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参数资料
| 型号： | MT46V32M8P-75ELIT:G |
| 元件分类： | DRAM |
| 英文描述： | 64M X 8 DDR DRAM, 0.75 ns, PDSO66 |
| 封装： | 0.40 INCH, LEAD FREE,PLASTIC, TSOP-66 |
| 文件页数： | 92/93页 |
| 文件大小： | 3632K |
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PDF: 09005aef80768abb/Source: 09005aef82a95a3a
Micron Technology, Inc., reserves the right to change products or specifications without notice.
DDR_x4x8x16_Core2.fm - 256Mb DDR: Rev. O, Core DDR: Rev. B 1/09 EN
90
2003 Micron Technology, Inc. All rights reserved.
256Mb: x4, x8, x16 DDR SDRAM
Operations
Power-down (CKE Not Active)
Unlike SDR SDRAMs, DDR SDRAMs require CKE to be active at all times an access is in
progress, from the issuing of a READ or WRITE command, until completion of the
access. Thus a clock suspend is not supported. For READs, an access completion is
defined when the read postamble is satisfied; for WRITEs, when the write recovery time
(tWR) is satisfied.
Power-down, as shown in Figure 55 on page 91, is entered when CKE is registered LOW
and all criteria in Table 33 on page 47 are met. If power-down occurs when all banks are
idle, this mode is referred to as precharge power-down; if power-down occurs when a
row is active in any bank, this mode is referred to as active power-down. Entering power-
down deactivates the input and output buffers, excluding CK, CK#, and CKE. For
maximum power savings, the DLL is frozen during precharge power-down mode. Exiting
power-down requires the device to be at the same voltage and frequency as when it
entered power-down. However, power-down duration is limited by the refresh require-
ments of the device (tREFC or tREFCAT).
While in power-down, CKE LOW and a stable clock signal must be maintained at the
inputs of the DDR SDRAM, while all other input signals are “Don’t Care.” The power-
down state is synchronously exited when CKE is registered HIGH (in conjunction with a
NOP or DESELECT command). A valid executable command may be applied one clock
cycle later.
相关PDF资料 |
PDF描述 |
|---|---|
| MT47H128M4CC-3:B | 128M X 4 DDR DRAM, 0.45 ns, PBGA84 |
| MT47H32M16HR-37EAT:G | 32M X 16 DDR DRAM, 0.5 ns, PBGA84 |
| MT47H64M16BT-3ELIT:A | 64M X 16 DDR DRAM, 0.45 ns, PBGA92 |
| MT47H64M8B6-3ELAT:D | DDR DRAM, PBGA60 |
| MT48H32M16LFCJ-8 | 32M X 16 SYNCHRONOUS DRAM, 7 ns, PBGA54 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MT46V32M8T66ADC1 | 制造商:Micron Technology Inc 功能描述:32MX8 DDR SDRAM DIE-COM COMMERCIAL 2.5V - Trays |
| MT46V32M8TG-5B/G | 制造商:Micron Technology Inc 功能描述:DRAM Chip DDR SDRAM 256M-Bit 32Mx8 2.6V 66-Pin TSOP Tray |
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