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ICS8745BI-21 Datasheet(PDF) 1 Page - Integrated Device Technology

Part # ICS8745BI-21
Description  Output frequency range
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Manufacturer  IDT [Integrated Device Technology]
Direct Link  http://www.idt.com
Logo IDT - Integrated Device Technology

ICS8745BI-21 Datasheet(HTML) 1 Page - Integrated Device Technology

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DATA SHEET
ICS8745BMI-21 REVISION D JULY 28, 2010
1
©2010 Integrated Device Technology, Inc.
1:1 Differential-to-LVDS Zero Delay
Clock Generator
ICS8745BI-21
9
10 11 12 13 14 15 16
32 31 30
29 28
27 26 25
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
SEL0
SEL1
nc
nc
CLK
nCLK
nc
MR
GND
Q
nQ
VDDO
GND
QFB
nQFB
VDDO
General Description
The ICS8745BI-21 is a highly versatile 1:1 LVDS Clock Generator.
The ICS8745BI-21 has a fully integrated PLL and can be configured
as a zero delay buffer, multiplier or divider, and has an output
frequency range of 31.25MHz to 700MHz. The Reference 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 external feedback allows the
device to achieve “zero delay” between the input clock and the
output clock. 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.
Features
One differential LVDS output designed to meet
or exceed the requirements of ANSI TIA/EIA-644
One differential feedback output pair
Differential CLK, nCLK input pair
CLKx, nCLKx pair can accept the following differential
input levels: LVPECL, LVDS, LVHSTL, HCSL, SSTL
Output frequency range: 31.25MHz to 700MHz
Input frequency range: 31.25MHz to 700MHz
VCO range: 250MHz to 700MHz
External feedback for “zero delay” clock regeneration
with configurable frequencies
Programmable dividers allow for the following output-to-input
frequency ratios: 8:1, 4:1, 2:1, 1:1, 1:2, 1:4, 1:8
Cycle-to-cycle jitter: 30ps (maximum)
Output skew: 40ps (maximum)
Static phase offset: 25ps ± 125ps
Full 3.3V supply voltage
-40°C to 85°C ambient operating temperature
Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
QFB
nQFB
VDDO
SEL2
FB_IN
nFB_IN
MR
nCLK
CLK
GND
SEL1
SEL0
VDD
PLL_SEL
VDDA
SEL3
GND
Q
nQ
VDDO
ICS8745BI-21
20-Lead SOIC
7.5mm x 12.8mm x 2.3mm package body
M Package
Top View
Block Diagram
PLL_SEL
CLK
nCLK
FB_IN
nFB_IN
SEL0
SEL1
SEL2
SEL3
MR
Q
nQ
QFB
nQFB
PLL
8:1, 4:1, 2:1, 1:1,
1:2, 1:4, 1:8
0
1
÷1, ÷2, ÷4, ÷8,
÷16, ÷32, ÷64
Pullup
Pullup
Pulldown
Pullup
Pulldown
Pullup
Pulldown
Pulldown
Pulldown
Pulldown
Pulldown
Pulldown
Pin Assignments
ICS8745BI-21
32 Lead VFQFN
5mm x 5mm x 0.925mm
package body
K Package
Top View


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