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M68AW256M

Table 7. Read and Standby Mode AC Characteristics

any given device.

3. These parameters are defined as the time at which the outputs achieve the open circuit conditions and are not referenced to output

voltage levels.

4. Tested initially and after any design or process changes that may affect these parameters.

Symbol

Parameter

M68AW256M

Unit

55

70

Read Cycle Time

Min

55

70

ns

Address Valid to Output Valid

Max

55

70

ns

(1)

Data hold from address change

Min

5

5

ns

(2,3)

Upper/Lower Byte Enable High to Output Hi-Z

Max

20

25

ns

Upper/Lower Byte Enable Low to Output Valid

Max

55

70

ns

(1)

Upper/Lower Byte Enable Low to Output Transition

Min

5

5

ns

(2,3)

Chip Enable High to Output Hi-Z

Max

20

25

ns

Chip Enable Low to Output Valid

Max

55

70

ns

(1)

Chip Enable Low to Output Transition

Min

5

5

ns

(2,3)

Output Enable High to Output Hi-Z

Max

20

25

ns

Output Enable Low to Output Valid

Max

25

35

ns

(2)

Output Enable Low to Output Transition

Min

5

5

ns

(4)

Chip Enable or UB/LB High to Power Down

Max

0

0

ns

(4)

Chip Enable or UB/LB Low to Power Up

Min

55

70

ns