White Electronic Designs
AC CHARACTERISTICS
V
CC
= 3.3 V ± 5%, 5 V ± 0.5V, -40°C ≤ T
A
≤ 85°C
WED7PxxxCFA70xxI25
Attribute Memory Read AC Characteristics
SYMBOL
t
C
t
A
t
A
t
A
t
DIS
t
DIS
t
EN
t
EN
t
V
t
SU
PARAMETER
Read cycle time
Address access time
CE# access time
OE# access time
Output disable time (CE#)
Output disable time (OE#)
Output enable time (CE#)
Output enable time (OE#)
Data valid time (A)
Address setup time
MIN
250
—
—
—
—
—
5
5
0
30
MAX
—
250
250
125
100
100
—
—
—
—
UNIT
ns
Attribute Memory Write AC Characteristics
SYMBOL
t
C
t
W
t
SU
t
SU
t
H
t
REC
PARAMETER
Write cycle time
Write pulse time
Address setup time
Data setup time (-WE)
Data hold time
Write recover time
MIN
250
150
30
80
30
30
MAX
—
—
—
—
—
—
UNIT
ns
I/O Access Read AC Characteristics
SYMBOL
t
D
t
H
t
W
t
SU
A
t
H
A
t
SU
CE
t
H
CE
t
SU
REG
t
H
REG
t
DF
INPACK
t
DR
INPACK
t
DF
IOIS1
6
t
DR
IOIS16
PARAMETER
Data delay after IORD#
Data hold following IORD#
IORD# pulse width
Address setup before IORD#
Address hold following IORD#
CE# setup before IORD#
CE# hold following IORD#
REG# setup before IORD#
REG# hold following -IORD
INPACK# delay failing from IORD#
INPACK# delay rising from IORD#
IOIS#16 delay failing from address
IOIS#16 delay rising from address
MIN
—
0
165
70
20
5
20
5
0
0
—
—
—
MAX
100
—
—
—
—
—
—
—
—
45
45
35
35
UNIT
ns
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
July 2005
Rev. 1
8
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
WEDC [ WHITE ELECTRONIC DESIGNS CORPORATION ]
