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ICS840001I fiches techniques PDF

Integrated Circuit Systems - CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER

Numéro de référence ICS840001I
Description CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER
Fabricant Integrated Circuit Systems 
Logo Integrated Circuit Systems 





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ICS840001I fiche technique
Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS840001I
FEMTOCLOCKS™CRYSTAL-TO-
LVCMOS/LVTTL CLOCK GENERATOR
GENERAL DESCRIPTION
The ICS840001I is a Fibre Channel Clock
ICS Generator and a member of the HiPerClocksTM
HiPerClockS™ family of high performance devices from ICS. The
ICS840001I uses a 26.5625MHz crystal to
synthesize either 106.25MHz or 212.5MHz, using
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
www.DataSheeitd4eUa.clofmor use in systems with limited board space.
FEATURES
1 LVCMOS/LVTTL output, 7Ω typical output impedence
Crystal oscillator interface designed for 26.5625MHz,
18pF parallel resonant crystal
Selectable 106.25MHz or 212.5MHz output frequency
VCO range: 560MHz to 680MHz
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
0 106.25MHz (Default)
1 212.5MHz
Crystal: 26.5625MHz
BLOCK DIAGRAM
PIN ASSIGNMENT
OE (Pullup)
FREQ_SEL (Pulldown)
XTAL_IN
XTAL_OUT
OSC
Phase
Detector
VCO
637.5MHz w/
26.5625MHz Ref.
M = ÷24 (fixed)
÷3 1
÷6 0
Q
VDDA
OE
XTAL_OUT
XTAL_IN
1
2
3
4
8 VDD
7Q
6 GND
5 FREQ_SEL
ICS840001I
8-Lead TSSOP
4.40mm x 3.0mm x 0.925mm
package body
G Package
Top View
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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