ICS512 Datasheet, PDF (2/4 Pages) Integrated Circuit Systems – LOCO™ PLL Clock Multiplier

ICS512
LOCO™ PLL Clock Multiplier
Pin Assignment
X1/ICLK ¹
VDD ²
GND ³
REF ⁴
8 _X2
7 _S1
6 _S0
5 _CLK
Clock Output Table
S1 S0
CLK
0
0
4X input
0
M
5.333X input
0
1
5X input
M
0
2.5X input
M
M
2X input
M
1
3.333X input
1
0
6X input
1
M
3X input
1
1
8X input
0 = connect directly to ground.
1 = connect directly to VDD.
M = leave unconnected (floating).
Common Output Frequencies Examples (MHz)
Output
20
24
30
32
33.33 37.5
40
48
50
60
64
Input
10
12
10
16
16.66
15
10
12
20
10
16
Selection (S1, S0) M, M M, M 1, M M, M M, M M, 0
0, 0
0, 0
M, 0
1, 0
0, 0
Output
66.66
72
75
80
83.33
90
100
120
125 133.33 150
Input
20
12
25
10
25
15
20
15
25
25
25
Selection (S1, S0) M, 1
1, 0
1, M
1, 1
M, 1
1, 0
0, 1
1, 1
0, 1
0, M
1, 0
Note that all of the above outputs are achieved by using a common, inexpensive 10MHz to 25MHz crystal.
Consult ICS on how to achieve other output frequencies.
Pin Descriptions
Number
1
2
3
4
5
6
7
8
Name
X1/ICLK
VDD
GND
REF
CLK
S0
S1
X2
Type
XI
P
P
O
O
TI
TI
XO
Description
Crystal connection or clock input.
Connect to +3.3V or +5V.
Connect to ground.
Buffered crystal oscillator output clock.
Clock output per Table above.
Multiplier select pin 0. Connect to GND or VDD or float (no connection).
Multiplier select pin 1. Connect to GND or VDD or float (no connection).
Crystal connection. Leave unconnected for clock input.
Key: XI/XO = crystal connections, TI = tri-level input, O = output, P = power supply connection
MDS 512 C
2
Revision 061900
Printed 11/13/00
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