1

Features

– 1K: 128 x 8 or 64 x 16

– Endurance: 1 Million Write Cycles

– Data Retention: 100 Years

(MLP 2x3), 8-lead TSSOP and 8-ball dBGA2 Packages

Description

The AT93C46 provides 1024 bits of serial electrically erasable programmable read-

only memory (EEPROM), organized as 64 words of 16 bits each (when the ORG pin is

connected to VCC), and 128 words of 8 bits each (when the ORG pin is tied to

ground). The device is optimized for use in many industrial and commercial applica-

tions where low-power and low-voltage operations are essential. The AT93C46 is

available in space-saving 8-lead PDIP, 8-lead JEDEC SOIC, 8-lead EIAJ SOIC, 8-lead

Ultra Thin mini-MAP (MLP 2x3), 8-lead TSSOP, and 8-lead dBGA2 packages.

The AT93C46 is enabled through the Chip Select pin (CS) and accessed via a

three-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 DO pin. 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 AT93C46 is available in 2.7V to 5.5V and 1.8V to 5.5V versions.

Table 1. 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

ORG

Internal Organization

DC

Don’t Connect

Three-wire

Serial

EEPROM

1K (128 x 8 or 64 x 16)

AT93C46

Note: Not recommended for new

design; please refer to

AT93C46D datasheet.

5140B–SEEPR–2/07

1

2

3

4

8

7

6

5

CS

SK

DI

DO

VCC

DC

ORG

GND

VCC

DC

ORG

GND

CS

SK

D1

D0

1

2

3

4

8

7

6

5

1

2

3

4

8

7

6

5

CS

SK

DI

DO

VCC

DC

ORG

GND

1

2

3

4

8

7

6

5

DC

VCC

CS

SK

ORG

GND

DO

DI

1

2

3

4

8

7

6

5

VCC

DC

ORG

GND

CS

SK

DI

DO

1

2

3

4

8

7

6

5

CS

SK

DI

DO

VCC

DC

ORG

GND

8-lead SOIC

8-lead dBGA2

8-lead PDIP

8-lead SOIC

Rotated (R)

(1K JEDEC Only)

8-lead Ultra Thin mini-MAP (MLP 2x3)

8-lead TSSOP

Bottom View

Bottom View