81C4256A-10 Просмотр технического описания (PDF) - Fujitsu
Номер в каталоге
Компоненты Описание
Список матч
81C4256A-10 Datasheet PDF : 29 Pages
| |||
MB81C4256A-60
MB81C4256A-70
MB81C4256A-80
MB81C4256A-10
Not Recommended for New Design
AC CHARACTERISTICS
(At recommended operating conditions unless otherwise noted) Notes 3, 4, 5
MB81C4256A-60 MB81C4256A-70 MB81C4256A-80 MB81C4256A-10
No.
Parameter
Notes Symbol
Unit
Min Max Min Max Min Max Min Max
1 Time Between Refresh
2 Random Read/Write Cycle Time
3 Read-Modify-Write Cycle Time
4 Access Time from RAS
5 Access Time from CAS
6 Column Address Access Time
7 Output Hold Time
8 Output Buffer Turn On Delay Time
9 Output Buffer Turn Off Delay Time
10 Transition Time
11 RAS Precharge Time
12 RAS Pulse Width
13 RAS Hold Time
14 CAS to RAS Precharge Time
15 RAS to CAS Delay Time
16 CAS PuIse Width
17 CAS Hold Time
18 CAS Precharge Time (C-B-R cycle)
19 Row Address Set Up Time
20 Row Address Hold Time
21 Column Address Set Up Time
22 Column Address Hold Time
23 RAS to Column Address Delay Time
24 Column Address to RAS Lead Time
25 Read Command Set Up Time
26
Read Command Hold Time
Referenced to RAS
6, 9
7, 9
8, 9
10
11,12
19
13
14
tREF
tRC
tRWC
tRAC
tCAC
tAA
tOH
tON
tOFF
tT
tRP
tRAS
tRSH
tCRP
tRCD
tCAS
tCSH
tCPN
tASR
tRAH
tASC
tCAH
tRAD
tRAL
tRCS
tRRH
—
8.2
—
8.2
—
8.2
—
8.2 ms
110
—
125
—
140
—
170
—
ns
150
—
165
—
190
—
230
—
ns
—
60
—
70
—
80
—
100 ns
—
15
—
20
—
20
—
25 ns
—
30
—
35
—
40
—
50 ns
0
—
0
—
0
—
0
—
ns
0
—
0
—
0
—
0
—
ns
—
15
—
15
—
20
—
20 ns
2
50
2
50
2
50
2
50 ns
40
—
45
—
50
—
60
—
ns
60 100000 70 100000 80 100000 100 100000 ns
15
—
20
—
20
—
25
—
ns
0
—
0
—
0
—
0
—
ns
20
45
20
50
20
60
25
75 ns
15
—
20
—
20
—
25
—
ns
60
—
70
—
80
—
100
—
ns
10
—
10
—
10
—
10
—
ns
0
—
0
—
0
—
0
—
ns
10
—
10
—
10
—
15
—
ns
0
—
0
—
0
—
0
—
ns
12
—
12
—
15
—
15
—
ns
15
30
15
35
15
40
20
50 ns
30
—
35
—
40
—
50
—
ns
0
—
0
—
0
—
0
—
ns
0
—
0
—
0
—
0
—
ns
27
Read Command Hold Time
Referenced to CAS
14
tRCH
0
—
0
—
0
—
0
—
ns
28 Write Command Set Up Time
15
tWCS
0
—
0
—
0
—
0
—
ns
29 Write Command HoId Time
tWCH
10
—
10
—
12
—
15
—
ns
30 WE Pulse Width
tWP
10
—
10
—
12
—
15
—
ns
31 Write Command to RAS Lead Time
tRWL
15
—
15
—
20
—
25
—
ns
32 Write Command to CAS Lead Time
tCWL
12
—
12
—
15
—
20
—
ns
33 DIN Set Up Time
tDS
0
—
0
—
0
—
0
—
ns
34 DIN Hold Time
tDH
10
—
10
—
12
—
15
—
ns
6
Share Link: 