November 2006
rev 1.5
Block Diagram
FBK
PLL
MUX
ASM5P23S08A
/2
REF
/2
CLKA1
Extra Divider (-5H)
Extra Divider (-3, -4)
CLKA2
CLKA3
CLKA4
S2
Select Input
Decoding
S1
/2
CLKB1
Extra Divider (-2, -3)
CLKB2
CLKB3
CLKB4
ASM5P23S08A
Select Input Decoding for ASM5P23S08A
S2
0
0
1
1
S1
0
1
0
1
Clock A1 - A4
Three-state
Driven
Driven
1
Driven
Clock B1 - B4
Three-state
Three-state
Driven
Driven
Output Source
PLL
PLL
Reference
PLL
PLL Shut-Down
Y
N
Y
N
ASM5P23S08A Configurations
Device
ASM5P23S08A-1
ASM5P23S08A-1H
ASM5P23S08A-2
ASM5P23S08A-2
ASM5P23S08A-3
ASM5P23S08A-3
ASM5P23S08A-4
ASM5P23S08A-5H
Feedback From
Bank A or Bank B
Bank A or Bank B
Bank A
Bank B
Bank A
Bank B
Bank A or Bank B
Bank A or Bank B
Bank A Frequency
Reference
Reference
Reference
2 X Reference
2 X Reference
4 X Reference
2 X Reference
Reference /2
Bank B Frequency
Reference
Reference
Reference /2
Reference
Reference or Reference
2
2 X Reference
2 X Reference
Reference /2
Note:
1. Outputs are non- inverted on 23S08A-2 and 23S08A-3 in bypass mode, S2 = 1 and S1 = 0.
2. Output phase is indeterminant (0° or 180° from input clock). If phase integrity is required, use the ASM5P23S08A-2.
3.3V ‘SpreadTrak’ Zero Delay Buffer
Notice: The information in this document is subject to change without notice.
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