WE128K32-XXX Просмотр технического описания (PDF) - White Electronic Designs Corporation
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WE128K32-XXX Datasheet PDF : 14 Pages
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White Electronic Designs
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.
Read Cycle Parameter
Read Cycle Time
Address Access Time
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
AC READ CHARACTERISTICS
VCC = 5.0V, GND = 0V, -55°C ≤ TA ≤ +125°C
Symbol
tRC
tACC
tACS
tOH
tOE
tDF
-120
Min Max
120
120
120
0
0 50
60
-140
Min Max
140
140
140
0
0 55
70
-150
Min Max
150
150
150
0
0 55
70
-200
Min Max
200
200
200
0
0 55
70
-250
Min Max
250
250
250
0
0 85
70
-300
Unit
Min Max
300
ns
300 ns
300 ns
0
ns
0 85 ns
70 ns
FIGURE 7 – READ WAVEFORMS
ADDRESS
t RC
ADDRESS VALID
CS#
OE#
OUTPUT
t ACS
t OE
t ACC
HIGH Z
t DF
t OH
OUTPUT
VALID
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.
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
March 2006
Rev. 10
6
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
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