參數(shù)資料
型號(hào)： ICS8431AM-11LFT
廠(chǎng)商： INTEGRATED DEVICE TECHNOLOGY INC
元件分類(lèi)： 時(shí)鐘產(chǎn)生/分配
英文描述： 400 MHz, OTHER CLOCK GENERATOR, PDSO28
封裝： SOIC-28
文件頁(yè)數(shù)： 1/7頁(yè)
文件大?。?/td> 97K
代理商： ICS8431AM-11LFT
Integrated
Circuit
Systems, Inc.
8431-11
www.icst.com
REV. A - SEPTEMBER 25, 2000
1
ICS8431-11
CLOCK SYNTHESIZER
PRELIMINARY
GENERAL DESCRIPTION
The ICS8431-11 is a general purpose clock
frequency synthesizer and a member of the
HiPerClockS
family of High Performance
Clock Solutions from ICS. The VCO operates at
a frequency range of 280MHz to 400MHz. The
output frequency can be programmed using the parallel inter-
face, M0 thru M8, to the configuration logic. Spread spectrum
clocking is programmed via the Power Up Latch inputs
SSC_CTL0 and SSC_CTL1.
HiPerClockS
,&6
XTAL1
XTAL2
M0:M8
PLL
FOUT
nFOUT
÷ 16
TEST_I/O
OSC
VCO
÷ N
PHASE
DETECTOR
÷ M
Power Up
Latch
Configuration
Logic
MR
SSC_CTL0
FEATURES
Fully integrated PLL
Differential 3.3V LVPECL output
Programmable PLL loop divider for generating a variety of
output frequencies.
Crystal oscillator interface
Spread Spectrum Clocking (SSC) fixed at 1/2% modulation
for environments requiring ultra low EMI
Master reset for programming contents of the Power Up
Latch
LVTTL / LVCMOS control inputs
PLL bypass modes supporting in-circuit testing and on-chip
functional block characterization
3.3V supply voltage
28 lead SOIC
0°C to 70°C ambient operating temperature
BLOCK DIAGRAM
PIN ASSIGNMENT
SSC_CTL1
M0
M1
M2
M3
M4
M5
M6
M7
M8
SSC_CTL 0
SSC_CTL 1
GND
TEST_I/O
VDD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
nP_LOAD
VDDI
XTAL2
XTAL1
nc
VDDA
GND
MR
nc
VDDO
FOUT
nFOUT
GND
ICS8431-11
28-Lead SOIC
M Package
Top View
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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