UD61256DC07 Просмотр технического описания (PDF) - Zentrum Mikroelektronik Dresden AG
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UD61256DC07 Datasheet PDF : 13 Pages
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UD61256
Dynamic Characteristics
F WRITE (continuation)
Write Command Set-up Time
Data Set-up Time ref. to CAS
Data Set-up Time ref. to W
Write Command Hold Time
Write Command to RAS Lead Time
Write Command to CAS Lead Time
Data Hold Time ref. to RAS
Data Hold Time ref. to CAS
Data Hold Time ref. to W
RAS to CAS Delay Time
CAS Hold Time
RAS Hold Time
F READ-WRITE
Read-Write Cycle Time
RAS Pulse Width
CAS Pulse Width
CAS Hold Time
RAS to WRITE Delay Time
CAS to WRITE Delay Time
Column to WRITE Delay Time
F FPM
Fast Page Mode Cycle Time
RAS Pulse Width
Access Time from CAS Precharge
F HIDDEN-REFRESH
Symbol
3)
Alt.
IEC
10)
11)
11)
tWCS
tDS
tDS
tWCH
tRWL
tCWL
tDHR
tDH
tDH
6)
tRCD
tCSH
tRSH
tsu(W-CAS)
tsu(D-CAS)
tsu(D-W)
th(CAS-W)
th(W-RAS)
th(W-CAS)
th(RAS-D)
th(CAS-D)
th(W-D)
tRASL-CASL
tRASL-CASH
tCASL-RASH
12)
tRWC
tRAS
tCAS
tCSH
10)
10)
10)
tRWD
tCWD
tAWD
tcRW
tw(RASL)RW
tw(CASL)RW
t(RASL-
CASH)RW
tRAS-W
tCAS-W
t(CA-W)RW
12)
tPC
tRASP
tCPA
tcPG
tw(RASL)
ta(CASH)
CAS Hold Time (CAS before RAS Cycle)
Remarks: see page 7
tCHR
tRASL-CASH
Min.
07
08
Max.
Unit
07
08
0
0
ns
0
0
ns
0
0
ns
15
15
ns
20
20
ns
20
20
ns
55
60
ns
15
15
ns
15
15
ns
20
20
50
60 ns
70
80
ns
20
20
ns
155
175
ns
95
105 10000 10000 ns
45
45 10000 10000 ns
95
105
ns
70
80
ns
20
20
ns
35
40
ns
50
50
ns
70
80 100000 100000 ns
35
40
ns
15
15
ns
6
December 12, 1997
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