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. The pin-out is compatible with the most common 8 Mbit Mask ROM.

■ 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
■ PROGRAMMING VOLTAGE: 12.5V ± 0.25V
■ PROGRAMMING TIME: 100µs/word
■ ELECTRONIC SIGNATURE
   – Manufacturer Code: 20h
   – Device Code: B8h