WE128K32-XXX
READ
The WE128K32-XXX 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.
AC READ CHARACTERISTICS
VCC = 5.0V, GND = 0V, -55°C ≤ TA ≤ +125°C*
-125
-140 -150
-200
-250
-300
Unit
Read Cycle Parameter
Read Cycle Time
Symbol
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
tRC
tACC
tACS
tOH
125
140
150
200
250
300
ns
ns
ns
ns
ns
ns
Address Access Time
125
125
140
140
150
150
200
200
250
250
300
300
Chip Select Access Time
Output Hold from Add. Change, OE# or CS#
Output Enable to Output Valid
Chip Select or OE# to High Z Output
0
0
0
0
0
0
0
0
0
0
0
0
tOE
50
60
55
70
55
70
55
70
85
70
85
70
tDF
FIGURE 7 – READ WAVEFORMS
t
RC
ADDRESS VALID
ADDRESS
CS#
OE#
t
ACS
t
OE
t
DF
t
ACC
t
OH
HIGH Z
OUTPUT
VALID
OUTPUT
Notes:
OE# may be delayed up to tACS - tOE after the falling edge of CS# without impact
on tOE or by tACC - tOE after an address change without impact on tACC.
6
4315.19E-0718-ss-WE128K32-XXX
Mercury Corp. - Memory and Storage Solutions • (602) 437-1520 • www.mrcy.com
MERCURY [ MERCURY UNITED ELECTRONICS INC ]
