HM5117400B中文资料日立数据手册PDF规格书

描述 Description

The Hitachi HM5117400B is a CMOS dynamic RAM organized 4,194,304 word 4 bit. It employs the most advanced CMOS technology for high performance and low power. The HM5117400B offers Fast Page Mode as a high speed access mode.

特性 Features

• Single 5 V (±10)

• High speed

- Access time : 60 ns/ 70 ns/ 80 ns (max)

• Low power dissipation

- Active mode : 605 mW/550 mW/495 mW(max)

- Standby mode : 11 mW (max)

: 0.83 mW (max) (L-version)

• Fast page mode capability

• Long refresh period

- 2048 refresh cycles : 32 ms

: 128 ms (L-version)

3 variations of refresh

- RAS-only refresh

- CAS-before-RAS refresh

- Hidden refresh

• Battery backup operation (L-version)

• Test function

- 16-bit parallel test mode