ics8512061i Integrated Device Technology, ics8512061i Datasheet - Page 12

• Manufacturer Part Number: ics8512061i
• Description: Single Channel 0.7v Differential- To-lvttl Transceiver
• Manufacturer: Integrated Device Technology

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 2.
Figure 2. HCSL Driver Circuit and Termination
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 = 46.8mW
IDT™ / ICS™ TRANSCEIVER
R
475
ICS8512061I
SINGLE CHANNEL 0.7V DIFFERENTIAL-TO-LVTTL TRANSCEIVER
REF =
Ω
± 1%
= (V
= (3.6V – 17mA * 50
= (V
DD_MAX
DD_MAX
I
OUT = 17mA
IC
– V
– I
OUT
OUT
* R
) * I
Ω
) * 17mA
V
L
OUT
) * I
DD
, since V
OUT
OUT
DD
_
– I
MAX
OUT
.
* R
R
50Ω
L
L
V
OUT
12
ICS8512061AGI REV. B NOVEMBER 19, 2008