M27C64A
64 Kbit (8Kb x 8) UV EPROM and OTP EPROM
5V
±
10% SUPPLY VOLTAGE in READ
OPERATION
FAST ACCESS TIME: 150ns
LOW POWER “CMOS” CONSUMPTION:
– Active Current 30mA
– Standby Current 100µA
PROGRAMMING VOLTAGE: 12.5V
±
0.25V
HIGH SPEED PROGRAMMING
(less than 1 minute)
ELECTRONIC SIGNATURE
– Manufacturer Code: 9Bh
– Device Code: 08h
DESCRIPTION
The M27C64A is a 64Kbit EPROM offered in the
two ranges UV (ultra violet erase) and OTP (one
time programmable). It is ideally suited for micro-
processor systems requiring large programs and is
organized as 8,192 by 8 bits.
The FDIP28W (window ceramic frit-seal package)
has 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 on time and erasure is not required, the
M27C64A is offered in PLCC32 package.
28
1
PLCC32 (C)
FDIP28W (F)
Figure 1. Logic Diagram
VCC
VPP
13
A0-A12
8
Q0-Q7
Table 1. Signal Names
A0-A12
Q0-Q7
E
G
P
V
PP
V
CC
V
SS
March 1998
Address Inputs
Data Outputs
Chip Enable
Output Enable
P
E
G
M27C64A
VSS
Program
Program Supply
Supply Voltage
Ground
1/12
AI00834B
STMICROELECTRONICS [ STMICROELECTRONICS ]
