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ICS8735AM-21

Description
700MHZ, DIFFERENTIAL-TO-3.3V LVPECL ZERO DELAY CLOCK GENERATOR
File Size188KB,15 Pages
ManufacturerETC
Download Datasheet Compare View All

ICS8735AM-21 Overview

700MHZ, DIFFERENTIAL-TO-3.3V LVPECL ZERO DELAY CLOCK GENERATOR

Integrated
Circuit
Systems, Inc.
ICS8735-21
700MH
Z
, D
IFFERENTIAL
-
TO
-3.3V LVPECL
Z
ERO
D
ELAY
C
LOCK
G
ENERATOR
F
EATURES
1 differential 3.3V LVPECL output pair,
1 differential feedback output pair
Differential CLK, nCLK input pair
CLK, nCLK pair can accept the following differential
input levels: LVDS, LVPECL, LVHSTL, SSTL, HCSL
Output frequency range: 31.25MHz to 700MHz
Input frequency range: 31.25MHz to 700MHz
VCO range: 250MHz to 700MHz
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
External feedback for “zero delay” clock regeneration
with configurable frequencies
Cycle-to-cycle jitter: 25ps (maximum)
Static phase offset: 50ps ± 100ps
3.3V supply voltage
0°C to 70°C ambient operating temperature
Industrial temperature information available upon request
G
ENERAL
D
ESCRIPTION
The ICS8735-21 is a highly versatile 1:1 Differ-
ential-to-3.3V LVPECL clock generator and a
HiPerClockS™
member of the HiPerClockS™family of High Per-
formance Clock Solutions from ICS. The CLK,
nCLK pair can accept most standard differential
input levels. The ICS8735-21 has a fully integrated PLL and
can be configured as 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 out-
put-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.
ICS
B
LOCK
D
IAGRAM
PLL_SEL
÷1, ÷2, ÷4, ÷8,
÷16, ÷32, ÷64
P
IN
A
SSIGNMENT
0
1
Q
nQ
QFB
nQFB
CLK
nCLK
MR
V
CC
nFB_IN
FB_IN
SEL2
V
EE
nQFB
QFB
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
nc
SEL1
SEL0
V
CC
PLL_SEL
V
CCA
SEL3
V
CCO
Q
nQ
CLK
nCLK
PLL
8:1, 4:1, 2:1, 1:1,
1:2, 1:4, 1:8
FB_IN
nFB_IN
ICS8735-21
20-Lead, 300-MIL SOIC
7.5mm x 12.8mm x 2.3mm body package
M Package
Top View
SEL0
SEL1
SEL2
SEL3
MR
8735AM-21
www.icst.com/products/hiperclocks.html
1
REV. D OCTOBER 27, 2003

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Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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