ICS844801I-24 Datasheet, PDF (1/13 Pages) Integrated Device Technology – FEMTOCLOCKS™ CRYSTAL-TO-LVDS 400MHZ FREQUENCY SYNTHESIZER

PRELIMINARY
FEMTOCLOCKS™ CRYSTAL-TO-LVDS
400MHZ FREQUENCY SYNTHESIZER
GENERAL DESCRIPTION
ICS
The ICS844801I-24 is a 400MHz Frequency
Synthesizer and a member of the HiPerClocks^TM
HiPerClockS™ _{family of high performance devices from IDT.}
The ICS844801I-24 uses an 18pF parallel
resonant crystal over the range of 21.5625MHz -
25.3125MHz. The ICS844801I-24 has excellent <1ps phase
jitter performance, over the 12kHz - 20MHz integration range.
The ICS844801I-24 is packaged in a small 8-pin TSSOP, making
it ideal for use in systems with limited board space.
ICS844801I-24
FEATURES
• One differential LVDS output
• Crystal oscillator interface, 18pF parallel resonant crystal
(21.5625MHz - 25.3125MHz)
• Output frequency range: 172.5MHz - 202.5MHz, and
345MHz - 405MHz
• VCO range: 690MHz - 810MHz
• RMS phase jitter @ 400MHz, using a 25MHz crystal
(12kHz - 20MHz): 0.57ps (typical) @ 3.3V
• 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
COMMON CONFIGURATION TABLE
Inputs
Crystal Frequency (MHz) FREQ_SEL M
25
0
32
25
1
32
Output Frequency
N
Multiplication
Value M/N
(MHz)
2
16
400
4
8
200
BLOCK DIAGRAM
FREQ_SEL ^Pullup
XTAL_IN
XTAL_OUT
OSC
Phase
Detector
VCO
690MHz - 810MHz
M = ÷32 (fixed)
FREQ_SEL N
0
÷2
1
÷4
PIN ASSIGNMENT
VDDA 1
8 VDD
XTAL_OUT 2
7Q
XTAL_IN 3
6 nQ
Q
GND 4
5 FREQ_SEL
nQ
ICS844801I-24
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^™ LVDS 400MHZ FREQUENCY SYNTHESIZER
1
ICS844801AGI-24 REV A JANUARY 16, 2008