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參數(shù)資料
| 型號： | GS8182S18BD-250I |
| 廠商： | GSI TECHNOLOGY |
| 元件分類： | SRAM |
| 英文描述： | 1M X 18 DDR SRAM, 0.45 ns, PBGA165 |
| 封裝： | 13 X 15 MM, 1 MM PITCH, FPBGA-165 |
| 文件頁數(shù)： | 36/37頁 |
| 文件大?。?/td> | 564K |
| 代理商： | GS8182S18BD-250I |
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GS8182S08/09/18/36BD-400/375/333/300/250/200/167
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
Rev: 1.03b 6/2010
8/37
2007, GSI Technology
Power-Up Sequence for SigmaQuad-II SRAMs
SigmaQuad-II SRAMs must be powered-up in a specific sequence in order to avoid undefined operations.
Power-Up Sequence
1. Power-up and maintain Doff at low state.
1a. Apply VDD.
1b. Apply VDDQ.
1c. Apply VREF (may also be applied at the same time as VDDQ).
2. After power is achieved and clocks (K, K, C, C) are stablized, change Doff to high.
3. An additional 1024 clock cycles are required to lock the DLL after it has been enabled.
Note:
If you want to tie Doff high with an unstable clock, you must stop the clock for a minimum of 30 ns to reset the DLL after
the clocks become stablized.
DLL Constraints
The DLL synchronizes to either K or C clock. These clocks should have low phase jitter (tKCVar on page 21).
The DLL cannot operate at a frequency lower than that specified by the tKHKH maximum specification for the desired operating clock frequency.
If the incoming clock is not stablized when DLL is enabled, the DLL may lock on the wrong frequency and cause undefined errors or failures during
the initial stage.
Note:
If the frequency is changed, DLL reset is required. After reset, a minimum of 1024 cycles is required for DLL lock.
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相關代理商/技術參數(shù) |
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|---|---|
| GS8182S18D-250 | 制造商:GSI Technology 功能描述:SRAM SYNC DUAL 1.8V 18MBIT 1MX18 0.45NS 165FBGA - Trays |
| GS8182S18D-250I | 制造商:GSI Technology 功能描述:SRAM SYNC DUAL 1.8V 18MBIT 1MX18 0.45NS 165FPBGA - Trays |
| GS8182S36BD-167 | 制造商:GSI Technology 功能描述:512K X 36 (18 MEG) BURST OF 2 - Trays |
| GS8182S36BD-167I | 制造商:GSI Technology 功能描述:512K X 36 (18 MEG) BURST OF 2 - Trays |
| GS8182S36BD-200 | 制造商:GSI Technology 功能描述:512K X 36 (18 MEG) BURST OF 2 - Trays |
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