gal6002 Lattice Semiconductor Corp., gal6002 Datasheet - Page 12
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gal6002
Manufacturer Part Number
gal6002
Description
High Performance E2 Cmos Fpla Generic Array Logic?
Manufacturer
Lattice Semiconductor Corp.
Datasheet
1.GAL6002.pdf
(16 pages)
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Output Load Conditions (see figure)
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%.
3-state levels are measured 0.5V from steady-state active
level.
fmax Descriptions
Switching Test Conditions
Input Pulse Levels
Input Rise and Fall Times
Input Timing Reference Levels
Output Timing Reference Levels
Output Load
Test Condition
A
B
C
f
Active High
Active Low
Active High
Active Low
max with External Feedback 1/(
LOGIC
ARRAY
LOGIC
ARRAY
f
t
max with No Feedback
su
300
300
300
R
1
REGISTER
REGISTER
CLK
CLK
390
390
390
390
390
R
3ns 10% – 90%
2
t
GND to 3.0V
t
See Figure
co
su+
1.5V
1.5V
t
co)
50pF
50pF
50pF
5pF
5pF
C
L
12
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.
FROM OUTPUT (O/Q)
UNDER TEST
*C
f
L
max with Internal Feedback 1/(
INCLUDES TEST FIXTURE AND PROBE CAPACITANCE
Specifications GAL6002
LOGIC
ARRAY
R
2
t
cf
t
+5V
pd
REGISTER
CLK
R
1
t
C *
su+
L
TEST POINT
t
cf)