ICS87974I Datasheet, PDF (3/16 Pages) Integrated Device Technology – Fully integrated PLL

SIMPLIFIED BLOCK DIAGRAM
CLK_SEL
CLK0
CLK1
FB_IN
CLK_EN
SEL_A
VCO_SEL
0
0
1
1
PLL
PLL_SEL
SEL_B
SEL_C
FB_SEL(0:1)
2
nMR/OE
ICS87974I
LOW SKEW, 1-TO-15,
LVCMOS/LVTTL CLOCK GENERATOR
÷2
0
÷4
1
SEL_A
0 ÷2
1 ÷4
SEL_B
0 ÷2
1 ÷4
SEL_C
0 ÷4
1 ÷6
DQ
5
QA0:QA4
DQ
5
QB0:QB4
DQ
4
QC0:QC3
FB_0 FB_1
0 0 ÷4
0 1 ÷6
1 0 ÷8
1 1 ÷12
DQ
QFB
87974CYI
www.idt.com
3
REV. E JULY 26, 2010