ICS8705BY Integrated Device Technology, Inc., ICS8705BY Datasheet

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ICS8705BY

Manufacturer Part Number
ICS8705BY
Description
Manufacturer
Integrated Device Technology, Inc.
Datasheet

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CLK_SEL
8705BY
G
nCLK1 pair can accept most standard differential input lev-
els. The single ended CLK0 input accepts LVCMOS or LVTTL
input levels.The ICS8705 has a fully integrated PLL and can
be configured as zero delay buffer, multiplier or divider and
has an input and output frequency range of 15.625MHz to
250MHz. The reference divider, feedback divider and output
divider are each programmable, thereby allowing for the fol-
lowing output-to-input frequency ratios: 8:1, 4:1, 2:1, 1:1, 1:2,
1:4, 1:8. The external feedback allows the device to achieve
“zero delay” between the input clock and the output clocks.
The PLL_SEL pin can be used to bypass the PLL for system
test and debug purposes. In bypass mode, the reference clock
is routed around the PLL and into the internal output dividers.
PLL_SEL
HiPerClockS™
ICS
nCLK1
B
FB_IN
ENERAL
CLK0
CLK1
SEL0
SEL1
SEL2
SEL3
MR
LOCK
The ICS8705 is a highly versatile 1:8 Differen-
tial-to-LVCMOS/LVTTL Clock Generator and a
member of the HiPerClockS™ family of High Per-
formance Clock Solutions from ICS. The ICS8705
has two selectable clock inputs. The CLK1,
D
Integrated
Circuit
Systems, Inc.
D
0
1
IAGRAM
ESCRIPTION
8:1, 4:1, 2:1, 1:1,
1:2, 1:4, 1:8
÷2, ÷4, ÷8, ÷16,
÷32
,
÷64, ÷128
PLL
www.icst.com/products/hiperclocks.html
0
1
Z
ERO
1
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
D
F
• 8 LVCMOS/LVTTL outputs, 7Ω typical output impedance
• Selectable CLK1, nCLK1 or LVCMOS/LVTTL clock inputs
• CLK1, nCLK1 pair can accept the following differential
• CLK0 input accepts LVCMOS or LVTTL input levels
• Output frequency range: 15.625MHz to 250MHz
• Input frequency range: 15.625MHz to 250MHz
• VCO range: 250MHz to 500MHz
• External feedback for “zero delay” clock regeneration
• Programmable dividers allow for the following output-to-input
• Fully integrated PLL
• Cycle-to-cycle jitter: 45ps (maximum)
• Output skew: CLK0, 65ps (maximum)
• Static Phase Offset: 25 ±125ps (maximum), CLK0
• Full 3.3V or 2.5V operating supply
• 0°C to 70°C ambient operating temperature
• Lead-Free package fully RoHS compliant
input levels: LVPECL, LVDS, LVHSTL, HCSL, SSTL
with configurable frequencies
frequency ratios: 8:1, 4:1, 2:1, 1:1, 1:2, 1:4, 1:8
EATURES
ELAY
P
IN
CLK_SEL
, D
A
nCLK1
SEL0
SEL1
CLK0
CLK1
SSIGNMENT
IFFERENTIAL
MR
nc
CLK1, nCLK1, 55ps (maximum)
1
2
3
4
5
6
7
8
32 31 30 29 28 27 26 25
9 10 11 12 13 14 15 16
7mm x 7mm x 1.4 mm
32-Lead LQFP
Y Package
ICS8705
-
Top View
TO
-LVCMOS/LVTTL
C
LOCK
ICS8705
REV. G MARCH 18, 2005
G
24
23
22
21
20
19
18
17
ENERATOR
V
Q5
GND
Q4
V
Q3
GND
Q2
DDO
DDO

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ICS8705BY Summary of contents

Page 1

Integrated Circuit Systems, Inc ENERAL ESCRIPTION The ICS8705 is a highly versatile 1:8 Differen- ICS tial-to-LVCMOS/LVTTL Clock Generator and a HiPerClockS™ member of the HiPerClockS™ family of High Per- formance Clock Solutions from ICS. The ICS8705 has two ...

Page 2

Integrated Circuit Systems, Inc ABLE IN ESCRIPTIONS ...

Page 3

Integrated Circuit Systems, Inc. T 3A. PLL ABLE NABLE UNCTION ABLE ...

Page 4

Integrated Circuit Systems, Inc BSOLUTE AXIMUM ATINGS Supply Voltage Inputs Outputs Package Thermal Impedance, θ JA Storage Temperature, T STG T 4A ABLE OWER UPPLY HARACTERISTICS S ...

Page 5

Integrated Circuit Systems, Inc ABLE IFFERENTIAL HARACTERISTICS ...

Page 6

Integrated Circuit Systems, Inc ABLE OWER UPPLY HARACTERISTICS ...

Page 7

Integrated Circuit Systems, Inc ABLE HARACTERISTICS ...

Page 8

Integrated Circuit Systems, Inc. P ARAMETER 1.65V± DDA V DDO LVCMOS GND -1.165V±5% 3.3V C /3. ORE UTPUT OAD EST V DD nCLK V Cross Points PP CLK GND D I ...

Page 9

Integrated Circuit Systems, Inc. nCLK1 CLK1 FB_IN ➤ ➤ t (Ø) t jit(Ø (Ø) — t (Ø) = Phase Jitter mean t (Ø) = Static Phase Offset mean (where t (Ø) is any random sample, and t (Ø) ...

Page 10

Integrated Circuit Systems, Inc OWER UPPLY ILTERING ECHNIQUES As in any high speed analog circuitry, the power supply pins are vulnerable to random noise. The ICS8705 provides sepa- rate power supplies to isolate any high switching ...

Page 11

Integrated Circuit Systems, Inc IFFERENTIAL LOCK NPUT NTERFACE The CLK /nCLK accepts LVDS, LVPECL, LVHSTL, SSTL, HCSL and other differential signals. Both V and V SWING V and V input requirements. Figures show ...

Page 12

Integrated Circuit Systems, Inc AYOUT UIDELINE The schematic of the ICS8705 layout example is shown in Figure 4A. The ICS8705 recommended PCB board layout for this example is shown in Figure 4B. This layout example is used as ...

Page 13

Integrated Circuit Systems, Inc. The following component footprints are used in this layout example: All the resistors and capacitors are size 0603 OWER AND ROUNDING Place the decoupling capacitors as close as possible to the power pins. If ...

Page 14

Integrated Circuit Systems, Inc. θ ABLE VS IR LOW ABLE FOR JA Single-Layer PCB, JEDEC Standard Test Boards Multi-Layer PCB, JEDEC Standard Test Boards NOTE: Most modern PCB designs use multi-layered boards. The data ...

Page 15

Integrated Circuit Systems, Inc ACKAGE UTLINE UFFIX FOR EAD ABLE ...

Page 16

Integrated Circuit Systems, Inc ABLE RDERING NFORMATION ...

Page 17

Integrated Circuit Systems, Inc ...

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