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SG588 PDF даташит

Спецификация SG588 изготовлена ​​​​«IMI» и имеет функцию, называемую «Low EMI Clock Generator».

Детали детали

Номер произв SG588
Описание Low EMI Clock Generator
Производители IMI
логотип IMI логотип 

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SG588 Даташит, Описание, Даташиты
SG588
Approved Product
Low EMI Clock Generator for Digital Camera
Product Features
The IMISG588 is a clock generator that integrates clock
requirements for Digital Camera. It integrates a
Spectrum Spread technology, a modulation technique
designed specifically for reducing EMI at the
fundamental frequency and its harmonics. The
IMISG588 generates three output clocks: a buffered
reference output (4fsc) of the crystal and 2 other clocks
(CLK1,CLK2) generated by the internal Phase Lock
Loops. CLK1 clock is modulated output for EMI
attenuation. The IMISG588 is packaged in a 16pin
TSSOP package for minimum occupation of board
space.
Support clock requirements for Digital Camera
Application.
Integrates Spectrum Spread technology for
EMI attenuation.
30 mA buffer switching current
16 pin TSSOP package.
Pin Configuration
Pin Description
XIN, XOUT - Forms an on-chip reference oscillator
when connected to terminals of an external parallel
resonant crystal, 14.318MHz for NTSC. XIN may also
serve as input for an externally generated reference
signal.
4fsc – Buffered reference output clock of the crystal.
CLK1 and CLK2 – CLK1 and CLK2, are derived from
the reference crystal oscillator by using Phase-Locked
Loop (PLL). CLK1 integrates a proprietary frequency
modulation technique called Spread Spectrum Clock
Generation (SSCG) to reduce the Electro Magnetic
Interference (EMI) found in high speed digital systems.
The amount of modulation (Spread %) of CLK1 is +/-
0.5% or +/-0.1% Center-Spread. Modulation frequency
of spread is 31.3995KHz. See table 1 for frequencies
and function.
SEL1 and SEL2 – These pins are used to select the
clock frequencies, spread on/off and spread bandwidth
to be modulated +/-0.5% or +/-0.1%. See table 1.
These pins have internal pull-up resistors.
4fsc
VDD
SEL3
VSS
XIN
CLK2ON
XOUT
SEL1
1
2
3
4
5
6
7
8
16 VDD
15 VSS
14 CLK2
13 VDD
12 VSS
11 SEL2
10 SS RESET
9 CLK1
CLK2ON – This pin is used to enable/disable CLK2
output. When Low, CLK2 to be disabled, low state.
When High (default), CLK2 to be enabled. This pin has
an internal pull-up resistor.
SS_RESET– This pin is used to reset location of SSCG
profile. When signal goes high to low, the location of
SSCG profile is reset to the reference frequency. This
pin has an internal pull-up resistor.
VDD – Circuit positive power supply.
VSS – Circuit ground.
INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.
MILPITAS, CA 95035 TEL: 408-263-6300 FAX: 408-263-6571
Rev.1.4
1/12/2000
Page 1 of 7
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SG588 Даташит, Описание, Даташиты
Approved Product
Block Diagram
SG588
Low EMI Clock Generator for Digital Camera
XIN
5
7
XOUT
XTAL
Reference
Oscilator
VDD
Divider
SEL1 8
SEL2 11
SEL3 3
SS_ 10
RESET
VDD
VDD
VDD
16
13
2
VSS
VSS
VSS
12
15
4
Divider
Phase
Detector
Loop
Filter
SSCG ROM
SSCG Devider
Multiplexer and
Logic
Phase
Detector
Loop
Filter
Divider and Logic
Buf 1 4fsc
VCO
Divider
Buf 9 CLK1
VCO
Divider
Buf 14 CLK2
6 CLK2ON
INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.
MILPITAS, CA 95035 TEL: 408-263-6300 FAX: 408-263-6571
Rev.1.4
1/12/2000
Page 2 of 7
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SG588 Даташит, Описание, Даташиты
SG588
Approved Product
Low EMI Clock Generator for Digital Camera
Frequency Selection and SSCG Mode Table
Frequencies [MHz]
SEL1
H
H
H
H
L
L
L
L
H
H
H
H
L
L
L
L
SEL2
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
SEL3
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
CLK2ON
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
4fsc
X’tal buffer
X’tal buffer
X’tal buffer
X’tal buffer
X’tal buffer
X’tal buffer
X’tal buffer
X’tal buffer
X’tal buffer
X’tal buffer
X’tal buffer
X’tal buffer
X’tal buffer
X’tal buffer
X’tal buffer
X’tal buffer
CLK1
71.877264+/-0.1%
71.877264
71.877264+/-0.5%
96.016031+/-0.1%
114.545440+/-0.1%
114.545440
114.545440+/-0.5%
96.016031
71.877264+/-0.1%
71.877264
71.877264+/-0.5%
96.016031+/-0.1%
114.545440+/-0.1%
114.545440
114.545440+/-0.5%
96.016031
CLK2
48.008015
48.008015
48.008015
48.008015
96.016031
96.016031
96.016031
48.008015
DISABLE(LOW)
DISABLE(LOW)
DISABLE(LOW)
DISABLE(LOW)
DISABLE(LOW)
DISABLE(LOW)
DISABLE(LOW)
DISABLE(LOW)
Frequency ratio
XIN=14.318180MHz
(1) 71.877264MHz:
(2) 96.016031MHz:
(3) 114.545440MHz:
(4) 48.008015MHz:
(5) 96.016031MHz:
XIN * 251/25/2
XIN * 228/17/2
XIN * 112/7/2
XIN * 57*2/17/2
XIN * 57*2/17
Table-1
INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.
MILPITAS, CA 95035 TEL: 408-263-6300 FAX: 408-263-6571
Rev.1.4
1/12/2000
Page 3 of 7
Free Datasheet http://www.datasheet4u.com/










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