AI00769B

14

A0-A13

P

Q0-Q7

VPP

VCC

M27128A

G

E

VSS

8

Figure 1. Logic Diagram

M27128A

NMOS 128K (16K x 8) UV EPROM

FAST ACCESS TIME: 200ns

EXTENDED TEMPERATURE RANGE

SINGLE 5 V SUPPLY VOLTAGE

LOW STANDBY CURRENT: 40mA max

TTL COMPATIBLE DURING READ and

PROGRAM

FAST PROGRAMMING ALGORITHM

ELECTRONIC SIGNATURE

PROGRAMMING VOLTAGE: 12V

DESCRIPTION

The M27128A is a 131,072 bit UV erasable and

electrically programmable memory EPROM. It is

organized as 16,384 words by 8 bits.

The M27128A is housed in a 28 Pin Window Ce-

ramic Frit-Seal Dual-in-Line package. The trans-

parent lid 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 follow-

ing the programming procedure.

A0 - A13

Address Inputs

Q0 - Q7

Data Outputs

E

Chip Enable

G

Output Enable

P

Program

Program Supply

Supply Voltage

Ground

Table 1. Signal Names

1

28

FDIP28W (F)

March 1995

1/10