SPREAD SPECTRUM MULTIPLIER CLOCK
DATASHEET
MK1714-02
Description
The MK1714-02 is a low cost, high performance clock
synthesizer with selectable multipliers and percentages of
spread designed to generate high frequency clocks with low
EMI. Using analog/digital Phase Locked Loop (PLL)
techniques, the device accepts an inexpensive,
fundamental mode, parallel resonant crystal or clock input
to produce a spread or dithered output. This reduces the
EMI amplitude peaks at the odd harmonics by several dB.
The OE pin puts both outputs into a high impedance state
for board level testing. The PD pin powers down the entire
chip and the outputs are held low.
Features
• Packaged in 20-pin tiny SSOP
• Available in Pb (lead) free package
• Operating voltage of 3.3 V or 5 V
• Multiplier modes of x1, x2, x3, x4, x5, and x6
• Inexpensive 10 - 25 MHz crystal or clock input
• OE pin tri-states the outputs for board testing
• Power down pin stops the outputs low
• Selectable frequency spread
• Spread can be turned on or off
• Advanced, low power CMOS process
• Duty cycle of 40/60
• Industrial temperature range available
NOTE: EOL for non-green parts to occur on 5/13/10
per PDN U-09-01
Block Diagram
5
S4:0
PD
Low EMI Enable
X1
Input
Crystal or
Clock
X2
Crystal
Oscillator
XSEL
VDD
2
PLL Clock
Multiplier and
Spread
Spectrum
Circuitry
Clock Out
REF
4
GND
OE (both outputs)
IDT™ SPREAD SPECTRUM MULTIPLIER CLOCK
1
MK1714-02 REV J 121809