HM5425401B Datasheet (256M SSTL_2 interface DDR SDRAM 143 MHz/133 MHz/125 MHz/100 MHz 4-Mword 16-bit 4-bank/8-Mword 8-bit 4-bank/ 16-Mword 4-bit 4-bank)

Part: HM5425401B
Manufacturer: Elpida Memory
Size: 489.71 KB

Related Elpida Memory Datasheets

Part Number	Description
HM5425161B	256M SSTL_2 interface DDR SDRAM 143 MHz/133 MHz/125 MHz/100 MHz 4-Mword 16-bit 4-bank/8-Mword 8-bit 4-bank/ 16-Mword 4-bit 4-bank
HM5425801B	256M SSTL_2 interface DDR SDRAM 143 MHz/133 MHz/125 MHz/100 MHz 4-Mword 16-bit 4-bank/8-Mword 8-bit 4-bank/ 16-Mword 4-bit 4-bank
HM5117805	16 M EDO DRAM (2-Mword X 8-bit) 2 k Refresh
HM51W16165	(HM51W16165 / HM51W18165) 16M EDO DRAM
HM51W16405	(HM51W16405 / HM51W17405) 16M EDO DRAM

Elpida Memory datasheets

HM5425401B Description

The HM5425161B, the HM5425801B and the HM5425401B are the Double Data Rate (DDR) SDRAM devices. Read and write operations are performed at the cross points of the CLK and the CLK. This high speed data transfer is realized by the 2-bit prefetch piplined architecture.

HM5425401B Key Features

Programmable burst sequence  Sequential  Interleave
Start addressing capability  Even and Odd
Programmable CAS latency: 2/2.5
8192 refresh cycles: 7.8 µs (64 ms/8192 cycles)
2 variations of refresh  Auto refresh  Self refresh