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87974I PDF даташит

Спецификация 87974I изготовлена ​​​​«IDT» и имеет функцию, называемую «LVCMOS/LVTTL Clock Generator».

Детали детали

Номер произв 87974I
Описание LVCMOS/LVTTL Clock Generator
Производители IDT
логотип IDT логотип 

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87974I Даташит, Описание, Даташиты
Low Skew, 1-to-15,
LVCMOS/LVTTL Clock Generator
87974I
Data Sheet
GENERAL DESCRIPTION
The 87974I is a low skew, low jitter 1-to-15 LVCMOS/
LVTTL Clock Generator/Zero Delay Buffer. The device
has a fully integrated PLL and three banks whose divider
ratios can be independently controlled, providing output
frequency relationships of 1:1, 2:1, 3:1, 3:2, 3:2:1. In
addition, the external feedback connection provides for a wide
selection of output-to-input frequency ratios. The CLK0 and
CLK1 pins allow for redundant clocking on the input and dynam-
ically switching the PLL between two clock sources.
Guaranteed low jitter and output skew characteristics make
the 87974I ideal for those applications demanding well defined
performance and repeatability.
FEATURES
Fully integrated PLL
Fifteen single ended 3.3V LVCMOS/LVTTL outputs
Two LVCMOS/LVTTL clock inputs for redundant clock applica-
tions
CLK0 and CLK1 accepts the following input levels:
LVCMOS/LVTTL
Output frequency range: 8.33MHz to 125MHz
VCO range: 200MHz to 500MHz
External feedback for ”zero delay” clock regeneration
Cycle-to-cycle jitter: ±100ps (typical)
Output skew: 350ps (maximum)
3.3V operating supply
-40°C to 85°C ambient operating temperature
Available in lead-free RoHS-compliant package
PIN ASSIGNMENT
52-Lead LQFP
10mm x 10mm x 1.4mm package body
Y package
Top View
©2016 Integrated Device Technology, Inc
1
Revision E January 26, 2016









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87974I Даташит, Описание, Даташиты
BLOCK DIAGRAM
87974I Data Sheet
©2016 Integrated Device Technology, Inc
2
Revision E January 26, 2016









No Preview Available !

87974I Даташит, Описание, Даташиты
87974I Data Sheet
SIMPLIFIED BLOCK DIAGRAM
CLK_SEL
CLK0
CLK1
FB_IN
CLK_EN
SEL_A
VCO_SEL
0
1 PLL
PLL_SEL
SEL_B
SEL_C
FB_SEL(0:1)
nMR/OE
2
0
÷2 0
SEL_A
0 ÷2
DQ
1
÷4 1
1 ÷4
5 QA0:QA4
SEL_B
0 ÷2
1 ÷4
DQ
5
QB0:QB4
SEL_C
0 ÷4
1 ÷6
DQ
4
QC0:QC3
FB_0 FB_1
0 0 ÷4
0 1 ÷6
1 0 ÷8
1 1 ÷12
DQ
QFB
©2016 Integrated Device Technology, Inc
3
Revision E January 26, 2016










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Номер в каталогеОписаниеПроизводители
87974ILVCMOS/LVTTL Clock GeneratorIDT
IDT

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