ICS843S2807 Datasheet, PDF (1/14 Pages) Integrated Device Technology – FEMTOCLOCK™ CRYSTAL-TOLVPECL/LVDS/LVCMOS CLOCK GENERATOR

PRELIMINARY
FEMTOCLOCK™ CRYSTAL-TO-
LVPECL/LVDS/LVCMOS CLOCK GENERATOR
ICS843S2807
GENERAL DESCRIPTION
ICS843S2807 is a low phase noise Clock Generator
ICS
and is a member of the HiperClockS™ family of high
HiPerClockS™ _{performance clock solutions from IDT. The device}
provides five banks of outputs and a reference clock.
The banks can be enabled by using a common output
enable pin. A 25MHz crystal is used to generate the 50MHz,
66.67MHz, 87.5MHz, 100MHz, 125MHz, 133MHz and 350MHz
frequencies.
FEATURES
• Five banks of outputs:
Bank A: one single-ended (QA0) LVCMOS output at: 133MHz
and one (QA1/nQA1) LVPECL output at: 66.67MHz, 100MHz
and 125MHz
Bank B: two (QB0, QB1) LVCMOS outputs at: 50MHz
Bank C: one (QC0/nQC0) differential LVPECL output at: 87.5MHz
Bank D: one (QD0/nQD0) differential LVDS output at: 350MHz
One single-ended LVCMOS reference clock output at: 25MHz
PIN ASSIGNMENT
• Crystal input frequency: 25MHz
• Maximum output frequency: 350MHz
• ±5% frequency margining
• Full 3.3V operating supply
F_SEL0
F_SEL1
VCC
XTAL_IN
XTAL_OUT
VEE
VCCA2
RESET
32 31 30 29 28 27 26 25
1
24
2
23
3 ^ICS843S2807 22
4
32-Lead LQFP
7mm x 7mm x 1.4mm
21
5
package body
20
6
Y Package
19
7
Top View
18
8
17
VCC
QA1
nQA1
VCCA1
VEE
QC0
nQC0
VCC
9 10 11 12 13 14 15 16
F_SEL[1:0] ^Pullup
PLL_BYPASS ^Pulldown
• 0°C to 70°C ambient operating temperature
• Available in both standard (RoHS 5) and lead-free (RoHS6)
packages
BLOCK DIAGRAM
2
÷5.2631
LVCMOS - 25MHz
REF_OUT
LVCMOS - 133MHz
QA0
XTAL_IN
XTAL_OUT
25MHz
OSC
Phase
Detector
VCO
700MHz
1
÷5.6,
0
÷7,
÷10.5
LVPECL - 66.67/100/
125MHz
QA1
nQA1
LVCMOS - 50MHz
QB0
÷28
÷14
±5%
Frequency
Margining
QB1
LVPECL - 87.5MHz
QC0
÷8
nQC0
MARGIN ^Pulldown
LVDS - 350MHz
QD0
÷2
nQD0
MARGIN_MODE ^Pulldown
RESET ^Pulldown
OE ^Pullup
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^™ LVPECL/LVDS/LVCMOS CLOCK GENERATOR
1
ICS843S2807BY REV. A JANUARY 30, 2008