ICS8430AY-61 IDT, Integrated Device Technology Inc, ICS8430AY-61 Datasheet - Page 16

• Manufacturer Part Number: ICS8430AY-61
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: PLL Frequency Synthesizerr

Specifications of ICS8430AY-61

• Number Of Elements: 1
• Supply Current: 155mA
• Pll Input Freq (min): 14MHz
• Pll Input Freq (max): 27MHz
• Operating Supply Voltage (typ): 3.3V
• Operating Temp Range: 0C to 70C
• Package Type: LQFP
• Output Frequency Range: 20.83 to 500MHz
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (max): 3.465V
• Operating Temperature Classification: Commercial
• 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
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
8430AY-61
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
OH_MAX
CCO_MAX
CCO_MAX
CCO
- 2V.
– (V
– (V
- V
- V
CCO_MAX
OH_MAX
OL_MAX
CCO_MAX
OUT
OUT
) = 1.7V
) = 0.9V
- 2V))/R
= V
- 2V))/R
= V
OL_MAX
OH_MAX
L
L
] * (V
= V
] * (V
F
= V
IGURE
CCO_MAX
CCO_MAX
CCO_MAX
CCO_MAX
8. LVPECL D
– 1.7V
- V
– 0.9V
- V
OL_MAX
OH_MAX
) = [(2V - (V
) = [(2V - (V
www.idt.com
500MH
RIVER
V
Q1
CCO
16
C
IRCUIT AND
CCO_MAX
CCO_MAX
Z
, C
- V
- V
RYSTAL
T
LVPECL F
OL_MAX
ERMINATION
OH_MAX
R L
V
50
CCO
)) /R
V
- 2V
)) /R
OUT
-
TO
L
] * (V
L
] * (V
-3.3V, 2.5V D
CCO_MAX
CCO_MAX
REQUENCY
- V
- V
ICS8430-61
OL_MAX
OH_MAX
) =
) =
S
IFFERENTIAL
YNTHESIZER
REV. D JULY 27, 2010