ICS8534AY-01LF IDT, Integrated Device Technology Inc, ICS8534AY-01LF Datasheet - Page 16

• Manufacturer Part Number: ICS8534AY-01LF
• Description: IC FANOUT BUFFER LVPECL 64-TQFP
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: HiPerClockS™r
• Type: Fanout Buffer (Distribution), Multiplexerr

Specifications of ICS8534AY-01LF

• Number Of Circuits: 1
• Ratio - Input:output: 2:22
• Differential - Input:output: Yes/Yes
• Input: CML, HCSL, LVDS, LVHSTL, LVPECL, SSTL
• Output: LVPECL
• Frequency - Max: 500MHz
• Voltage - Supply: 3.135 V ~ 3.465 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-TQFP, 64-VQFP
• Frequency-max: 500MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 800-1173; 8534AY-01LF

ICS8534-01 Data Sheet
3. Calculations and Equations.
The purpose of this section is to calculate the power dissipation for the LVPECL output pair.
LVPECL output driver circuit and termination are shown in Figure 7.
Figure 7. LVPECL Driver Circuit and Termination
T
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
ICS8534AY-01 REVISION B MARCH 28, 2011
o calculate worst case power dissipation into the load, use the following equations which assume a 50Ω load, and a termination voltage of
CCO
•
•
– 2V.
For logic high, V
(V
For logic low, V
(V
OL_MAX
OH_MAX
CCO_MAX
CCO_MAX
– (V
– (V
– V
– V
CCO_MAX
CCO_MAX
OH_MAX
OUT
OL_MAX
OUT
= V
V
= V
Q1
CCO
) = 1.7V
) = 0.9V
OL_MAX
OH_MAX
– 2V))/R
– 2V))/R
= V
= V
L
L
] * (V
] * (V
CCO_MAX
CCO_MAX
CCO_MAX
CCO_MAX
RL
50Ω
V
CCO
– 1.7V
– 0.9V
-
V
2V
OUT
– V
– V
OH_MAX
OL_MAX
) = [(2V – (V
) = [(2V – (V
16
LOW SKEW, 1-TO-22 DIFFERENTIAL-TO-3.3V LVPECL FANOUT BUFFER
CCO_MAX
CCO_MAX
– V
– V
OL_MAX
OH_MAX
))/R
))/R
L
L
] * (V
] * (V
©2011 Integrated Device Technology, Inc.
CCO_MAX
CCO_MAX
– V
– V
OL_MAX
OH_MAX
) =
) =