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參數資料
| 型號： | IBM11N8645B |
| 廠商： | IBM Microeletronics |
| 英文描述： | 8M x 64 DRAM MODULE(8M x 64動態(tài)RAM模塊) |
| 中文描述： | 8米× 64 DRAM模塊（8米× 64動態(tài)內存模塊） |
| 文件頁數： | 12/31頁 |
| 文件大小： | 626K |
| 代理商： | IBM11N8645B |
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IBM11N8645B
IBM11N8645C
8M x 64/72 DRAM MODULE
IBM11N8735B
IBM11N8735C
IBM Corporation. All rights reserved.
Use is further subject to the provisions at the end of this document.
Page 12 of 33
75H1747
SA14-4624-04
Revised 3/97
Read-Modify-Write Cycle
Symbol
Parameter
-60
-70
Unit
Notes
Min
Max
Min
Max
t
RWC
Read-Modify-Write Cycle Time
135
—
162
—
ns
t
RWD
RAS to WE Delay Time
79
—
94
—
ns
1
t
CWD
CAS to WE Delay Time
34
—
44
—
ns
1
t
AWD
Column Address to WE Delay Time
49
—
59
—
ns
1
t
OEH
OE Command Hold Time
10
—
12
—
ns
1. t
WCS
, t
RWD
, t
CWD
, and t
AWD
are not restrictive parameters. They are included in the data sheet as electrical characteristics only. If
t
WCS
≥
t
WCS
(min.), the entire cycle is an early write cycle and the data pin will remain open circuit (high impedance) through the
entire cycle; If t
RWD
≥
t
RWD
(min.), t
CWD
≥
t
CWD
(min.) and t
AWD
≥
t
AWD
(min.), the cycle is a Read-Modify-Write cycle and the data will
contain read from the selected cell: If neither of the above sets of conditions are met, the condition of the data (at access time) is
indeterminate.
EDO Mode Cycle
Symbol
Parameter
-60
-70
Units
Notes
Min.
Max.
Min.
Max.
t
HCAS
CAS Pulse Width (EDO Page Mode)
10
10K
12
10K
ns
t
HPC
EDO Page Mode Cycle Time (Read/Write)
25
—
30
—
ns
t
HPRWC
EDO Page Mode Read Modify Write Cycle Time
60
—
72
—
ns
t
DOH
Data-out Hold Time from CAS
5
—
5
—
ns
t
WHZ
Output buffer Turn-Off Delay from WE
0
10
0
15
ns
t
WPZ
WE Pulse Width to Output Disable at CAS High
10
—
10
—
ns
t
CPRH
RAS Hold Time from CAS Precharge
35
—
40
—
ns
t
CPA
Access Time from CAS Precharge
—
35
—
40
ns
1
t
RASP
EDO Page Mode RAS Pulse Width
60
125K
70
125K
ns
t
OEP
OE High Pulse Width
10
—
10
—
ns
t
OEHC
OE High Hold Time from CAS High
10
—
10
—
ns
1. Measured with the specified current load and 100pF at V
OL
= 0.8V and V
OH
= 2.0V.
Discontinued (9/98 - last order; 3/99 last ship)
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