參數(shù)資料
型號(hào): MK1716-01RT
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類: 時(shí)鐘產(chǎn)生/分配
英文描述: 133.33 MHz, OTHER CLOCK GENERATOR, PDSO28
封裝: 0.150 INCH, SSOP-28
文件頁(yè)數(shù): 1/8頁(yè)
文件大?。?/td> 126K
代理商: MK1716-01RT
MK1716-01
MDS 1716-01 D
1
Revision 051504
Integrated Circuit S ystems 52 5 Race Stree t , San Jose, CA 951 26 tel (408) 2 97-12 01 www.icst.com
SERIAL PROGRAMMABLE CLOCK WITH SPREAD SPECTRUM
Description
The MK1716-01 is a versatile serial programmable
clock source which takes up very little board space.
The device can simultaneously generate two groups of
4 output clocks and a reference clock output. Both
clock groups (CLKA and CLKB) are derived from a
single PLL, and have the ability to incorporate Spread
Spectrum frequency modulation for reduced system
EMI. Each group has control of independent PLL
output divide values. Outputs may be programmed on
the fly, and will lock to a new frequency in 10 ms or less.
Each of the two groups are powered by a separate
VDDIO voltage. The reference clock uses the fixed
VDD voltage. VDDIO may vary from 2.5 V to VDD.
The devices includes a OE pin which tri-states the
output clocks and when tied low.
ICS’ VersaClockTM software allows the user to
generate MK1716-01 device optimizing configuration
code for target output frequencies and spread
spectrum amounts.
Features
Packaged in 28-pin SSOP
Operating voltage 3.3 V
Serially programmable: user determines the output
frequency via a 3-wire interface
Highly accurate frequency generation
M/N Multiplier PLL: M = 1..2048, N = 1..1024
Eliminates the need for custom Quartz Oscillators
Input crystal frequency of 5-27 MHz
Optional programmable on-chip crystal capacitors
Output clock frequencies of 250 kHz to 133.33 MHz
Spread Spectrum frequency modulation for reduced
system EMI
Center or down spread ±0.5% min to 4% total
Selectable 32 kHz and 120 kHz modulation rate
Advanced, low power, sub-micron CMOS process
Separate VDD ‘s for each bank of 4 outputs
Output skew <250 ps within output bank
OE control on outputs
Block Diagram
Clock
Buffer/
Crystal
Ocsillator
VDD
GND
PLL
with
Spread
SpectrumCircuit
REF OUT
CLKA
CLKB
VDDIOA
VDDIOB
DIV A
DIV B
OE
4
6
X2
Crystal or
clock input
External capacitors are
required with a crystal input.
X1/ICLK
SCLK
DATA
STROBE
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