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M27C400 Datasheet 4 Mbit 512kb X8 Or 256kb X16 Uv Eprom And Otp Eprom

Manufacturer: STMicroelectronics

Overview: M27C400 4 Mbit (512Kb x8 or 256Kb x16) UV EPROM and OTP EPROM s 5V ± 10% SUPPLY VOLTAGE in READ OPERATION ACCESS TIME: 55ns BYTE-WIDE or WORD-WIDE CONFIGURABLE 4 Mbit MASK ROM REPLACEMENT LOW POWER CONSUMPTION – Active Current 70mA at 8MHz – Stand-by Current 100µA 40 40 s s s s 1 1 FDIP40W (F) PDIP40 (B) s s s PROGRAMMING VOLTAGE: 12.5V ± 0.25V PROGRAMMING TIME: 100µs/word ELECTRONIC SIGNATURE – Manufacturer Code: 20h – Device Code: B8h Figure 1.

General Description

The M27C400 is an 4 Mbit EPROM offered in the two ranges UV (ultra violet erase) and OTP (one time programmable).

It is ideally suited for microprocessor systems requiring large data or program storage.

It is organised as either 512 Kwords of 8 bit or 256 Kwords of 16 bit.

Key Features

  • a 2-line control function which accommodates the use of multiple memory connection. The two-line control function allows: a. the lowest possible memory power dissipation b. complete assurance that output bus contention will not occur. For the most efficient use of these two control lines, E should be decoded and used as the primary device selecting function, while G should be made a common connection to all devices in the array and connected to the READ line from the system control bus. This en.

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