1

Features

– 5.0 (V

– 2.7 (V

– 2.5 (V

– Endurance: 1 Million Write Cycles

– Data Retention: 100 Years

– ESD Protection: > 4000V

Description

The AT93C46C provides 1024 bits of serial electrically-erasable programmable read

only memory (EEPROM) organized as 64 words of 16 bits each. The device is opti-

mized for use in many industrial and commercial applications where low-power and

low-voltage operation are essential. The AT93C46C is available in space saving 8-pin

PDIP and 8-pin JEDEC packages.

The AT93C46C is enabled through the Chip Select pin (CS), and accessed via a 3-

wire serial interface consisting of Data Input (DI), Data Output (DO), and Shift Clock

(SK). Upon receiving a READ instruction at DI, the address is decoded and the data is

clocked out serially on the data output pin DO. The WRITE cycle is completely self-

timed and no separate ERASE cycle is required before WRITE. The WRITE cycle is

only enabled when the part is in the ERASE/WRITE ENABLE state. When CS is

brought “high” following the initiation of a WRITE cycle, the DO pin outputs the

READY/BUSY status of the part.

The AT93C46C is available in 4.5V to 5.5V, 2.7V to 5.5V, and 2.5V to 5.5V versions.

3-Wire

Serial EEPROM

1K (64 x 16)

AT93C46C

Rev. 1122A–07/98

3-Wire, 1K

Serial E

Pin Configurations

Pin Name

Function

CS

Chip Select

SK

Serial Data Clock

DI

Serial Data Input

DO

Serial Data Output

GND

Ground

VCC

Power Supply

NC

No Connect

DC

Don’t Connect

8-Pin PDIP

1

2

3

4

8

7

6

5

CS

SK

DI

DO

VCC

DC

NC

GND

8-Pin SOIC

1

2

3

4

8

7

6

5

CS

SK

DI

DO

VCC

DC

NC

GND