- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄296249 > IS43R32800B-5BL (INTEGRATED SILICON SOLUTION INC) 8M X 32 DDR DRAM, 0.7 ns, PBGA144 PDF資料下載
參數(shù)資料
| 型號(hào)： | IS43R32800B-5BL |
| 廠商： | INTEGRATED SILICON SOLUTION INC |
| 元件分類： | DRAM |
| 英文描述： | 8M X 32 DDR DRAM, 0.7 ns, PBGA144 |
| 封裝： | 12 X 12 MM, 0.80 MM PITCH, LEAD FREE, MINI, FBGA-144 |
| 文件頁數(shù)： | 10/39頁 |
| 文件大?。?/td> | 507K |
| 代理商： | IS43R32800B-5BL |
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頁當(dāng)前第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
18
Integrated Silicon Solution, Inc. — www.issi.com
Rev. 00D
03/19/08
IS43R32800B
FUNCTIONAL DESCRIPTION
The IS43R32800B is a 256Mb DDR SDRAM internally configured as a quad--bank DRAM. These 256Mb device contains
4 banks x 2,097,152 x32 bits. The DDR SDRAM uses a double--data--rate architecture to achieve high-speed operation.
The double data rate architecture is essentially a 2n prefetch architecture, with an interface designed to transfer two data
words per clock cycle at the I/O pins. A single read or write access for the DDR SDRAM consists of a single 2n-bit wide,
one clock cycle data transfer at the internal DRAM core and two corresponding n-bit wide, one-half clock cycle data
transfers at the I/O pins.
Read and write accesses to the DDR SDRAM are burst oriented; accesses start at a selected location and continue for a
programmed number of locations in a programmed sequence. Accesses begin with the registration of an ACTIVE
command, which is then followed by a READ or WRITE command. The address bits registered coincident with the
ACTIVE command are used to select the bank and row to be accessed (BA0, BA1 select the bank; A0-A11 select the
row). The address bits registered coincident with the READ or WRITE command are used to select the starting column
location for the burst access. Prior to normal operation, the DDR SDRAM must be initialized. The following sections
provide detailed information covering device initialization, register definition, command descriptions and device operation.
INITIALIZATION
DDR SDRAMs must be powered up and initialized in a predefined manner.
POWER ON SEQUENCE
Before starting normal operation, the following power on sequence is necessary to prevent a DDR SDRAM from damaged
or multi functioning.
1. Apply VDD before or the same time as VDDQ
2. Apply VDDQ before or at the same time as VTT & Vref
3. Maintain stable condition for 200us after stable power and CLK, apply NOP or DSEL
4. Issue precharge command for all banks of the device
5. Issue EMRS
6. Issue MRS for the Mode Register and to reset the DLL
7. Issue 2 or more Auto Refresh commands
8. Maintain stable condition for 200cycles
After these sequence, the DDR SDRAM is idle state and ready for normal operation.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| IS61C512-25TI | x8 SRAM |
| IS61C512-35J | x8 SRAM |
| IS61C512-35JI | x8 SRAM |
| IS61C512-35K | x8 SRAM |
| IS61C512-35M | x8 SRAM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IS43R32800B-5BLI | 功能描述:動(dòng)態(tài)隨機(jī)存取存儲(chǔ)器 256Mb (16M x 16) DDR, 2.5v, 200MHz RoHS:否 制造商:ISSI 數(shù)據(jù)總線寬度:16 bit 組織:1 M x 16 封裝 / 箱體:SOJ-42 存儲(chǔ)容量:16 MB 最大時(shí)鐘頻率: 訪問時(shí)間:50 ns 電源電壓-最大:7 V 電源電壓-最小:- 1 V 最大工作電流:90 mA 最大工作溫度:+ 85 C 封裝:Tube |
| IS43R32800B-5BLI-TR | 功能描述:動(dòng)態(tài)隨機(jī)存取存儲(chǔ)器 256Mb (16M x 16) DDR, 2.5v, 200MHz RoHS:否 制造商:ISSI 數(shù)據(jù)總線寬度:16 bit 組織:1 M x 16 封裝 / 箱體:SOJ-42 存儲(chǔ)容量:16 MB 最大時(shí)鐘頻率: 訪問時(shí)間:50 ns 電源電壓-最大:7 V 電源電壓-最小:- 1 V 最大工作電流:90 mA 最大工作溫度:+ 85 C 封裝:Tube |
| IS43R32800B-5BL-TR | 功能描述:動(dòng)態(tài)隨機(jī)存取存儲(chǔ)器 256M (16Mx16) 400MHz DDR 2.5v RoHS:否 制造商:ISSI 數(shù)據(jù)總線寬度:16 bit 組織:1 M x 16 封裝 / 箱體:SOJ-42 存儲(chǔ)容量:16 MB 最大時(shí)鐘頻率: 訪問時(shí)間:50 ns 電源電壓-最大:7 V 電源電壓-最小:- 1 V 最大工作電流:90 mA 最大工作溫度:+ 85 C 封裝:Tube |
| IS43R32800B-5B-TR | 功能描述:動(dòng)態(tài)隨機(jī)存取存儲(chǔ)器 256M (16Mx16) 400MHz Commercial Temp RoHS:否 制造商:ISSI 數(shù)據(jù)總線寬度:16 bit 組織:1 M x 16 封裝 / 箱體:SOJ-42 存儲(chǔ)容量:16 MB 最大時(shí)鐘頻率: 訪問時(shí)間:50 ns 電源電壓-最大:7 V 電源電壓-最小:- 1 V 最大工作電流:90 mA 最大工作溫度:+ 85 C 封裝:Tube |
| IS43R32800B-6B | 功能描述:動(dòng)態(tài)隨機(jī)存取存儲(chǔ)器 256M (16Mx16) 333MHz Commercial Temp RoHS:否 制造商:ISSI 數(shù)據(jù)總線寬度:16 bit 組織:1 M x 16 封裝 / 箱體:SOJ-42 存儲(chǔ)容量:16 MB 最大時(shí)鐘頻率: 訪問時(shí)間:50 ns 電源電壓-最大:7 V 電源電壓-最小:- 1 V 最大工作電流:90 mA 最大工作溫度:+ 85 C 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。