ics87951-147 Integrated Device Technology, ics87951-147 Datasheet

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ics87951-147

Manufacturer Part Number
ics87951-147
Description
Differential Or Lvcmos-input Lvcmos-output 2 9 250-mhz Clock Generator
Manufacturer
Integrated Device Technology
Datasheet
G
puts. The single ended clock input accepts LVCMOS or LVTTL
input levels. The CLK1, nCLK1 pair can accept most standard
differential input levels. With output frequencies up to 180MHz,
the ICS87951I-147 is targeted for high performance clock appli-
cations. Along with a fully integrated PLL, the ICS87951I-147
contains frequency configurable outputs and an external feed-
back input for regenerating clocks with “zero delay”.
87951AYI-147
P
HiPerClockS™
ICS
ENERAL
IN
DIV_SELA
DIV_SELB
DIV_SELC
DIV_SELD
A
EXT_FB
CLK1
GND
SSIGNMENT
V
DDA
7mm x 7mm x 1.4mm package body
The ICS87951I-147 is a low voltage, low skew 1-
to-9 Differential-to-LVCMOS/LVTTL Zero Delay
Buffer and a member of the HiPerClockS™ fam-
ily of High Performance Clock Solutions from ICS.
The ICS87951I-147 has two selectable clock in-
Integrated
Circuit
Systems, Inc.
D
1
2
3
4
5
6
7
8
ESCRIPTION
32 31 30 29 28 27 26 25
9 10 11 12 13 14 15 16
ICS87951I-147
32-Lead LQFP
Y package
Top View
www.icst.com/products/hiperclocks.html
D
24
23
22
21
20
19
18
17
IFFERENTIAL
QC0
V
QC1
GND
QD0
V
QD1
GND
DDO
DDO
1
-
TO
• Fully integrated PLL
• 9 single ended 3.3V or 2.5V LVCMOS/LVTTL outputs
• Selectable single ended CLK0 or
• The single ended CLK0 input can accept the following
• CLK1, nCLK1 supports the following input types:
• Output frequency range: 31.25MHz to 200MHz
• VCO range: 250MHz to 500MHz
• External feedback for ”zero delay” clock regeneration
• Cycle-to-cycle jitter, RMS: 7ps (maximum)
• Output skew: 270ps (maximum)
• Full 3.3V operating supply at -40°C to 85°C ambient
• Full 2.5V operating supply at 0°C to 85°C ambient
• Lead-Free package fully RoHS compliant
F
differential CLK1, nCLK1 inputs
input levels: LVCMOS or LVTTL input levels
LVDS, LVPECL, LVHSTL, SSTL, HCSL
operating temperature
operating temperature
EATURES
-LVCMOS/LVTTL Z
ICS87951I-147
ERO
L
OW
D
S
ELAY
KEW
REV. A JUNE 14, 2005
, 1-
B
UFFER
TO
-9

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ics87951-147 Summary of contents

Page 1

... The CLK1, nCLK1 pair can accept most standard differential input levels. With output frequencies up to 180MHz, the ICS87951I-147 is targeted for high performance clock appli- cations. Along with a fully integrated PLL, the ICS87951I-147 contains frequency configurable outputs and an external feed- back input for regenerating clocks with “zero delay”. ...

Page 2

... EXT_FB Internal Pulldown DIV_SELB Internal Pulldown DIV_SELC Internal Pulldown MR/nOE Internal Pulldown DIV_SELD 87951AYI-147 D - -LVCMOS/LVTTL Z IFFERENTIAL PHASE VCO DETECTOR 250-500MHz LPF POWER-ON RESET www.icst.com/products/hiperclocks.html 2 ICS87951I-147 KEW D ERO ELAY ÷ ÷ ÷ QC0 0 QC1 1 QD0 QD1 ...

Page 3

... www.icst.com/products/hiperclocks.html 3 ICS87951I-147 KEW D ERO ELAY ...

Page 4

... www.icst.com/products/hiperclocks.html 4 ICS87951I-147 KEW D ERO ELAY F T NPUT UNCTION ABLE ...

Page 5

... www.icst.com/products/hiperclocks.html 5 ICS87951I-147 KEW D ERO ELAY = -40°C 85° ...

Page 6

... 2.5V±5%, T DDA DDO www.icst.com/products/hiperclocks.html 6 ICS87951I-147 KEW D ERO ELAY = -40°C 85° ...

Page 7

... www.icst.com/products/hiperclocks.html 7 ICS87951I-147 KEW D ERO ELAY ...

Page 8

... Outputs t cycle n UTPUT nCLK1 CLK0, CLK1 EXT_FB x 100% (where t (Ø) is any random sample, and t (Ø) of the sampled cycles measured on controlled edges ERIOD HASE ITTER AND www.icst.com/products/hiperclocks.html 8 ICS87951I-147 KEW D ERO ELAY I NFORMATION SCOPE OAD EST IRCUIT V DDO ...

Page 9

... UPPLY ILTERING ECHNIQUES As in any high speed analog circuitry, the power supply pins are vulnerable to random noise. The ICS87951I-147 provides separate 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

... 3B. H NPUT RIVEN BY IGURE RIVER 3.3V 3.3V R4 125 LVDS_Driv er CLK nCLK HiPerClockS Input 3D. H NPUT RIVEN BY IGURE www.icst.com/products/hiperclocks.html 10 ICS87951I-147 KEW D ERO ELAY 3. Ohm CLK Ohm nCLK HiPerClockS Input CLK/nCLK ...

Page 11

... 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 in the second row pertains to most designs RANSISTOR OUNT The transistor count for ICS87951I-147 is: 2674 Pin compatible with the MPC951 87951AYI-147 D - -LVCMOS/LVTTL Z IFFERENTIAL ...

Page 12

... ° www.icst.com/products/hiperclocks.html 12 ICS87951I-147 ERO ELAY ...

Page 13

... L " " " " www.icst.com/products/hiperclocks.html 13 ICS87951I-147 KEW D ERO ELAY ° ...

Page 14

... www.icst.com/products/hiperclocks.html 14 ICS87951I-147 KEW D ERO ELAY REV. A JUNE 14, 2005 ...

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