Micron美光双通道同步动态随机存储器DDR SDRAM
Part |
Density |
RoHS |
Depth |
Width |
Voltage |
Package |
Pin Count |
Clock Rate |
Cycle Time |
Op. Temp. |
CL |
Data Rate |
Part |
MT46V128M4BN-5B |
512Mb |
Yes |
128Mb |
x4 |
2.6V |
FBGA |
60-ball |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V128M4BN-5B |
MT46V128M4BN-6 |
512Mb |
Yes |
128Mb |
x4 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V128M4BN-6 |
MT46V128M4BN-6 IT |
512Mb |
Yes |
128Mb |
x4 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V128M4BN-6 IT |
MT46V128M4BN-75 |
512Mb |
Yes |
128Mb |
x4 |
2.5V |
FBGA |
60-ball |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V128M4BN-75 |
MT46V128M4FN-5B |
512Mb |
39208 |
128Mb |
x4 |
2.6V |
FBGA |
60-ball |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V128M4FN-5B |
MT46V128M4FN-6 |
512Mb |
39208 |
128Mb |
x4 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V128M4FN-6 |
MT46V128M4P-5B |
512Mb |
Yes |
128Mb |
x4 |
2.6V |
TSOP |
66-pin |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V128M4P-5B |
MT46V128M4P-6T |
512Mb |
Yes |
128Mb |
x4 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V128M4P-6T |
MT46V128M4P-75 |
512Mb |
Yes |
128Mb |
x4 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V128M4P-75 |
MT46V128M4TG-5B |
512Mb |
39208 |
128Mb |
x4 |
2.6V |
TSOP |
66-pin |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V128M4TG-5B |
MT46V128M4TG-6T |
512Mb |
39208 |
128Mb |
x4 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V128M4TG-6T |
MT46V128M8P-6T |
1Gb |
Yes |
128Mb |
x8 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V128M8P-6T |
MT46V128M8P-6T IT |
1Gb |
Yes |
128Mb |
x8 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V128M8P-6T IT |
MT46V128M8P-75 |
1Gb |
Yes |
128Mb |
x8 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V128M8P-75 |
MT46V128M8P-75 IT |
1Gb |
Yes |
128Mb |
x8 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
-40C to +85C |
CL = 2.5 |
DDR266B |
MT46V128M8P-75 IT |
MT46V128M8TG-5B |
1Gb |
39208 |
128Mb |
x8 |
2.6V |
TSOP |
66-pin |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V128M8TG-5B |
MT46V128M8TG-6T |
1Gb |
39208 |
128Mb |
x8 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V128M8TG-6T |
MT46V128M8TG-75 |
1Gb |
39208 |
128Mb |
x8 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V128M8TG-75 |
MT46V16M16BG-5B |
256Mb |
Yes |
16Mb |
x16 |
2.6V |
FBGA |
60-ball |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V16M16BG-5B |
MT46V16M16BG-5B IT |
256Mb |
Yes |
16Mb |
x16 |
2.6V |
FBGA |
60-ball |
200 MHz |
5ns |
-40C to +85C |
CL = 3 |
DDR400B |
MT46V16M16BG-5B IT |
MT46V16M16BG-6 |
256Mb |
Yes |
16Mb |
x16 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V16M16BG-6 |
MT46V16M16BG-6 IT |
256Mb |
Yes |
16Mb |
x16 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V16M16BG-6 IT |
MT46V16M16BG-75 |
256Mb |
Yes |
16Mb |
x16 |
2.5V |
FBGA |
60-ball |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V16M16BG-75 |
MT46V16M16BG-75E |
256Mb |
Yes |
16Mb |
x16 |
2.5V |
FBGA |
60-ball |
133 MHz |
7.5ns |
0C to +70C |
CL = 2 |
DDR266 |
MT46V16M16BG-75E |
