ICS840002-32 Datasheet, PDF (1/8 Pages) Integrated Circuit Systems – FEMTOCLOCKS™ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS840002-32
FEMTOCLOCKS™ CRYSTAL-TO-
LVCMOS/LVTTL FREQUENCY SYNTHESIZER
GENERAL DESCRIPTION
The ICS840002-32 is a 2 output LVCMOS/
ICS
LVTTL Synthesizer optimized to generate
HiPerClockS™ _{Fibre Channel or Serial ATA reference clock}
frequencies and is a member of the
HiPerClocks^TM family of high perfor mance
clock solutions from ICS. Using an 18pF parallel resonant
crystal, the following frequencies can be generated based
on 1 frequency select pin (SEL): 106.25MHz and 75MHz,
or 212.5MHz. The ICS840002-32 uses ICS’ 3^rd generation
low phase noise VCO technology and can achieve 1ps or
lower typical rms phase jitter, easily meeting Fibre Channel
and Serial ATA jitter requirements. The ICS840002-32 is
packaged in a small 8-pin TSSOP package.
FEATURES
• Two LVCMOS/LVTTL outputs, 15Ω typical output impedance
• Crystal oscillator interface
• Output frequency range: 75MHz and 106.25MHz,
or 212.5MHz
• RMS phase jitter at 106.25MHZ (637kHz - 5MHz):
0.86ps (typical)
• Full 3.3V or 3.3V core/2.5V output supply mode
• 0°C to 70°C ambient operating temperature
SELECT FUNCTION TABLE
Input
SEL
0
1
Output Frequency Range (MHz)
Q0
Q1
75
106.25
75
212.5
BLOCK DIAGRAM
26.5625MHz
XTAL_IN
FemtoClock™
XTAL_OUT
SEL
PIN ASSIGNMENT
Q0
VDD 1
8 SEL
XTAL_OUT 2
7 Q0
XTAL_IN 3
6 VDDO
Q1
GND 4
5 Q1
ICS840002-32
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.
840002BG-32
www.icst.com/products/hiperclocks.html
REV. A JUNE 27, 2005
1