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HM538254BTT-10 参数 Datasheet PDF下载

HM538254BTT-10图片预览
型号: HM538254BTT-10
PDF下载: 下载PDF文件 查看货源
内容描述: 的2M的VRAM ( 256千字×8位)的超页模式( HM538254B ​​) [2 M VRAM (256-kword x 8-bit) Hyper Page Mode (HM538254B)]
分类和应用:
文件页数/大小: 56 页 / 533 K
品牌: ELPIDA [ ELPIDA MEMORY ]
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Description
Features
HM538253B Series
HM538254B Series
2 M VRAM (256-kword
×
8-bit)
Hyper Page Mode (HM538254B)
The HM538253B/HM538254B is a 2-Mbit multiport video RAM equipped with a 256-kword
×
8-bit dynamic
RAM and a 512-word
×
8-bit SAM (full-sized SAM). Its RAM and SAM operate independently and
asynchronously. The HM538253B/HM538254B is upwardly compatible with the HM534253B/HM538123B
except that the pseudo-write-transfer cycle is replaced with masked-write-transfer cycle, which has been
approved by JEDEC. Furthermore, several new features have been added to the HM538253B/HM538254B
which do not conflict with the conventional features. The stopping column feature realizes allows greater
flexibility for split SAM register lengths. Persistent mask is also installed according to the TMS34020
features. The HM538254B has Hyper page mode which enables fast page cycle.
Multiport organization:RAM and SAM can operate asynchronously and simultaneously:
RAM: 256-kword
×
8-bit
SAM: 512-word
×
8-bit
Access time
RAM: 70 ns/80 ns/100 ns max
SAM: 20 ns/23 ns/25 ns max
Cycle time
RAM: 130 ns/150 ns/180 ns min
SAM: 25 ns/28 ns/30 ns min
Low power
Active
RAM: 605 mW/550 mW/495 mW
SAM: 358 mW/330 mW/303 mW
Standby 38.5 mW max
Masked-write-transfer cycle capability
Stopping column feature capability
Persistent mask capability
Elpida Memory, Inc. is a joint venture DRAM company of NEC Corporation and Hitachi, Ltd.
LP
E0163H10 (Ver. 1.0)
(Previous ADE-203-264A/265 (Z))
Jul. 6, 2001 (K)
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