MT46V16M16FG-5B |
256Mb |
39208 |
16Mb |
x16 |
2.6V |
FBGA |
60-ball |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V16M16FG-5B |
MT46V16M16FG-6 |
256Mb |
39208 |
16Mb |
x16 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V16M16FG-6 |
MT46V16M16FG-6 IT |
256Mb |
39208 |
16Mb |
x16 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V16M16FG-6 IT |
MT46V16M16FG-6 L |
256Mb |
39208 |
16Mb |
x16 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V16M16FG-6 L |
MT46V16M16FG-75 |
256Mb |
39208 |
16Mb |
x16 |
2.5V |
FBGA |
60-ball |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V16M16FG-75 |
MT46V16M16FG-75 IT |
256Mb |
39208 |
16Mb |
x16 |
2.5V |
FBGA |
60-ball |
133 MHz |
7.5ns |
-40C to +85C |
CL = 2.5 |
DDR266B |
MT46V16M16FG-75 IT |
MT46V16M16FG-75 L |
256Mb |
39208 |
16Mb |
x16 |
2.5V |
FBGA |
60-ball |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V16M16FG-75 L |
MT46V16M16FG-75E |
256Mb |
39208 |
16Mb |
x16 |
2.5V |
FBGA |
60-ball |
133 MHz |
7.5ns |
0C to +70C |
CL = 2 |
DDR266 |
MT46V16M16FG-75E |
MT46V16M16P-5B |
256Mb |
Yes |
16Mb |
x16 |
2.6V |
TSOP |
66-pin |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V16M16P-5B |
MT46V16M16P-5B IT |
256Mb |
Yes |
16Mb |
x16 |
2.5V |
TSOP |
66-pin |
200 MHz |
5ns |
-40C to +85C |
CL = 3 |
DDR400B |
MT46V16M16P-5B IT |
MT46V16M16P-6 IT |
256Mb |
Yes |
16Mb |
x16 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V16M16P-6 IT |
MT46V16M16P-6T |
256Mb |
Yes |
16Mb |
x16 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V16M16P-6T |
MT46V16M16P-6T IT |
256Mb |
Yes |
16Mb |
x16 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V16M16P-6T IT |
MT46V16M16P-6T L |
256Mb |
Yes |
16Mb |
x16 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V16M16P-6T L |
MT46V16M16P-75 |
256Mb |
Yes |
16Mb |
x16 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V16M16P-75 |
MT46V16M16P-75 IT |
256Mb |
Yes |
16Mb |
x16 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
-40C to +85C |
CL = 2.5 |
DDR266B |
MT46V16M16P-75 IT |
MT46V16M16P-75 L |
256Mb |
Yes |
16Mb |
x16 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V16M16P-75 L |
MT46V16M16P-75Z |
256Mb |
Yes |
16Mb |
x16 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2 |
DDR266A |
MT46V16M16P-75Z |
MT46V16M16TG-5B |
256Mb |
39208 |
16Mb |
x16 |
2.6V |
TSOP |
66-pin |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V16M16TG-5B |
MT46V16M16TG-5B IT |
256Mb |
39208 |
16Mb |
x16 |
2.5V |
DIMM |
66-pin |
200 MHz |
5ns |
-40C to +85C |
CL = 3 |
DDR400B |
MT46V16M16TG-5B IT |
MT46V16M16TG-6T |
256Mb |
39208 |
16Mb |
x16 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V16M16TG-6T |
MT46V16M16TG-6T IT |
256Mb |
39208 |
16Mb |
x16 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V16M16TG-6T IT |
MT46V16M16TG-6T L |
256Mb |
39208 |
16Mb |
x16 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V16M16TG-6T L |
MT46V16M16TG-75 |
256Mb |
39208 |
16Mb |
x16 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V16M16TG-75 |
MT46V16M16TG-75 IT |
256Mb |
39208 |
16Mb |
x16 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
