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參數(shù)資料
| 型號(hào)： | ICS84334AYT |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | 時(shí)鐘產(chǎn)生/分配 |
| 英文描述： | 700 MHz, OTHER CLOCK GENERATOR, PQFP48 |
| 封裝： | 7 X 7 MM, 1.40 MM HEIGHT, MS-026, LQFP-48 |
| 文件頁數(shù)： | 1/21頁 |
| 文件大?。?/td> | 335K |
| 代理商： | ICS84334AYT |
84334BY
www.icst.com/products/hiperclocks.html
REV. A JULY 22, 2004
1
Integrated
Circuit
Systems, Inc.
ICS84334
MULTI-RATE LVPECL FREQUENCY SYNTHESIZER
PRELIMINARY
GENERAL DESCRIPTION
The ICS84334 is a general purpose, low phase
noise LVPECL synthesizer which can generate
frequencies for a wide variety of applications. The
ICS84334 has a 4:1 input Multiplexer from which
the following inputs can be selected: 1 differential
input, 1 single-ended input, or two crystal oscillators,
thus making the device ideal for frequency translation or
frequency generation. Each differential LVPECL output pair has
an output divider which can be independently set so that two
different frequencies can be generated. Additionally, each
LVPECL output pair has a dedicated power supply pin so the
outputs can run at 3.3V or 2.5V. The ICS84334 also supplies a
buffered copy of the reference clock or crystal frequency on the
single-ended REF_CLK pin which can be enabled or disabled
(disabled by default).The output frequency can be programmed
using either a serial or parallel programming interface.
The phase noise/phase jitter of the ICS84334 is excellent and
is expected to be in the 2-5ps rms range, thus making it
suitable for use in Fibre Channel, SONET, and Ethernet/1Gb
Ethernet applications.
Example applications include systems which must support both
FEC and non FEC rates. In 10 Gb Fibre Channel, for example,
you can use a 25.5MHz crystal to generate a 159.375MHz
reference clock, and then switch to a 20.544MHz crystal to
generate 164.355MHz for 66/64 FEC. Other applications could
include supporting both Ethernet frequencies and SONET
frequencies in an application. When Ethernet frequencies are
needed, a 25MHz crystal can be used and when SONET
frequencies are needed, the input MUX can be switched to select
a 38.88MHz Crystal.
FEATURES
Dual differential 3.3V LVPECL outputs which can be set
independently for either 3.3V or 2.5V
4:1 Input Mux:
1 differential input
1 single-ended input
2 crystal oscillator interfaces
CLK, nCLK pair can accept the following differential
input levels: LVPECL, LVDS, LVHSTL, HCSL, SSTL
TEST_CLK accepts LVCMOS or LVTTL input levels
Output frequency range: 31.25MHz to 700MHz
Crystal input frequency range: 12MHz to 40MHz
VCO range: 500MHz to 700MHz
Parallel or serial interface for programming feedback divider
and output dividers
RMS phase jitter at 106.25MHz, using a 25.5MHz crystal
(637KHz to 5MHz): 2.31ps (typical)
Phase noise: 106.25MHz (typical), using a 25.5MHz crystal
Offset
Noise Power
100Hz ....................... -86 dBc/Hz
1KHz ..................... -111 dBc/Hz
10KHz ..................... -125 dBc/Hz
100KHz ..................... -130 dBc/Hz
Supply voltage modes:
LVPECL outputs (core/outputs):
3.3V/3.3V
3.3V/2.5V
REF_CLK output (core/outputs):
3.3V/3.3V
0°C to 70°C ambient operating temperature
HiPerClockS
ICS
PIN ASSIGNMENT
48 47 46 45 44 43 42 41 40 39 38 37
13 14 15 16 17 18 19 20 21 22 23 24
1
2
3
4
5
6
7
8
9
10
11
12
36
35
34
33
32
31
30
29
28
27
26
25
NA2
NB0
NB1
NB2
OE_REF
OE_A
OE_B
VCC
nc
VEE
XTAL_OUT1
XTAL_IN1
XTAL_OUT0
XTAL_IN0
TEST_CLK
SEL1
SEL0
VCCA
S_LOAD
S_DATA
S_CLOCK
MR
CLK
nCLK
nP_LOAD
VCO_SEL
M0
M1
M2
M3
M4
M5
NA0
NA1
ICS84334
48-Pin LQFP
7mm x 7mm x 1.4mm
package body
Y Package
Top View
V
EE
nc
V
CCO
_
REF
REF_CLK
V
CCOB
nFOUTB0
FOUTB0
V
CCOA
nFOUT
A0
FOUT
A
0
V
CC
TEST
The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on initial
product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICS843404 | 制造商:ICS 制造商全稱:ICS 功能描述:LVCMOS/CRYSTAL-TO-3.3V LVPECL AND LVDS CLOCK GENERATOR |
| ICS843404AG | 制造商:ICS 制造商全稱:ICS 功能描述:LVCMOS/CRYSTAL-TO-3.3V LVPECL AND LVDS CLOCK GENERATOR |
| ICS843404AGLF | 制造商:ICS 制造商全稱:ICS 功能描述:LVCMOS/CRYSTAL-TO-3.3V LVPECL AND LVDS CLOCK GENERATOR |
| ICS843404AGLFT | 制造商:ICS 制造商全稱:ICS 功能描述:LVCMOS/CRYSTAL-TO-3.3V LVPECL AND LVDS CLOCK GENERATOR |
| ICS843404AGT | 制造商:ICS 制造商全稱:ICS 功能描述:LVCMOS/CRYSTAL-TO-3.3V LVPECL AND LVDS CLOCK GENERATOR |
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