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TIBPAL16L8-5C Datasheet, PDF (19/30 Pages) Texas Instruments – HIGH-PERFORMANCE IMPACT-X E PAL CIRCUITS
TIBPAL16R4-5C, TIBPAL16R6-5C, TIBPAL16R8-5C
TIBPAL16R4-7M, TIBPAL16R6-7M, TIBPAL16R8-7M
HIGH-PERFORMANCE IMPACT-X ™ PAL® CIRCUITS
SRPS011D – D3359, OCTOBER 1989 – REVISED SEPTEMBER 1992
fmax SPECIFICATIONS
fmax with external feedback (see Figure 5)
This configuration is a typical state-machine design with feedback signals sent off-chip. This external feedback
could go back to the device inputs or to a second device in a multi-chip state machine. The slowest path defining
the period is the sum of the clock-to-output time and the input setup time for the external signals
+ ) * * (tsu + tpd CLK-to-Q).
Thus, fmax with external feedback
(tsu
1
tpd CLK
to
Q).
CLK
Logic
Array
C1
1D
Next Device
tsu
tpd CLK - to - Q
tsu
Figure 5. fmax With External Feedback
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