-40C to +85C |
CL = 2.5 |
DDR266B |
MT46V16M16TG-75 IT |
MT46V16M16TG-75 L |
256Mb |
39208 |
16Mb |
x16 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V16M16TG-75 L |
MT46V16M8P-5B |
128Mb |
Yes |
16Mb |
x8 |
2.6V |
TSOP |
66-pin |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V16M8P-5B |
MT46V16M8P-6T |
128Mb |
Yes |
16Mb |
x8 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V16M8P-6T |
MT46V16M8P-75E |
128Mb |
Yes |
16Mb |
x8 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2 |
DDR266 |
MT46V16M8P-75E |
MT46V16M8TG-5B |
128Mb |
39208 |
16Mb |
x8 |
2.6V |
TSOP |
66-pin |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V16M8TG-5B |
MT46V16M8TG-6T |
128Mb |
39208 |
16Mb |
x8 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V16M8TG-6T |
MT46V16M8TG-6T IT |
128Mb |
39208 |
16Mb |
x8 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V16M8TG-6T IT |
MT46V16M8TG-6T L |
128Mb |
39208 |
16Mb |
x8 |
2.5V |
DIMM |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V16M8TG-6T L |
MT46V16M8TG-75 |
128Mb |
39208 |
16Mb |
x8 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V16M8TG-75 |
MT46V16M8TG-75 L |
128Mb |
39208 |
16Mb |
x8 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V16M8TG-75 L |
MT46V256M4P-5B |
1Gb |
Yes |
256Mb |
x4 |
2.6V |
TSOP |
66-pin |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V256M4P-5B |
MT46V256M4P-6T |
1Gb |
Yes |
256Mb |
x4 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V256M4P-6T |
MT46V256M4P-75 |
1Gb |
Yes |
256Mb |
x4 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V256M4P-75 |
MT46V256M4TG-5B |
1Gb |
39208 |
256Mb |
x4 |
2.6V |
TSOP |
66-pin |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V256M4TG-5B |
MT46V256M4TG-6T |
1Gb |
39208 |
256Mb |
x4 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V256M4TG-6T |
MT46V256M4TG-75 |
1Gb |
39208 |
256Mb |
x4 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V256M4TG-75 |
MT46V32M16BN-5B |
512Mb |
Yes |
32Mb |
x16 |
2.6V |
FBGA |
60-ball |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V32M16BN-5B |
MT46V32M16BN-6 |
512Mb |
Yes |
32Mb |
x16 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V32M16BN-6 |
MT46V32M16BN-6 IT |
512Mb |
Yes |
32Mb |
x16 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V32M16BN-6 IT |
MT46V32M16BN-6 L |
512Mb |
Yes |
32Mb |
x16 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V32M16BN-6 L |
MT46V32M16FN-5B |
512Mb |
39208 |
32Mb |
x16 |
2.6V |
FBGA |
60-ball |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V32M16FN-5B |
MT46V32M16FN-6 |
512Mb |
39208 |
32Mb |
x16 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V32M16FN-6 |
MT46V32M16FN-6 IT |
512Mb |
39208 |
32Mb |
x16 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V32M16FN-6 IT |
MT46V32M16FN-6 L |
512Mb |
39208 |
32Mb |
x16 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V32M16FN-6 L |
MT46V32M16P-5B |
512Mb |
Yes |
32Mb |
x16 |
2.6V |
TSOP |
66-pin |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V32M16P-5B |
MT46V32M16P-5B IT |
512Mb |
Yes |
32Mb |
x16 |
2.5V |
TSOP |
66-pin |
200 MHz |
5ns |
