TIBPAL20L8-7C Datasheet, PDF (16/20 Pages) Texas Instruments – HIGH-PERFORMANCE IMPACT-X E PAL CIRCUITS

TIBPAL20L8-7C, TIBPAL20R4-7C, TIBPAL20R6-7C, TIBPAL20R8-7C
TIBPAL20L8-10M, TIBPAL20R4-10M, TIBPAL20R6-10M, TIBPAL20R8-10M
HIGH-PERFORMANCE IMPACT-X ™ PAL^® CIRCUITS
SRPS005D – D3307, OCTOBER 1989 – REVISED NOVEMBER 1995
f_max SPECIFICATIONS
f_max 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. f_max With External Feedback
16
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265