Specifications GAL18V10B
AC Switching Characteristics
Over Recommended Operating Conditions
COM
COM
-10
COM
-15
COM
-20
-7
TEST
COND.1
DESCRIPTION
PARAM.
UNITS
MIN. MAX.
MIN. MAX. MIN. MAX. MIN. MAX.
tpd
tco
tcf2
tsu
th
A
A
Input or I/O to Comb. Output
Clock to Output Delay
—
—
7.5
5.5
3.5
—
—
—
—
6
10
7
—
—
—
8
15
10
7
—
—
—
12
20
12
10
—
ns
ns
ns
ns
—
—
Clock to Feedback Delay
—
3.5
—
Setup Time, Input or Fdbk before Clk↑
Hold Time, Input or Fdbk after Clk↑
5.5
—
—
0
—
—
0
—
—
0
—
—
0
—
—
ns
A
Maximum Clock Frequency with
External Feedback, 1/(tsu + tco)
90.9
76.9
55.5
41.6
MHz
fmax3
A
A
Maximum Clock Frequency with
Internal Feedback, 1/(tsu + tcf)
111
111
—
—
105
105
—
—
66.7
66.7
—
—
45.4
62.5
—
—
MHz
MHz
Maximum Clock Frequency with
No Feedback
twh
twl
—
—
B
Clock Pulse Duration, High
4
4
—
—
8
4
4
—
—
10
9
6
—
—
15
15
20
—
—
—
8
—
—
20
20
20
—
—
—
ns
ns
ns
ns
ns
ns
ns
ns
Clock Pulse Duration, Low
6
8
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
—
—
—
8
—
—
—
8
—
—
—
10
10
10
—
—
—
15
15
12
C
8
A
13
—
—
—
13
—
—
—
tarw
tarr
tspr
—
—
—
8
8
10
10
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.
7
LATTICE [ LATTICE SEMICONDUCTOR ]