-40C to +85C |
CL = 3 |
DDR400B |
MT46V32M16P-5B IT |
MT46V32M16P-6T |
512Mb |
Yes |
32Mb |
x16 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V32M16P-6T |
MT46V32M16P-6T IT |
512Mb |
Yes |
32Mb |
x16 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V32M16P-6T IT |
MT46V32M16P-6T L |
512Mb |
Yes |
32Mb |
x16 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V32M16P-6T L |
MT46V32M16P-75 |
512Mb |
Yes |
32Mb |
x16 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V32M16P-75 |
MT46V32M16P-75Z |
512Mb |
Yes |
32Mb |
x16 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2 |
DDR266A |
MT46V32M16P-75Z |
MT46V32M16TG-5B |
512Mb |
39208 |
32Mb |
x16 |
2.6V |
TSOP |
66-pin |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V32M16TG-5B |
MT46V32M16TG-5B IT |
512Mb |
39208 |
32Mb |
x16 |
2.6V |
TSOP |
66-pin |
200 MHz |
5ns |
-40C to +85C |
CL = 3 |
DDR400B |
MT46V32M16TG-5B IT |
MT46V32M16TG-6T |
512Mb |
39208 |
32Mb |
x16 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V32M16TG-6T |
MT46V32M16TG-6T IT |
512Mb |
39208 |
32Mb |
x16 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V32M16TG-6T IT |
MT46V32M16TG-6T L |
512Mb |
39208 |
32Mb |
x16 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V32M16TG-6T L |
MT46V32M4P-5B |
128Mb |
Yes |
32Mb |
x4 |
2.6V |
TSOP |
66-pin |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V32M4P-5B |
MT46V32M4P-6T |
128Mb |
Yes |
32Mb |
x4 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V32M4P-6T |
MT46V32M4P-75 |
128Mb |
Yes |
32Mb |
x4 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V32M4P-75 |
MT46V32M4P-75Z |
128Mb |
Yes |
32Mb |
x4 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2 |
DDR266A |
MT46V32M4P-75Z |
MT46V32M4TG-5B |
128Mb |
39208 |
32Mb |
x4 |
2.6V |
TSOP |
66-pin |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V32M4TG-5B |
MT46V32M4TG-6 |
128Mb |
39208 |
32Mb |
x4 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V32M4TG-6 |
MT46V32M4TG-6T |
128Mb |
39208 |
32Mb |
x4 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V32M4TG-6T |
MT46V32M4TG-75 |
128Mb |
39208 |
32Mb |
x4 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V32M4TG-75 |
MT46V32M4TG-75Z |
128Mb |
39208 |
32Mb |
x4 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2 |
DDR266A |
MT46V32M4TG-75Z |
MT46V32M8BG-5B |
256Mb |
Yes |
32Mb |
x8 |
2.6V |
FBGA |
60-ball |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V32M8BG-5B |
MT46V32M8BG-6 |
256Mb |
Yes |
32Mb |
x8 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V32M8BG-6 |
MT46V32M8BG-6 IT |
256Mb |
Yes |
32Mb |
x8 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V32M8BG-6 IT |
MT46V32M8BG-6 L |
256Mb |
Yes |
32Mb |
x8 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V32M8BG-6 L |
MT46V32M8BG-75 |
256Mb |
Yes |
32Mb |
x8 |
2.5V |
FBGA |
60-ball |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V32M8BG-75 |
MT46V32M8BG-75 IT |
256Mb |
Yes |
32Mb |
x8 |
2.5V |
FBGA |
60-ball |
133 MHz |
7.5ns |
-40C to +85C |
CL = 2.5 |
DDR266B |
MT46V32M8BG-75 IT |
MT46V32M8BG-75E |
256Mb |
Yes |
32Mb |
x8 |
2.5V |
FBGA |
60-ball |
