85314BGI-01T IDT, Integrated Device Technology Inc, 85314BGI-01T Datasheet - Page 14

• Manufacturer Part Number: 85314BGI-01T
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Driverr

Specifications of 85314BGI-01T

• Number Of Clock Inputs: 2
• Output Frequency: 700MHz
• Output Logic Level: LVPECL
• Operating Supply Voltage (min): 2.375V
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.8V
• Package Type: TSSOP
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 20
• Lead Free Status / RoHS Status: Not Compliant

3. Calculations and Equations.
LVPECL output driver circuit and termination are shown in Figure 6.
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 - 1V)/50 ] * 1V = 20.0mW
Pd_L = [(V
[(2V - 1.7V)/50 ] * 1.7V = 10.2mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 30.2mW
85314BGI-01
o calculate worst case power dissipation into the load, use the following equations which assume a 50 load, and a termination
•
•
For logic high, V
(V
For logic low, V
(V
OL_MAX
OH_MAX
CC
CC_MAX
CC_MAX
- 2V.
– (V
– (V
- V
- V
OH_MAX
OL_MAX
CC_MAX
CC_MAX
OUT
OUT
) = 1.7V
) = 1.0V
- 2V))/R
- 2V))/R
= V
= V
OL_MAX
OH_MAX
L
F
L
] * (V
] * (V
IGURE
= V
= V
CC_MAX
CC_MAX
CC_MAX
CC_MAX
6. LVPECL D
- V
– 1.7V
- V
– 1.0V
OL_MAX
D
OH_MAX
IFFERENTIAL
) = [(2V - (V
) = [(2V - (V
www.idt.com
RIVER
V
Q1
CC
14
C
CC_MAX
CC_MAX
IRCUIT AND
-
TO
- V
-2.5V/3.3V LVPECL F
- V
OL_MAX
OH_MAX
RL
T
V
50
ERMINATION
)) /R
CC
)) /R
- 2V
V
L
OUT
] * (V
L
] * (V
CC_MAX
CC_MAX
- V
- V
OL_MAX
ICS85314I-01
OH_MAX
L
OW
) =
) =
ANOUT
S
KEW
REV. F JULY 25, 2010
, 1-
B
UFFER
TO
-5