|
|
PDF ICS840004-01 Data sheet ( Hoja de datos )
| Número de pieza | ICS840004-01 | |
| Descripción | CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER | |
| Fabricantes | Integrated Circuit Systems | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de ICS840004-01 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
|
No Preview Available !
Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS840004-01
FEMTOCLOCKS™CRYSTAL-TO-
LVCMOS/LVTTL FREQUENCY SYNTHESIZER
GENERAL DESCRIPTION
FEATURES
The ICS840004-01 is a 4 output LVCMOS/LVTTL
ICS Synthesizer optimized to generate Ethernet
HiPerClockS™ reference clock frequencies and is a member of
the HiPerClocksTM family of high performance
clock solutions from ICS. Using a 25MHz, 18pF
parallel resonant crystal, the following frequencies can be
generated based on the 2 frequency select pins (F_SEL1:0):
156.25MHz, 125MHz, and 62.5MHz. The ICS840004-01 uses
www.DataSheeItC4US.’c3ormd generation low phase noise VCO technology and can
achieve 1ps or lower typical random rms phase jitter, easily
meeting Ethernet jitter requirements. The ICS840004-01 is
packaged in a small 20-pin TSSOP package.
• Four LVCMOS/LVTTL outputs,
15Ω typical output impedance
• Selectable crystal oscillator interface
or LVCMOS/LVTTL single-ended input
• Output frequency Range: 56MHz - 175MHz
• VCO Range: 560MHz - 700MHz
• RMS phase jitter at 156.25MHz (1.875MHz - 20MHz):
0.52ps (typical) design target
Phase noise:
Offset
Noise Power
100Hz ............... -94.9 dBc/Hz
1kHz ............. -119.6 dBc/Hz
10kHz ............. -128.9 dBc/Hz
100kHz ............. -129.2 dBc/Hz
• Full 3.3V or 3.3V core/2.5V output supply mode
• 0°C to 70°C ambient operating temperature
• Available in both standard and lead-free RoHS-compliant
packages
FREQUENCY SELECT FUNCTION TABLE FOR ETHERNET FREQUENCIES
F_SEL1
0
F_SEL0
0
Inputs
M Divider N Divider
Value
Value
25 4
M/N
Ratio Value
6.25
Output Frequency
(25MHz Ref.)
156.25
0 1 25
5
5
125
1 0 25 10
2.5
62.5
1 1 25
5
5
125
BLOCK DIAGRAM
OE Pullup
F_SEL1:0 Pullup:Pullup
nPLL_SEL Pulldown
nXTAL_SEL Pulldown
XTAL_IN 25MHz
OSC 0
XTAL_OUT
TEST_CLK Pulldown
1
2
Phase
Detector
VCO
F_SEL1:0
1N
0 0 ÷4
0 1 ÷5
0 1 0 ÷10
1 1 ÷5
M = ÷25 (fixed)
PIN ASSIGNMENT
F_SEL0 1 20 F_SEL1
nc 2 19 GND
nXTAL_SEL 3 18 Q0
TEST_CLK 4 17 Q1
OE 5
1 6 VDDO
MR 6 15 Q2
nPLL_SEL 7 14 Q3
VDDA 8
13 GND
nc 9 12 XTAL_IN
Q0 VDD 10 11 XTAL_OUT
ICS840004-01
Q1
20-Lead TSSOP
6.5mm x 4.4mm x 0.92mm
Q2 package body
G Package
Q3 Top View
MR Pulldown
The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on
initial product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications
without notice.
840004AG-01
www.icst.com/products/hiperclocks.html
REV. B JANUARY 3, 2006
1
1 page  
Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS840004-01
FEMTOCLOCKS™CRYSTAL-TO-
LVCMOS/LVTTL FREQUENCY SYNTHESIZER
www.DataSheet4U.com
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
-190
100
TYPICAL PHASE NOISE AT 62.5MHZ @3.3V
1Gb Ethernet Filter
62.5MHz
RMS Phase Jitter (Random)
1.875MHz to 20MHz = 0.55ps (typical)
Raw Phase Noise Data
Phase Noise Result by adding
1Gb Ethernet Filter to raw data
1k 10k 100k 1M 10M 100M
OFFSET FREQUENCY (HZ)
840004AG-01
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
-190
100
TYPICAL PHASE NOISE AT 62.5MHZ @2.5V
1Gb Ethernet Filter
62.5MHz
RMS Phase Jitter (Random)
1.875MHz to 20MHz = 0.53ps (typical)
Raw Phase Noise Data
Phase Noise Result by adding
1Gb Ethernet Filter to raw data
1k
10k
100k
1M
OFFSET FREQUENCY (HZ)
www.icst.com/products/hiperclocks.html
10M
100M
REV. B JANUARY 3, 2006
5
5 Page 
Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS840004-01
FEMTOCLOCKS™CRYSTAL-TO-
LVCMOS/LVTTL FREQUENCY SYNTHESIZER
RELIABILITY INFORMATION
TABLE 6. θJAVS. AIR FLOW TABLE FOR 20 LEAD TSSOP
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
114.5°C/W
73.2°C/W
200
98.0°C/W
66.6°C/W
500
88.0°C/W
63.5°C/W
NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs.
TRANSISTOR COUNT
The transistor count for ICS840004-01 is: 3085
840004AG-01
www.icst.com/products/hiperclocks.html
11
REV. B JANUARY 3, 2006
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet ICS840004-01.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ICS840004-01 | CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER | Integrated Circuit Systems |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |