M48T251Y datasheet(9/24 Pages) STMICROELECTRONICS

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M48T251Y, M48T251V

Table 3. Memory AC Characteristics, M48T251Y

Note: 1. Valid for Ambient Operating Temperature: TA = 0 to 70°C; VCC = 4.5 to 5.5V or 3.0 to 3.6V (except where noted).

2. These parameters are sampled with a 5 pF load are not 100% tested.

3. tWP is specified as the logical AND of CE and WE. tWP is measured from the latter of CE or WE going low to the earlier of CE or

WE going high.

4. tDH and tDS are measured from the earlier of CE or WE going high.

Symbol

Parameter(1)

M48T251Y–70

Unit

Min

Max

tAVAV

tRC

READ Cycle Time

tAVQV

tACC

Access Time

tELQV

tCO

Chip Enable Low to Output Valid

tGLQV

tOE

Output Enable Low to Output Valid

tELQX

tGLQX

tCOE

Chip Enable or Output Enable Low to Output Transition

tAXQX

tOH

Output Hold from Address Change

tEHQZ

tGHQZ

tOD

(2)

Chip Enable or Output Enable High to Output Hi-Z

tWLQZ

tODW

(2)

Output Hi-Z from WE

tAVAV

tWC

WRITE Cycle Time

tWLWH

tELEH

tWP

(3)

WE, CE Pulse Width

tAVEL

tAVWL

tAW

Address Setup Time

tEHAX

tWR1

WRITE Recovery Time

tWHAX

tWR2

Address Hold Time from WE

0ns

tWHQX

tOEW

Output Active from WE

5ns

tDVEH

tDVWH

tDS

(4)

Data Setup Time

tWHDX

tDH1

(4)

Data Hold Time from WE

0ns

tEHDX

tDH2

(4)

Data Hold Time from CE

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