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

White Electronic Designs

EDI88128CS

February 2000

Rev. 10

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

30pF

480Ω

Vcc

Q

Figure 1

Figure 2

255Ω

5pF

480Ω

Vcc

Q

255Ω

AC TEST CONDITIONS

AC CHARACTERISTICS – READ CYCLE (15 to 20ns)

Parameter

Symbol

15ns*

17ns

20ns

Units

JEDEC

Alt.

Min

Max

Min

Max

Min

Max

Read Cycle Time

15

17

20

ns

Address Access Time

15

17

20

ns

Chip Enable Access Time

15

17

20

ns

Chip Enable to Output in Low Z (1)

333

ns

Chip Disable to Output in High Z (1)

8

8

10

ns

Output Hold from Address Change

000

ns

Output Enable to Output Valid

668

ns

Output Enable to Output in Low Z (1)

000

ns

Output Disable to Output in High Z(1)

668

ns

Chip Enable to Power Up (1)

000

ns

Chip Enable to Power Down (1)

15

17

20

ns

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

AC CHARACTERISTICS – READ CYCLE (25 to 55ns)

Symbol

25ns

35ns

45ns

55ns

Parameter

JEDEC

Alt.

Min

Max

Min

Max

Min

Max

Min

Max

Units

Read Cycle Time

25

35

45

55

ns

Address Access Time

25

35

45

55

ns

Chip Enable Access Time

25

35

45

55

ns

Chip Enable to Output in Low Z (1)

3333

ns

Chip Disable to Output in High Z (1)

12

20

20

20

ns

Output Hold from Address Change

0000

ns

Output Enable to Output Valid

10

15

20

25

ns

Output Enable to Output in Low Z (1)

0000

ns

Output Disable to Output in High Z(1)

10

15

20

20

ns

Chip Enable to Power Up (1)

0000

ns

Chip Enable to Power Down (1)

25

35

45

55

ns

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

Input Pulse Levels

Input Rise and Fall Times

5ns

Input and Output Timing Levels

1.5V

Output Load

Figure 1