ICS853031AY IDT, Integrated Device Technology Inc, ICS853031AY Datasheet - Page 16

• Manufacturer Part Number: ICS853031AY
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Driverr

Specifications of ICS853031AY

• Number Of Clock Inputs: 2
• Mode Of Operation: Differential
• Output Frequency: >1600MHz
• Output Logic Level: ECL/LVPECL
• Operating Supply Voltage (min): -2.375/2.375V
• Operating Supply Voltage (typ): -2.5/-3.3/3.3V
• Operating Supply Voltage (max): -3.465/3.465V
• Package Type: LQFP
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 32
• Lead Free Status / Rohs Status: Not Compliant

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 8.
T
termination 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 – 0.935V)/50 ] * 0.935V = 19.92mW
Pd_L = [(V
[(2V – 1.67V)/50 ] * 1.67V = 11.2mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 30.94mW
IDT
o calculate worst case power dissipation into the load, use the following equations which assume a 50
ICS853031
LOW SKEW, 1-TO-9, DIFFERENTIAL-TO-2.5, 3.3V LVPECL/ECL FANOUT BUFFER
™
•
•
/ ICS
For logic high, V
(V
For logic low, V
(V
™
OL_MAX
1-TO-9, 2.5V, 3.3V LVPECL/ECL FANOUT BUFFER
CCO_MAX
CCO_MAX
OH_MAX
– (V
– (V
– V
– V
CCO_MAX
CCO_MAX
OH_MAX
OL_MAX
CCO
OUT
) = 1.67V
) = 0.935V
OUT
– 2V))/R
– 2V))/R
= V
– 2V.
= V
OL_MAX
OH_MAX
L
L
] * (V
= V
] * (V
= V
CCO_MAX
CCO_MAX
CCO_MAX
CCO_MAX
F
IGURE
– 1.67V
– V
– 0.935V
– V
8. LVPECL D
OL_MAX
OH_MAX
) = [(2V – (V
) = [(2V – (V
Q1
VCCO
RIVER
CCO_MAX
CCO_MAX
16
C
– V
– V
IRCUIT AND
OL_MAX
OH_MAX
)) /R
)) /R
RL
50
L
T
VCCO - 2V
L
] * (V
] * (V
ERMINATION
VOUT
CCO_MAX
CCO_MAX
– V
– V
OL_MAX
OH_MAX
ICS853031AY REV. C AUGUST 12, 2008
) =
) =
load, and a