ICS843301I-108 Datasheet, PDF (1/15 Pages) Integrated Device Technology – FEMTOCLOCKS™ CRYSTAL-TO-3.3V, 2.5V LVPECL 75MHZ FREQUENCY SYNTHESIZER W/SSC

PRELIMINARY
FEMTOCLOCKS™ CRYSTAL-TO-3.3V, 2.5V LVPECL
75MHZ FREQUENCY SYNTHESIZER W/SSC
ICS843301I-108
GENERAL DESCRIPTION
The ICS843301I-108 is a 75MHz Frequency
ICS
Generator and a member of the HiPerClocks^TM
HiPerClockS™ _{family of high perfor mance devices from IDT.}
The ICS843301I-108 uses a 20MHz crystal to
synthesize 75MHz output. The device supports
0.5% downspread spread spectrum clocking. The ICS843301I-
108 has excellent <1ps phase jitter performance, over an
integration range of 900kHz - 7.5MHz. The device is packaged
in a small 8-pin TSSOP, making it ideal for use in systems with
limited board space.
FEATURES
• One differential 3.3V or 2.5V LVPECL output
• Crystal oscillator interface designed for 20MHz,
18pF parallel resonant crystal
• Output frequency: 75MHz
• Supports SSC, 0.5% downspread
• RMS phase jitter @ 75MHz, using a 20MHz crystal
(900kHz - 7.5MHz): 0.73ps (typical)
• Full 3.3V or 2.5V operating supply
• -40°C to 85°C ambient operating temperature
• Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages
SSC FUNCTION TABLE
Input
SSC
0 (default)
1
Mode
SSC Off
0.5% Downspread
BLOCK DIAGRAM
PIN ASSIGNMENT
XTAL_IN
XTAL_OUT
20MHz
OSC
SSC ^Pulldown
Phase
Detector
VCO
600MHz
PLL
N Div
÷8
M Div
÷30
VCCA 1
8 VCC
VEE 2
7Q
XTAL_OUT 3
6 nQ
Q
XTAL_IN 4
5 SSC
nQ
ICS843301I-108
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 pre-production. The noted characteristics are based on initial product characterization
and/or qualification. Integrated Device Technology, Incorporated (IDT) reserves the right to change any circuitry or specifications without notice.
IDT^™ / ICS^™ 3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER W/SSC 1
ICS843301BGI-108 REV. A OCTOBER 9, 2007