HN58V257A Overview
The Hitachi HN58V256A and HN58V257A are electrically erasable and programmable ROMs organized as 32768-word × 8-bit. They have 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.
HN58V257A Key Features
- Single 3 V supply: 2.7 to 5.5 V
- Access time: 120 ns max
- Power dissipation
- On-chip latches: address, data, CE, OE, WE
- Automatic byte write: 10 ms max
- Automatic page write (64 bytes): 10 ms max
- Ready/Busy (only the HN58V257A series)
- Data polling and Toggle bit
- Data protection circuit on power on/off
- Conforms to JEDEC byte-wide standard