133 MHz |
7.5ns |
0C to +70C |
CL = 2 |
DDR266 |
MT46V32M8BG-75E |
MT46V32M8FG-5B |
256Mb |
39208 |
32Mb |
x8 |
2.6V |
FBGA |
60-ball |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V32M8FG-5B |
MT46V32M8FG-6 |
256Mb |
39208 |
32Mb |
x8 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V32M8FG-6 |
MT46V32M8FG-6 IT |
256Mb |
39208 |
32Mb |
x8 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V32M8FG-6 IT |
MT46V32M8FG-6 L |
256Mb |
39208 |
32Mb |
x8 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V32M8FG-6 L |
MT46V32M8FG-75 |
256Mb |
39208 |
32Mb |
x8 |
2.5V |
FBGA |
60-ball |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V32M8FG-75 |
MT46V32M8FG-75 L |
256Mb |
39208 |
32Mb |
x8 |
2.5V |
FBGA |
60-ball |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V32M8FG-75 L |
MT46V32M8FG-75E |
256Mb |
39208 |
32Mb |
x8 |
2.5V |
FBGA |
60-ball |
133 MHz |
7.5ns |
0C to +70C |
CL = 2 |
DDR266 |
MT46V32M8FG-75E |
MT46V32M8P-5B |
256Mb |
Yes |
32Mb |
x8 |
2.6V |
TSOP |
66-pin |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V32M8P-5B |
MT46V32M8P-6T |
256Mb |
Yes |
32Mb |
x8 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V32M8P-6T |
MT46V32M8P-6T IT |
256Mb |
Yes |
32Mb |
x8 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V32M8P-6T IT |
MT46V32M8P-6T L |
256Mb |
Yes |
32Mb |
x8 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V32M8P-6T L |
MT46V32M8P-75 |
256Mb |
Yes |
32Mb |
x8 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V32M8P-75 |
MT46V32M8P-75 IT |
256Mb |
Yes |
32Mb |
x8 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
-40C to +85C |
CL = 2.5 |
DDR266B |
MT46V32M8P-75 IT |
MT46V32M8P-75 L |
256Mb |
Yes |
32Mb |
x8 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V32M8P-75 L |
MT46V32M8P-75E |
256Mb |
Yes |
32Mb |
x8 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2 |
DDR266 |
MT46V32M8P-75E |
MT46V32M8P-75Z |
256Mb |
Yes |
32Mb |
x8 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2 |
DDR266A |
MT46V32M8P-75Z |
MT46V32M8TG-5B |
256Mb |
39208 |
32Mb |
x8 |
2.6V |
TSOP |
66-pin |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V32M8TG-5B |
MT46V32M8TG-6 |
256Mb |
39208 |
32Mb |
x8 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V32M8TG-6 |
MT46V32M8TG-6T |
256Mb |
39208 |
32Mb |
x8 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V32M8TG-6T |
MT46V32M8TG-6T IT |
256Mb |
39208 |
32Mb |
x8 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V32M8TG-6T IT |
MT46V32M8TG-6T L |
256Mb |
39208 |
32Mb |
x8 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V32M8TG-6T L |
MT46V32M8TG-75 |
256Mb |
39208 |
32Mb |
x8 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V32M8TG-75 |
MT46V32M8TG-75 IT |
256Mb |
39208 |
32Mb |
x8 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
-40C to +85C |
CL = 2.5 |
DDR266B |
MT46V32M8TG-75 IT |
MT46V32M8TG-75E |
256Mb |
39208 |
32Mb |
x8 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2 |
DDR266 |
MT46V32M8TG-75E |
MT46V32M8TG-75Z |
256Mb |
39208 |
32Mb |
x8 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2 |
DDR266A |
MT46V32M8TG-75Z |
