SpSepceifcicifaictaiotinosnsGGALA2L22V21V01D0
AC Switching Characteristics
Over Recommended Operating Conditions
COM / IND COM / IND
IND
-20
COM / IND
-25
-10
-15
TEST
COND.1
DESCRIPTION
PARAM.
UNITS
MIN. MAX. MIN. MAX. MIN. MAX.
MIN. MAX.
tpd
tco
tcf2
A
A
Input or I/O to Comb. Output
Clock to Output Delay
1
1
10
7
3
2
15
8
3
2
20
10
8
3
25
15
13
ns
ns
ns
2
—
Clock to Feedback Delay
—
2.5
—
2.5
—
—
tsu
th
—
—
A
Setup Time, Input or Fdbk before Clk↑
Hold Time, Input or Fdbk after Clk↑
6
0
—
—
—
10
0
—
—
—
12
0
—
—
—
15
0
—
—
—
ns
ns
Maximum Clock Frequency with
External Feedback, 1/(tsu + tco)
83.3
55.5
41.6
33.3
MHz
fmax3
A
A
Maximum Clock Frequency with
Internal Feedback, 1/(tsu + tcf)
110
125
—
—
80
—
—
45.4
50
—
—
35.7
38.5
—
—
MHz
MHz
Maximum Clock Frequency with
No Feedback
83.3
twh
twl
—
—
B
Clock Pulse Duration, High
4
4
1
1
1
8
8
8
—
—
10
9
6
6
—
—
15
15
20
—
—
—
10
10
3
—
—
20
20
25
—
—
—
13
13
3
—
—
25
25
25
—
—
—
ns
ns
ns
ns
ns
ns
ns
ns
Clock Pulse Duration, Low
ten
tdis
tar
Input or I/O to Output Enabled
Input or I/O to Output Disabled
Input or I/O to Asynch. Reset of Reg.
Asynch. Reset Pulse Duration
Asynch. Reset to Clk↑ Recovery Time
Synch. Preset to Clk↑ Recovery Time
3
C
3
3
3
A
13
—
—
—
3
3
3
tarw
tarr
tspr
—
—
—
15
10
10
20
20
14
25
25
15
1) Refer to Switching Test Conditions section.
2) Calculated from fmax with internal feedback. Refer to fmax Description section.
3) Refer to fmax Description 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
*Characterized but not 100% tested.
9
LATTICE [ LATTICE SEMICONDUCTOR ]
