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Rainbow Electronics W24256 User Manual

Page 4

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Preliminary W24256

- 4 -

AC Characteristics, continued

(V

DD

= 5V

±

10%; V

SS

= 0V; T

A

= 0

°

C to 70

°

C)

Read Cycle

PARAMETER SYM.

W24256-70L/LL UNIT

MIN.

MAX.

Read Cycle Time

T

RC

70

-

nS

Address Access Time

T

AA

- 70 nS

Chip Select Access Time

T

ACS

- 70 nS

Output Enable to Output Valid

T

AOE

-

30 nS

Chip Selection to Output in Low Z

T

CLZ

* 5

-

nS

Output Enable to Output in Low Z

T

OLZ

* 5

-

nS

Chip Deselection to Output in High Z

T

CHZ

* -

20 nS

Output Disable to Output in High Z

T

OHZ

* -

20 nS

Output Hold from Address Change

T

OH

3

- nS

These parameters are sampled but not 100% tested

Write Cycle

PARAMETER SYM.

W24256-70L/LL UNIT

MIN.

MAX.

Write Cycle Time

T

WC

70

-

nS

Chip Selection to End of Write

T

CW

70

-

nS

Address Valid to End of Write

T

AW

70

-

nS

Address Setup Time

T

AS

0

- nS

Write Pulse Width

T

WP

50

-

nS

Write Recovery Time

CS, WE

T

WR

0

- nS

Data Valid to End of Write

T

DW

30

-

nS

Data Hold from End of Write

T

DH

0

- nS

Write to Output in High Z

T

WHZ

* -

25 nS

Output Disable to Output in High Z

T

OHZ

* -

30 nS

Output Active from End of Write

T

OW

5

- nS

These parameters are sampled but not 100% tested