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PDF ICS84025 Data sheet ( Hoja de datos )
| Número de pieza | ICS84025 | |
| 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 ICS84025 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS84025
CRYSTAL-TO-LVCMOS / LVTTL
FREQUENCY SYNTHESIZER WITH FANOUT BUFFER
GENERAL DESCRIPTION
The ICS84025 is a Crystal-to-LVCMOS/LVTTL
,&6 Frequency Synthesizer with Fanout Buffer and
HiPerClockS™ a member of the HiPerClockS™ family of High
Performance Clock Solutions from ICS. The
VCO frequency is programmed in steps equal
to the value of the crystal frequency. The VCO and
output frequency can be programmed using the feedback and
output frequency select pins. The low phase noise character-
www.DataSheeits4tUic.csoomf the ICS84025 make it an ideal clock source for Fibre
Channel 1 and Gigabit Ethernet applications.
FUNCTION TABLE
Inputs
XTAL Output Frequency
MR F_SEL1 F_SEL0
F_OUT
1X
X
LOW
00
0 25.5MHz
53.125MHz
00
1 25.5MHz
106.25MHz
01
0 25MHz
62.5MHz
01
1 25MHz
125MHz
FEATURES
• 6 LVCMOS/LVTTL outputs
• Crystal oscillator interface
• Output frequency range: 53.125MHz to 125MHz
• Crystal input frequency: 25MHz and 25.5MHz
• RMS phase jitter at 106.25, using a 25.5MHz crystal
(637KHz to 10MHz): 3.25ps
• Phase noise:
Offset
Noise Power
100Hz ................. -100 dBc/Hz
1KHz ................. -115 dBc/Hz
10KHz ................. -125 dBc/Hz
100KHz ................. -127 dBc/Hz
• 3.3V core, outputs may either be 3.3V, 2.5V or 1.8V
• 0°C to 70°C ambient operating temperature
• Industrial temperature information available upon request
BLOCK DIAGRAM
PIN ASSIGNMENT
XTAL1
XTAL2
OSC
PLL
0
/Output
6 Q0:Q5
1 Divider
Feedback
Divider
F_SEL1
PLL_SEL MR F_SEL0
VDDO
Q0
GND
Q1
VDDO
Q2
GND
Q3
VDDO
Q4
GND
Q5
1
2
3
4
5
6
7
8
9
10
11
12
24 F_SEL0
23 F_SEL1
22 MR
21 XTAL1
20 XTAL2
19 GND
1 8 VDDA
17 VDD
16 PLL_SEL
15 GND
14 nc
13 VDDO
ICS84025
24-Lead, 300-MIL SOIC
7.5mm x 15.33mm x 2.3mm body package
M Package
Top View
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.
84025EM
www.icst.com/products/hiperclocks.html
REV. A APRIL 16, 2003
1
1 page  
Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS84025
CRYSTAL-TO-LVCMOS / LVTTL
FREQUENCY SYNTHESIZER WITH FANOUT BUFFER
TYPICAL PHASE NOISE
www.DataSheet4U.com
84025EM
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
10
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
10
125MHz
62.5MHz
25MHz Input
RMS Phase Noise Jitter
12K to 20MHz = 3.5ps (typical)
100 1k
10k
100k
1M
OFFSET FREQUENCY (HZ)
10M
25.5MHz Input
RMS Phase Noise Jitter
12K to 20MHz = 3.5ps (typical)
106.25MHz
53.125MHz
100
1k 10k
100k
1M
OFFSET FREQUENCY (HZ)
www.icst.com/products/hiperclocks.html
5
10M
REV. A APRIL 16, 2003
5 Page 
Integrated
Circuit
Systems, Inc.
PACKAGE OUTLINE - M SUFFIX
PRELIMINARY
ICS84025
CRYSTAL-TO-LVCMOS / LVTTL
FREQUENCY SYNTHESIZER WITH FANOUT BUFFER
www.DataSheet4U.com
84025EM
TABLE 7. PACKAGE DIMENSIONS
SYMBOL
Millimeters
Minimum
Maximum
N 24
A -- 2.65
A1 0.10
--
A2 2.05
2.55
B 0.33 0.51
C 0.18 0.32
D
15.20
15.85
E 7.40 7.60
e 1.27 BASIC
H
10.00
10.65
h 0.25 0.75
L 0.40 1.27
α 0°
8°
Reference Document: JEDEC Publication 95, MS-013, MO-119
www.icst.com/products/hiperclocks.html
11
REV. A APRIL 16, 2003
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet ICS84025.PDF ] | |
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