Specifications GAL20RA10B
AC Switching Characteristics
Over Recommended Operating Conditions
COM
-7
COM
-10
COM
-15
COM / IND
-20
COM
-30
TEST
COND1.
DESCRIPTION
PARAM.
UNITS
MIN. MAX.
MIN. MAX. MIN. MAX. MIN. MAX. MIN. MAX.
tpd
tco
A
A
Input or I/O to Combinatorial Output
Clock to Output Delay
2
2
7.5
9
2
2
10
11
—
—
—
—
—
15
15
—
—
—
—
—
20
20
—
—
—
—
—
30
30
—
—
—
ns
ns
tsu
—
—
A
Setup Time, Input or Fdbk before Clk↑
Hold Time, Input or Fdbk after Clk↑
3
—
—
—
4
7
10
3
20
ns
th
fmax3
2
3
3
10
ns
Maximum Clock Frequency with
External Feedback, 1/(tsu + tco)
83.3
66.7
45.0
33.3
20.0
MHz
A
Maximum Clock Frequency with
No Feedback
83.3
—
71.4
—
50.0
—
41.7
—
25.0
—
MHz
twh
twl
—
—
Clock Pulse Duration, High
Clock Pulse Duration, Low
6
6
—
—
7.5
5
7
7
—
—
10
9
10
10
—
—
—
15
10
15
10
10
—
—
15
12
15
—
—
—
—
—
12
12
—
—
—
20
12
20
15
15
—
—
20
15
20
—
—
—
—
—
20
20
—
—
—
20
20
30
25
25
—
—
30
20
30
—
—
—
—
—
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ten/tdis B,C
ten/tdis B,C
I or I/O to Output Enabled / Disabled
OE to Output Enabled / Disabled
Input or I/O to Async. Reset / Preset
Async. Reset / Preset Pulse Duration
Async. Reset / Preset Recovery Time
Preload Pulse Duration
—
—
—
6
—
—
—
10
7
tar/tap
tarw/tapw
tarr/tapr
twp
A
9
11
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
7
8
10
7
tsp
Preload Setup Time
5
thp
Preload Hold Time
5
7
1) Refer to Switching Test Conditions section.
2) Refer to fmax Descriptions 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.
7
LATTICE [ LATTICE SEMICONDUCTOR ]
