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부품번호 | MK2049-35 기능 |
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기능 | 3.3 V Communications Clock PLL | ||
제조업체 | Integrated Circuit Systems | ||
로고 | |||
전체 10 페이지수
MK2049-35
3.3 V Communications Clock PLL
Description
The MK2049-35 is a Phase-Locked Loop (PLL)
based clock synthesizer that accepts multiple input
frequencies. With an 8 kHz clock input as a
reference, the MK2049-35 generates T1, E1, T3,
E3, OC3/3, Gigabit Ethernet, and other
communications frequencies. This allows for the
generation of clocks frequency-locked to an 8 kHz
backplane clock, simplifying clock synchronization
in communications systems.
This part also has a jitter-attenuated Buffer
capability. In this mode, the MK2049-35 is ideal
for filtering jitter from with high jitter clocks.
ICS/MicroClock can customize these devices for
many other different frequencies. Contact your
ICS/MicroClock representative for more details.
Features
• Packaged in 20 pin SOIC
• 3.3 V ±5% operation
• Meets the TR62411, ETS300 011, and GR-1244
specification for MTIE, Pull-in/Hold-in Range,
Phase Transients, and Jitter Generation for
Stratum 3, 4, and 4E
• Accepts multiple inputs: 8 kHz backplane clock,
or 10 to 50 MHz
• Locks to 8 kHz ±100 ppm (External mode)
• Buffer Mode allows jitter attenuation of
10-50 MHz input and x1/x0.5 or x1/x2 outputs
• Exact internal ratios enable zero ppm error
• Output clock rates include T1, E1, T3, E3,
and OC3 submultiples
• See the MK2049-01, -02, and -03 for more
selections at VDD = 5 V, and the MK2049-34 for
more selections at 3.3 V
Block Diagram
VDD
3
GND
3
RES
FS3:0 4
Clock
Input
Reference
Crystal X1
External/
Buffer Mode
Mux
Crystal
Oscillator
X2
FCAP
PLL
Clock
Synthesis,
Control, and
Jitter
Attenuation
Circuitry
Output
Buffer
Output
Buffer
Output
Buffer
CAP1
CAP2
CLK
CLK/2
8 kHz
(External
Mode only)
MDS 2049-35 A
1
Revision 121300
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126 • (408)295-9800tel• www.icst.com
MK2049-35
3.3 V Communications Clock PLL
MK2049-35 Output Decoding Table – External Mode (MHz)
ICLK FS3 FS2 FS1 FS0 CLK/2 CLK
8K
Crystal
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
0 0 0 0 1.544 3.088 8 kHz
0 0 0 1 2.048 4.096 8 kHz
0 0 1 0 22.368 44.736 8 kHz
0 0 1 1 17.184 34.368 8 kHz
0 1 0 0 19.44 38.88 8 kHz
0 1 0 1 12.8
25.6 8 kHz
0 1 1 0 25.92 51.84 8 kHz
0 1 1 1 4.096 8.192 8 kHz
1 0 0 0 18.528 37.056 8 kHz
1 0 0 1 12.352 24.704 8 kHz
1 0 1 0 24.576 49.152 8 kHz
1 0 1 1 16.384 32.768 8 kHz
1 1 0 0 17.28 34.56 8 kHz
1 1 0 1 62.5
125 8 kHz
24.576
24.576
24.576
24.576
19.44
25.6
17.28
16.384
24.704
24.704
16.384
16.384
17.28
25
MK2049-35 Output Decoding Table – Buffer Mode (MHz)
ICLK FS3 FS2 FS1 FS0 CLK/2 CLK
8K
20 - 50
10 - 25
1 1 1 0 ICLK 2*ICLK N/A
1 1 1 1 ICLK/2 ICLK N/A
Crystal
ICLK/2
ICLK
• 0 = connect directly to ground, 1 = connect directly to VDD.
• Crystal is connected to pins 2 and 3; clock input is applied to pin 13.
MDS 2049-35 A
4
Revision 121300
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126 • (408)295-9800tel• www.icst.com
4페이지 MK2049-35
3.3 V Communications Clock PLL
EXTERNAL COMPONENT SELECTION (continued)
Crystal Specifications
Parameter
Operating Temperature Range
Initial Accuracy at 25 C
Temperature stability
Aging, first year
Aging, 10 years
Load Capacitance
Shunt Capacitance, C0
Motional Capacitance, C1
C0/C1 ratio
Equivalent Series Resistance
Minimum
0
-20
-30
-5
-20
none
Typical
25
Note 1
Maximum
70
20
30
5
20
7
none
250
35
Units
°C
ppm
ppm
ppm
ppm
pF
pF
none
Ohms
Note 1: Nominal crystal load capacitance specifications varies with frequency. Contact
the ICS MicroClock applications department at (408)297-1201
Note 2: The third overtone mode of the crystal and all spurs must be >200 ppm away
from 3x the fundamental resonance shown in the table below.
For recommended crystal devices, please contact the ICS MicroClock application department
at 408-297-1201.
MDS 2049-35 A
7
Revision 121300
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126 • (408)295-9800tel• www.icst.com
7페이지 | |||
구 성 | 총 10 페이지수 | ||
다운로드 | [ MK2049-35.PDF 데이터시트 ] |
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구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
MK2049-34 | 3.3 V Communications Clock PLL | Integrated Circuit Systems |
MK2049-34A | 3.3 Volt Communications Clock VCXO PLL | Integrated Circuit Systems |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |