ICS85311AMLF IDT, Integrated Device Technology Inc, ICS85311AMLF Datasheet - Page 12

• Manufacturer Part Number: ICS85311AMLF
• Description: IC FANOUT BUFF LVPECL/ECL 8-SOIC
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: HiPerClockS™r
• Type: Fanout Buffer (Distribution)r

Specifications of ICS85311AMLF

• Number Of Circuits: 1
• Ratio - Input:output: 1:2
• Differential - Input:output: Yes/Yes
• Input: HCSL, LVDS, LVHSTL, LVPECL, SSTL
• Output: ECL, LVPECL
• Frequency - Max: 1GHz
• Voltage - Supply: 2.375 V ~ 3.465 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC
• Frequency-max: 1GHz
• Number Of Outputs: 4
• Operating Supply Voltage (max): -3.465/3.465V
• Operating Temp Range: 0C to 70C
• Propagation Delay Time: 1.4ns
• Operating Supply Voltage (min): -2.375/2.375V
• Mounting: Surface Mount
• Pin Count: 8
• Operating Supply Voltage (typ): -2.5/-3.3/2.5/3.3V
• Package Type: SOIC N
• Duty Cycle: 52%
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 800-1166; 800-1166-5; 800-1166; 85311AMLF

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 – 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
IDT™ / ICS™ LVPECL/ECL FANOUT BUFFER
o calculate worst case power dissipation into the load, use the following equations which assume a 50Ω load, and a termination voltage
ICS85311
LOW SKEW, 1-TO-2, DIFFERENTIAL-TO-LVPECL/ECLFANOUT 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
Q1
= V
= V
) = 1.7V
) = 0.9V
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
– 1.7V
CC
V
– 0.9V
– V
– V
OUT
- 2V
OL_MAX
OH_MAX
) = [(2V – (V
) = [(2V – (V
12
CC_MAX
CC_MAX
– V
– V
OL_MAX
OH_MAX
))/R
))/R
ICS85311AM REV. D OCTOBER 22, 2008
L
L
] * (V
] * (V
CC_MAX
CC_MAX
– V
– V
OL_MAX
OH_MAX
) =
) =