ICS8534AY-01T IDT, Integrated Device Technology Inc, ICS8534AY-01T Datasheet - Page 15

• Manufacturer Part Number: ICS8534AY-01T
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Driverr

Specifications of ICS8534AY-01T

• Number Of Clock Inputs: 2
• Mode Of Operation: Differential
• Output Frequency: 500MHz
• Output Logic Level: LVPECL
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.465V
• Package Type: TQFP EP
• Operating Temp Range: 0C to 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 64
• Lead Free Status / RoHS Status: Not Compliant

3. Calculations and Equations.
The purpose of this section is to derive the power dissipated into the load.
LVPECL output driver circuit and termination are shown in Figure 7.
Figure 7. LVPECL Driver Circuit and Termination
T
of V
Pd_H is power dissipation when the output drives high.
Pd_L is the power dissipation when the output drives low.
Pd_H = [(V
[(2V – 0.9V)/50Ω] * 0.9V = 19.8mW
Pd_L = [(V
[(2V – 1.7V)/50Ω] * 1.7V = 10.2mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 30mW
IDT™ / ICS™ 3.3V LVPECL FANOUT BUFFER
o calculate worst case power dissipation into the load, use the following equations which assume a 50Ω load, and a termination voltage
ICS8534-01
LOW SKEW, 1-TO-22 DIFFERENTIAL-TO-3.3V LVPECL FANOUT BUFFER
CCO
•
•
– 2V.
For logic high, V
(V
For logic low, V
(V
OL_MAX
OH_MAX
CCO_MAX
CCO_MAX
– (V
– (V
– V
– V
CCO_MAX
CCO_MAX
OUT
OH_MAX
OL_MAX
OUT
= V
V
= V
Q1
CCO
) = 1.7V
) = 0.9V
– 2V))/R
OL_MAX
– 2V))/R
OH_MAX
= V
L
L
] * (V
= V
] * (V
CCO_MAX
CCO_MAX
CCO_MAX
CCO_MAX
RL
50Ω
V
CCO
– 1.7V
– 0.9V
-
V
– V
2V
OUT
– V
OL_MAX
OH_MAX
) = [(2V – (V
15
) = [(2V – (V
CCO_MAX
CCO_MAX
– V
– V
OL_MAX
OH_MAX
ICS8534AY-01 REV. A OCTOBER 27, 2008
))/R
))/R
L
] * (V
L
] * (V
CCO_MAX
CCO_MAX
– V
– V
OL_MAX
OH_MAX
) =
) =