M27C512

Description

3/22

1

Description

The M27C512 is a 512 Kbit EPROM offered in the two ranges UV (ultra violet erase) and

OTP (one time programmable). It is ideally suited for applications where fast turn-around

and pattern experimentation are important requirements and is organized as 65536 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 one time and erasure is not

required, the M27C512 is offered in FDIP28W, PDIP28, and PLCC32 packages. In order to

ECOPACK packages are Lead-free. The category of second Level Interconnect is marked

on the package and on the inner box label, in compliance with JEDEC Standard JESD97.

The maximum ratings related to soldering conditions are also marked on the inner box label.

ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.

Figure 1.

Logic diagram

Table 2.

Signal names

Name

Description

Direction

A0-A15

Address Inputs

Inputs

Q0-Q7

Data outputs

Outputs

E

Chip Enable

Input

Output Enable / Program Supply

Input

Supply Voltage

Supply

Ground

Supply

NC

Not Connected Internally

-

DU

Don’t Use

-

AI00761B

16

Q0-Q7

VCC

M27C512

GVPP

VSS

8

A0-A15

E