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White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com

White Electronic Designs

WED7PxxxCFA70xxI25

July 2005

Rev. 1

White Electronic Designs Corp. reserves the right to change products or specifications without notice.

I/O Access Write AC Characteristics

SYMBOL

PARAMETER

MIN

MAX

UNIT

Data setup before IOWR#

60

—

ns

Data hold following IOWR#

30

—

IOWR# pulse width

165

—

Address setup before IOWR#

70

—

Address hold following IOWR#

20

—

CE# setup before IOWR#

5

—

CE# hold following IOWR#

20

—

REG# setup before IOWR#

5

—

REG# hold following IOWR#

0

—

IOIS16# delay failing from address

—

35

IOIS16# delay rising from address

—

35

Common Memory Access Read AC Characteristics

SYMBOL

PARAMETER

MIN

MAX

UNIT

OE# access time

—

125

ns

Output disable time (OE#)

—

100

Address setup time

30

—

Address hold time

20

—

CE# setup before OE#

0

—

OE# hold following OE#

20

—

Common Memory Access Write AC Characteristics

SYMBOL

PARAMETER

MIN

MAX

UNIT

Data setup before WE#

80

—

ns

Data hold following WE#

30

—

Write pulse width

150

—

Address hold time

20

—

Address setup time

30

—

CE# setup time

0

—

Write recover time

30

—

CE# hold following WE#

20

—