DESCRIPTION
●The M27C256B is a 256 Kbit EPROM offered in the two ranges UV (ultra violet erase) and OTP (one time programmable). It is ideally suited for microprocessor systems and is organized as 32,768 by 8 bits.
●The FDIP28W (window ceramic frit-seal package) has a transparent lid which allows the user to expose the chip to ultraviolet light to erase the bit pattern. A new pattern can then be written to the device by following the programming procedure.
●For applications where the content is programmed only one time and erasure is not required, the M27C256B is offered in PDIP28, PLCC32 and TSOP28 (8 x 13.4 mm) packages.
●■ 5V ± 10% SUPPLY VOLTAGE in READ OPERATION
●■ ACCESS TIME: 45ns
●■ LOW POWER CONSUMPTION:
● – Active Current 30mA at 5MHz
● – Standby Current 100µA
●■ PROGRAMMING VOLTAGE: 12.75V ± 0.25V
●■ PROGRAMMING TIME: 100µs/word
●■ ELECTRONIC SIGNATURE
● – Manufacturer Code: 20h
● – Device Code: 8Dh
