HN27C256AP-12 Datasheet PDF - Hitachi -> Renesas Electronics

Description
The HN27C256AP/AFP is a 32768-word by 8-bit one time electrically programmable ROM. Initially, all bits of the HN27C256AP/AFP are in the “1” State (Output High). Data is introduced by selectively programming “0” into the desired bit locations. This device is packaged in a 28-pin plastic package (DIP, SOP). Therefore, this device cannot be re-written.

FEATUREs
• High speed
   Access time: 120/150 ns (max)
• Low power dissipation
   Active mode: 25 mW (typ) (f = 1 MHz)
   Standby mode: 5 µW (typ)
• High reliability and fast programming
   Programming voltage: +12.5 V DC
   Fast High-Reliability Programming Algorithm available
• Device identifier mode Manufacturer code and device code