描述 Description

The Hitachi HM5116400 Series, HM5117400 Series are CMOS dynamic RAMs organized 4,194,304-word x 4-bit. They employ the most advanced 0.5 m CMOS technology for high performance and low power. The HM5116400 Series, HM5117400 Series offer Fast Page Mode as a high speed access mode. They have package variations of standard 300-mil 26-pin plastic SOJ and standard 300-mil 26-pin plastic TSOP.

特性 Features

? Single 5 V ( 10)

? Access time: 50 ns/60 ns/70 ns (max)

? Power dissipation

- Active mode : 495 mW/440 mW/385 mW (max) (HM5116400 Series)

: 550 mW/495 mW/440 mW (max) (HM5117400 Series)

- Standby mode : 11 mW (max)

: 0.83 mW (max) (L-version)

? Fast page mode capability

? Long refresh period

- 4096 refresh cycles : 64 ms (HM5116400 Series)

: 128 ms (L-version)

- 2048 refresh cycles : 32 ms (HM5117400 Series)

: 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