ICS85354AKLFT IDT, Integrated Device Technology Inc, ICS85354AKLFT Datasheet - Page 15

• Manufacturer Part Number: ICS85354AKLFT
• Description: IC MUX DUAL 2:1 1:2 16-VFQFPN
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: HiPerClockS™r
• Type: Multiplexerr

Specifications of ICS85354AKLFT

• Number Of Circuits: 2
• Ratio - Input:output: 2:1, 1:2
• Differential - Input:output: Yes/Yes
• Input: CML, LVDS, LVPECL
• Output: LVPECL
• Frequency - Max: 3.2GHz
• Voltage - Supply: 2.375 V ~ 3.465 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-VFQFN
• Frequency-max: 3.2GHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 85354AKLFT

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 5.
Figure 5. 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 – 1.005V)/50Ω] * 1.005V = 20mW
Pd_L = [(V
[(2V – 1.78V)/50Ω] * 1.78V = 7.83mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 27.83mW
IDT™ / ICS™ LVPECL/ECL MULTIPLEXER
o calculate worst case power dissipation into the load, use the following equations which assume a 50Ω load, and a termination voltage
ICS85354
DUAL 2:1 AND 1:2, DIFFERENTIAL-TO-LVPECL/ECL MULTIPLEXER
CC
•
•
– 2V.
For logic high, V
(V
For logic low, V
(V
OL_MAX
OH_MAX –
CC_MAX
CC_MAX
– (V
– V
– V
(V
OH_MAX
OL_MAX
CC_MAX
CC_MAX
OUT
OUT
Q1
= V
= V
) = 1.78V
) = 1.009V
V
– 2V))/R
– 2V))/R
CC
OL_MAX
OH_MAX
L
L
= V
] * (V
] * (V
= V
CC_MAX
CC_MAX
CC_MAX
CC_MAX
50Ω
RL
V
– 1.78V
CC
V
– 0.9V
– V
– V
OUT
- 2V
OL_MAX
OH_MAX
) = [(2V – (V
) = [(2V – (V
15
CC_MAX
CC_MAX
– V
– V
OL_MAX
OH_MAX
))/R
))/R
ICS85354AK REV. C NOVEMBER 04, 2008
L
L
] * (V
] * (V
CC_MAX
CC_MAX
– V
– V
OL_MAX
OH_MAX
) =
) =