HM51W16400 Series
HM51W17400 Series
16 M FP DRAM (4-Mword × 4-bit)
4 k Refresh/2 k Refresh
ADE-203-649E (Z)
Rev. 5.0
Nov. 1997
Description
The Hitachi HM51W16400 Series, HM51W17400 Series are CMOS dynamic RAMs organized 4,194,304word × 4-bit. They employ the most advanced 0.5 µm CMOS technology for high performance and low
power. The HM51W16400 Series, HM51W17400 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.
Features
• Single 3.3 V (±0.3 V)
• Access time: 60 ns/70 ns (max)
• Power dissipation
Active mode
: 288mW/252 mW (max) (HM51W16400 Series)
: 324 mW/288 mW (max) (HM51W17400 Series)
Standby mode
: 7.2 mW (max)
: 0.36 mW (max) (L-version)
• Fast page mode capability
• Long refresh period
4096 refresh cycles : 64 ms (HM51W16400 Series)
: 128 ms (L-version)
2048 refresh cycles : 32 ms (HM51W17400 Series)
: 128 ms (L-version)
• 4 variations of refresh
RAS-only refresh
CAS-before-RAS refresh
Hidden refresh
Self refresh (L-version)
• Battery backup operation (L-version)
• Test function