A1240A-1CQ256B ACTEL [Actel Corporation], A1240A-1CQ256B Datasheet - Page 18

• Manufacturer Part Number: A1240A-1CQ256B
• Description: HiRel FPGAs
• Manufacturer: ACTEL [Actel Corporation]

Pa r a m et er M ea su r e m en t
O ut put B uffer D el ays
AC Test Load
Inpu t Buffe r De lay s
18
In
PAD
V
OL
(Used to measure propagation delay)
To the output under test
50%
t
DLH
V
PAD
Y
GND
CC
V
1.5V
50%
PAD
PAD
OH
1.5V
t
INYH
t
Load 1
DHL
3V
GND
INBUF
1.5V
V
50%
1.5V
CC
t
INYL
50 pF
0V
Y
50%
E
PAD
D
TRIBUFF
50%
V
t
ENZL
CC
V
To the output under test
CC
E
1.5V
V
50%
OL
Com b ina tor i al Macr o Del ay s
t
ENLZ
PAD
PAD To AC test loads (shown below)
S, A, or B
GND
(Used to measure rising/falling edges)
10%
Y
GND
Y
50%
t
PLH
V
t
V
CC
50%
PHL
CC
Load 2
V
50%
E
PAD
GND
50%
CC
GND
R to V
R to GND for t
R = 1 k
t
GND
50 pF
PHL
50%
t
ENZH
t
PLH
GND
S
A
B
V
CC
CC
50%
1.5V
V
50%
OH
for t
50%
V
PLZ
PHZ
CC
t
ENHZ
/t
PZL
/t
PZH
GND
Y
90%