Rainbow Electronics AT93C46C User Manual

Wire serial eeprom, At93c46c, Features

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Features

Low-Voltage and Standard-Voltage Operation

– 2.7 (V

CC

= 2.7V to 5.5V)

– 2.5 (V

CC

= 2.5V to 5.5V)

3-Wire Serial Interface

Schmitt Trigger, Filtered Inputs for Noise Suppression

2 MHz Clock Rate (5V)

Self-Timed Write Cycle (10 ms max)

High Reliability

– Endurance: 1 Million Write Cycles
– Data Retention: 100 Years

Automotive Grade and Extended Temperature Devices Available

8-lead PDIP and 8-lead JEDEC SOIC Packages

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-
lead PDIP and 8-lead JEDEC SOIC 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 2.7V to 5.5V and 2.5V to 5.5V versions.

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

3-Wire
Serial EEPROM

1K (64 x 16)

AT93C46C

Rev. 1122D–SEEPR–08/02

8-lead PDIP

1

2

3

4

8

7

6

5

CS

SK

DI

DO

VCC

DC

NC

GND

8-lead SOIC

1

2

3

4

8

7

6

5

CS

SK

DI

DO

VCC

DC

NC

GND

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