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PDF ICS8402 Data sheet ( Hoja de datos )
| Número de pieza | ICS8402 | |
| Descripción | CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER | |
| Fabricantes | Integrated Circuit Systems | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ICS8402 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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Integrated
Circuit
Systems, Inc.
ICS8402
350MHZ, CRYSTAL-TO-LVCMOS / LVTTL
FREQUENCY SYNTHESIZER
GENERAL DESCRIPTION
ICS
The ICS8402 is a general purpose, Crystal-to-
LVCMOS/LVTTL High Frequency Synthesizer and
HiPerClockS™ a member of the HiPerClockS™ family of High
Performance Clock Solutions from ICS. The
ICS8402 has a selectable TEST_CLK or crystal
inputs. The VCO operates at a frequency range of 250MHz
to 700MHz. The VCO frequency is programmed in steps equal
to the value of the input reference or crystal frequency. The
www.DataSheeVt4CUO.comand output frequency can be programmed using the
serial or parallel interfaces to the configuration logic. The low
phase noise characteristics of the ICS8402 make it an ideal
clock source for Gigabit Ethernet and SONET applications.
FEATURES
• 2 LVCMOS/LVTTL outputs
• Selectable crystal oscillator interface
or LVCMOS/LVTTL TEST_CLK
• Output frequency range: 15.625MHz to 350MHz
• Crystal input frequency range: 12MHz to 40MHz
• VCO range: 250MHz to 700MHz
• Parallel or serial interface for programming counter
and output dividers
• RMS period jitter: 8ps (typical)
• Cycle-to-cycle jitter: 40ps (typical)
• Full 3.3V or mixed 3.3V core/2.5V output supply voltage
• 0°C to 70°C ambient operating temperature
• Industrial temperature information available upon request
BLOCK DIAGRAM
PIN ASSIGNMENT
OE0
OE1
VCO_SEL
XTAL_SEL
TEST_CLK
XTAL1
XTAL2
MR
S_LOAD
S_DATA
S_CLOCK
nP_LOAD
M0:M8
N0:N1
8402AY
OSC
0
1
PLL
PHASE DETECTOR
VCO
0 ÷2
÷4
÷M
1
÷8
÷16
CONFIGURATION
INTERFACE
LOGIC
M5
M6
M7
M8
N0
N1
nc
GND
32 31 30 29 28 27 26 25
1 24
2 23
3 22
4
ICS8402
21
5 20
6 19
7 18
8 17
9 10 11 12 13 14 15 16
XTAL2
TEST_CLK
XTAL_SEL
VDDA
S_LOAD
S_DATA
S_CLOCK
MR
Q0
Q1
TEST
32-Lead LQFP
7mm x 7mm x 1.4mm package body
Y Package
Top View
32-Lead VFQFN
5mm x 5mm x 0.75mm package body
K Package
Top View
www.icst.com/products/hiperclocks.html
REV. B OCTOBER 6, 2004
1
1 page  
Integrated
Circuit
Systems, Inc.
ICS8402
350MHZ, CRYSTAL-TO-LVCMOS / LVTTL
FREQUENCY SYNTHESIZER
TABLE 3B. PROGRAMMABLE VCO FREQUENCY FUNCTION TABLE
VCO Frequency
(MHz)
M Divide
256
M8
128
M7
64
M6
32
M5
16
M4
8
M3
4
M2
2
M1
250 10 0 0 0 0 0 1 0 1
275 11 0 0 0 0 0 1 0 1
• • ••••••••
www.DataSheet4U.com •
650
• ••••••••
26 0 0 0 0 1 1 0 1
675 27 0 0 0 0 1 1 0 1
700 28 0 0 0 0 1 1 1 0
NOTE 1: These M divide values and the resulting frequencies correspond to crystal or TEST_CLK input frequency
of 25MHz.
1
M0
0
1
•
•
0
1
0
TABLE 3C. PROGRAMMABLE OUTPUT DIVIDER FUNCTION TABLE
Inputs
N1 N0
00
01
10
11
N Divider Value
2
4
8
16
Output Frequency
(MHz)
Minimum Maximum
125 350
62.5 175
31.25
87.5
15.625
43.75
TABLE 3D. OUTPUT ENABLE & CLOCK ENABLE FUNCTION TABLE
Control Inputs
OE0 OE1
00
01
10
11
Output
Q0 Q1
Hi-Z Hi-Z
Hi-Z Enabled
Enabled
Hi-Z
Enabled Enabled
8402AY
www.icst.com/products/hiperclocks.html
5
REV. B OCTOBER 6, 2004
5 Page 
Integrated
Circuit
Systems, Inc.
ICS8402
350MHZ, CRYSTAL-TO-LVCMOS / LVTTL
FREQUENCY SYNTHESIZER
RELIABILITY INFORMATION
TABLE 8A. θJAVS. AIR FLOW TABLE FOR 32 LEAD LQFP
www.DataSheet4U.com
θJA by Velocity (Linear Feet per Minute)
Single-Layer PCB, JEDEC Standard Test Boards
Multi-Layer PCB, JEDEC Standard Test Boards
0
67.8°C/W
47.9°C/W
200
55.9°C/W
42.1°C/W
500
50.1°C/W
39.4°C/W
NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs.
TABLE 8B. θJAVS. AIR FLOW TABLE FOR A 32 LEAD VFQFN
θJA 0 Air Flow (Linear Feet per Minute)
0
Multi-Layer PCB, JEDEC Standard Test Boards
34.8C/W
TRANSISTOR COUNT
The transistor count for ICS8402 is: 3784
8402AY
www.icst.com/products/hiperclocks.html
11
REV. B OCTOBER 6, 2004
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet ICS8402.PDF ] | |
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