參數(shù)資料
型號(hào)： W9425G8DH-6
廠(chǎng)商： WINBOND ELECTRONICS CORP
元件分類(lèi)： DRAM
英文描述： 32M X 8 DDR DRAM, 0.7 ns, PDSO66
封裝： 0.400 INCH, 0.65 MM PITCH, ROHS COMPLIANT, TSOP2-66
文件頁(yè)數(shù)： 28/53頁(yè)
文件大?。?/td> 1920K
代理商： W9425G8DH-6
W9425G8DH
Publication Release Date: Nov. 20, 2007
- 34 -
Revision A4
f. Verified under typical conditions for qualification purposes.
g. TSOP II package devices only.
h. Only intended for operation up to 266 Mbps per pin.
i. A derating factor will be used to increase tIS and tIH in the case where the input slew rate is below
0.5 V/nS as shown in Table 2. The Input slew rate is based on the lesser of the slew rates
determined by either VIH(AC) to VIL(AC) or VIH(DC) to VIL(DC), similarly for rising transitions.
j. A derating factor will be used to increase tDS and tDH in the case where DQ, DM, and DQS slew
rates differ, as shown in Tables 3 & 4. Input slew rate is based on the larger of AC-AC delta rise,
fall rate and DC-DC delta rise, fall rate. Input slew rate is based on the lesser of the slew rates
determined by either VIH(AC) to VIL(AC) or VIH(DC) to VIL(DC), similarly for rising transitions.
The delta rise/fall rate is calculated as:
{1/(Slew Rate1)}-{1/(slew Rate2)}
For example: If Slew Rate 1 is 0.5 V/nS and Slew Rate 2 is 0.4 V/nS, then the delta rise, fall rate is
-0.5 nS/V. Using the table given, this would result in the need for an increase in tDS and tDH of 100
pS.
k. Table 3 is used to increase tDS and tDH in the case where the I/O slew rate is below 0.5 V/nS. The
I/O slew rate is based on the lesser of the AC-AC slew rate and the DC-DC slew rate. The input
slew rate is based on the lesser of the slew rates determined by either VIH(AC) to VIL(AC) or VIH(DC)
to VIL(DC), and similarly for rising transitions.
m. DQS, DM, and DQ input slew rate is specified to prevent double clocking of data and preserve
setup and hold times. Signal transitions through the DC region must be monotonic.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
W9425G8EH 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:8M × 4 BANKS × 8 BITS DDR SDRAM
W946432AD 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:512K X 4 BANKS X 32 BITS DDR SDRAM
W9464G6IB 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:1M × 4 BANKS × 16 BITS DDR SDRAM
W9464G6IH 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:1M ?? 4 BANKS ?? 16 BITS DDR SDRAM
W9464G6JH 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:1M ? 4 BANKS ? 16 BITS DDR SDRAM
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