ICS345 Datasheet, PDF (2/9 Pages) Integrated Circuit Systems – Triple PLL Field Programmable SS VersaClock Synthesizer

ICS345
TRIPLE PLL FIELD PROGRAMMABLE SS VERSACLOCK SYNTHESIZER
EPROM CLOCK SYNTHESIZER
Pin Assignment
X1/ICLK 1
S0 2
S1 3
CLK9 4
VDD 5
GND 6
CLK1 7
CLK2 8
CLK3 9
CLK4 10
20 X2
19 VDD
18 PDTS
17 S2
16 ^VDD
15 GND
14 CLK5
13 CLK6
12 CLK7
11 CLK8
20-pin (150 mil) SSOP (QSOP)
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
X1/ICLK
S0
S1
CLK9
VDD
GND
CLK1
CLK2
CLK3
CLK4
CLK8
CLK7
CLK6
CLK5
GND
VDD
S2
PDTS
VDD
X2
Pin
Type
XI
Input
Input
Output
Power
Power
Output
Output
Output
Output
Output
Output
Output
Output
Power
Power
Input
Input
Power
XO
Pin Description
Crystal input. Connect this pin to a crystal or external input clock.
Select pin 0. Internal pull-up resistor.
Select pin 1. Internal pull-up resistor.
Output clock 9. Weak internal pull-down when tri-state.
Connect to +3.3 V.
Connect to ground.
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.
Output clock 8. Weak internal pull-down when tri-state.
Output clock 7. Weak internal pull-down when tri-state.
Output clock 6. Weak internal pull-down when tri-state.
Output clock 5. Weak internal pull-down when tri-state.
Connect to ground.
Connect to +3.3 V.
Select pin 2. Internal pull-up resisitor.
Power-down tri-state. Powers down entire chip and tri-states clock outputs
when low. Internal pull-up resisitor.
Connect to +3.3 V.
Crystal Output. Connect this pin to a crystal. Float for clock input.
IDT™ / ICS™ TRIPLE PLL FIELD PROGRAMMABLE SS VERSACLOCK SYNTHESIZER 2
ICS345
REV K 110207