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AS7C251MPFS18A-133TQI Datasheet(PDF) 11 Page - Alliance Semiconductor Corporation

Part # AS7C251MPFS18A-133TQI
Description  2.5V 1M x 18 pipelined burst synchronous SRAM
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Manufacturer  ALSC [Alliance Semiconductor Corporation]
Direct Link  https://www.alliancememory.com
Logo ALSC - Alliance Semiconductor Corporation

AS7C251MPFS18A-133TQI Datasheet(HTML) 11 Page - Alliance Semiconductor Corporation

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 11 / 19 page
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12/23/04, v. 2.2
Alliance Semiconductor
11 of 19
AS7C251MPFS18A
®
Key to switching waveforms
Timing waveform of read cycle
Note: Ý = XOR when LBO = high/no connect; Ý = ADD when LBO = low. BW[a:d] is don’t care.
don’t care
Falling input
Rising input
Undefined
CE1
tCYC
tCH
tCL
tADSPS
tADSPH
tAS
tAH
tWS
tADVS
tOH
CLK
ADSP
ADSC
Address
GWE, BWE
CE0, CE2
ADV
OE
Dout
tCSS
tHZC
tCD
tWH
tADVH
tHZOE
tADSCS
tADSCH
LOAD NEW ADDRESS
ADV inserts wait states
Q(A2Ý10)
Q(A2Ý11)
Q(A3)
Q(A2)
Q(A2Ý01)
Q(A3Ý01)
Q(A3Ý10)
Q(A1)
A2
A1
A3
tOE
tLZOE
tCSH
Read
Q(A1)
Suspend
Read
Q(A1)
Read
Q(A2)
Burst
Read
Q(A 2Ý01)
Read
Q(A3)
DSEL
Burst
Read
Q(A 2Ý10)
Suspend
Read
Q(A 2Ý10)
Burst
Read
Q(A 2Ý11)
Burst
Read
Q(A 3Ý01)
Burst
Read
Q(A 3Ý10)
Burst
Read
Q(A 3Ý11)


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