Specifications GAL18V10
AC Switching Characteristics
Over Recommended Operating Conditions
COM
-20
COM
-15
TEST
DESCRIPTION
PARAMETER
UNITS
COND.1
MIN. MAX.
MIN. MAX.
tpd
tco
tcf2
tsu
th
A
A
Input or I/O to Combinatorial Output
Clock to Output Delay
—
—
—
10
15
10
7
—
—
—
12
20
12
10
—
ns
ns
ns
ns
—
—
Clock to Feedback Delay
Setup Time, Input or Feedback before Clock↑
Hold Time, Input or Feedback after Clock↑
—
—
0
—
—
0
—
—
ns
A
Maximum Clock Frequency with
External Feedback, 1/(tsu +tco)
50
41.6
MHz
fmax3
A
A
Maximum Clock Frequency with
Internal Feedback, 1/(tsu + tcf)
58.8
62.5
—
—
45.4
62.5
—
—
MHz
MHz
Maximum Clock Frequency with
No Feedback
twh
twl
—
—
B
Clock Pulse Duration, High
8
—
—
15
15
20
—
—
—
8
—
—
20
20
20
—
—
—
ns
ns
ns
ns
ns
ns
ns
ns
Clock Pulse Duration, Low
8
8
ten
tdis
tar
Input or I/O to Output Enabled
—
—
—
10
15
10
—
—
—
15
15
12
C
Input or I/O to Output Disabled
A
Input or I/O to Asynchronous Reset of Register
Asynchronous Reset Pulse Duration
Asynchronous Reset to Clock Recovery Time
Synchronous Preset to Clock Recovery Time
tarw
tarr
tspr
—
—
—
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
pF
TEST CONDITIONS
VCC = 5.0V, VI = 2.0V
VCC = 5.0V, VI/O = 2.0V
CI
8
CI/O
10
pF
*Characterized but not 100% tested.
9
LATTICE [ LATTICE SEMICONDUCTOR ]
