Datasheet > HM538253B

HM538253B

更新时间： 2024-09-15 05:36:11

品牌	Logo	应用领域
尔必达 - ELPIDA		/
页数	文件大小	规格书
56页	533K
描述
2 M VRAM (256-kword x 8-bit) Hyper Page Mode (HM538254B)

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HM538253B 数据手册

HM538253B Series

HM538254B Series

2 M VRAM (256-kword × 8-bit)

Hyper Page Mode (HM538254B)

E0163H10 (Ver. 1.0)

(Previous ADE-203-264A/265 (Z))

Jul. 6, 2001 (K)

Description

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.

Features

•

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.

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与HM538253B相关器件

型号	品牌	获取价格	描述	数据表
HM538253BJ-10	ELPIDA	获取价格	2 M VRAM (256-kword x 8-bit) Hyper Page Mode (HM538254B)
HM538253BJ-7	ELPIDA	获取价格	2 M VRAM (256-kword x 8-bit) Hyper Page Mode (HM538254B)
HM538253BJ-8	ELPIDA	获取价格	2 M VRAM (256-kword x 8-bit) Hyper Page Mode (HM538254B)
HM538253BRR-6	HITACHI	获取价格	Video DRAM, 256KX8, 60ns, CMOS, PDSO40, TSOP-44/40
HM538253BRR-8	HITACHI	获取价格	Video DRAM, 256KX8, 80ns, CMOS, PDSO40, TSOP-44/40
HM538253BTT-10	ELPIDA	获取价格	2 M VRAM (256-kword x 8-bit) Hyper Page Mode (HM538254B)
HM538253BTT-7	ELPIDA	获取价格	2 M VRAM (256-kword x 8-bit) Hyper Page Mode (HM538254B)
HM538253BTT-8	ELPIDA	获取价格	2 M VRAM (256-kword x 8-bit) Hyper Page Mode (HM538254B)
HM538253J-10	ETC	获取价格	Fast Page Mode VRAM
HM538253J-7	ETC	获取价格	Fast Page Mode VRAM