参数资料
型号: NT5DS64M4AW-75B
厂商: Electronic Theatre Controls, Inc.
英文描述: 256Mb Double Data Rate SDRAM
中文描述: 256MB双数据速率SDRAM
文件页数: 59/78页
文件大小: 1534K
代理商: NT5DS64M4AW-75B
NT5DS64M4AT NT5DS64M4AW
NT5DS32M8AT NT5DS32M8AW
256Mb Double Data Rate SDRAM
REV 1.1
12/2001
59
NANYA TECHNOLOGY CORP
. All rights reserved.
NANYA TECHNOLOGY CORP. reserves the right to change Products and Specifications without notice.
t
IPW
Input pulse width
2.2
2.2
ns
2-4, 12
t
RPRE
Read preamble
0.9
1.1
0.9
1.1
0.9
1.1
t
CK
1-4
t
RPST
Read postamble
0.40
0.60
0.40
0.60
0.40
0.60
t
CK
1-4
t
RAS
Active to Precharge command
45
120,000
45
120,000
50
120,000
ns
1-4
t
RC
Active to Active/Auto-refresh command period
65
65
70
ns
1-4
t
RFC
Auto-refresh to Active/Auto-refresh
command period
75
75
80
ns
1-4
t
RCD
Active to Read or Write delay
20
20
20
ns
1-4
t
RAP
Active to Read Command with Autoprecharge
20
20
20
ns
1-4
t
RP
Precharge command period
20
20
20
ns
1-4
t
RRD
Active bank A to Active bank B command
15
15
15
ns
1-4
t
WR
Write recovery time
15
15
15
ns
1-4
t
DAL
Auto precharge write recovery
+ precharge time
(t
WR
/t
CK)
+
(t
RP
/t
CK)
(t
WR
/t
CK)
+
(t
RP
/t
CK)
(t
WR
/t
CK)
+
(t
RP
/t
CK)
t
CK
1-4,13
t
WTR
Internal write to read command delay
1
1
1
t
CK
1-4
t
XSNR
Exit self-refresh to non-read command
75
75
80
ns
1-4
t
XSRD
Exit self-refresh to read command
200
200
200
t
CK
1-4
t
REFI
Average Periodic Refresh Interval
7.8
7.8
7.8
μ
s
1-4, 8
Electrical Characteristics & AC Timing for DDR266/DDR200 - Absolute Specifications
(0
°
C
T
A
70
°
C
;
V
DDQ
= 2.5V
±
0.2V; V
DD
= 2.5V
±
0.2V, See AC Characteristics) (Part 2 of 2)
Symbol
Parameter
DDR266A
(-7K)
DDR266B
(-75B)
DDR200
(-8B)
Unit
Notes
Min
Max
Min
Max
Min
Max
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