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參數資料
| 型號： | MSM514800D-XXJS |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | 524,288-Word x 8-Bit DYNAMIC RAM : FAST PAGE MODE TYPE |
| 中文描述： | 524,288字× 8位動態(tài)隨機存儲器：快速頁面模式型 |
| 文件頁數： | 8/14頁 |
| 文件大小： | 178K |
| 代理商： | MSM514800D-XXJS |
Semiconductor
1
This Version: Dec.2000
MSM514800D/DSL
8/14
FEDD514800DSL-01
Notes:
1.
A start-up delay of 200
μ
s is required after power-up, followed by a minimum of eight initialization
cycles (
RAS
-only refresh or
CAS
before
RAS
refresh) before proper device operation is achieved.
2.
The AC characteristics assume t
T
= 5ns.
3.
V
IH
(Min.) and V
IL
(Max.) are reference levels for measuring input timing signals. Transition times
(t
T
) are measured between V
IH
and V
IL
.
4.
This parameter is measured with a load circuit equivalent to 2 TTL load and 100pF.
5.
Operation within the t
RCD
(Max.) limit ensures that t
RAC
(Max.) can be met.
t
RCD
(Max.) is specified as a reference point only. If t
RCD
is greater than the specified t
RCD
(Max.)
limit, then the access time is controlled by t
CAC
.
6.
Operation within the t
RAD
(Max.) limit ensures that t
RAC
(Max.) can be met.
t
RAD
(Max.) is specified as a reference point only. If t
RAD
is greater than the specified t
RAD
(Max.)
limit, then the access time is controlled by t
AA
.
7.
t
OFF
(Max.) and t
OEZ
(Max.) define the time at which the output achieved the open circuit
condition and are not referenced to output voltage levels.
8.
t
RCH
or t
RRH
must be satisfied for a read cycle.
9.
t
WCS
, t
CWD
, t
RWD
, t
AWD
and t
CPWD
are not restrictive operating parameters. They are included in
the data sheet as electrical characteristics only. If t
WCS
≥
t
WCS
(Min.), then the cycle is an early
write cycle and the data out will remain open circuit (high impedance) throughout the entire cycle.
If t
CWD
≥
t
CWD
(Min.), t
RWD
≥
t
RWD
(Min.), t
AWD
≥
t
AWD
(Min.) and t
CPWD
≥
t
CPWD
(Min.), then
the cycle is a read modify write cycle and data out will contain data read from the selected cell; if
neither of the above sets of conditions is satisfied, then the condition of the data out (at access time)
is indeterminate.
10. These parameters are referenced to the
CAS
, leading edges in an early write cycle, and to the
WE
leading edge in an
OE
control write cycle, or a read modify write cycle.
11. SL version only.
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相關代理商/技術參數 |
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| MSM514800ESL-60JS | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:524,288-Word x 8-Bit DYNAMIC RAM : FAST PAGE MODE TYPE |
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