by a Built-In Pullup CML Driver
a 3.3V LVPECL Driver with AC Couple
R6
100 - 200
Zo = 50Ω
Zo = 50Ω
Zo = 50Ω
Zo = 50Ω
©2010 Integrated Device Technology, Inc.
C1
C2
R1
100Ω
R3
84
3.3V
R1
125
R4
84
R2
125
PCLK
nPCLK
PCLK
nPCLK
3.3V
3.3V
LVPECL
Input
LVPECL
Input