Description
The Hitachi HN58S256A is a electrically erasable and programmable EEPROM’s organized as 32768-word × 8-bit employing advanced MNOS memory technology and CMOS process and circuitry technology. It also has a 64-byte page programming function to make the write operations faster.

Features
• Single supply: 2.2 to 3.6 V
• Access time: 150 ns (max)/200 ns (max)
• Power dissipation:
    - Active: 10 mW/MHz, (typ)
    - Standby: 36 µW (max)
• On-chip latches: address, data, CE, OE, WE
• Automatic byte write: 15 ms (max)
• Automatic page write (64 bytes): 15 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
• Industrial versions (Temperatur range:–40 to 85˚C) are also available.