- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384042 > UPD42S18165L (NEC Corp.) 3.3 V OPERATION 16 M-BIT DYNAMIC RAM 1 M-WORD BY 16-BIT, EDO, BYTE READ/WRITE MODE PDF資料下載
參數(shù)資料
| 型號： | UPD42S18165L |
| 廠商： | NEC Corp. |
| 英文描述： | 3.3 V OPERATION 16 M-BIT DYNAMIC RAM 1 M-WORD BY 16-BIT, EDO, BYTE READ/WRITE MODE |
| 中文描述： | 3.3 V工作16 m位動態(tài)隨機(jī)存儲器1個M字由16位，江戶，字節(jié)讀/寫模式 |
| 文件頁數(shù)： | 6/48頁 |
| 文件大小： | 319K |
| 代理商： | UPD42S18165L |
第1頁第2頁第3頁第4頁第5頁當(dāng)前第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頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁
μ
PD42S18165L, 4218165L
6
Hyper Page Mode (EDO)
The hyper page mode (EDO) is a kind of page mode with enhanced features. The two major features of the
hyper page mode (EDO) are as follows.
1. Data output time is extended.
In the hyper page mode (EDO), the output data is held to the next CAS cycle’s falling edge, instead of the rising
edge. For this reason, valid data output time in the hyper page mode (EDO) is extended compared with the fast
page mode (= data extend function). In the fast page mode, the data output time becomes shorter as the CAS
cycle time becomes shorter. Therefore, in the hyper page mode (EDO), the timing margin in read cycle is larger
than that of the fast page mode even if the CAS cycle time becomes shorter.
2. The CAS cycle time in the hyper page mode (EDO) is shorter than that in the fast page mode.
In the hyper page mode (EDO), due to the data extend function, the CAS cycle time can be shorter than in the
fast page mode if the timing margin is the same.
Taking a device whose t
RAC
is 60 ns as an example, the CAS cycle time in the fast page mode is 25 ns while that
in the fast page mode is 40 ns.
In the hyper page mode (EDO), read (data out) and write (data in) cycles can be executed repeatedly during one
RAS cycle. The hyper page mode (EDO) allows both read and write operations during one cycle.
The following shows a part of the hyper page mode (EDO) read cycle. Specifications to be observed are described
in the next page.
Hyper Page Mode (EDO) Read Cycle
t
HPC
t
OEA
t
OEZ
t
AA
t
CAC
Hi - Z
Hi - Z
Row
Col.A
Col.B
Col.C
t
OEA
t
OLZ
RAS
V
IH
–
V
IL
–
CAS
V
IH
–
V
IL
–
AddressV
IH
–
V
IL
–
V
IH
–
V
IL
–
OE
V
IH
–
V
IL
–
I/O
V
OH
–
V
OL
–
Data out A
Data out B
Data out C
Data out C
t
OEZ
t
AA
t
CAC
t
OEZ
t
OEP
t
OEP
t
OCH
t
CHO
t
CHO
WE
t
RAC
t
AA
t
CAC
t
CLZ
t
CLZ
t
WPZ
t
DHC
t
OFC
t
OFR
t
WEZ
t
OCH
t
RRH
t
RCH
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UPD42270 | NTSC FIELD BUFFER |
| UPD42274 | DUAL - PORT GRAPHICS BUFFER |
| UPD43256A | 32,768 X 8-BIT STATIC CMOS RAM |
| UPD43256AC-10LL | 32,768 X 8-BIT STATIC CMOS RAM |
| UPD43256AGX-10LL | 32,768 X 8-BIT STATIC CMOS RAM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPD42S18165LG5-A60-7JF | 制造商:NEC Electronics Corporation 功能描述:Dynamic RAM, EDO, 1M x 16, 50 Pin, Plastic, TSOP |
| UPD42S4260-60 | 制造商:NEC Electronics Corporation 功能描述: |
| UPD42S4260G5607JF | 制造商:NEC 功能描述:* |
| UPD42S4400LGS-A70-9JD | 制造商:NEC Electronics Corporation 功能描述:IC,DRAM,FAST PAGE,1MX4,CMOS,TSSOP,26PIN,PLASTIC |
| UPD42S4800G5707JD | 制造商:NEC 功能描述:* |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。