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PDF ICS91730 Data sheet ( Hoja de datos )
| Número de pieza | ICS91730 | |
| Descripción | Clock Generator | |
| Fabricantes | Integrated Circuit Systems | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ICS91730 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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Integrated
Circuit
Systems, Inc.
ICS91730
Low EMI, Spread Modulating, Clock Generator
Features:
• ICS91730 is a Spread Spectrum Clock targeted for
Mobile PC and LCD panel applications that
generates an EMI-optimized clock signal (EMI peak
reduction of 7-14 dB on 3rd-19th harmonics) through
use of Spread Spectrum techniques.
• ICS91730 focuses on the lower input frequency
range of 14.318 to 80.00 MHz with a spread
modulation of 20kHz to 40kHz.
Specifications:
• Supply Voltages: VDD = 3.3V ±0.3V
• Frequency range: 14.318 MHz ≤ Fin ≥ 80 MHz
• Cyc to Cyc jitter: <150ps
• Output duty cycle 45-55%
• Guarantees +85°C operational condition.
• 8-pin SOIC
• Reference input
Pin Configuration
CLKIN 1
VDD 2
GND 3
CLKOUT 4
8 PD#*
7 SCLK
6 SDATA
5 REF_OUT/FS_IN1*
8 Pin SOIC
* Internal Pull-Up Resistor
Functionality
FSIN_1
0
1
MHz
14.318 MHz in --> 27MHz out
27.00MHz in --> 27.00MHz out
Spread % default
-0.8 down spread
-1.25 down spread
Block Diagram
CLKIN
PLL1
Spread
Spectrum
REFOUT
CLKOUT
PD#
SDATA
SCLK
FS_IN1
0794D—05/23/05
Control
Logic
Config.
Reg.
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ICS91730
Byte
0
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Pin #
-
-
Bit 0
Byte
1
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Pin #
-
Byte
2
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Pin #
x
x
x
x
x
x
x
x
Affected Pin
Name
Control Function
FS0 Spread/FS0
FS1 Spread/FS1
FS2 Spread/FS2
FS3 Spread/FS3
FS4 FS4
PD# Tri_Sate
PD# Tri_Sate
Spread Enable
Spread Enable
Spread Spectrum Control
FS 3:4 Hard/Software
HW/SW Control
Select
Type
RW
RW
RW
RW
RW
RW
RW
RW
Bit Control
01
Srpead Pecentage
See Table1
These are I2C bits
only
Hi-Z
OFF
LOW
ON
HW SW
PWD
1
0
0
0
0
1
1
0
Affected Pin
Name
Control Function
REF_OUT
REF_OUT_Enable
REF_OUT
Slew Rate REF-OUT
FS-IN_1
FS-IN_1 Readback
(Reserved)
(Reserved)
CLK_OUT
Slew Rate CLK-OUT
CLK_OUT
CLK_OUT_Enable
(Reserved)
(Reserved)
(Reserved)
(Reserved)
Type
RW
RW
R
R
RW
RW
R
R
Bit Control
01
Disable Enable
Nominal Fast
--
--
Nominal Fast
Disable Enable
--
--
PWD
1
1
X
0
1
1
1
1
Affected Pin
Name
Control Function
- (Reserved)
(Reserved)
(Reserved)
(Reserved)
(Reserved)
(Reserved)
(Reserved)
(Reserved)
(Reserved)
(Reserved)
(Reserved)
(Reserved)
(Reserved)
(Reserved)
(Reserved)
Type
-
RW
RW
RW
RW
RW
RW
RW
Bit Control
01
--
Disable Enable
Disable Enable
Disable Enable
Disable Enable
Disable Enable
Disable Enable
Disable Enable
PWD
1
1
1
1
1
1
1
1
0794D—05/23/05
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ICS91730
Revision History
Rev. Issue Date Description
B 06/25/04 Add Lead Free package description to Ordering Information
C 06/29/04 Add Revision History table to datasheet.
1. Revise ABS Max Ratings.
2. Updated REF Electrical Characteristics Table.
D 05/23/05 3. Updated LF Ordering Information from "Lead Free" to "RoHS Compliant".
Page #
10
11
8-10
0794D—05/23/05
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11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet ICS91730.PDF ] | |
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