ics650-27 Integrated Device Technology, ics650-27 Datasheet - Page 3

• Manufacturer Part Number: ics650-27
• Description: Networking Clock Source
• Manufacturer: Integrated Device Technology

For a 25 MHz fundamental crystal or clock input, the following four tables apply:
A Clocks Select Table (outputs in MHz)
C Clocks Select Table (outputs in MHz)
For a 12.5 MHz fundamental crystal or clock input, the following four tables apply:
A Clocks Select Table (outputs in MHz)
C Clocks Select Table (outputs in MHz)
0 = connect directly to GND
M = leave unconnected (automatically self biases to VDD/2)
1 = connect directly to VDD
IDT™ / ICS™ NETWORKING CLOCK SOURCE
ICS650-27
NETWORKING CLOCK SOURCE
ASC1
ASC1
CCS
CCS
M
M
0
0
0
1
1
1
0
1
0
0
0
1
1
1
0
1
CLKC1
CLKC1
ASC0
ASC0
62.5
37.5
Test
Test
125
75
M
M
M
M
0
1
0
1
0
1
0
1
33.3333
66.6667
16.6667
33.3333
CLKA1
CLKC2
CLKA1
CLKC2
37.5
62.5
37.5
Test
Test
Test
Test
Test
Test
100
125
75
75
50
16.6667
33.3333
16.6667
off (low)
off (low)
off (low)
off (low)
CLKA2
CLKA2
8.3333
Test
Test
Test
Test
3
B Clocks Select Table (outputs in MHz)
Reference Output Clock Frequency (in MHz)
B Clocks Select Table (outputs in MHz)
Reference Output Clock Frequency (in MHz)
REFOUT
REFOUT
BSC1
BSC1
12.5
25
0
0
0
1
1
1
0
0
0
1
1
1
BSC0
BSC0
M
M
M
M
0
1
0
1
0
1
0
1
133.3333
66.6667
83.3333
33.3333
41.6667
66.6667
CLKB1
CLKB1
Test
Test
Test
Test
100
50
CLOCK SYNTHESIZER
ICS650-27
33.3333
41.6667
66.6667
16.6667
20.8333
33.3333
CLKB2
CLKB2
Test
Test
Test
Test
50
25
REV E 110409