MT46V32M8TG-75Z L |
256Mb |
39208 |
32Mb |
x8 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2 |
DDR266A |
MT46V32M8TG-75Z L |
MT46V64M16P-6T |
1Gb |
Yes |
64Mb |
x16 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V64M16P-6T |
MT46V64M16P-6T IT |
1Gb |
Yes |
64Mb |
x16 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V64M16P-6T IT |
MT46V64M16P-75 |
1Gb |
Yes |
64Mb |
x16 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V64M16P-75 |
MT46V64M16TG-6T |
1Gb |
39208 |
64Mb |
x16 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V64M16TG-6T |
MT46V64M16TG-6T IT |
1Gb |
39208 |
64Mb |
x16 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V64M16TG-6T IT |
MT46V64M16TG-75 |
1Gb |
39208 |
64Mb |
x16 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V64M16TG-75 |
MT46V64M4BG-5B |
256Mb |
Yes |
64Mb |
x4 |
2.6V |
FBGA |
60-ball |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V64M4BG-5B |
MT46V64M4BG-6 |
256Mb |
Yes |
64Mb |
x4 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V64M4BG-6 |
MT46V64M4BG-75 |
256Mb |
Yes |
64Mb |
x4 |
2.5V |
FBGA |
60-ball |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V64M4BG-75 |
MT46V64M4BG-75E |
256Mb |
Yes |
64Mb |
x4 |
2.5V |
FBGA |
60-ball |
133 MHz |
7.5ns |
0C to +70C |
CL = 2 |
DDR266 |
MT46V64M4BG-75E |
MT46V64M4FB-6 |
256Mb |
39208 |
64Mb |
x4 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V64M4FB-6 |
MT46V64M4FG-5B |
256Mb |
39208 |
64Mb |
x4 |
2.6V |
FBGA |
60-ball |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V64M4FG-5B |
MT46V64M4FG-6 |
256Mb |
39208 |
64Mb |
x4 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V64M4FG-6 |
MT46V64M4FG-75 |
256Mb |
39208 |
64Mb |
x4 |
2.5V |
FBGA |
60-ball |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V64M4FG-75 |
MT46V64M4FG-75E |
256Mb |
39208 |
64Mb |
x4 |
2.5V |
FBGA |
60-ball |
133 MHz |
7.5ns |
0C to +70C |
CL = 2 |
DDR266 |
MT46V64M4FG-75E |
MT46V64M4P-5B |
256Mb |
Yes |
64Mb |
x4 |
2.6V |
TSOP |
66-pin |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V64M4P-5B |
MT46V64M4P-6T |
256Mb |
Yes |
64Mb |
x4 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V64M4P-6T |
MT46V64M4P-75 |
256Mb |
Yes |
64Mb |
x4 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V64M4P-75 |
MT46V64M4P-75E |
256Mb |
Yes |
64Mb |
x4 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2 |
DDR266 |
MT46V64M4P-75E |
MT46V64M4P-75Z |
256Mb |
Yes |
64Mb |
x4 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2 |
DDR266A |
MT46V64M4P-75Z |
MT46V64M4TG-5B |
256Mb |
39208 |
64Mb |
x4 |
2.6V |
TSOP |
66-pin |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V64M4TG-5B |
MT46V64M4TG-6T |
256Mb |
39208 |
64Mb |
x4 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V64M4TG-6T |
MT46V64M4TG-75 |
256Mb |
39208 |
64Mb |
x4 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V64M4TG-75 |
MT46V64M4TG-75E |
256Mb |
39208 |
64Mb |
x4 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2 |
DDR266 |
MT46V64M4TG-75E |
MT46V64M4TG-75Z |
256Mb |
39208 |
64Mb |
x4 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2 |
DDR266A |
