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

White Electronic Designs

EDI88128C

April 2005

Rev. 17

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

Input Pulse Levels

Input Rise and Fall Times

5ns

Input and Output Timing Levels

1.5V

Output Load

Figure 1

AC Test Conditions

AC Characteristics – Read Cycle

Parameter

Symbol

70ns

85ns

100ns

Units

JEDEC

Alt.

Min

Max

Min

Max

Min

Max

Read Cycle Time

70

85

100

ns

Address Access Time

70

85

100

ns

Chip Select Access Time

70

85

100

ns

70

85

100

ns

Chip Select to Output in Low Z (1)

333

ns

333

ns

Chip Disable to Output in High Z (1)

30

30

30

ns

30

30

30

ns

Output Hold from Address Change

333

ns

Output Enable to Output Valid

25

30

50

ns

Output Enable to Output in Low Z (1)

000

ns

Output Disable to Output in High Z (1)

030030030

ns

1. This parameter is guaranteed by design but not tested.

30pF

480Ω

Vcc

Q

Figure 1

Figure 2

255Ω

5pF

480Ω

Vcc

Q

255Ω