IBM3229P2035
IBM Packet Routing Switch Serial Interface Converter
Advance
10.7 Line Termination
10.8 DASL and SYS_CLK
The DASL data inputs (DASL_X_TX, DASL_Y_TX) and the clock reference (SWITCH_X_CLK and
SWITCH_Y_CLK ) use differential HSTL EIA/JEDEC (EIA/JESD8-6) standard compliant I/O books. The
following figure gives the recommended termination for those receiver lines.
10.9
Figure 42: DASL Termination
51 Ohms +/- 5%
51 Ohms +/- 5%
100 pF
GND
The termination network must be placed within 2.5 cm of the receiver chip.
Note: For switch clock X/Y differential pair, both termination resistors must be directly connected to GND,
without the use of the 100 pF capacitor.
Appendix A: Data Aligned Serial Link (DASL)
Page 150 of 154
prssi.02.fm
March 1, 2001
IBM [ IBM ]
