TC54256AP (32K x 8) OTP ROM - Toshiba

TC54256AP 256K  OTP ROM by Toshiba.   

Package:  28-pin DIP    OTP (One Time Programmable - NO glass window for wiping)   

Format:  32K x 8-Bit   

Download Toshiba TC54256AP .pdf  datasheet: 

Status: NOS (New Old Stock)   

Tested components:  YES (checked as being unprogrammed)   

RoHS compliant: no   

Why OTP ?   simple, code cannot be overwritten or wiped once programmed.