ICS290 Datasheet, PDF (2/8 Pages) Integrated Circuit Systems – Triple PLL Field Prog. Spread Spectrum Clock Synthesizer

PRELIMINARY INFORMATION
ICS290
Triple PLL Field Prog. Spread Spectrum Clock Synthesizer
Pin Assignment
GND 1
S0 2
S1 ³
VDD ⁴
CLK1 5
CLK2 ⁶
CLK3 ⁷
CLK4 ⁸
GND 9
X1/ICLK 10
20 S2
19 VDD
18 PDTS
17 GND
16 CLK8
15 _CLK7
14 _CLK6
13 _CLK5
12 VDD
11 X2
20 pin (173 mil) TSSOP
Pin Descriptions
Pin
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Pin
Name
GND
S0
S1
VDD
CLK1
CLK2
CLK3
CLK4
GND
X1/ICLK
X2
VDD
CLK5
CLK6
CLK7
CLK8
GND
PDTS
VDD
S2
Pin
Type
Power
Input
Input
Power
Output
Output
Output
Output
Power
XI
XO
Power
Output
Output
Output
Output
Power
Input
Power
Input
Pin Description
Connect to ground.
Select pin 0. Internal pull-up resistor.
Select pin 1. Internal pull-up resistor.
Connect to +3.3 V.
Output clock 1. Weak internal pull-down when tri-state.
Output clock 2. Weak internal pull-down when tri-state.
Output clock 3. Weak internal pull-down when tri-state.
Output clock 4. Weak internal pull-down when tri-state.
Connect to ground.
Crystal input. Connect this pin to a crystal or external input clock.
Crystal Output. Connect this pin to a crystal. Float for clock input.
Connect to +3.3 V.
Output clock 5. Weak internal pull-down when tri-state.
Output clock 6. Weak internal pull-down when tri-state.
Output clock 7. Weak internal pull-down when tri-state.
Output clock 8. Weak internal pull-down when tri-state.
Connect to ground.
Power-down tri-state. Powers down entire chip and tri-states clock outputs
when low. Internal pull-up resistor.
Connect to +3.3 V.
Select pin 2. Internal pull-up resistor.
MDS 290 C
2
Revision 062305
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