851021AYLF IDT, 851021AYLF Datasheet - Page 13

• Manufacturer Part Number: 851021AYLF
• Description: Clock Drivers & Distribution
• Manufacturer: IDT

Specifications of 851021AYLF

• Product Category: Clock Drivers & Distribution
• Rohs: yes
• Part # Aliases: ICS851021AYLF

ICS851021 Data Sheet
ICS851021AY REVISION B MARCH 3, 2010
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 6.
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 50Ω load to ground.
The highest power dissipation occurs when V
Power
Total Power Dissipation per output pair = 47.3mW
= (V
= (V
= (3.63V – 17mA * 50Ω) * 17mA
DD_HIGH
DD_HIGH
– V
– I
OUT
OUT
* R
) * I
L
) * I
OUT,
OUT
since V
R
475
REF =
Ω
± 1%
OUT
F
= I
IGURE
OUT
DD
* R
6. HCSL D
is HIGH.
I
L
OUT = 17mA
IC
RIVER
V
DD
13
C
IRCUIT AND
1-TO-21, DIFFERENTIAL CURRENT MODE 0.7V HCSL FANOUT BUFFER
T
ERMINATION
R
50Ω
L
V
OUT
©2010 Integrated Device Technology, Inc.