ICS8535AG-01 IDT, Integrated Device Technology Inc, ICS8535AG-01 Datasheet - Page 11

• Manufacturer Part Number: ICS8535AG-01
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Driverr

Specifications of ICS8535AG-01

• Number Of Clock Inputs: 2
• Mode Of Operation: Single-Ended
• Output Frequency: 266MHz
• 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
• Signal Type: LVCMOS/LVTTL
• Mounting: Surface Mount
• Pin Count: 20
• 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 4.
T
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 - 0.9V)/50 ] * 0.9V = 19.8mW
Pd_L = [(V
[(2V - 1.7V)/50 ] * 1.7V = 10.2mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 30mW
IDT
o calculate worst case power dissipation into the load, use the following equations which assume a 50
ICS8535-01
LOW SKEW, 1-to-4 LVCMOS/LVTTL-TO-3.3V LVPECL FANOUT BUFFER
™
•
•
/ ICS
For logic high, V
(V
For logic low, V
(V
™
OL_MAX
CC_MAX
CC_MAX
3.3V LVPECL FANOUT BUFFER
OH_MAX
CC
- 2V.
– (V
– (V
- V
- V
OH_MAX
OL_MAX
CC_MAX
CC_MAX
) = 1.7V
) = 0.9V
- 2V))/R
OUT
- 2V))/R
OUT
= V
= V
OL_MAX
OH_MAX
L
L
] * (V
] * (V
= V
= V
CC_MAX
CC_MAX
CC_MAX
F
CC_MAX
IGURE
- V
- V
– 1.7V
OL_MAX
– 0.9V
OH_MAX
4. LVPECL D
) = [(2V - (V
) = [(2V - (V
CC_MAX
CC_MAX
RIVER
V
Q1
CC
- V
11
- V
OL_MAX
C
OH_MAX
IRCUIT AND
)) /R
)) /R
L
] * (V
L
] * (V
T
RL
CC_MAX
V
50
CC_MAX
ERMINATION
CC
- 2V
- V
V
- V
OUT
OL_MAX
OH_MAX
) =
) =
ICS8535AG-01 REV. F OCTOBER 27, 2008
load, and a termination