2764A
DESCRIPTION
The M27C64A is a high speed 65,536 bit UV erasable and electrically programmable memory EPROM ideally suited for microprocessor systems requiring large programs. It is organized as 8,192 by 8 bits. The 28 pin Window Ceramic Frit-Seal Dual-in-Line package has transparent lid which allows the user to expose the chip to ultraviolet light to erase the bit pattern. Anew pattern can then be written to the device by following the programming procedure. For applications where the content is programmed only on time and erasure is not required, the M27C64A is offered in Plastic Leaded Chip Carrier package.
Figure 1. Logic Diagram
13 A0-A12
8 Q0-Q7
M27C64A
Table 1. Signal Names
A0
- A12 Q0
- Q7 E G P VPP VCC VSS Address Inputs Data Outputs Chip Enable Output Enable Program Program Supply Supply Voltage Ground
AI00834B
March 1995
1/11
M27C64A
Figure 2A. DIP Pin Connections
Figure 2B. LCC Pin Connections
AI00835
VSS DU Q3 Q4 Q5
AI00836
VPP A12 A7 A6...
