ICS8761CY IDT, Integrated Device Technology Inc, ICS8761CY Datasheet - Page 9

• Manufacturer Part Number: ICS8761CY
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Zero Delay PLL Clock Generatorr

Specifications of ICS8761CY

• Number Of Elements: 1
• Supply Current: 175mA
• Pll Input Freq (min): 10MHz
• Pll Input Freq (max): 83.33MHz
• Operating Supply Voltage (typ): 3.3V
• Operating Temp Range: 0C to 85C
• Package Type: LQFP
• Output Frequency Range: Up to 166.67MHz
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (max): 3.465V
• Operating Temperature Classification: Commercial
• Pin Count: 64
• Lead Free Status / Rohs Status: Not Compliant

C
The ICS8761 crystal interface is shown in Figure 2. While
layout the PC Board, it is recommended to provide C1 and
C2 spare footprints for frequency fine tuning. For an 18pF
8761CY
As in any high speed analog circuitry, the power supply pins
are vulnerable to random noise. The ICS8761 provides
separate power supplies to isolate any high switching
noise from the outputs to the internal PLL. V
V
plane through vias, and bypass capacitors should be
used for each pin. To achieve optimum jitter performance,
power supply isolation is required. Figure 1 illustrates how
a ferrite bead along with a 10µF and a .01μF bypass
capacitor should be connected to each V
P
DDOx
RYSTAL
OWER
should be individually connected to the power supply
S
I
UPPLY
NPUT
I
F
NTERFACE
ILTERING
18pF Parallel Cry stal
T
ECHNIQUES
A
X1
DDA
PPLICATION
F
.
IGURE
DD
, V
2. C
DDA
, and
www.idt.com
RYSTAL
C1
SPARE
C2
SPARE
9
I
NFORMATION
parallel resonant crystal, the C1 and C2 are expected to be
~10pF and ~5pF respectively.
XTAL2
XTAL1
I
NPUT
I
NTERFACE
F
IGURE
PCI / PCI-X C
1. P
V
V
DDA
DD
L
OWER
OW
.01μF
.01μF
S
V
UPPLY
OLTAGE
3.3V
LOCK
10 μF
F
ILTERING
ICS8761
, L
G
REV. E JULY 26, 2010
OW
ENERATOR
S
KEW
,