M48Z58, M48Z58Y

Operating modes

9/23

Figure 5.

Read mode AC waveforms

Note:

WRITE Enable (W) = High.

Table 3.

Read mode AC characteristics

2.2

Write mode

The M48Z58/Y is in the WRITE Mode whenever W and E are low. The start of a WRITE is

referenced from the latter occurring falling edge of W or E. A WRITE is terminated by the

earlier rising edge of W or E. The addresses must be held valid throughout the cycle. E or W

WRITE cycles to avoid bus contention; although, if the output bus has been activated by a

Symbol

1.

M48Z58/Y

Unit

Min

Max

READ cycle time

70

ns

Address valid to output valid

70

ns

Chip enable low to output valid

70

ns

Output enable low to output valid

35

ns

(2)

2.

Chip enable low to output transition

5

ns

(2)

Output enable low to output transition

5

ns

(2)

Chip enable high to output Hi-Z

25

ns

(2)

Output enable high to output Hi-Z

25

ns

Address transition to output transition

10

ns

AI01385

tAVAV

tAVQV

tAXQX

tELQV

tELQX

tEHQZ

tGLQV

tGLQX

tGHQZ

VALID

A0-A12

E

G

DQ0-DQ7

VALID