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White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com

White Electronic Designs

WE512K16-XG4X

April 1999

Rev. 2

White Electronic Designs Corp. reserves the right to change products or specifications without notice.

ADDRESS

CS#

OE#

OUTPUT

READ

The module stores data at the memory location determined

by the address pins. When CS# and OE# are low and WE#

is high, this data is present on the outputs. When CS# and

OE# are high, the outputs are in a high impedance state.

This two line control prevents bus contention.

Notes:

CS1-4# are used as bank selects.

During reads, only one CSx# can be active at one time.

AC READ CHARACTERISTICS

Parameter

Symbol

-140

-150

-200

Unit

Min

Max

Min

Max

Min

Max

Read Cycle Time

trc

140

150

200

ns

Address Access Time

tacc

140

150

200

ns

Chip Select Access Time

tacs

140

150

200

ns

Output Hold from Address Change, OE# or CS#

toh

0

0

0

ns

Output Enable to Output Valid

toe

0

50

0

55

0

55

ns

Chip Select or OE# to High Z Output

tdf

50

70

70

ns

FIGURE 5 – READ WAVEFORMS