ICS843081I-01 Datasheet, PDF (1/15 Pages) Integrated Circuit Systems – FEMTOCLOCKS™ CRYSTAL-TO-3.3V, 2.5V LVPECL CLOCK MULTIPLIER

Integrated
Circuit
Systems, Inc.
ICS843081I-01
FEMTOCLOCKS™ CRYSTAL-TO-
3.3V, 2.5V LVPECL CLOCK MULTIPLIER
GENERAL DESCRIPTION
The ICS843081I-01 is an Ethernet Clock
ICS
Multiplier and a member of the HiPerClocks^TM
HiPerClockS™ _{family of high performance devices from ICS. The}
ICS843081I-01 accepts a crystal reference of
19.6MHz - 28MHz. The ICS843081I-01 has
excellent 1ps or lower phase jitter performance, over the
1.875MHz - 20MHz integration range. The ICS843081I-01 is
packaged in a small 8-pin TSSOP, making it ideal for use in
systems with limited board space.
FEATURES
• One differential LVPECL output
• One crystal oscillator interface: 19.6MHz - 28MHz
• Output frequency range: 490MHz - 700MHz
• VCO range: 490MHz - 700MHz
• RMS phase jitter @ 625MHz using a 25MHz reference
(1.875MHz - 20MHz): 0.32ps (typical)
• 3.3V or 2.5V operating supply
• -40°C to 85°C ambient operating temperature
• Available in both standard and lead-free RoHS compliant
packages
FREQUENCY EXAMPLE FUNCTION TABLE
Input
XTAL (MHz)
20
25
28
M/N (Multiplier) Output Frequencies (MHz)
25
500
25
625
25
700
BLOCK DIAGRAM
OE
XTAL_IN
XTAL_OUT
Phase
Detector
VCO
490 - 700 MHz
M = ÷25 (fixed)
PIN ASSIGNMENT
VCCA 1
8 VCC
XTAL_OUT 2
7Q
XTAL_IN 3
6 nQ
VEE 4
5 OE
Q
ICS843081I-01
8-Lead TSSOP
nQ
4.40mm x 3.0mm x 0.925mm
package body
G Package
Top View
843081AGI-01
www.icst.com/products/hiperclocks.html
1
REV. B JANUARY 23, 2006