ISPGAL22V10 LATTICE [Lattice Semiconductor], ISPGAL22V10 Datasheet - Page 9
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ISPGAL22V10
Manufacturer Part Number
ISPGAL22V10
Description
In-System Programmable E2CMOS PLD
Manufacturer
LATTICE [Lattice Semiconductor]
Datasheet
1.ISPGAL22V10.pdf
(15 pages)
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3-state levels are measured 0.5V from steady-state active
level.
Output Load Conditions (see figure)
fmax DESCRIPTIONS
Input Pulse Levels
Input Rise and Fall Times
Input Timing Reference Levels
Output Timing Reference Levels
Output Load
SWITCHING TEST CONDITIONS
Test Condition
A
B
C
Active High
Active Low
Active High
Active Low
f
max with External Feedback 1/(
Note: fmax with external feedback is cal-
culated 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%.
L O G I C
A R R A Y
LOGIC
ARRAY
t
su +
f
max with No Feedback
t
s u
t
h
300
300
300
R
1
REGISTER
R EG I S T E R
CLK
C L K
390
390
390
390
390
R
3ns 10% – 90%
2
t
GND to 3.0V
See Figure
su+
t
c o
1.5V
1.5V
t
co)
50pF
50pF
50pF
5pF
5pF
C
L
9
FROM OUTPUT (O/Q)
UNDER TEST
Specifications ispGAL22V10
*C
Note: tcf is a calculated value, derived by sub-
tracting 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 combi-
natorial output is equal to tcf + tpd.
L
f
INCLUDES TEST FIXTURE AND PROBE CAPACITANCE
max with Internal Feedback 1/(
LOGIC
ARRAY
R
2
t
cf
+5V
t
pd
REGISTER
CLK
R
1
t
su+
C *
L
t
cf)
TEST POINT