M48Z35AV datasheet(9/24 Pages) STMICROELECTRONICS

9 / 24 page

M48Z35AV

Operating modes

9/24

Figure 5.

Read mode AC waveforms

Note:

WRITE enable (W) = High.

Table 3.

Read mode AC characteristics

2.2

Write mode

The M48Z35AV 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

must return high for a minimum of tEHAX from Chip Enable or tWHAX from WRITE Enable

prior to the initiation of another READ or WRITE cycle. Data-in must be valid tDVWH prior to

the end of WRITE and remain valid for tWHDX afterward. G should be kept high during

Symbol

Parameter(1)

Valid for ambient operating temperature: TA = 0 to 70°C; VCC = 3.0 to 3.6V (except where noted).

M48Z35AV

Unit

–100

Min

Max

tAVAV

READ cycle time

100

tAVQV

Address valid to output valid

100

tELQV

Chip enable low to output valid

100

tGLQV

Output enable low to output valid

tELQX

(2)

CL = 5pF (see Figure 10 on page 15).

Chip enable low to output transition

tGLQX

(2)

Output enable low to output transition

tEHQZ

(2)

Chip enable high to output Hi-Z

tGHQZ

(2)

Output enable high to output Hi-Z

tAXQX

Address transition to output transition

AI00925

tAVAV

tAVQV

tAXQX

tELQV

tELQX

tEHQZ

tGLQV

tGLQX

tGHQZ

VALID

A0-A14

DQ0-DQ7

VALID

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