ICS85301AKLFT IDT, Integrated Device Technology Inc, ICS85301AKLFT Datasheet - Page 14

• Manufacturer Part Number: ICS85301AKLFT
• Description: IC MUX 2:1 DIFF-LVPECL 16-VFQFPN
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: HiPerClockS™r
• Type: Multiplexerr

Specifications of ICS85301AKLFT

• Number Of Circuits: 1
• Ratio - Input:output: 2:1
• Differential - Input:output: Yes/Yes
• Input: CML, LVDS, LVPECL
• Output: LVPECL
• Frequency - Max: 3GHz
• Voltage - Supply: 2.375 V ~ 3.465 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-VFQFN
• Frequency-max: 3GHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 85301AKLFT

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.
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 - 0.93V)/50 ] * 0.93V = 19.9mW
Pd_L = [(V
[(2V - 1.62V)/50 ] * 1.62V = 12.3mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 32.2mW
IDT
o calculate worst case power dissipation into the load, use the following equations which assume a 50
ICS85301
2:1, DIFFERENTIAL-TO-LVPECL MULTIPLEXER
™
•
•
/ ICS
For logic high, V
(V
For logic low, V
(V
™
OL_MAX
2:1, LVPECL MULTIPLEXER
CC_MAX
CC_MAX
OH_MAX
CC
- 2V.
– (V
– (V
- V
- V
OH_MAX
OL_MAX
CC_MAX
CC_MAX
) = 1.62V
) = 0.93
- 2V))/R
OUT
- 2V))/R
OUT
= V
= V
OL_MAX
OH_MAX
L
L
] * (V
] * (V
= V
= V
CC_MAX
CC_MAX
CC_MAX
CC_MAX
F
IGURE
- V
- V
– 1.62V
OL_MAX
– 0.93V
OH_MAX
7. LVPECL D
) = [(2V - (V
) = [(2V - (V
CC_MAX
CC_MAX
Q1
RIVER
VCC
- V
14
- V
OL_MAX
OH_MAX
C
IRCUIT AND
)) /R
)) /R
L
] * (V
L
] * (V
CC_MAX
RL
50
T
CC_MAX
VCC - 2V
ERMINATION
- V
- V
VOUT
OL_MAX
OH_MAX
) =
) =
ICS85301 REV. B DECEMBER 22, 2006
load, and a termination