ICS290
TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER
EPROM CLOCK SYNTHESIZER
Pin Assignment
GND
S0
S1
VDD
CLK1
CLK2
CLK3
CLK4
GND
X1/ICLK
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
S2
VDD
PDTS
GND
CLK8
CLK7
CLK6
CLK5
VDD
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
Connect to ground.
Pin Description
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.
IDT™ / ICS™
TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER 2
ICS290
REV E 041207
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
