E142AHF Datasheet, PDF (10/19 Pages) Semtech Corporation – Per Pin timing Deskew w 4x2 Cross Point Switch

Edge142
EDGE HIGH-PERFORMANCE PRODUCTS
Application Information (continued)
Driver Fan Out
The Edge142 is also designed to support the fanning
out and deskewing of driver data, driver enable, and load
e_Pn_INab_Dle_es_sig_cn_ra_ipls_tit_oo_nm_sultiple test heads. By controlling
the multiplexer and output enable signals, the signals
may be routed to either test head.
By using the Edge142 for timing calibration, the timing
generator can generate “pure” timing signals, regardless
of the timing errors associated with driving one test head
vs. another. Removing the need for the timing generator
to perform the deskew function, the restriction on
consecutive edges may be improved.
Data
Timing
Generator
Dvr Enable
Edge142
Mux Out 1
Out 1
Out 2
Mux Out 0
Edge 142 Functions
• Test Head to Test Head Deskew
– TG restrictions on edge
regeneration improved
• Driver Data vs. Enable Deskew
• Rising vs. Falling Edge Deskew
• Test Head Multiplexing
• Cable Driver
Performance Benefits
• Point to Point Routing on all
transmission lines
TEST HEAD 1
Channel N
Device Under
Test
TEST HEAD 2
Channel N
Device Under
Test
 2000 Semtech Corp.
10
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