ICS87322BYIT IDT, Integrated Device Technology Inc, ICS87322BYIT Datasheet - Page 11

• Manufacturer Part Number: ICS87322BYIT
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Dividerr

Specifications of ICS87322BYIT

• Number Of Clock Inputs: 2
• Mode Of Operation: Differential
• Output Frequency: 750MHz
• Output Logic Level: ECL/LVPECL
• Operating Supply Voltage (min): -3/3V
• Operating Supply Voltage (typ): -3.3/3.3V
• Operating Supply Voltage (max): -3.8/3.8V
• Package Type: LQFP
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Signal Type: CML/LVDS/LVPECL/SSTL
• Mounting: Surface Mount
• Pin Count: 52
• 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 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
87322BYI
o calculate worst case power dissipation into the load, use the following equations which assume a 50Ω load, and a termination
•
•
For logic high, V
(V
For logic low, V
(V
OL_MAX
OH_MAX
CCO_MAX
CCO_MAX
CCO
- 2V.
– (V
– (V
- V
- V
CCO_MAX
CCO_MAX
OH_MAX
OL_MAX
OUT
OUT
) = 1.7V
) = 0.9V
= V
- 2V))/R
- 2V))/R
= V
OL_MAX
OH_MAX
L
L
] * (V
] * (V
= V
= V
F
IGURE
CCO_MAX
CCO_MAX
CCO_MAX
CCO_MAX
6. LVPECL D
– 1.7V
- V
- V
– 0.9V
OL_MAX
OH_MAX
) = [(2V - (V
) = [(2V - (V
www.idt.com
RIVER
V
Q1
CCO
11
C
IRCUIT AND
CCO_MAX
CCO_MAX
3.3V LVPECL/ECL C
- V
T
- V
ERMINATION
OL_MAX
OH_MAX
R L
V
50
CCO
)) /R
V
- 2V
)) /R
OUT
L
L
] * (V
] * (V
CCO_MAX
CCO_MAX
- V
L
- V
ICS87322BI
OW
OL_MAX
OH_MAX
LOCK
S
) =
) =
REV. C OCTOBER 13, 2010
KEW
G
ENERATOR
, ÷1/÷2,