DDR2 reaches a data transfer rate of 4 bits per clock cycle. This enables read and write data with a speed of up to 800MHz compared to a maximum of 400MHz in DDR.
Voltage requirements for DDR2 are greatly reduced from that of DDR; down to 1.8 volts. This translates into a lot less power needed to read and write for the memory.
DDR2 is available in FBGA and uBGA package that not only saves space in the system but enables fine signal integrity.
Package type:FBGA
| Memory |
Config. |
Speed |
CL |
Vdd / Vddq |
Package |
| 512Mb |
128M*4 |
DDR2-400 |
3.0 |
1.8V/1.8V |
FBGA |
| DDR2-533 |
4.0 |
1.8V/1.8V |
| DDR2-667 |
5 |
1.8V/1.8V |
| 64M*8 |
DDR2-400 |
3.0 |
1.8V/1.8V |
FBGA |
| DDR2-533 |
4.0 |
1.8V/1.8V |
| DDR2-667 |
5 |
1.8V/1.8V |
| 32M*16 |
DDR2-400 |
3.0 |
1.8V/1.8V |
FBGA |
| DDR2-533 |
4.0 |
1.8V/1.8V |
| DDR2-667 |
5 |
1.8V/1.8V |
Package type:uBGA
| Memory |
Config. |
Speed |
CL |
Vdd / Vddq |
Package |
| 512Mb |
128M*4 |
DDR2-400 |
3.0 |
1.8V/1.8V |
uBGA |
| DDR2-533 |
4.0 |
1.8V/1.8V |
| DDR2-667 |
5 |
1.8V/1.8V |
| 64M*8 |
DDR2-400 |
3.0 |
1.8V/1.8V |
uBGA |
| DDR2-533 |
4.0 |
1.8V/1.8V |
| DDR2-667 |
5 |
1.8V/1.8V |
| 32M*16 |
DDR2-400 |
3.0 |
1.8V/1.8V |
uBGA |
| DDR2-533 |
4.0 |
1.8V/1.8V |
| DDR2-667 |
5 |
1.8V/1.8V |
|
