ICS85304AG-01LFT IDT, Integrated Device Technology Inc, ICS85304AG-01LFT Datasheet - Page 11
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ICS85304AG-01LFT
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
Datasheet
1.ICS85304AG-01LFT.pdf
(15 pages)
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
) =
) =