A1280A Actel, A1280A Datasheet - Page 8

• Manufacturer Part Number: A1280A
• Description: (A1225A - A1280A) FPGAs
• Manufacturer: Actel

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DataSheet
8
P ar am e t e r M ea s ur e m e nt
O ut put Buf f e r De lay s
In
A C T es t Lo ads
Inp ut Bu ffer D ela ys
PAD
V
4
OL
U
.com
(Used to measure propagation delay)
To the output under test
50%
t
DLH
V
PAD
Y
GND
CC
V
1.5 V
PAD
50%
OH
1.5 V
t
INYH
t
Load 1
DHL
3 V
GND
INBUF
1.5 V
V
50%
1.5 V
CC
t
INYL
50 pF
0 V
Y
50%
E
PAD
D
TRIBUFF
50%
V
t
ENZL
CC
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To the output under test
V
CC
E
1.5 V
V
50%
OL
v4.0
t
ENLZ
Modu le Del ay s
PAD
GND
S, A or B
(Used to measure rising/falling edges)
10%
To AC test loads (shown below)
Y
GND
Y
50%
t
PLH
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V
t
V
CC
50%
PHL
CC
Load 2
V
50%
E
50%
PAD
GND
CC
GND
R to V
R to GND for t
R = 1 kΩ
t
GND
50 pF
PHL
50%
A C T
t
ENZH
t
PLH
GND
V
S
A
B
CC
™
CC
50%
1.5 V
V
50%
2 F a m il y F P GA s
for t
OH
50%
V
PLZ
PHZ
CC
t
ENHZ
/t
/t
PZL
PZH
GND
Y
90%