PAC-SYSTEMCLK5520 Lattice, PAC-SYSTEMCLK5520 Datasheet - Page 8

• Manufacturer Part Number: PAC-SYSTEMCLK5520
• Description: Development Software ispCLK5520 Design Sys
• Manufacturer: Lattice

Specifications of PAC-SYSTEMCLK5520

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Lattice Semiconductor
Output Test Loads
Figures 3-5 show the equivalent termination loads used to measure rise/fall times, output timing adders and other
selected parameters as noted in the various tables of this data sheet.
Figure 3. CMOS Termination Load
Figure 4. HSTL/SSTL Termination Load
Figure 5. LVDS/LVPECL Termination Load
ispCLOCK
ispCLOCK
Zo = HSTL: ~20Ω
50Ω/3"
50Ω/3"
ispCLOCK
SSTL: 40Ω
50Ω/1"
50Ω/1"
Zo = 50Ω
50Ω/3"
(parasitic)
33.2Ω
33.2Ω
(parasitic)
Interface Circuit
50Ω/3"
3pF
3pF
50Ω/36"
44.2Ω
8
34Ω
34Ω
50Ω/36"
0.1U
0.1U
50Ω
ispClock5500 Family Data Sheet
950Ω
50Ω/36"
50Ω/36"
SCOPE
50Ω 5pF
950Ω
VTERM
ChA
ChB
SCOPE
50Ω 5pF
SCOPE
50Ω
50Ω
5pF
5pF