M48T35_0708 datasheet(9/29 Pages) STMICROELECTRONICS

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M48T35 M48T35Y

Operation modes

9/29

If the Address Inputs are changed while E and G remain active, output data will remain valid

for Output Data Hold time (tAXQX) but will go indeterminate until the next Address Access.

Figure 5.

Read mode AC waveforms

Note:

WRITE Enable (W) = High.

Table 3.

Read mode AC characteristics

2.2

Write mode

The M48T35/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

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 or –40 to 85°C; VCC = 4.75 to 5.5V or 4.5 to 5.5V (except where

noted).

M48T35/Y

Unit

Min

Max

tAVAV

READ Cycle Time

tAVQV

Address Valid to Output Valid

tELQV

Chip Enable Low to Output Valid

tGLQV

Output Enable Low to Output Valid

tELQX

(2)

CL = 5pF.

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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