View 274002 datasheet:

M27C4002 4 Megabit (256K x 16) UV EPROM and OTP EPROM FAST ACCESS TIME: 70ns LOW POWER ”CMOS” CONSUMPTION: – Active Current 50mA at 5MHz – Standby Current 100µA 40 PROGRAMMING VOLTAGE: 12.75V ELECTRONIC SIGNATURE for AUTOMATED 1 PROGRAMMING FDIP40W (F) JLCC44W (J) PROGRAMMING TIMES of AROUND 24sec. (PRESTO II ALGORITHM) DESCRIPTION The M27C4002 is a high speed 4 Megabit UV PLCC44 (C) TSOP40 (N) erasable and electrically programmable EPROM 10 x 20 mm ideally suited for microprocessor systems requiring large programs. It is organised as 262,144 by 16 bits. The Window Ceramic Frit-Seal Dual-in-Line and Figure 1. Logic Diagram J-Lead Chip Carrier packages have transparent lids which allow the user to expose the chip to ultraviolet light to erase the bit pattern. A new