ICS87004 ICST [Integrated Circuit Systems], ICS87004 Datasheet

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ICS87004

Manufacturer Part Number
ICS87004
Description
1:4, DIFFERENTIAL-TO-LVCMOS/LVTTL ZERO DELAY CLOCK GENERATOR
Manufacturer
ICST [Integrated Circuit Systems]
Datasheet

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ICS87004AGLF
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ICS87004AGLF
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Quantity:
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B
CLK_SEL
87004AG
G
and CLK1, nCLK1 pairs can accept most standard differential
input levels. Internal bias on the nCLK0 and nCLK1 inputs
allows the CLK0 and CLK1 inputs to accept LVCMOS/LVTTL.
The ICS87004 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 refer-
ence divider, feedback divider and output divider are each
programmable, thereby allowing for the following output-to-
input frequency ratios: 8:1, 4:1, 2:1, 1:1, 1:2, 1:4, 1:8. The exter-
nal 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
nCLK0
nCLK1
LOCK
FB_IN
ENERAL
CLK0
CLK1
SEL0
SEL1
SEL2
SEL3
MR
D
The ICS87004 is a highly versatile 1:4 Differential-
to-LVCMOS/LVTTL Clock Generator and a mem-
ber of the HiPerClockS™ family of High Perfor-
mance Clock Solutions from ICS. The ICS87004
has two selectable clock inputs. The CLK0, nCLK0
IAGRAM
Integrated
Circuit
Systems, Inc.
D
0
1
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
1
Q0
Q1
Q2
Q3
F
• 4 LVCMOS/LVTTL outputs, 7 typical output impedance
• Selectable CLK0, nCLK0 or CLK1, nCLK1 clock inputs
• CLKx, nCLKx pairs can accept the following differential
• Internal bias on nCLK0 and nCLK1 to support
• 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: 45ps (maximum)
• Static phase offset: 50 ± 125ps (3.3V ± 5%)
• Full 3.3V or 2.5V operating supply
• 5V tolerant inputs
• Lead-Free package available
• Industrial temperature information available upon request
P
input levels: LVPECL, LVDS, LVHSTL, HCSL, SSTL
LVCMOS/LVTTL levels on CLK0 and CLK1 inputs
with configurable frequencies
frequency ratios: 8:1, 4:1, 2:1, 1:1, 1:2, 1:4, 1:8
EATURES
IN
1:4, D
A
SSIGNMENT
IFFERENTIAL
CLK_SEL
Z
4.40mm x 7.8mm x 0.92mm
nCLK0
ERO
CLK0
SEL0
SEL1
SEL2
SEL3
GND
V
GND
V
DD
Q0
DD
24-Lead TSSOP
o
D
G Package
1
2
3
4
5
6
7
8
9
10
11
12
Top View
ELAY
-
TO
24
23
22
21
20
19
18
17
16
15
14
13
-LVCMOS/LVTTL
C
Q1
V
Q2
GND
Q3
V
MR
FB_IN
PLL_SEL
CLK1
nCLK1
V
LOCK
DDO
DDO
DDA
ICS87004
G
REV. A JUNE 16, 2004
ENERATOR

Related parts for ICS87004

ICS87004 Summary of contents

Page 1

... Internal bias on the nCLK0 and nCLK1 inputs allows the CLK0 and CLK1 inputs to accept LVCMOS/LVTTL. The ICS87004 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 refer- ...

Page 2

... www.icst.com/products/hiperclocks.html 2 ICS87004 - -LVCMOS/LVTTL IFFERENTIAL ERO ELAY LOCK ENERATOR ...

Page 3

... www.icst.com/products/hiperclocks.html 3 ICS87004 - -LVCMOS/LVTTL ERO ELAY LOCK ENERATOR ...

Page 4

... www.icst.com/products/hiperclocks.html 4 ICS87004 - -LVCMOS/LVTTL IFFERENTIAL ERO ELAY LOCK ENERATOR 70° ...

Page 5

... 2.5V±5 0°C DD DDA DDO www.icst.com/products/hiperclocks.html 5 ICS87004 - -LVCMOS/LVTTL IFFERENTIAL ERO ELAY LOCK ENERATOR 2.5V±5 0°C 70° ...

Page 6

... www.icst.com/products/hiperclocks.html 6 ICS87004 - -LVCMOS/LVTTL IFFERENTIAL ERO ELAY LOCK ENERATOR 70° ...

Page 7

... LVCMOS GND -1.25V±5% 2.5V O UTPUT Qx V CMR UTPUT KEW V DDO 2 20% t ➤ cycle n+1 Clock Outputs t cycle n UTPUT ISE www.icst.com/products/hiperclocks.html 7 ICS87004 - -LVCMOS/LVTTL IFFERENTIAL ERO ELAY LOCK ENERATOR I NFORMATION SCOPE OAD EST IRCUIT V DDO 2 V DDO 2 t sk(o) ...

Page 8

... UTPUT UTY YCLE ULSE IDTH ERIOD 87004AG 1:4, D IFFERENTIAL nCLK0 nCLK1 V OL CLK0, CLK1 DDO 2 V Q0: the average mean P D ROPAGATION V DDO 2 www.icst.com/products/hiperclocks.html 8 ICS87004 - -LVCMOS/LVTTL ERO ELAY LOCK ENERATOR V DDO ELAY REV. A JUNE 16, 2004 ...

Page 9

... UPPLY ILTERING ECHNIQUES As in any high speed analog circuitry, the power supply pins are vulnerable to random noise. The ICS87004 provides sepa- rate power supplies to isolate any high switching noise from the outputs to the internal PLL. V should be individually connected to the power supply plane through vias, and bypass capacitors should be used for each pin ...

Page 10

... HiPerClockS Input D F 3B. H NPUT RIVEN BY IGURE RIVER 3.3V 3.3V LVDS_Driv er CLK nCLK HiPerClockS Input 3D. H NPUT RIVEN BY IGURE www.icst.com/products/hiperclocks.html 10 ICS87004 - -LVCMOS/LVTTL IFFERENTIAL ERO ELAY LOCK ENERATOR 3. Ohm CLK Ohm nCLK HiPerClockS Input ...

Page 11

... LOW ABLE FOR JA Multi-Layer PCB, JEDEC Standard Test Boards NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs RANSISTOR OUNT The transistor count for ICS87004 is: 2578 87004AG 1: ELIABILITY NFORMATION 24 L TSSOP EAD ...

Page 12

... ° www.icst.com/products/hiperclocks.html 12 ICS87004 - -LVCMOS/LVTTL ERO ELAY LOCK ENERATOR ...

Page 13

... " " " www.icst.com/products/hiperclocks.html 13 ICS87004 - -LVCMOS/LVTTL ERO ELAY LOCK ENERATOR ° ...

Page 14

... " www.icst.com/products/hiperclocks.html 14 ICS87004 - -LVCMOS/LVTTL IFFERENTIAL ERO ELAY LOCK ENERATOR " REV. A JUNE 16, 2004 ...

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