Specifications GAL20XV10
Switching Waveforms
INPUT or
I/O FEEDBACK
VALID INPUT
s u
INPUT or
I/O FEEDBACK
VALID INPUT
pd
t
th
t
CLK
t
c o
COMBINATORIAL
OUTPUT
REGISTERED
OUTPUT
1/
f
m a x
Combinatorial Output
(external fdbk)
Registered Output
INPUT or
I/O FEEDBACK
OE
dis
t
en
t
t
dis
ten
OUTPUT
OUTPUT
Input or I/O Feedback to Enable/Disable
OE to Output Enable/Disable
CLK
t
w l
t
w h
1/ max (internal fdbk)
f
CLK
cf
su
t
t
REGISTERED
FEEDBACK
fm a x
(w/o fdbk)
1/
Clock Width
fmax with Feedback
Input/Output Equivalent Schematics
PIN
PIN
Feedback
Active Pull-up
Circuit
Vcc
(Vref Typical = 3.2V)
Active Pull-up
Circuit
(Vref Typical = 3.2V)
Vcc
Tri-State
Control
Vref
Vcc
Vcc
Vref
ESD
Protection
Circuit
Data
Output
PIN
PIN
ESD
Protection
Circuit
Feedback
(To Input Buffer)
Typical Input
Typical Output
10
LATTICE [ LATTICE SEMICONDUCTOR ]
