8531AY-01LF IDT, Integrated Device Technology Inc, 8531AY-01LF Datasheet - Page 13

• Manufacturer Part Number: 8531AY-01LF
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Driverr

Specifications of 8531AY-01LF

• 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
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 32
• Lead Free Status / RoHS Status: 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 6.
T
voltage 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
o calculate worst case power dissipation into the load, use the following equations which assume a 50Ω load, and a termination
ICS8531-01
LOW SKEW, 1-TO-9, DIFFERENTIAL-TO-3.3V LVPECL FANOUT BUFFER
™
•
•
/ ICS
For logic high, V
(V
For logic low, V
(V
™
OL_MAX
CCO_MAX
CCO_MAX
1-TO-9, 3.3V LVPECL FANOUT BUFFER
OH_MAX
CCO
- 2V.
– (V
– (V
- V
- V
CCO_MAX
OH_MAX
OL_MAX
CCO_MAX
) = 1.7V
) = 0.9V
OUT
- 2V))/R
OUT
- 2V))/R
= V
= V
OL_MAX
OH_MAX
L
L
] * (V
] * (V
= V
F
= V
IGURE
CCO_MAX
CCO_MAX
CCO_MAX
CCO_MAX
6. LVPECL D
- V
– 1.7V
- V
– 0.9V
OL_MAX
OH_MAX
) = [(2V - (V
) = [(2V - (V
RIVER
V
Q1
CCO
CCO_MAX
CCO_MAX
C
IRCUIT AND
13
- V
- V
OL_MAX
OH_MAX
)) /R
)) /R
T
R L
V
ERMINATION
50
L
CCO
] * (V
L
] * (V
V
- 2V
OUT
CCO_MAX
CCO_MAX
- V
- V
OL_MAX
OH_MAX
) =
) =
ICS8531AY-01 REV. F APRIL 11, 2007