ICS853S12AKILF IDT, Integrated Device Technology Inc, ICS853S12AKILF Datasheet - Page 13

• Manufacturer Part Number: ICS853S12AKILF
• Description: IC FANOUT BUFFER LVPECL 32-VFQFN
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: HiPerClockS™r
• Type: Fanout Buffer (Distribution)r

Specifications of ICS853S12AKILF

• Number Of Circuits: 1
• Ratio - Input:output: 1:12
• Differential - Input:output: Yes/Yes
• Input: CML, LVPECL, SSTL
• Output: LVPECL
• Frequency - Max: 1.5GHz
• Voltage - Supply: 2.375 V ~ 3.465 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-VFQFN
• Frequency-max: 1.5GHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 800-1177; 853S12AKILF

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 - 0.8V)/50Ω] * 0.8V = 19.2mW
Pd_L = [(V
[(2V - 1.6V)/50Ω] * 1.6V = 12.8mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 32mW
IDT
o calculate worst case power dissipation into the load, use the following equations which assume a 50Ω load, and a termination
ICS853S12I
LOW SKEW, 1-TO-12, DIFFERENTIAL-TO-3.3V, 2.5V LVPECL FANOUT BUFFER
™
•
•
/ ICS
For logic high, V
(V
For logic low, V
(V
™
OL_MAX
LVPECL FANOUT BUFFER
CC_MAX
CC_MAX
OH_MAX
CC
- 2V.
– (V
– (V
- V
- V
OL_MAX
OH_MAX
CC_MAX
CC_MAX
) = 1.6V
) = 0.8V
- 2V))/R
OUT
- 2V))/R
OUT
= V
= V
OL_MAX
OH_MAX
L
L
] * (V
] * (V
F
= V
IGURE
= V
CC_MAX
CC_MAX
CC_MAX
CC_MAX
- V
6. LVPECL D
- V
– 1.6V
– 0.8V
OL_MAX
OH_MAX
) = [(2V - (V
) = [(2V - (V
Q1
RIVER
V
CC
CC_MAX
CC_MAX
C
IRCUIT AND
- V
13
- V
OL_MAX
OH_MAX
)) /R
)) /R
T
L
RL
50Ω
] * (V
L
ERMINATION
] * (V
V
CC
V
OUT
- 2V
CC_MAX
CC_MAX
- V
- V
OL_MAX
OH_MAX
) =
) =
ICS853S12AKI REV. A MAY 21, 2008