CAPACITANCE
1
Parameter
Symbol
CIN
COUT
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
1
R
-5
G
N AL
EW D
EV
D
ES IC
IG ES
N F
S O
Parameter Description
Parameter
Symbol
t
PD
t
S
t
H
t
CO
t
SKEWR
t
WL
t
WH
-7
Min
2
3
5
0
Max
7.5
Unit
ns
ns
ns
5
1
4
4
100
125
125
ns
ns
ns
ns
MHz
MHz
MHz
6
6
9
9
ns
ns
ns
ns
Min
2
1
Max
5
Input or Feedback to Combinatorial Output
Setup Time from Input or Feedback to Clock
Hold Time
Clock to Output
3
0
1
4
1
1
Skew Between Registered Outputs (Note 3)
LOW
Clock Width
3
HIGH
3
External Feedback
f
MAX
1/(t
S
+t
CO
)
142.8
166
Maximum Frequency
Internal Feedback (f
CNT
)
(Note 4)
No Feedback
OE to Output Enable
OE to Output Disable
1/(t
S
+t
CF
) (Note 5)
1/(t
WH
+t
WL
)
166
1
t
PZX
t
PXZ
t
EA
t
ER
6
5
6
5
1
1
3
3
Input to Output Enable Using Product Term Control
SE
1
2
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
.
12
U
Input to Output Disable Using Product Term Control
2
PALCE16V8H-5/7 (Com’l)
LATTICE [ LATTICE SEMICONDUCTOR ]
