© 1996 Microchip Technology Inc.

DS20067G-page 1

FEATURES

• Single supply with programming operation down

to 1.8V

• Low power CMOS technology

- 70

-2

• ORG pin selectable memory configuration

- 128 x 8- or 64 x 16-bit organization (93AA46)

- 256 x 8- or 128 x 16-bit organization

(93AA56)

- 512 x 8 or 256 x 16 bit organization (93AA66)

• Self-timed ERASE and WRITE cycles

(including auto-erase)

• Automatic ERAL before WRAL

• Power on/off data protection circuitry

• Industry standard 3-wire serial I/O

• Device status signal during ERASE/WRITE cycles

• Sequential READ function

• 10,000,000 ERASE/WRITE cycles guaranteed on

93AA56 and 93AA66

• 1,000,000 E/W cycles guaranteed on 93AA46

• Data retention > 200 years

• 8-pin PDIP/SOIC

(SOIC in JEDEC and EIAJ standards)

• Temperature ranges supported

DESCRIPTION

The Microchip Technology Inc. 93AA46/56/66 are 1K,

2K and 4K low voltage serial Electrically Erasable

PROMs. The device memory is configured as x8 or x16

bits depending on the ORG pin setup. Advanced

CMOS technology makes these devices ideal for low

power non-volatile memory applications. The 93AA

Series is available in standard 8-pin DIP and surface

mount SOIC packages. The rotated pin-out 93AA46X/

56X/66X are offered in the “SN” package only.

- Commercial (C):

0

°C to +70°C

PACKAGE TYPES

BLOCK DIAGRAM

1

2

3

4

8

7

6

5

CS

CLK

DI

DO

SS

V

NU

ORG

V

CC

1

2

3

4

8

7

6

5

SS

V

NU

ORG

V

CC

CS

CLK

DI

DO

1

2

3

4

8

7

6

5

ORG

Vss

DO

DI

NU

Vcc

CS

CLK

DIP

SOIC

SOIC

MEMORY

ARRAY

ADDRESS

DECODER

DATA REGISTER

DO

MODE

DECODE

LOGIC

CLOCK

GENERATOR

OUTPUT

BUFFER

DI

CS

ORG

CLK

ADDRESS

COUNTER

93AA46/56/66

Microwire is a registered trademark of National Semiconductor Incorporated.

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