- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377884 > MB8117405B-60 (Fujitsu Limited) 4 M ×4 BITS Fast Page Mode Dynamic RAM(CMOS 4 M ×4 位快速頁面存取模式RAM) PDF資料下載
參數(shù)資料
| 型號： | MB8117405B-60 |
| 廠商： | Fujitsu Limited |
| 英文描述： | 4 M ×4 BITS Fast Page Mode Dynamic RAM(CMOS 4 M ×4 位快速頁面存取模式RAM) |
| 中文描述： | 4米× 4位快速頁面模式動態(tài)RAM（的CMOS 4米× 4位快速頁面存取模式的RAM） |
| 文件頁數(shù)： | 25/31頁 |
| 文件大?。?/td> | 588K |
| 代理商： | MB8117405B-60 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁當(dāng)前第25頁第26頁第27頁第28頁第29頁第30頁第31頁
25
MB8117405B-50/-60
“H” or “L” level (excluding Address and DQ)
“H” or “L” level, “H”
→
“L” or “L”
→
“H” transition (Address and DQ)
“H” or “L” level (excluding Address and DQ)
“H” or “L” level, “H”
→
“L” or “L”
→
“H” transition (Address and DQ)
CAS
V
IH
V
IL
HIGH-Z
HIGH-Z
ROW ADDRESS
CAS
Fig. 16 – RAS-ONLY REFRESH (WE = OE = “H” or “L”)
Fig. 17 – CAS-BEFORE-RAS REFRESH (ADRESSES = OE = “H” or “L”)
V
IH
V
IL
RAS
V
IH
V
IL
V
IH
V
IL
V
OH
V
OL
A
0
to A
10
V
IH
V
IL
V
OH
V
OL
RAS
DQ
(Output)
DESCRIPTION
Refresh of RAM memory cells is accomplished by performing a read, a write, or a read-modify-write cycle at each of 2048 row
addresses every 32.8-milliseconds. Three refresh modes are available: RAS-only refresh, CAS-before-RAS refresh, and hidden
refresh.
RAS-only refresh is performed by keeping RAS Low and CAS High throughout the cycle; the row address to be refreshed is
latched on the falling edge of RAS. During RAS-only refresh, D
OUT
pin is kept in a high-impedance state.
DESCRIPTION
CAS-before-RAS refresh is an on-chip refresh capability that eliminates the need for external refresh addresses. If CAS is held Low
for the specified setup time (t
CSR
) before RAS goes Low, the on-chip refresh control clock generators and refresh address counter
are enabled. An internal refresh operation automatically occurs and the refresh address counter is internally incriminated in prep-
aration for the next CAS-before-RAS refresh operation.
DQ
(Output)
t
RAS
t
RC
t
RP
t
RPC
t
CRP
t
RAH
t
ASR
t
CRP
t
OFF
t
OH
t
RC
t
RP
t
RAS
t
CPN
t
CSR
t
CHR
t
RPC
t
OFF
t
OH
WE
V
IH
V
IL
t
WHR
t
WSR
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MB8117800A-70 | CMOS 2 M ×8BIT Fast Page Mode DRAM(CMOS 2 M ×8 位快速頁面存取模式動態(tài)RAM) |
| MB8117800A-60 | CMOS 2 M ×8BIT Fast Page Mode DRAM(CMOS 2 M ×8 位快速頁面存取模式動態(tài)RAM) |
| MB8117805A-60 | CMOS 2M ×8 BIT Hyper Page Mode Dynamic RAM(CMOS 2M ×8 位超級頁面存取模式動態(tài)RAM) |
| MB8117805A-70 | CMOS 2M ×8 BIT Hyper Page Mode Dynamic RAM(CMOS 2M ×8 位超級頁面存取模式動態(tài)RAM) |
| MB8117805B-50 | CMOS 2M ×8 BIT Hyper Page Mode Dynamic RAM(CMOS 2M ×8 位超級頁面存取模式動態(tài)RAM) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MB8117800A-60 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2 M X 8 BIT FAST PAGE MODE DYNAMIC RAM |
| MB8117800A-70 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2 M X 8 BIT FAST PAGE MODE DYNAMIC RAM |
| MB812 | 功能描述:ACCY MOUNT BMM 3/4 58A RoHS:是 類別:RF/IF 和 RFID >> RF配件 系列:* 標(biāo)準(zhǔn)包裝:1 系列:* |
| MB812.833 | 功能描述:ACCY MOUNT BMM 3/4 58A RoHS:是 類別:RF/IF 和 RFID >> RF配件 系列:* 標(biāo)準(zhǔn)包裝:1 系列:* |
| MB-8120 | 制造商:Maxxtro 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。