AI00834B
13
A0-A12
P
Q0-Q7
V
PP
V
CC
M27C64A
G
E
V
SS
8
Figure 1. Logic Diagram
March 1995
M27C64A
64K (8K x 8) UV EPROM and OTP ROM
VERY FAST ACCESS TIME: 150ns
COMPATIBLE with HIGH SPEED
MICROPROCESSORS, ZERO WAIT STATE
LOW POWER “CMOS” CONSUMPTION:
– Active Current 30mA
– Standby Current 100µA
PROGRAMMING VOLTAGE: 12.5V
ELECTRONIC SIGNATURE for AUTOMATED
PROGRAMMING
HIGH SPEED PROGRAMMING
(less than 1 minute)
DESCRIPTION
The M27C64A is a high speed 65,536 bit UV eras-
able 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.
A0 - A12 Address Inputs
Q0 - Q7 Data Outputs
E Chip Enable
G Output Enable
P Program
V
PP
Program Supply
V
CC
Supply Voltage
V
SS
Ground
Table 1. Signal Names
PLCC32 (C)
1
28
FDIP28W (F)
1/11