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PDF ICS8430-62 Data sheet ( Hoja de datos )
| Número de pieza | ICS8430-62 | |
| Descripción | 2.5V Differential LVPECL Frequency Synthesizer | |
| Fabricantes | Integrated Device Technology | |
| Logotipo |  |
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500MHz, Crystal-to-3.3V, 2.5V
ICS8430-62
Differential LVPECL Frequency Synthesizer
DATASHEET
General Description
The ICS8430-62 is a general purpose, dual output
ICS Crystal-to-3.3V, 2.5V Differential LVPECL High
HiPerClockS™ Frequency Synthesizer and a member of the
HiPerClockS™ family of High Performance Clock
Solutions from IDT. The ICS8430-62 has a selectable
REF_CLK or crystal inputs. The VCO operates at a frequency range
of 250MHz to 500MHz. The VCO frequency is programmed in steps
equal to the value of the input reference or crystal frequency. The
VCO and output frequency can be programmed using the serial or
parallel interfaces to the configuration logic. Frequency steps as
swmwawll.aDsa1taMSHhezecta4Un.bceomachieved using a 16MHz crystal or REF_CLK.
Block Diagram
Features
• Dual differential 3.3V or 2.5V LVPECL outputs
• Selectable crystal oscillator interface or LVCMOS/LVTTL
REF_CLK
• Output frequency range: 20.83MHz to 500MHz
• Crystal input frequency range: 14MHz to 27MHz
• VCO range: 250MHz to 500MHz
• Parallel or serial interface for programming counter
and output dividers
• RMS period jitter: 5ps (maximum)
• Cycle-to-cycle jitter: 35ps (maximum)
• Full 3.3V or 3.3V core/2.5V output supply
• 0°C to 70°C ambient operating temperature
• Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages
VCO_SEL Pullup
XTAL_SEL Pullup
REF_CLK Pulldown
0
XTAL_IN
XTAL_OUT
OSC 1
÷16
MR Pulldown
PLL
Phase Detector
VCO
÷M
÷1
÷1.5
÷2
÷3
÷4
÷6
0
÷8
÷12
1
S_LOAD Pulldown
S_DATA Pulldown
S_CLOCK Pulldown
nP_LOAD Pulldown
M0:M8
N0:N2
9
3
Configuration
Interface Logic
Pin Assignment
FOUT0
nFOUT0
FOUT1
nFOUT1
TEST
32 31 30 29 28 27 26 25
M5 1
24 XTAL_OUT
M6 2
23 REF_CLK
M7 3
22 XTAL_SEL
M8 4
21 VCCA
N0 5
20 S_LOAD
N1 6
19 S_DATA
N2 7
18 S_CLOCK
VEE 8
17 MR
9 10 11 12 13 14 15 16
ICS8430-62
32 Lead LQFP
7mm x 7mm x 1.4mm package body
Y Package
Top View
ICS8430AY-62 REVISION A JULY 2, 2009
1
©2009 Integrated Device Technology, Inc.
1 page  
ICS8430-62 Datasheet
500MHz CRYSTAL-TO-3.3V, 2.5V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
Table 3C. Programmable Output Divider Function Table
Inputs
N2 N1 N0
000
001
010
011
100
101
110
1
www.DataSheet4U.com
1
1
N Divider Value
1
1.5
2
3
4
6
8
12
Output Frequency (MHz)
Minimum
Maximum
250 500
166.66
333.33
125 250
83.33
166.66
62.5 125
41.66
83.33
31.25
62.5
20.83
41.66
Absolute Maximum Ratings
NOTE: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device.
These ratings are stress specifications only. Functional operation of product at these conditions or any conditions beyond
those listed in the DC Characteristics or AC Characteristics is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect product reliability.
Item
Supply Voltage, VCC
Inputs, VI
Outputs, IO
Continuous Current
Surge Current
Package Thermal Impedance, θJA
Storage Temperature, TSTG
Rating
4.6V
-0.5V to VCC+ 0.5V
50mA
100mA
65.7°C/W (0 mps)
-65°C to 150°C
DC Electrical Characteristics
Table 4A. Power Supply DC Characteristics, VCC = 3.3V±5%, VCCO = 3.3V±5% or 2.5V±5%, TA = 0°C to 70°C
Symbol Parameter
Test Conditions
Minimum
Typical Maximum
VCC
VCCA
VCCO
Core Supply Voltage
Analog Supply Voltage
Output Supply Voltage
3.135
VCC – 0.14
3.135
2.375
3.3
3.3
3.3
2.5
3.465
VCC
3.465
2.625
IEE
ICCA
Power Supply Current
Analog Supply Current
130
14
Units
V
V
V
V
mA
mA
ICS8430AY-62 REVISION A JULY 2, 2009
5
©2009 Integrated Device Technology, Inc.
5 Page 
ICS8430-62 Datasheet
500MHz CRYSTAL-TO-3.3V, 2.5V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
Parameter Measurement Information, continued
nFOUTx
20%
FOUTx
80%
tR
Owuwtwp.uDtatRaiSshee/eFta4Ull.cToimme
80%
tF
VSW I N G
20%
Application Information
Power Supply Filtering Technique
As in any high speed analog circuitry, the power supply pins are
vulnerable to random noise. To achieve optimum jitter performance,
power supply isolation is required. The ICS8430-62 provides
separate power supplies to isolate any high frequency switching
noise from the outputs to the internal PLL. VCC, VCCA and VCCO
should be individually connected to the power supply plane through
vias, and 0.01µF bypass capacitors should be used for each pin.
Figure 2 illustrates this for a generic VCC pin and also shows that
VCCA requires that an additional 10Ω resistor along with a 10µF
bypass capacitor be connected to the VCCA pin. The 10Ω resistor can
also be replaced by a ferrite bead.
3.3V
VCC
.01µF 10Ω
VCCA
.01µF
10µF
Figure 2. Power Supply Filtering
ICS8430AY-62 REVISION A JULY 2, 2009
11
©2009 Integrated Device Technology, Inc.
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet ICS8430-62.PDF ] | |
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