gal16lv8 Lattice Semiconductor Corp., gal16lv8 Datasheet - Page 15

• Manufacturer Part Number: gal16lv8
• Description: Gal Data Sheets Low Voltage E2 Cmos Pld Generic Array Logic?
• Manufacturer: Lattice Semiconductor Corp.

Note: fmax with external feedback is calculated from measured
tsu and tco.
Note: fmax with no feedback may be less than 1/(twh + twl). This
is to allow for a clock duty cycle of other than 50%.
f
max Descriptions
f
max with External Feedback 1/(
LOGIC
ARRAY
t
f
L O G I C
A R R A Y
su +
max with No Feedback
t
t
s u
h
REGISTER
R EG I S T E R
CLK
C L K
t
t
c o
su+
t
co)
15
Note: tcf is a calculated value, derived by subtracting tsu from
the period of fmax w/internal feedback (tcf = 1/fmax - tsu). The
value of tcf is used primarily when calculating the delay from
clocking a register to a combinatorial output (through registered
feedback), as shown above. For example, the timing from clock
to a combinatorial output is equal to tcf + tpd.
Specifications GAL16LV8
f
max with Internal Feedback 1/(
LOGIC
ARRAY
t
cf
t
pd
REGISTER
CLK
t
su+
t
cf)