MT46V64M4TG-75Z |
MT46V64M8BN-5B |
512Mb |
Yes |
64Mb |
x8 |
2.6V |
FBGA |
60-ball |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V64M8BN-5B |
MT46V64M8BN-6 |
512Mb |
Yes |
64Mb |
x8 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V64M8BN-6 |
MT46V64M8BN-6 IT |
512Mb |
Yes |
64Mb |
x8 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V64M8BN-6 IT |
MT46V64M8BN-6 L |
512Mb |
Yes |
64Mb |
x8 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V64M8BN-6 L |
MT46V64M8BN-75 |
512Mb |
Yes |
64Mb |
x8 |
2.5V |
FBGA |
60-ball |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V64M8BN-75 |
MT46V64M8BN-75 IT |
512Mb |
Yes |
64Mb |
x8 |
2.5V |
FBGA |
60-ball |
133 MHz |
7.5ns |
-40C to +85C |
CL = 2.5 |
DDR266B |
MT46V64M8BN-75 IT |
MT46V64M8FN-5B |
512Mb |
39208 |
64Mb |
x8 |
2.6V |
FBGA |
60-ball |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V64M8FN-5B |
MT46V64M8FN-6 |
512Mb |
39208 |
64Mb |
x8 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V64M8FN-6 |
MT46V64M8FN-6 IT |
512Mb |
39208 |
64Mb |
x8 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V64M8FN-6 IT |
MT46V64M8FN-6 L |
512Mb |
39208 |
64Mb |
x8 |
2.5V |
FBGA |
60-ball |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V64M8FN-6 L |
MT46V64M8FN-75 |
512Mb |
39208 |
64Mb |
x8 |
2.5V |
FBGA |
60-ball |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V64M8FN-75 |
MT46V64M8FN-75 IT |
512Mb |
39208 |
64Mb |
x8 |
2.5V |
FBGA |
60-ball |
133 MHz |
7.5ns |
-40C to +85C |
CL = 2.5 |
DDR266B |
MT46V64M8FN-75 IT |
MT46V64M8P-5B |
512Mb |
Yes |
64Mb |
x8 |
2.6V |
TSOP |
66-pin |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V64M8P-5B |
MT46V64M8P-6T |
512Mb |
Yes |
64Mb |
x8 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V64M8P-6T |
MT46V64M8P-6T IT |
512Mb |
Yes |
64Mb |
x8 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V64M8P-6T IT |
MT46V64M8P-6T L |
512Mb |
Yes |
64Mb |
x8 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V64M8P-6T L |
MT46V64M8TG-5B |
512Mb |
39208 |
64Mb |
x8 |
2.6V |
TSOP |
66-pin |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V64M8TG-5B |
MT46V64M8TG-5B IT |
512Mb |
39208 |
64Mb |
x8 |
2.6V |
TSOP |
66-pin |
200 MHz |
5ns |
-40C to +85C |
CL = 3 |
DDR400B |
MT46V64M8TG-5B IT |
MT46V64M8TG-6 |
512Mb |
39208 |
64Mb |
x8 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V64M8TG-6 |
MT46V64M8TG-6T |
512Mb |
39208 |
64Mb |
x8 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V64M8TG-6T |
MT46V64M8TG-6T IT |
512Mb |
39208 |
64Mb |
x8 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V64M8TG-6T IT |
MT46V64M8TG-6T L |
512Mb |
39208 |
64Mb |
x8 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V64M8TG-6T L |
MT46V8M16P-5B |
128Mb |
Yes |
8Mb |
x16 |
2.6V |
TSOP |
66-pin |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V8M16P-5B |
MT46V8M16P-5B IT |
128Mb |
Yes |
8Mb |
x16 |
2.5V |
TSOP |
66-pin |
200 MHz |
5ns |
-40C to +85C |
CL = 3 |
DDR400B |
MT46V8M16P-5B IT |
MT46V8M16P-6T |
128Mb |
Yes |
8Mb |
x16 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V8M16P-6T |
MT46V8M16P-6T IT |
128Mb |
Yes |
8Mb |
