ICS839893I Datasheet, PDF (1/10 Pages) Integrated Circuit Systems – LOW SKEW, 1-TO-13 LVCMOS/LVTTL BUFFER DIVIDER

Integrated
Circuit
Systems, Inc.
ICS839893I
LOW SKEW, 1-TO-13
LVCMOS/LVTTL BUFFER DIVIDER
GENERAL DESCRIPTION
The ICS839893I is a high-performance one to
ICS
thirteen LVCMOS/LVTTL buffer/divider and is
HiPerClockS™ _{a member of the HiPerClockS™ family of High}
Performance Clock Solutions from ICS. The
device has two selectable LVCMOS/LVTTL
clock inputs and it generates 13 new LVCMOS/LVTTL clock
outputs. The first bank of six outputs offers divide-by-1, 2, 4,
8 or 16. The second bank of six outputs can be configured to
the same divide ratio as the first bank, or with an additional
divide-by-two. The first two banks can be placed into a high-
impedance output state with the assertion of a LOW on the
nOE/MR input. One additional output can be configured
to divide-by-4, 6, 8 or 16. This device is functional with full
3.3V or full 2.5V supplies.
FEATURES
• 13 LVCMOS/LVTTL outputs: 3 banks (6, 6, 1 outputs per
bank respectively)
• Selectable CLK0 or CLK1 LVCMOS/LVTTL clock inputs
• CLK0, CLK1 supports the following input types:
LVCMOS, LVTTL
• Maximum output frequency: 250MHz
• Output skew: 40ps (maximum), within bank
• Full 3.3V or 2.5V operating supply
• -40°C to 85°C ambient operating temperature
• Available in both, Standard and RoHS/Lead-Free compliant
packages
SIMPLIFIED BLOCK DIAGRAM
nOE/MR
CLK0
0
CLK1
1
REF_SEL
FSEL[0:2]
FSEL3
F_FS_SE_EL_L0₀ F_FS_SEL_E1_L1 FS_FE_SL_E2 _L2QA_QA
0
0
0 ÷1
0
0
0 ÷1
0
0
1 ÷2
0
1
0 ÷2
0
1
1 ÷4
1
0
0 ÷2
1
0
1 ÷16
1
1
0 ÷8
1
1
1 ÷4
0
÷2 ¹
FSEL0 FSEL1 FSEL2 QC
0
0
0 ÷8
0
0
1 ÷8
0
1
0 ÷6
0
1
1 ÷8
1
0
0 ÷4
1
0
1 ÷16
1
1
0 ÷8
1
1
1 ÷4
DQ
DQ
DQ
PIN ASSIGNMENT
GND
QA0:QA5 QA0
QA1
VDDO_A
GND
QA2
QB0:QB5 _QA3
VDDO_A
GND
QA4
QA5
QC
VDDO_A
36 35 34 33 32 31 30 29 28 27 26 25
37
24
38
23
39
22
40 _ICS839893I 21
41
48-Pin LQFP
20
42 _{7mm x 7mm x 1.4mm} 19
43
body package
18
44
17
45
Y Package
16
46
Top View
15
47
14
48
13
1 2 3 4 5 6 7 8 9 10 11 12
GND
QB0
QB1
VDDO_B
GND
QB2
QB3
VDDO_B
GND
QB4
QB5
VDDO_B
839893AYI
www.icst.com/products/hiperclocks.html
1
REV. A AUGUST 8, 2005