ICS840001I PDF预览

ICS840001I

更新时间: 2025-07-25 04:44:23
品牌 Logo 应用领域
矽成 - ICSI /
页数 文件大小 规格书
11页 173K
描述
FEMTOCLOCKS⑩ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER

ICS840001I 数据手册

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PRELIMINARY  
ICS840001I  
Integrated  
Circuit  
Systems, Inc.  
FEMTOCLOCKS™ CRYSTAL-TO-  
LVCMOS/LVTTL CLOCK GENERATOR  
GENERAL DESCRIPTION  
FEATURES  
The ICS840001I is a Fibre Channel Clock 1 LVCMOS/LVTTL output, 7Ω typical output impedence  
ICS  
Generator and a member of the HiPerClocksTM  
Crystal oscillator interface designed for 26.5625MHz,  
family of high performance devices from ICS.The  
18pF parallel resonant crystal  
HiPerClockS™  
ICS840001I uses a 26.5625MHz crystal to  
synthesize either 106.25MHz or 212.5MHz, using  
Selectable 106.25MHz or 212.5MHz output frequency  
VCO range: 560MHz to 680MHz  
the FREQ_SEL pin.The ICS840001I has excellent phase jitter  
performance, over the 637kHz – 5MHz integration range. The  
ICS840001I is packaged in a small 8-pin TSSOP, making it  
ideal for use in systems with limited board space.  
RMS phase jitter @ 106.25MHz, using a 26.5625MHz crystal  
(637kHz - 5MHz): 0.70ps (typical)  
3.3V or 2.5V operating supply  
-40°C to 85°C ambient operating temperature  
FUNCTION TABLE  
Input  
Output Frequencies  
FREQ_SEL  
0
1
106.25MHz (Default)  
212.5MHz  
Crystal: 26.5625MHz  
BLOCK DIAGRAM  
PIN ASSIGNMENT  
(Pullup)  
OE  
VDDA  
OE  
VDD  
1
2
3
4
8
7
6
5
(Pulldown)  
FREQ_SEL  
Q
XTAL_OUT  
XTAL_IN  
GND  
FREQ_SEL  
1
0
÷3  
÷6  
VCO  
XTAL_IN  
OSC  
XTAL_OUT  
ICS840001I  
8-Lead TSSOP  
4.40mm x 3.0mm x 0.925mm  
package body  
Phase  
Detector  
Q
637.5MHz w/  
26.5625MHz Ref.  
G Package  
TopView  
M = ÷24 (fixed)  
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.  
840001AGI  
www.icst.com/products/hiperclocks.html  
REV. A JUNE 20, 2005  
1

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