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WME128K8-250CQ Datasheet(PDF) 3 Page - White Electronic Designs Corporation

Part # WME128K8-250CQ
Description  128Kx8 CMOS MONOLITHIC EEPROM, SMD 5962-96796
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Manufacturer  WEDC [White Electronic Designs Corporation]
Direct Link  http://www.whiteedc.com
Logo WEDC - White Electronic Designs Corporation

WME128K8-250CQ Datasheet(HTML) 3 Page - White Electronic Designs Corporation

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White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
White Electronic Designs
WME128K8-XXX
January 2004
Rev. 5
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
READ
Figure 3 shows Read cycle waveforms. A read cycle begins
with selection address, chip select and output enable. Chip
select is accomplished by placing the CS# line low. Output
enable is done by placing the OE# line low. The memory
places the selected data byte on I/O0 through I/O7 after
the access time. The output of the memory is placed in a
high impedance state shortly after either the OE# line or
CS# line is returned to a high level.
FIGURE 3 – READ WAVEFORMS
t
ADDRESS
CS#
OE#
OUTPUT
OH
tDF
t ACC
t RC
t OE
tACS
OUTPUT
VALID
ADDRESS VALID
HIGH Z
NOTE:
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.
AC READ CHARACTERISTICS (See Figure 3)
VCC = 5.0V, VSS = 0V, -55°C ≤ TA ≤ +125°C
Read Cycle Parameter
Symbol
-120
-140
-150
-200
-250
-300
Unit
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Read Cycle Time
tRC
120
140
150
200
250
300
ns
Address Access Time
tACC
120
140
150
200
250
300
ns
Chip Select Access Time
tACS
120
140
150
200
250
300
ns
Output Hold from Address Change, OE# or CS#
tOH
000000
ns
Output Enable to Output Valid
tOE
050055055055085085
ns
Chip Select or OE# to High Z Output
tDF
60
70
70
70
70
70
ns


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