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CAT28LV256GI-30T Datasheet(PDF) 6 Page - ON Semiconductor

Part # CAT28LV256GI-30T
Description  256K-Bit CMOS PARALLEL EEPROM
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

CAT28LV256GI-30T Datasheet(HTML) 6 Page - ON Semiconductor

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CAT28LV256
6
Doc. No. MD-1071, Rev. E
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
ADDRESS
CE
OE
WE
DATA OUT
tAS
DATA IN
DATA VALID
HIGH-Z
tCS
tAH
tCH
tWC
tOEH
tBLC
tDH
tDS
tOES
tWP
ADDRESS
CE
OE
WE
tRC
DATA OUT
DATA VALID
DATA VALID
tCE
tOE
tOH
tAA
tOHZ
tHZ
VIH
HIGH-Z
tLZ
tOLZ
DEVICE OPERATION
Read
Data stored in the CAT28LV256 is transferred to the
data bus when
WE is held high, and both OE and CE are
held low. The data bus is set to a high impedance state
when either
CE or OE goes high. This 2-line control
architecture can be used to eliminate bus contention in
a system environment.
Byte Write
A write cycle is executed when both
CE and WE are low,
and
OE is high. Write cycles can be initiated using either
WE or CE, with the address input being latched on the
falling edge of
WE or CE, whichever occurs last. Data,
conversely, is latched on the rising edge of
WE or CE,
whichever occurs first. Once initiated, a byte write cycle
automatically erases the addressed byte and the new
data is written within 10 ms.
Figure 3. Read Cycle
28LV256 F06
Figure 4. Byte Write Cycle [
WE
WE
WE
WE
WE Controlled]
28LV256 F07


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