UVEPROM

UVEPROM

UVEPROM

UVEPROM

UVEPROM

AS27C256

AS27C256

Rev. 2.0 7/06

Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.

1

Austin Semiconductor, Inc.

FEATURES

• Organized 32,768 x 8

• Single +5V ±10% power supply

• Pin-compatible with existing 256K ROM’s and EPROM’s

• All inputs/outputs fully TTL compatible

• Power-saving CMOS technology

• Very high-speed FLASHRITE Pulse Programming

• 3-state output buffers

• 400-mV DC assured noise immunity with standard TTL

loads

• Latchup immunity of 250 mA on all input and output pins

• Low power dissipation (CMOS Input Levels)

-Active - 165mW Worst Case

-Standby - 1.7mW Worst Case (CMOS-input levels)

* FUTURE High Speed Offerings: 55ns, 70ns, 90ns

OPTIONS

MARKING

• Timing

120ns access

-12

150ns access

-15

170ns access

-17

200ns access

-20

250ns access

-25

300ns access

-30

55ns access

-55

70ns access

-70

90ns access

-90

• Package(s)

Ceramic DIP (600mils)

J

No. 110

Ceramic LCC (450 x 550 mils) ECA No. 208

• Processing / Operating Temperature Ranges

M

Industrial (-40°C to +85°C)

I

XT

PIN ASSIGNMENT

(Top View)

AVAILABLE AS MILITARY

SPECIFICATIONS

• -55C to 125C operation

• MILITARY Processing Method MIL-PRF-38535, Class Q

• Commercial Version Available

28-Pin DIP (J)

(600 MIL)

256K UVEPROM

UV Erasable Programmable

Read-Only Memory

For more products and information

please visit our web site at

www.austinsemiconductor.com

1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

V

PP

A12

A7

A6

A5

A4

A3

A2

A1

A0

DQ0

DQ1

DQ2

GND

Vcc

A14

A13

A8

A9

A11

G\

A10

E\

DQ7

DQ6

DQ5

DQ4

DQ3

32-Pin LCC (ECA)

(450 x 550 mils)

Pin Name

Function

4 3 2 1 32 31 30

14 15 16 17 18 19 20

5

6

7

8

9

10

11

12

13

A7

A6

A5

A4

A3

A2

A1

A0

DQ1

29

28

27

26

25

24

23

22

21

WE

A13

A8

A9

A11

OE

A10

CE1

DQ8

\

\

\

A6

A5

A4

A3

A2

A1

A0

NC

DQ0

A8

A9

A11

NC

G\

A10

E\

DQ7

DQ6

Pin Name

Function

A0 - A14 Address Inputs

DQ0-DQ7 Inputs (programming)/Outputs

E\

Chip Enable/Power Down

G\

Output Enable

GND

Ground

5V Supply

13V Programming Power Supply