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ICS840001AK-34 Datasheet(PDF) 1 Page - Integrated Circuit Systems

Part # ICS840001AK-34
Description  FEMTOCLOCKS??CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER
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Manufacturer  ICST [Integrated Circuit Systems]
Direct Link  http://www.icst.com
Logo ICST - Integrated Circuit Systems

ICS840001AK-34 Datasheet(HTML) 1 Page - Integrated Circuit Systems

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840001AK-34
www.icst.com/products/hiperclocks.html
REV. A MAY 6, 2005
1
Integrated
Circuit
Systems, Inc.
ICS840001-34
FEMTOCLOCKS™CRYSTAL-TO-
LVCMOS/LVTTL FREQUENCY SYNTHESIZER
PRELIMINARY
GENERAL DESCRIPTION
The ICS840001-34 is a two output LVCMOS/
LVTTL Synthesizer and a member of the
HiPerClocksTM family of high performance
devices from ICS. One output is the LVCMOS/
LVTTL main synthesized clock output (Q) and
one output is a three-state LVCMOS/LVTTL reference
clock (REF_CLK) output at the frequency of the crystal
oscillator. The device can accept crystal from 15.3125MHz
to 42.67MHz and can synthesize outputs from 81.67MHz
to 213.33MHz.The ICS840001-34 has excellent <1ps
phase jitter performance over the 637kHz – 10MHz
integration range. The ICS840001-34 is packaged in a
3mm x 3mm 16-pin VFQFN, making it ideal for use on
space constrained boards.
FEATURES
• (2) LVCMOS/LVTTL outputs, 20Ω typical output impedence
(1) Main clock output (Q)
(1) Three-state reference clock output (REF_CLK)
• Crystal oscillator interface can accept crystals from
15.3125MHz to 42.67MHz, 18pF parallel resonant crystal
• Output frequency range: 81.67MHz to 213.33MHz
• VCO range: 490MHz to 640MHz
• RMS phase jitter @ 106.25MHz, using a 26.5625MHz crystal
(637kHz - 10MHz): 0.38ps (typical)
• 3.3V operating supply
• 0°C to 70°C ambient operating temperature
HiPerClockS™
ICS
BLOCK DIAGRAM
PIN ASSIGNMENT
OSC
Phase
Detector
VCO
490MHz - 640MHz
00 = ÷3
01 = ÷4
10 = ÷5
11 = ÷6 (default)
11 = ÷15 (default)
10 = ÷24
01 = ÷25
00 = ÷32
XTAL_IN
XTAL_OUT
OE
Q
M1
M0
N1
N0
(Pullup)
ICS840001-34
16-Lead VFQFN
3mm x 3mm x 0.95 package body
K Package
Top View
OE
XTAL_IN
XTAL_OUT
M0
Q
VDDO
GND
VDD
1
2
3
4
12
11
10
9
5
6
7
8
16 15 14 13
REF_CLK
(Pullup)
(Pullup)
(Pullup)
(Pullup)
COMMON APPLICATION CONFIGURATION TABLE
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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.


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