M27W064

Note: 1. Minimum voltage may undershoot to 2V for less than 20ns during transitions.
          2. Maximum voltage may overshoot to V_CC +2V for less than 20ns during transitions.
          3. Maximum voltage may overshoot to 14.0V for less than 20ns during transitions. V_PP must
              not remain at V_HH for more than a total of 80hrs.

The M27W064 is a 64 Mbit (4Mb x16) non-volatile, One Time Programmable (OTP), FlexibleROM™ Memory. Read operations can be performed using a single low voltage (2.7 to 3.6V) supply. Program operations require an additional V_PP (11.4 to 12.6V) power supply. On power-up the memory defaults to Read mode where it can be read in the same way as a ROM or EPROM.

Program commands M27W064 are written to the Command Interface of the memory. An on-chip Program Controller (PC simplifies the process of programming the memory by taking care of all of the special operations that are required to update the memory contents.

The M27W064 features an innovative command, Multiple Word Program, used to program large streams of data. It greatly reduces the total programming time when a large number of Words are written to the memory at any one time. Using this command the entire memory can be programmed in 8s, compared to 36s using the standard Word Program.

The end of a program operation can be detected and any error conditions identified. The command set required to control the memory is consistent with JEDEC standards.

Chip Enable and Output Enable signals control the bus operation of the memory. They allow simple connection to most microprocessors, often without additional logic.

The memory M27W064 is offered in SO44 and TSOP48 (12 x 20mm) packages. The memory is supplied with all the bits set to '1'.