IDTCSPT857 Integrated Device Technology, IDTCSPT857 Datasheet - Page 11

• Manufacturer Part Number: IDTCSPT857
• Description: 2.5v Phase Locked Loop Differential 1 10 Sdram Clock Driver
• Manufacturer: Integrated Device Technology

APPLICATION INFORMATION
NOTE:
1.
IDTCSPT857/A
2.5V PLL DIFFERENTIAL 1:10 SDRAM CLOCK DRIVER
Memory module vendors may need to adjust the feedback capacitive load in order to meet DDR SDRAM registered DIMM timing requirements.
CLK
CLK
CLK
CLK
C = 14pF
C = 14pF
C = 14pF
C = 14pF
(1)
(1)
R = 120
R = 120
R = 120
R = 120
Feedback path
Feedback path
FBIN
FBIN
FBIN
FBIN
CSPT857/A
CSPT857/A
Figure 10. Clock Structure 2
Figure 9. Clock Structure 1
Z = 60
Z = 60
8 more
Z = 60
Z = 60
8 more
11
~2.5"
~2.5"
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
~0.3"
~0.3"
~0.6" (split to terminator)
~0.6" (split to terminator)
SDRAM
SDRAM
SDRAM
SDRAM
SDRAM
SDRAM
Stacked
Stacked
R = 120
R = 120