CAPACITANCE
Parameter
Symbol
CIN
COUT
1
Parameter Description
Input Capacitance
Output Capacitance
VIN = 2.0 V
VOUT = 2.0 V
Test Conditions
VCC = 5.0 V, TA = 25
°
C,
f = 1 MHz
Typ
5
8
Unit
pF
pF
Note:
1. These parameters are not 100% tested, but are evaluated at initial characterization and at any time the design is modified where
capacitance may be affected.
SWITCHING CHARACTERISTICS OVER COMMERCIAL OPERATING RANGES
Parameter
Symbol
t
PD
t
S
t
H
t
CO
t
SKEWR
t
WL
t
WH
Maximum
Frequency
(Note 4)
-5
Parameter Description
Input or Feedback to Combinatorial Output
Setup Time from Input or Feedback to Clock
Hold Time
Clock to Output
Skew Between Registered Outputs (Note 3)
LOW
Clock Width
HIGH
External Feedback
f
MAX
Internal Feedback
(f
CNT
)
No Feedback
t
PZX
t
PXZ
t
EA
t
ER
OE to Output Enable
OE to Output Disable
Input to Output Enable Using Product Term Control
Input to Output Disable Using Product Term Control
1/(t
S
+t
CO
)
1/(t
S
+t
CF
) (Note 5)
1/(t
WH
+t
WL
)
3
142.8
166
166
1
1
2
2
6
5
6
5
4
100
125
125
1
1
3
3
6
6
9
9
6
66.7
71.4
83.3
2
2
3
3
10
10
10
10
ns
MHz
MHz
MHz
ns
ns
ns
ns
3
Min
2
1
3
0
1
4
1
4
Max
5
Min
2
3
5
0
1
5
1
6
-7
Max
7.5
Min
2
3
7.5
0
3
7.5
1
-10
Max
10
Unit
ns
ns
ns
ns
ns
ns
1
Notes:
1. See “Switching Test Circuit” for test conditions.
2. Output delay minimums for t
PD
, t
CO
, t
PZX
, t
PXZ
, t
EA
, and t
ER
are defined under best case conditions. Future process improvements
may alter these values; therefore, minimum values are recommended for simulation purposes only.
3. Skew testing takes into account pattern and switching direction differences between outputs that have equal loading.
4. These parameters are not 100% tested, but are calculated at initial characterization and at any time the design is modified where
frequency may be affected.
5. t
CF
is a calculated value and is not guaranteed. t
CF
can be found using the following equation:
t
CF
= 1/f
MAX
(internal feedback) – t
S
.
PALCE20V8H-5/7/10 (Com’l)
11
LATTICE [ LATTICE SEMICONDUCTOR ]
