ICS853014BGT IDT, Integrated Device Technology Inc, ICS853014BGT Datasheet - Page 15

• Manufacturer Part Number: ICS853014BGT
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Driverr

Specifications of ICS853014BGT

• Number Of Clock Inputs: 2
• Mode Of Operation: Differential
• Output Frequency: >2000MHz
• Output Logic Level: ECL/LVPECL
• Operating Supply Voltage (min): -2.375/2.375V
• Operating Supply Voltage (typ): -2.5/-3.3/3.3V
• Operating Supply Voltage (max): -3.8/3.8V
• Package Type: TSSOP
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Signal Type: CML/LVDS/LVPECL/SSTL
• Mounting: Surface Mount
• Pin Count: 20
• 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 – 0.935V)/50Ω] * 0.935V = 19.92mW
Pd_L = [(V
[(2V – 1.67V)/50Ω] * 1.67V = 11.02mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 30.94mW
IDT™ / ICS™ 2.5V, 3.3V LVPECL/ECL FANOUT BUFFER
o calculate worst case power dissipation into the load, use the following equations which assume a 50Ω load, and a termination voltage
ICS853014
LOW SKEW, 1-TO-5, DIFFERENTIAL-TO-2.5V, 3.3V LVPECL/ECL FANOUT BUFFER
CC
•
•
– 2V.
For logic high, V
(V
For logic low, V
(V
OL_MAX
OH_MAX
CC_MAX
CC_MAX
– (V
– (V
– V
– V
CC_MAX
OH_MAX
OL_MAX
CC_MAX
OUT
OUT
Q1
= V
= V
) = 1.67V
) = 0.935V
V
– 2V))/R
– 2V))/R
CC
OL_MAX
OH_MAX
L
L
= V
] * (V
] * (V
= V
CC_MAX
CC_MAX
CC_MAX
CC_MAX
50
RL
V
– 1.67V
CC
V
– 0.935V
– V
– V
OUT
- 2V
OL_MAX
OH_MAX
) = [(2V – (V
) = [(2V – (V
15
CC_MAX
CC_MAX
– V
– V
OL_MAX
OH_MAX
))/R
ICS853014BG REV. D FEBRUARY 25, 2009
))/R
L
L
] * (V
] * (V
CC_MAX
CC_MAX
– V
– V
OL_MAX
OH_MAX
) =
) =