參數(shù)資料
型號(hào)： HM5425161B
廠商： Hitachi,Ltd.
英文描述： 256M SSTL_2 interface DDR SDRAM(256M SSTL_2接口 DDR 同步DRAM)
中文描述： 256M DDR SDRAM的接口SSTL_2（256M SSTL_2接口的DDR同步DRAM）的
文件頁(yè)數(shù)： 10/62頁(yè)
文件大小： 1016K
代理商： HM5425161B
HM5425161B, HM5425801B, HM5425401B Series
10
Pin Functions (1)
CLK,
CLK
(input pin):
The CLK and the
CLK
are the master clock inputs. All inputs except DMs, DQSs
and DQs are referred to the cross point of the CLK rising edge and the V
REF
level. When a read operation,
DQSs and DQs are referred to the cross point of the CLK and the
CLK
. When a write operation, DMs and
DQs are referred to the cross point of the DQS and the V
REF
level. DQSs for write operation are referred to
the cross point of the CLK and the
CLK
.
CS
(input pin):
When
CS
is Low, commands and data can be input. When
CS
is High, all inputs are
ignored. However, internal operations (bank active, burst operations, etc.) are held.
RAS
,
CAS
, and
WE
(input pins):
These pins define operating commands (read, write, etc.) depending on
the combinations of their voltage levels. See "Command operation".
A0 to A12 (input pins):
Row address (AX0 to AX12) is determined by the A0 to the A12 level at the cross
point of the CLK rising edge and the V
REF
level in a bank active command cycle. Column address (AY0 to
AY8; the HM5425161B, AY0 to AY9; the HM5425801B, AY0 to AY9, AY11; the HM5425401B) is loaded
via the A0 to the A9 at the cross point of the CLK rising edge and the V
REF
level in a read or a write command
cycle. This column address becomes the starting address of a burst operation.
A10 (AP) (input pin):
A10 defines the precharge mode when a precharge command, a read command or a
write command is issued. If A10 = High when a precharge command is issued, all banks are precharged. If
A10 = Low when a precharge command is issued, only the bank that is selected by A13 (BA1)/A14 (BA0) is
precharged. If A10 = High when read or write command, auto-precharge function is enabled. While A10 =
Low, auto-precharge function is disabled.
A13 (BA1)/A14 (BA0) (input pin):
A13 (BA1)/A14 (BA0) are bank select signals. The memory array is
divided into bank 0, bank 1, bank 2 and bank 3. If A13 = Low and A14 = Low, bank 0 is selected. If A13 =
High and A14 = Low, bank 1 is selected. If A13 = Low and A14 = High, bank 2 is selected. If A13 = High
and A14 = High, bank 3 is selected.
CKE (input pin):
CKE controls power down and self-refresh. The power down and the self-refresh
commands are entered when the CKE is driven Low and exited when it resumes to High.
The CKE level must be kept for 1 CLK cycle (= t
CKEPW
) at least, that is, if CKE changes at the cross point of
the CLK rising edge and the V
REF
level with proper setup time t
IS
, by the next CLK rising edge CKE level
must be kept with proper hold time t
IH
.
相關(guān)PDF資料
PDF描述
HM5425401B 256M SSTL_2 interface DDR SDRAM(256M SSTL_2接口 DDR 同步DRAM)
HM5425801B 256M SSTL_2 interface DDR SDRAM(256M SSTL_2接口 DDR 同步DRAM)
HM6116LP-2 2048-word X 8bit High Speed CMOS Static RAM
HM6116LP-3 2048-word X 8bit High Speed CMOS Static RAM
HM6116LP-4 2048-word X 8bit High Speed CMOS Static RAM
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HM5425161B/801B/401B 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Series 256M SSTL-2 Interface DDR SDRAM 143 MHz/133 MHz/125
HM5425161BTT-10 制造商:ELPIDA 制造商全稱(chēng):Elpida Memory 功能描述:256M SSTL_2 interface DDR SDRAM 143 MHz/133 MHz/125 MHz/100 MHz 4-Mword 】 16-bit 】 4-bank/8-Mword 】 8-bit 】 4-bank/ 16-Mword 】 4-bit 】 4-bank
HM5425161BTT-75A 制造商:ELPIDA 制造商全稱(chēng):Elpida Memory 功能描述:256M SSTL_2 interface DDR SDRAM 143 MHz/133 MHz/125 MHz/100 MHz 4-Mword 】 16-bit 】 4-bank/8-Mword 】 8-bit 】 4-bank/ 16-Mword 】 4-bit 】 4-bank
HM5425161BTT-75B 制造商:ELPIDA 制造商全稱(chēng):Elpida Memory 功能描述:256M SSTL_2 interface DDR SDRAM 143 MHz/133 MHz/125 MHz/100 MHz 4-Mword 】 16-bit 】 4-bank/8-Mword 】 8-bit 】 4-bank/ 16-Mword 】 4-bit 】 4-bank
HM5425401B 制造商:ELPIDA 制造商全稱(chēng):Elpida Memory 功能描述:256M SSTL_2 interface DDR SDRAM 143 MHz/133 MHz/125 MHz/100 MHz 4-Mword 】 16-bit 】 4-bank/8-Mword 】 8-bit 】 4-bank/ 16-Mword 】 4-bit 】 4-bank
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*