S1

S0

CLK

0

0

x2

0

1

x5

M

0

x3

M

1

x3.33

1

0

x4

1

1

x2.5

ICS502

LOCO™ PLL Clock Multiplier

MDS 502 D

2

Revision 111000

Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126•(408) 295-9800tel • www.icst.com

Pin Assignment

1

8

2

3

4

7

6

5

X1/ICLK

VDD

GND

REF

X2

S1

S0

CLK

Number

Name

Type

Description

1

X1/ICLK

I

Crystal connection or clock input.

2

VDD

P

Connect to +3.3V or +5V.

3

GND

P

Connect to ground.

4

REF

O

Buffered crystal oscillator output clock.

5

CLK

O

Clock output per Table above.

6

S0

I

Select 0 for output clock. Connect to GND or VDD.

7

S1

TI

Select 1 for output clock. Connect to GND or VDD or float.

8

X2

O

Crystal connection. Leave unconnected for clock input.

Pin Descriptions

Key: I = Input, TI = Tri-Level Input, O = output, P = power supply connection

Clock Decoding Table (MHz)

Output

20

25

30

32

33.33

37.5

40

48

50

54

60

Input

10

10

10

16

10

15

20

16

20

13.5

20

Selection (S1, S0)

0, 0

1, 1

M, 0

0, 0

M, 1

1, 1

0, 0

M, 0

1, 1

1, 0

M, 0

Output

64

66.66

72

75

80

81

90

100

108

120

135

Input

16

20

24

15

20

27

27

20

27

24

27

Selection (S1, S0)

1, 0

M, 1

M, 0

0, 1

1, 0

M, 0

M, 1

0, 1

1, 0

0, 1

0, 1

Common Output Frequencies Examples (MHz)

0 = connect directly to ground.

1 = connect directly to VDD.

M = leave unconnected (floating).

Note that all of the above outputs are achieved by using an inexpensive 10MHz to 27MHz crystal.

Consult MicroClock/ICS on how to achieve other output frequencies.

Minimum input frequency for all

selections is per table on page 3.