ICS84320AY-01LN IDT, Integrated Device Technology Inc, ICS84320AY-01LN Datasheet - Page 16

• Manufacturer Part Number: ICS84320AY-01LN
• Description: IC SYNTHESIZER GP LVPECL 32-LQFP
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: HiPerClockS™r
• Type: Frequency Synthesizerr

Specifications of ICS84320AY-01LN

• Pll: Yes with Bypass
• Input: Crystal
• Output: LVPECL
• Number Of Circuits: 1
• Ratio - Input:output: 1:2
• Differential - Input:output: No/Yes
• Frequency - Max: 780MHz
• Divider/multiplier: Yes/No
• Voltage - Supply: 3.135 V ~ 3.465 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 32-LQFP
• Frequency-max: 780MHz
• Number Of Elements: 1
• Supply Current: 155mA
• Pll Input Freq (min): 14MHz
• Pll Input Freq (max): 40MHz
• Operating Supply Voltage (typ): 3.3V
• Operating Temp Range: 0C to 70C
• Package Type: TQFP
• Output Frequency Range: 77.5 to 780MHz
• Operating Supply Voltage (min): 2.915/3.135V
• Operating Supply Voltage (max): 3.465V
• Operating Temperature Classification: Commercial
• Pin Count: 32
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 800-1140; 84320AY-01LN

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
84320AY-01
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
F
= V
] * (V
IGURE
= V
CCO_MAX
CCO_MAX
CCO_MAX
CCO_MAX
8. LVPECL D
– 1.7V
- V
- V
– 0.9V
OL_MAX
OH_MAX
) = [(2V - (V
) = [(2V - (V
www.idt.com
RIVER
V
Q1
CCO
16
C
IRCUIT AND
780MH
CCO_MAX
CCO_MAX
- V
- V
T
OL_MAX
LVPECL F
OH_MAX
ERMINATION
Z
R L
V
50
, C
CCO
)) /R
V
- 2V
)) /R
OUT
RYSTAL
L
] * (V
L
] * (V
CCO_MAX
CCO_MAX
REQUENCY
-
TO
ICS84320-01
-3.3V D
- V
- V
OL_MAX
OH_MAX
) =
) =
S
IFFERENTIAL
YNTHESIZER
REV. D JULY 26, 2010