HN58C256A Series
HN58C257A Series
256k EEPROM (32-kword
×
8-bit)
Ready/Busy and
RES
function (HN58C257A)
ADE-203-410D (Z)
Rev. 4.0
Oct. 24, 1997
Description
The Hitachi HN58C256A and HN58C257A 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.
Features
•
Single 5 V supply: 5 V ±10%
•
Access time: 85 ns/100 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
•
Ready/Busy (only the HN58C257A series)
•
Data
polling and Toggle bit
•
Data protection circuit on power on/off
•
Conforms to JEDEC byte-wide standard
•
•
•
•
•
•
Reliable CMOS with MNOS cell technology
10
5
erase/write cycles (in page mode)
10 years data retention
Software data protection
Write protection by
RES
pin (only the HN58C257A series)
Industrial versions (Temperatur range: – 20 to 85˚C and – 40 to 85˚C) are also available.
HITACHI [ HITACHI SEMICONDUCTOR ]
