ICS87972I Datasheet, PDF (2/17 Pages) Integrated Circuit Systems – LOW SKEW, 1-TO-12 LVCMOS CLOCK MULTIPLIER/ZERO DELAY BUFFER

BLOCK DIAGRAM
ICS87972I
LOW SKEW, 1-TO-12
LVCMOS/LVTTL CLOCK MULTIPLIER/ZERO DELAY BUFFER
XTAL1
XTAL2
VCO_SEL
PLL_SEL
REF_SEL
CLK0
CLK1
CLK_SEL
EXT_FB
1
0
0
1
PHASE
DETECTOR
0
VCO
1
LPF
FSEL_FB2
nMR/OE
POWER-ON
RESET
FSEL_A0:1
FSEL_B0:1
FSEL_C0:1
FSEL_FB0:2
FRZ_CLK
FRZ_DATA
INV_CLK
÷4, ÷6, ÷8, ÷12
÷4, ÷6, ÷8, ÷10
÷2, ÷4, ÷6, ÷8
2
÷4, ÷6, ÷8, ÷10
2
2
SYNC PULSE
3
DATA GENERATOR
0
÷2 1
OUTPUT DISABLE
CIRCUITRY
12
DQ
SYNC
FRZ
SYNC
FRZ
SYNC
FRZ
SYNC
FRZ
DQ
SYNC
FRZ
SYNC
FRZ
SYNC
FRZ
SYNC
FRZ
QA0
QA1
QA2
QA3
QB0
QB1
QB2
QB3
DQ
DQ
DQ
SYNC
FRZ
SYNC
FRZ
SYNC
FRZ
DQ
SYNC
FRZ
QC0
QC1
QC2
QC3
QFB
QSYNC
87972DYI
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2
REV. E JUNE 25, 2010