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MK1714-02 Datasheet

Spread Spectrum Multiplier Clock

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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
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
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 K 051310


Renesas Electronics Components Datasheet

MK1714-02 Datasheet

Spread Spectrum Multiplier Clock

No Preview Available !

MK1714-02
SPREAD SPECTRUM MULTIPLIER CLOCK
SSCG
Pin Assignment
X2
1
X1/ICLK
2
VDD
3
VDD
4
S4
5
S3
6
GND
7
GND
8
S2
9
CLK
10
20
REF
19
OE
18
PD
17
GND
16
S0
15
NC
14
S1
13
GND
12
LEE
11
XSEL
20 pin (150 mil) SSOP (QSOP)
Pin Descriptions
Pin
Pin Pin
Number Name Type
Pin Description
1
X2
XO Crystal connection. Connect to parallel mode crystal. Leave open for clock.
2
X1
XI Crystal connection. Connect to parallel mode crystal or clock.
3
VDD Power Connect to VDD. Must be same value as other VDD.
4
VDD Power Connect to VDD. Must be same value as other VDD.
5
S4 Input Select pin 4. Determines multiplier and spread amount per table on following page. Internal
pull-down.
6
S3 Input Select pin 3. Determines multiplier and spread amount per table on following page. Internal
pull-up.
7
GND Power Connect to ground.
8
GND Power Connect to ground.
9
S2 Input Select pin 2. Determines multiplier and spread amount per table on following page. Internal
pull-up.
10
CLK Output Clock output dependent on input, multiplier, and spread amount per table on following page.
11
XSEL Input Connect to VDD for crystal input, or GND for CLK input. Internal pull-down.
12
LEE Input Low EMI Enable. Turns on spread spectrum on CLK when high. Internal pull-up.
13
GND Power Connect to ground.
14
S1 Input Select pin 1. Determines multiplier and spread amount per table on following page. Internal
pull-up.
17
GND Power Connect to ground.
18
PD Input Power down. Turns off chip when low. Outputs stop low. Leave open or connected to VDD if
power down is not required.
19
OE Input Output enable. Tri-states all outputs when low. Internal pull-up.
20
REF Output Reference clock output from crystal oscillator. This clock is not spread.
Note: When changing the input frequency, the LEE pin must be set low for minimum of 10µs to allow the PLL to lock to the
new frequency. Alternatively, the PD pin may be set low while changing frequencies.
IDT™ SPREAD SPECTRUM MULTIPLIER CLOCK
2
MK1714-02 REV K 051310



Part Number MK1714-02
Description Spread Spectrum Multiplier Clock
Maker Renesas
Total Page 3 Pages
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MK1714-02 Datasheet PDF





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