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Número de pieza | ICS843S2807 | |
Descripción | CRYSTAL-TOLVPECL/LVDS/LVCMOS CLOCK GENERATOR | |
Fabricantes | IDT | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de ICS843S2807 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
No Preview Available ! 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
1 page ICS843S2807
FEMTOCLOCK™ CRYSTAL-TO-LVPECL/LVDS/LVCMOS CLOCK GENERATOR
PRELIMINARY
TABLE 6. AC CHARACTERISTICS, VCC = VCCO_LVCMOS = 3.3V ± 5%,TA = 0°C TO 70°C
Symbol Parameter
Test Conditions
Minimum Typical
QD0/nQD0
350
QA0
133
QA1/nQA1
F_SEL1 = 1, F_SEL0 = 1
66.67
QA1/nQA1
fOUT
Output Frequency
QA1/nQA1
F_SEL1 = 0, F_SEL0 = 1
F_SEL1 = 1, F_SEL0 = 0
100
125
QB0, QB1
50
QC0/nQC0
87.5
REF_OUT
25
tsk(b)
Bank Skew;
NOTE 1, 2
QB0, QB1
TBD
REF_OUT
75
QA0
150
tjit(cc)
Cycle-to-Cycle
Jitter; NOTE 2
QB0, QB1
QA1/nQA1
75
200
QC0/nQC0
50
tR / tF
Output
Rise/Fall Time
QD0/nQD0
REF_OUT,
QA0, QB0, QB1
QA1/nQA1,
QC0/nQC0
20% to 80%
20% to 80%
50
350
250
QD0/nQD0
20% to 80%
400
REF_OUT,
QA0, QB0, QB1
45
odc Output Duty Cycle QA1/nQA1,
QC0/nQC0
45
QD0/nQD0
45
NOTE 1: Defined as skew within a bank of outputs at the same voltages and with equal load conditions.
NOTE 2: This parameter is defined in accordance with JEDEC Standard 65.
Maximum
55
55
55
Units
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
%
%
%
IDT™ / ICS™ LVPECL/LVDS/LVCMOS CLOCK GENERATOR
5
ICS843S2807BY REV. A JANUARY 30, 2008
5 Page ICS843S2807
FEMTOCLOCK™ CRYSTAL-TO-LVPECL/LVDS/LVCMOS CLOCK GENERATOR
RELIABILITY INFORMATION
PRELIMINARY
TABLE 7. θ VS. AIR FLOW TABLE FOR 32 LEAD LQFP
JA
θ by Velocity (Meters per Second)
JA
Multi-Layer PCB, JEDEC Standard Test Boards
0
71.9°C/W
1
62.1°C/W
TRANSISTOR COUNT
The transistor count for ICS843S2807 is: 11,230
2.5
58.5°C/W
IDT™ / ICS™ LVPECL/LVDS/LVCMOS CLOCK GENERATOR
11
ICS843S2807BY REV. A JANUARY 30, 2008
11 Page |
Páginas | Total 14 Páginas | |
PDF Descargar | [ Datasheet ICS843S2807.PDF ] |
Número de pieza | Descripción | Fabricantes |
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