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Renesas Electronics Components Datasheet

MK1707 Datasheet

LOW EMI CLOCK GENERATOR

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LOW EMI CLOCK GENERATOR
DATASHEET
MK1707
Description
The MK1707 generates a low EMI output clock from a clock
input. The part is designed to dither the LCD interface clock
for flat panel graphics controllers. The device uses IDT’s
proprietary mix of analog and digital Phase Locked Loop
(PLL) technology to spread the frequency spectrum of the
output, thereby reducing the frequency amplitude peaks by
several dB.
The MK1707 offers both centered and down spread from a
high speed clock input. Refer to the MK1714-01/02 for a
crystal input and the widest selection of input frequencies
and multipliers.
IDT offers many other clocks for computers and computer
peripherals. Consult us when you need to remove crystals
and oscillators from your board.
Features
Packaged in 8-pin SOIC
Pb-free package
Industrial temperature range available
Provides a spread spectrum output clock
Supports ATI’s flat panel controllers
Guaranteed to +85° C operation
Accepts a clock input, provides same frequency dithered
output
Good for all VGA modes from 80 to 167 MHz
Peak reduction by 7dB - 14dB typical on 3rd - 19th odd
harmonics
Low EMI feature can be disabled
Includes Power-down
Operating voltage of 3.3 V or 5 V
Advanced, low-power CMOS process
Block Diagram
VDD
2
S1:0
Spread Direction
Low EMI Enable
ICLK
Input
Buffer
PLL Clock
Synthesis
and Spread
Spectrum
Circuitry
Clock Out
GND
IDT® LOW EMI CLOCK GENERATOR
1
MK1707
REV L 072312


Renesas Electronics Components Datasheet

MK1707 Datasheet

LOW EMI CLOCK GENERATOR

No Preview Available !

MK1707
LOW EMI CLOCK GENERATOR
SSCG
Pin Assignment
Spread Direction and Percentage
Select Table
ICLK 1
VDD 2
GND 3
CLK 4
8 SD
7 S1
6 S0
5 LEE
8 pin (150 mil) SOIC
Pin Descriptions
SD S1 S0
Pin 8 Pin 7 Pin 6
0
0
0
0
0
M
0
0
1
0
M
0
0
M
M
0
M
1
0
1
0
0
1
M
0
1
1
1
0
0
1
0
M
1
0
1
1
M
0
1
M
M
1
M
1
1
1
0
1
1
M
1
1
1
Spread
Direction
Down
Down
Down
Down Center
Down
Down Center
Down Center
Down
Power Down
Center
Center
Center
Center
Center
Center
Test
Center
Power Down
0 = connect to GND
M = unconnected (floating)
1 = connect directly to VDD
Spread
Percentage (%)
0.6
0.8
1.25
+0.5, -1.5
2
+0.5, -2.5
+0.5, -3
5
-
±0.35
±0.5
±0.7
±0.8
±1.1
±1.4
Test
±2.5
-
Pin
Number
1
2
3
4
5
6
7
8
Pin
Name
ICLK
VDD
GND
CLK
LEE
S0
S1
SD
Pin Type
Pin Description
Input
Power
Power
Output
Input
Input
Input
Input
Connect to graphics input clock.
Connect to +3.3 V.
Connect to ground.
Spread spectrum clock output per table above.
Low EMI enable. Turns on spread spectrum when high. Internal pull-up resistor.
Function select 0 input. Selects spread amount and direction per table above.
Internal mid-level.
Function select 1input. Selects spread amount and direction per table above.
Internal mid-level.
Spread direction select input. Selects the direction of spread per table above.
Internal pull-up resistor.
IDT® LOW EMI CLOCK GENERATOR
2
MK1707
REV L 072312



Part Number MK1707
Description LOW EMI CLOCK GENERATOR
Maker Renesas
Total Page 3 Pages
PDF Download

MK1707 Datasheet PDF





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