ICS85104AGI IDT, Integrated Device Technology Inc, ICS85104AGI Datasheet - Page 13

• Manufacturer Part Number: ICS85104AGI
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Driverr

Specifications of ICS85104AGI

• Number Of Clock Inputs: 2
• Output Frequency: 500MHz
• Output Logic Level: HCSL
• Operating Supply Voltage (min): 2.97V
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.63V
• 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

3. Calculations and Equations.
The purpose of this section is to calculate power dissipation on the IC per HCSL output pair.
HCSL output driver circuit and termination are shown in Figure 5.
HCSL is a current steering output which sources a maximum of 17mA of current per output. To calculate worst case on-chip power
dissipation, use the following equations which assume a 50
The highest power dissipation occurs when V
Power
Total Power Dissipation per output pair = 47.3mW
IDT
ICS85104I
LOW SKEW, 1-TO-4, DIFFERENTIAL/LVCMOS-TO-0.7V HCSL FANOUT BUFFER
™
/ ICS
= (V
= (V
= (3.63V – 17mA * 50 ) * 17mA
™
0.7V HCSL FANOUT BUFFER
DD_HIGH
DD_HIGH
– V
– I
OUT
OUT
* R
) * I
L
) * I
OUT,
since V
OUT
R
475
REF =
± 1%
OUT
F
= I
IGURE
OUT
DD
* R
is HIGH.
5. HCSL D
L
I
OUT = 17mA
IC
RIVER
V
load to ground.
DD
13
C
IRCUIT AND
T
ERMINATION
R
50
L
V
ICS85104AGI REV. A FEBRUARY 25, 2009
OUT