參數(shù)資料
型號: HYB39S64800
廠商: SIEMENS AG
英文描述: 64 MBit Synchronous DRAM
中文描述: 64兆位同步DRAM
文件頁數(shù): 16/53頁
文件大?。?/td> 665K
代理商: HYB39S64800
Semiconductor Group
16
HYB39S64400/800/160AT(L)
64MBit Synchronous DRAM
AC Characteristics
1)2)
T
A
= 0 to 70
°
C;
V
SS
= 0 V;
Vdd
= 3.3 V
±
0.3 V,
t
T
= 1 ns
Parameter
Symbol
Limit Values
Unit
-8
-8B
-10
min.
max.
min.
max.
min.
max.
Clock and Clock Enable
Clock Cycle Time
CAS Latency = 3
CAS Latency = 2
t
CK
8
10
10
12
10
15
ns
ns
Clock Frequency
CAS Latency = 3
CAS Latency = 2
t
CK
125
100
100
83
100
66
MHz
MHz
Access Time from Clock
CAS Latency = 3
CAS Latency = 2
t
AC
6
6
6
7
7
8
ns
ns
2,
3
Clock High Pulse Width
t
CH
t
CL
t
T
3
3
3
ns
Clock Low Pulse Width
3
3
3
ns
Transition time
0.5
10
0.5
10
0.5
10
ns
Setup and Hold Times
Input Setup Time
t
IS
t
IH
t
CKS
t
CKH
t
RSC
t
SB
2
2
2.5
ns
4
Input Hold Time
1
1
1
ns
4
CKE Setup Time
2
2
2.5
ns
4
CKE Hold Time
1
1
1
ns
4
Mode Register Set-up time
16
20
20
ns
Power Down Mode Entry Time
0
8
0
10
0
10
ns
Common Parameters
Row to Column Delay Time
t
RCD
t
RP
t
RAS
t
RC
t
RRD
20
20
30
ns
5
Row Precharge Time
20
30
30
ns
5
Row Active Time
50
100k
60
100k
60
100k
ns
5
Row Cycle Time
70
80
90
ns
5
Activate(a) to Activate(b) Command
period
16
20
20
ns
5
CAS(a) to CAS(b) Command period
t
CCD
1
1
1
CLK
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