SMJ4C1024-80FQ 查看數據表（PDF） - Austin Semiconductor
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SMJ4C1024-80FQ Datasheet PDF : 27 Pages
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SMJ4C1024
1048576 BY 1-BIT
DYNAMIC RANDOM-ACCESS MEMORY
SGMS023E – DECEMBER 1988 – REVISED MARCH 1996
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (see Note 5)
ALT.
SYMBOL
’4C1024-80
MIN MAX
’4C1024-10
MIN MAX
tc(rd)
Cycle time, read
(see Note 6)
tRC
150
190
tc(W)
Cycle time, write
tWC
150
190
Cycle time,
tc(rdW)
read-write/read-modify-write
tRWC
175
220
tc(P)
Cycle time, page-mode read
or write (see Note 7)
tPC
50
55
tc(PM)
Cycle time, page-mode
read-modify-write
tPRWC
75
85
tw(CH)
tw(CL)
Pulse duration, CAS high
Pulse duration, CAS low
(see Note 8)
tCP
tCAS
10
20 10 000
10
25 10 000
tw(RH)
Pulse duration, RAS high
(precharge)
tRP
60
80
tw(RL)
Pulse duration, nonpage
mode, RAS low
(see Note 9)
tRAS
80 10 000 100 10 000
tw(RL)P
Pulse duration, page mode,
RAS low (see Note 9)
tRASP
80 100 000 100 100 000
tw(WL) Pulse duration, write
tWP
15
15
tsu(CA)
Setup time, column address
before CAS low
tASC
0
3
tsu(RA)
Setup time, row address
before RAS low
tASR
0
0
tsu(D)
Setup time, data
(see Note 10)
tDS
0
0
Setup time, read before CAS
tsu(rd)
low
tRCS
0
0
tsu(WCL)
Setup time, W low before
CAS low (see Note 11)
tWCS
0
0
tsu(WCH)
Setup time, W low before
CAS high
tCWL
20
25
Setup time, W low before
tsu(WRH) RAS high
tRWL
20
25
th(CA)
Hold time, column address
after CAS low
tCAH
15
20
th(RA)
Hold time, row address after
RAS low
tRAH
12
15
NOTES: 5. Timing measurements in this table are referenced to VIL max and VIH min.
6. All cycle times assume tt = 5 ns.
7. To assure tc(P) min, tsu(CA) should be ≥ tw(CH).
8. In a read-modify-write cycle, td(CLWL) and tsu(WCH) must be observed.
9. In a read-modify-write cycle, td(RLWL) and tsu(WRH) must be observed.
10. Referenced to the later of CAS or W in write operations
11. Early write operation only
’4C1024-12
MIN MAX
220
220
265
65
110
15
30 10 000
90
120 10 000
120 100 000
20
3
0
0
0
0
30
30
20
15
’4C1024-15
MIN MAX
260
260
315
UNIT
ns
ns
ns
80
ns
135
ns
25
ns
40 10 000 ns
100
ns
150 10 000 ns
150 100 000 ns
25
ns
3
ns
0
ns
0
ns
0
ns
0
ns
40
ns
40
ns
25
ns
20
ns
8
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