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M48Z08, M48Z18

READ Mode

The M48Z08/18 is in the READ Mode whenever W

(WRITE Enable) is high and E (Chip Enable) is

low. The device architecture allows ripple-through

access of data from eight of 65,536 locations in the

static storage array. Thus, the unique address

specified by the 13 address inputs defines which

one of the 8,192 bytes of data is to be accessed.

Valid data will be available at the Data I/O pins

address input signal is stable, providing that the E

and G access times are also satisfied. If the E and

G access times are not met, valid data will be

available after the latter of the Chip Enable Access

The state of the eight three-state Data I/O signals

is controlled by E and G. If the outputs are activat-

puts are changed while E and G remain active,

output data will remain valid for Output Data Hold

address access.

Figure 5. READ Mode AC Waveforms

Note: WRITE Enable (W) = High.

Table 3. READ Mode AC Characteristics

Symbol

M48Z08/M48Z18

Unit

Min

Max

READ Cycle Time

100

ns

Address Valid to Output Valid

100

ns

Chip Enable Low to Output Valid

100

ns

Output Enable Low to Output Valid

50

ns

(2)

Chip Enable Low to Output Transition

10

ns

(2)

Output Enable Low to Output Transition

5

ns

(2)

Chip Enable High to Output Hi-Z

50

ns

(2)

Output Enable High to Output Hi-Z

40

ns

Address Transition to Output Transition

5

ns

AI01385

tAVAV

tAVQV

tAXQX

tELQV

tELQX

tEHQZ

tGLQV

tGLQX

tGHQZ

VALID

A0-A12

E

G

DQ0-DQ7

VALID