ICS813252CKI-02LF IDT, Integrated Device Technology Inc, ICS813252CKI-02LF Datasheet - Page 17

• Manufacturer Part Number: ICS813252CKI-02LF
• Description: IC MULTIPLIER VCXO PLL 32-VFQFPN
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: HiPerClockS™, FemtoClock®r
• Type: Frequency Translator, Jitter Attenuator, Multiplexer , Voltage Controlled Crystal Oscillator (VCXO)r

Specifications of ICS813252CKI-02LF

• Pll: Yes
• Input: HCSL, LVDS, LVHSTL, LVPECL, SSTL
• Output: LVPECL
• Number Of Circuits: 1
• Ratio - Input:output: 3:2
• Differential - Input:output: Yes/Yes
• Frequency - Max: 312.5MHz
• Divider/multiplier: No/Yes
• Voltage - Supply: 3.135 V ~ 3.465 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-VFQFN
• Frequency-max: 312.5MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 813252CKI-02LF

ICS813252I-02 Data Sheet
ICS813252CKI-02 REVISION A AUGUST 25, 2010
3. Calculations and Equations.
The purpose of this section is to calculate power dissipation on the LVPECL output pair.
LVPECL output driver circuit and termination are shown in Figure 7.
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)/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
o calculate worst case power dissipation into the load, use the following equations which assume a 50Ω load, and a termination
•
•
For logic high, V
(V
For logic low, V
(V
OL_MAX
CCO_MAX
CCO_MAX
OH_MAX
CCO
– 2V.
– (V
– (V
– V
– V
CCO_MAX
CCO_MAX
OH_MAX
OL_MAX
OUT
) = 1.7V
) = 0.9V
- 2V))/R
OUT
– 2V))/R
= V
= V
OL_MAX
OH_MAX
L
] * (V
L
= V
] * (V
= V
CCO_MAX
CCO_MAX
CCO_MAX
F
CCO_MAX
IGURE
– 1.7V
– V
– V
– 0.9V
OL_MAX
7. LVPECL D
OH_MAX
) = [(2V – (V
) = [(2V – (V
RIVER
CCO _MAX
V
CCO _MAX
Q1
CC
17
– V
C
– V
IRCUIT AND
OL_MAX
OH_MAX
)) /R
)) /R
L
] * (V
L
VCXO JITTER ATTENUATOR & FEMTOCLOCK
T
] * (V
RL
V
50
ERMINATION
CC
CCO_MAX
- 2V
CCO_MAX
V
OUT
– V
– V
OL_MAX
OH_MAX
) =
) =
©2010 Integrated Device Technology, Inc.
®
MULTIPLIER