XM20C64 datasheet(5/11 Pages) XICOR

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XM20C64

A.C. CHARACTERISTICS (Over the recommended operating conditions unless otherwise specified)

Read Cycle Limits

Limits

Symbol

Parameter

Min.

Max.

Units

tRC

Read Cycle Time

tCE

Chip Enable Access Time

tAA

Address Access Time

tOE

Output Enable Access Time

tLZ(3)

CE Low to Output in Low Z

tOLZ(3)

OE Low to Output in Low Z

tHZ(3)

CE High to Output in Low Z

tOHZ(3)

OE High to Output in Low Z

tOH

Output Hold

3874 PGM T03

MODE SELECTION

Mode

I/O State

Power

Module Not Selected

High Z

Standby

Read RAM Active

Data Output

Active

Write RAM

Data Input

Active

Issue Software Command

Data Input

Active

Output Disabled

High Z

Active

Hardware Array Recall

High Z

Active

No Operation

High Z

Active

Not Allowed

High Z

Active

3874 PGM T04.1

Read Cycle Timing Diagram

3874 FHD F05

Note:

(3) tLZ min., tHZ min., tOLZ min., and tOHZ min. are periodically sampled and not 100% tested. tHZ max. and tOHZ max. are

measured from the point when

CE or OE return high (whichever occurs first) to the time when the outputs are no longer driven.

tCE

tRC

ADDRESS

tOE

tLZ

tOLZ

tOH

tAA

tHZ

tOHZ

I/O

tOE

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