GAL18V10 Просмотр технического описания (PDF) - Lattice Semiconductor
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GAL18V10 Datasheet PDF : 14 Pages
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Specifications GAL18V10B
AC Switching Characteristics
Over Recommended Operating Conditions
PARAM.
TEST
COND.1
DESCRIPTION
tpd
A Input or I/O to Comb. Output
tco
A Clock to Output Delay
tcf2
— Clock to Feedback Delay
tsu
— Setup Time, Input or Fdbk before Clk↑
th
— Hold Time, Input or Fdbk after Clk↑
A Maximum Clock Frequency with
External Feedback, 1/(tsu + tco)
COM
COM
COM
COM
-7
-10
-15
-20
UNITS
MIN. MAX. MIN. MAX. MIN. MAX. MIN. MAX.
— 7.5 — 10 — 15 — 20 ns
— 5.5 — 7 — 10 — 12 ns
— 3.5 — 3.5 — 7 — 10 ns
5.5 — 6 — 8 — 12 — ns
0 — 0 — 0 — 0 — ns
90.9 — 76.9 — 55.5 — 41.6 — MHz
fmax3
A
Maximum Clock Frequency with
Internal Feedback, 1/(tsu + tcf)
111 — 105 — 66.7 — 45.4 — MHz
A Maximum Clock Frequency with
No Feedback
111 — 105 — 66.7 — 62.5 — MHz
twh
— Clock Pulse Duration, High
twl
— Clock Pulse Duration, Low
ten
B Input or I/O to Output Enabled
tdis
C Input or I/O to Output Disabled
tar
A Input or I/O to Asynch. Reset of Reg.
tarw — Asynch. Reset Pulse Duration
tarr
— Asynch. Reset to Clk↑ Recovery Time
tspr
— Synch. Preset to Clk↑ Recovery Time
4 — 4 — 6 — 8 — ns
4 — 4 — 6 — 8 — ns
— 8 — 10 — 15 — 20 ns
— 8 — 9 — 15 — 20 ns
— 13 — 13 — 20 — 20 ns
8 — 8 — 10 — 15 — ns
8 — 8 — 10 — 15 — ns
10 — 10 — 10 — 12 — ns
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
CI
Input Capacitance
CI/O
I/O Capacitance
*Characterized but not 100% tested.
MAXIMUM*
8
8
UNITS
pF
pF
TEST CONDITIONS
VCC = 5.0V, VI = 2.0V
VCC = 5.0V, VI/O = 2.0V
7
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