ICS84320AY-01LN IDT, Integrated Device Technology Inc, ICS84320AY-01LN Datasheet - Page 10

• 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

C
A crystal can be characterized for either series or parallel mode
operation. The ICS84320-01 has a built-in crystal oscillator circuit.
This interface can accept either a series or parallel crystal without
additional components and generate frequencies with accuracy
LVCMOS
The XTAL_IN input can accept a single-ended LVCMOS signal
through an AC coupling capacitor. A general interface diagram
is shown in Figure 4. The XTAL_OUT pin can be left floating.
The input edge rate can be as slow as 10ns. For LVCMOS
inputs, it is recommended that the amplitude be reduced from
full swing to half swing in order to prevent signal interference
with the power rail and to reduce noise. This configuration
requires that the output impedance of the driver (Ro) plus the
84320AY-01
RYSTAL
I
NPUT
TO
XTAL I
I
NTERFACE
18pF Parallel Crystal
F
NTERFACE
IGURE
V
DD
Ro
4. G
ENERAL
X1
D
F
IAGRAM FOR
Rs
IGURE
Zo = Ro + Rs
3. C
www.idt.com
RYSTAL
C1
18p
C2
22p
LVCMOS D
50Ω
25
24
10
I
NPU
suitable for most applications. Additional accuracy can be
achieved by adding two small capacitors C1 and C2 as shown in
Figure 3 .
series resistance (Rs) equals the transmission line
impedance. In addition, matched termination at the crystal
input will attenuate the signal in half. This can be done in one
of two ways. First, R1 and R2 in parallel should equal the
transmission line impedance. For most 50Ω applications, R1
and R2 can be 100Ω. This can also be accomplished by
removing R1 and making R2 50Ω.
XTAL1
XTAL2
780MH
t I
V
DD
NTERFACE
RIVER TO
R1
R2
0.1µf
LVPECL F
Z
XTAL I
, C
ICS84320
RYSTAL
XTAL_IN
XTAL_OUT
NPUT
I
NTERFACE
REQUENCY
-
TO
ICS84320-01
-3.3V D
S
IFFERENTIAL
YNTHESIZER
REV. D JULY 26, 2010