25LC128
M27C512-4 (2)M27C512 (25)M27C (138)M27 (190)

STMicroelectronics

M27C512-45C1

IC OTP 512KBIT 45NS 32PLCC
STMicroelectronics

M27C512-45XF1

IC EPROM UV 512KBIT 45NS 28CDIP

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