SSpepceicfiicfiactaiotinosnsGGAAL1L61V68VB8
AC SWITCHING CHARACTERISTICS
Over Recommended Operating Conditions
COM
-7
COM / IND COM / IND
IND
-20
COM / IND
-25
-10
-15
TEST
COND1.
DESCRIPTION
PARAM.
UNITS
MIN. MAX. MIN. MAX. MIN. MAX. MIN. MAX.
MIN. MAX.
tpd
A
Input or I/O to
Comb. Output
8 outputs switching
1 output switching
3
7.5
7
3
10
—
3
15
—
3
20
—
3
25
—
ns
ns
—
—
—
—
—
tco
tcf2
tsu
th
A
Clock to Output Delay
2
—
7
5
3
2
7
6
2
10
8
2
11
9
2
12
10
—
ns
ns
ns
—
—
Clock to Feedback Delay
—
10
—
12
—
13
—
15
Setup Time, Input or Fdbk before Clk↑
Hold Time, Input or Fdbk after Clk↑
—
—
—
—
—
A
0
—
—
0
—
—
0
—
—
0
—
—
0
—
—
ns
Maximum Clock Frequency with
External Feedback, 1/(tsu + tco)
83.3
58.8
45.5
41.6
37
MHz
fmax3
A
A
Maximum Clock Frequency with
Internal Feedback, 1/(tsu + tcf)
100
100
—
—
62.5
62.5
—
—
50
—
—
45.4
50
—
—
40
—
—
MHz
MHz
Maximum Clock Frequency with
No Feedback
62.5
41.6
twh
twl
—
—
Clock Pulse Duration, High
Clock Pulse Duration, Low
5
5
—
—
8
8
—
—
8
8
—
—
10
10
—
—
12
12
—
—
ns
ns
ten
B
B
Input or I/O to Output Enabled
OE to Output Enabled
3
2
9
6
3
2
10
10
—
—
15
15
—
—
20
18
—
—
25
20
ns
ns
tdis
C
C
Input or I/O to Output Disabled
OE to Output Disabled
2
9
6
2
10
—
—
15
15
—
—
20
18
—
—
25
20
ns
ns
1.5
1.5 10
1) Refer to Switching Test Conditions section.
2) Calculated from fmax with internal feedback. Refer to fmax Descriptions section.
3) Refer to fmax Descriptions section.
CAPACITANCE (TA = 25°C, f = 1.0 MHz)
SYMBOL
PARAMETER
Input Capacitance
I/O Capacitance
MAXIMUM*
UNITS
TEST CONDITIONS
VCC = 5.0V, VI = 2.0V
VCC = 5.0V, VI/O = 2.0V
CI
8
8
pF
pF
CI/O
*Guaranteed but not 100% tested.
1996 Data Book
3-77
LATTICE [ LATTICE SEMICONDUCTOR ]
