Key Features

• VDD : 2.5V ± 0.2V, VDDQ : 2.5V ± 0.2V for DDR266, 333

• VDD : 2.6V ± 0.1V, VDDQ : 2.6V ± 0.1V for DDR400

• Double-data-rate architecture; two data transfers per clock cycle

• Bidirectional data strobe [DQS] (x4,x8) & [L(U)DQS] (x16)

• Four banks operation

• Differential clock inputs(CK and CK)

• DLL aligns DQ and DQS transition with CK transition

• MRS cycle with address key programs

   -. Read latency : DDR266(2, 2.5 Clock), DDR333(2.5 Clock), DDR400(3 Clock)

   -. Burst length (2, 4, 8)

   -. Burst type (sequential & interleave)

• All inputs except data & DM are sampled at the positive going edge of the system clock(CK)

• Data I/O transactions on both edges of data strobe

• Edge aligned data output, center aligned data input

• LDM,UDM for write masking only (x16)

• DM for write masking only (x4, x8)

• Auto & Self refresh

• 7.8us refresh interval(8K/64ms refresh)

• Maximum burst refresh cycle : 8

• 66pin TSOP II Pb-Free package

• RoHS compliant