ICS650-07C datasheet(2/5 Pages) ICST

2 / 5 page

ICS650-07C

Networking Clock Source

MDS 650-07C A

Revision 101399

Printed 11/28/00

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

PRELIMINARY INFORMATION

0 = connect directly to GND

M = leave unconnected (automatically self biases to VDD/2)

1 = connect directly to VDD

ACS1

ACS0

CLKA1

CLKA2

100

off (low)

Test

off (low)

33.3333

16.6667

Test

66.6667

33.3333

A Clocks Select Table (outputs in MHz)

BCS1

BCS0

CLKB1

CLKB2

Test

66.6667

33.3333

100

83.3333

41.6667

Test

133.3333

66.6667

B Clocks Select Table (outputs in MHz)

CCS

CLKC1

CLKC2

125

Test

REFOUT

25 MHz

C Clocks Select Table (outputs in MHz)

For a 25 MHz fundamental crystal or clock input, the following four tables apply :

0 = connect directly to GND

M = leave unconnected (automatically self biases to VDD/2)

1 = connect directly to VDD

ACS1

ACS0

CLKA1

CLKA2

off (low)

Test

37.5

off (low)

16.6667

8.3333

Test

33.3333

16.6667

A Clocks Select Table (outputs in MHz)

BCS1

BCS0

CLKB1

CLKB2

Test

33.3333

16.6667

41.6667

20.8333

Test

66.6667

33.3333

B Clocks Select Table (outputs in MHz)

CCS

CLKC1

CLKC2

62.5

Test

37.5

REFOUT

12.5 MHz

C Clocks Select Table (outputs in MHz)

For a 12.5 MHz crystal or clock input, the following four tables apply :

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