AT93C46B ATMEL Corporation, AT93C46B Datasheet

AT93C46B

Manufacturer Part Number

AT93C46B

Description

3-Wire Serial E2PROMs

Manufacturer

ATMEL Corporation

Datasheet

1.AT93C46B.pdf (10 pages)

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Features

•

Description

The AT93C46B 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 AT93C46B is available in space saving 8-pin

PDIP and 8-pin JEDEC packages.

The AT93C46B 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 AT93C46B is available in 4.5V to 5.5V, 2.7V to 5.5V, and 2.5V to 5.5V versions.

Pin Configuration

Pin Name

GND

x16 Organization Utilizing “No Connects” for Pins 6 and 7

Low Voltage and Standard Voltage Operation

3-Wire Serial Interface

2 MHz Clock Rate (5V) Compatibility

Self-Timed Write Cycle (10 ms max)

High Reliability

Automotive Grade and Extended Temperature Devices Available

8-Pin PDIP and JEDEC SOIC Packages

– 5.0 (V

– 2.7 (V

– 2.5 (V

– Endurance: 1 Million Cycles

– Data Retention: 100 Years

= 4.5V to 5.5V)

= 2.7V to 5.5V)

= 2.5V to 5.5V)

Function

Chip Select

Serial Data Clock

Serial Data Input

Serial Data Output

Ground

Power Supply

No Connect

8-Pin SOIC

8-Pin PDIP

VCC

GND

VCC

GND

3-Wire

Serial

1K (64 x 16)

AT93C46B

PROMs

0917A-A–11/97

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