x16 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V8M16P-6T IT |
MT46V8M16P-75 |
128Mb |
Yes |
8Mb |
x16 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V8M16P-75 |
MT46V8M16P-75 IT |
128Mb |
Yes |
8Mb |
x16 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
-40C to +85C |
CL = 2.5 |
DDR266B |
MT46V8M16P-75 IT |
MT46V8M16P-75Z |
128Mb |
Yes |
8Mb |
x16 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2 |
DDR266A |
MT46V8M16P-75Z |
MT46V8M16TG-55 |
128Mb |
39208 |
8Mb |
x16 |
2.5V |
TSOP |
66-pin |
183 MHz |
5.5ns |
0C to +70C |
CL = 3 |
DDR400 |
MT46V8M16TG-55 |
MT46V8M16TG-5B |
128Mb |
39208 |
8Mb |
x16 |
2.6V |
TSOP |
66-pin |
200 MHz |
5ns |
0C to +70C |
CL = 3 |
DDR400B |
MT46V8M16TG-5B |
MT46V8M16TG-6 |
128Mb |
39208 |
8Mb |
x16 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V8M16TG-6 |
MT46V8M16TG-6T |
128Mb |
39208 |
8Mb |
x16 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V8M16TG-6T |
MT46V8M16TG-6T IT |
128Mb |
39208 |
8Mb |
x16 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
-40C to +85C |
CL = 2.5 |
DDR333 |
MT46V8M16TG-6T IT |
MT46V8M16TG-6T L |
128Mb |
39208 |
8Mb |
x16 |
2.5V |
TSOP |
66-pin |
167 MHz |
6ns |
0C to +70C |
CL = 2.5 |
DDR333 |
MT46V8M16TG-6T L |
MT46V8M16TG-75 |
128Mb |
39208 |
8Mb |
x16 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V8M16TG-75 |
MT46V8M16TG-75 IT |
128Mb |
39208 |
8Mb |
x16 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
-40C to +85C |
CL = 2.5 |
DDR266B |
MT46V8M16TG-75 IT |
MT46V8M16TG-75 L |
128Mb |
39208 |
8Mb |
x16 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2.5 |
DDR266B |
MT46V8M16TG-75 L |
MT46V8M16TG-75Z |
128Mb |
39208 |
8Mb |
x16 |
2.5V |
TSOP |
66-pin |
133 MHz |
7.5ns |
0C to +70C |
CL = 2 |
DDR266A |
MT46V8M16TG-75Z |
双通道同步动态随机存储器(双信道同步动态随机存取内存)即DDR SDRAM (Double Date Rate Synchronous Dynamic Random Access Memory) 为具有双倍数据传输率之SDRAM,其数据传输速度为系统频率之两倍,由于速度增加,其传输效能优于传统的SDRAM。
1张有184针的DDR内存
DDR是一种继SDRAM后产生的内存技术,DDR,英文原意为“Double Data Rate”,顾名思义,就是双数据传输模式。之所以称其为“双”,也就意味着有“单”,我们日常所使用的SDRAM都是“单数据传输模式”。DDR SDRAM最早是由三星公司于1996年提出,由日本电气、三菱、富士通、东芝、日立、德州仪器、三星及现代等八家公司协议订立的内存规格,并得到了AMD、VIA与SiS等主要芯片组厂商的支持。
这种内存的特性是在一个内存时钟周期中,在一个方波上升沿时进行一次操作(读或写),而DDR则引用了一种新的设计,其在一个内存时钟周期中,在方波上升沿时进行一次操作,在方波的下降沿时也做一次操作,之所以在一个时钟周期中,DDR则可以完成SDRAM两个周期才能完成的任务,所以理论上同速率的DDR内存与SDR内存相比,性能要超出一倍,可以简单理解为100MHZ DDR=200MHZ SDR。
严格的说DDR应该叫DDR SDRAM,人们习惯称为DDR,部分初学者也常看到DDR SDRAM,就认为是SDRAM。DDR SDRAM是Double Data Rate SDRAM的缩写,是双倍速率同步动态随机存储器的意思。DDR内存是在SDRAM内存基础上发展而来的,仍然沿用SDRAM生产体系,因此对于内存厂商而言,只需对制造普通SDRAM的设备稍加改进,即可实现DDR内存的生产,可有效的降低成本。
SDRAM在一个时钟周期内只传输一次数据,它是在时钟的上升期进行数据传输;而DDR内存则是一个时钟周期内传输两次次数据,它能够在时钟的上升期和下降期各传输一次数据,因此称为双倍速率同步动态随机存储器。DDR内存可以在与SDRAM相同的总线频率下达到更高的数据传输率。
与SDRAM相比:DDR运用了更先进的同步电路,使指定地址、数据的输送和输出主要步骤既独立执行,又保持与CPU完全同步;DDR使用了DLL (Delay Locked Loop,延时锁定回路提供一个数据滤波信号)技术,当数据有效时,存储控制器可使用这个数据滤波信号来精确定位数据,每16次输出一次,并重新同步来自不同存储器模块的数据。DDL本质上不需要提高时钟频率就能加倍提高SDRAM的速度,它允许在时钟脉冲的上升沿和下降沿读出数据,因而其速度是标准 SDRA的两倍。
从外形体积上DDR与SDRAM相比差别并不大,他们具有同样的尺寸和同样的针脚距离。但DDR为184针脚,比SDRAM多出了16个针脚,主要包含了新的控制、时钟、电源和接地等信号。DDR内存采用的是支持2.5V电压的SSTL2标准,而不是SDRAM使用的3.3V电压的LVTTL标准。
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