HM514400BL中文资料日立数据手册PDF规格书

The Hitachi HM514400B/BL, HM514400C/CL are CMOS dynamic RAM organized 1,048,576-word × 4-bit. HM514400B/BL, HM514400C/CL have realized higher density, higher performance and various functions by employing 0.8 µm CMOS process technology and some new CMOS circuit design technologies. The HM514400B/BL, HM514400C/CL offer Fast Page Mode as a high speed access mode. Multiplexed address input permits the HM514400B/BL, HM514400C/CL to be packaged in standard 300-mil 26-pin plastic SOJ, standard 400-mil 20-pin plastic ZIP and 26-pin plastic TSOP II.

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)

0.55 mW (max) (L-version)

• Fast page mode capability

• 1024 refresh cycles : 16 ms

1024 refresh cycles : 128 ms (L-version)

• 3 variations of refresh

— RAS-only refresh

— CAS-before-RAS refresh

— Hidden refresh

• Test function

• Battery back up operation

— HM514400BL Series (L-version)

— HM514400CL Series (L-version)