ICS85304AG-01LFT IDT, Integrated Device Technology Inc, ICS85304AG-01LFT Datasheet - Page 11

• Manufacturer Part Number: ICS85304AG-01LFT
• Description: IC FANOUT BUFFER 1-5 20-TSSOP
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Fanout Buffer (Distribution), Multiplexerr
• Series: HiPerClockS™r

Specifications of ICS85304AG-01LFT

• Number Of Circuits: 1
• Ratio - Input:output: 2:5
• Differential - Input:output: Yes/Yes
• Input: HCSL, LVDS, LVHSTL, LVPECL, SSTL
• Output: LVPECL
• Frequency - Max: 650MHz
• Voltage - Supply: 3.135 V ~ 3.465 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP
• Frequency-max: 650MHz
• Number Of Clock Inputs: 2
• Mode Of Operation: Differential
• Output Frequency: 650MHz
• Output Logic Level: LVPECL
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.465V
• Package Type: TSSOP
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 20
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 85304AG-01LFT

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 4.
Figure 4. 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 – 1.0V)/50Ω] * 1.0V = 20mW
Pd_L = [(V
[(2V – 1.7V)/50Ω] * 1.7V = 10.2mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 30.2mW
IDT™ / ICS™ 3.3V LVPECL FANOUT BUFFER
o calculate worst case power dissipation into the load, use the following equations which assume a 50Ω load, and a termination voltage
ICS85304-01
LOW SKEW, 1-TO-5 DIFFERENTIAL-TO- 3.3V LVPECL FANOUT BUFFER
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
= V
V
= V
) = 1.7V
) = 1.0V
Q1
CC
– 2V))/R
– 2V))/R
OL_MAX
OH_MAX
L
= V
L
] * (V
] * (V
= V
CC_MAX
CC_MAX
CC_MAX
CC_MAX
RL
50
V
– 1.7V
CC
– 1.0V
– V
– V
-
2V
V
OUT
OL_MAX
OH_MAX
) = [(2V – (V
) = [(2V – (V
11
CC_MAX
CC_MAX
– V
– V
OL_MAX
OH_MAX
))/R
))/R
L
] * (V
L
] * (V
ICS85304AG-01 REV. E JULY 8, 2008
CC_MAX
CC_MAX
– V
– V
OL_MAX
OH_MAX
) =
) =