HN58V256AI Series
256k EEPROM (32-kword × 8-bit)
Wide Temperature Range version
ADE-203-616C (Z)
Rev. 3.0
Oct. 24, 1997
Description
The Hitachi HN58V256A is electrically erasable and programmable ROM organized as 32768-word × 8-bit.
It has realized high speed low power consumption and high reliability by employing advanced MNOS
memory technology and CMOS process and circuitry technology. They also have a 64-byte page
programming function to make their write operations faster.
Features
• Single 3 V supply: 2.7 to 5.5
• Access time: 120 ns max
• Power dissipation:
Active: 20 mW/MHz, (typ)
Standby: 110 µW (max)
• On-chip latches: address, data, CE, OE, WE
• Automatic byte write: 10 ms max
• Automatic page write (64 bytes): 10 ms max
• Data polling and Toggle bit
• Data protection circuit on power on/off
• Conforms to JEDEC byte-wide standard
• Reliable CMOS with MNOS cell technology
• 105 erase/write cycles (in page mode)
• 10 years data retention
• Software data protection
• Operating temperature range: –40 to 85˚C