M27C400 4 Mbit (512Kb x8 or 256Kb x16) UV EPROM an.
M27C400 - 4 Mbit 512Kb x8 or 256Kb x16 UV EPROM and OTP EPROM
AM27C400 - ROM Compatible CMOS EPROM
M27C4002 - 4 Mbit (256Kb x16) UV EPROM and OTP EPROM
M27C4001 - 4 Mbit (512Kb x 8) UV EPROM and OTP EPROM