AI00834B

13

A0-A12

P

Q0-Q7

VPP

VCC

M27C64A

G

E

VSS

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 100

µA

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

Program Supply

Supply Voltage

Ground

Table 1. Signal Names

PLCC32 (C)

1

28

FDIP28W (F)

1/11