GENERAL DESCRIPTION

FOR 1M x 32Bit x 4 Bank DDR SDRAM

The K4D263238D is 134,217,728 bits of hyper synchronous data rate Dynamic RAM organized as 4 x 1,048,576 words by 32 bits, fabricated with SAMSUNG′s high performance CMOS technology. Synchronous features with Data Strobe allow extremely high performance up to 2.0GB/s/chip. I/O transactions are possible on both edges of the clock cycle. Range of operating frequencies, programmable burst length and programmable latencies allow the device to be useful for a variety of high performance memory system applications.

FEATURES

• 2.5V ± 5 power supply

• SSTL_2 compatible inputs/outputs

• 4 banks operation

• MRS cycle with address key programs

-. Read latency 3,4 (clock)

-. Burst length (2, 4, 8 and Full page)

-. Burst type (sequential & interleave)

• Full page burst length for sequential burst type only

• Start address of the full page burst should be even

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

• Differential clock input

• No Write Interrupted by Read function

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

• DLL aligns DQ and DQS transitions with Clock transition

• Edge aligned data & data strobe output

• Center aligned data & data strobe input

• DM for write masking only

• Auto & Self refresh

• 32ms refresh period (4K cycle)

• 100pin TQFP package

• Maximum clock frequency up to 250MHz

• Maximum data rate up to 500Mbps/pin