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Atmel AT24CS01/02 [PRELIMINARY DATASHEET]

8815A–SEEPR–6/12

1.

Description

Read-only Memory (EEPROM) organized as 128/256 words of eight bits each. The device is optimized for use in many

industrial and commercial applications where low-power and low-voltage operation are essential. The AT24CS01/02 is

available in space-saving, 8-lead JEDEC SOIC, 8-lead TSSOP, 8-pad UDFN and 5-lead SOT23 packages and is

The AT24CS01/02 provides the additional feature of a factory programmed, guaranteed unique 128-bit serial number,

while maintaining all of the traditional features available in the 1-Kbit or 2-Kbit Serial EEPROM. The time consuming step

of performing and ensuring true serialization of product on a manufacturing line can be removed from the production flow

by employing the CS Series Serial EEPROM. The 128-bit serial number is programmed and permanently locked from

future writing during the Atmel production process. Further, this 128-bit location does not consume any of the user

read/write area of the 1-Kbit or 2-Kbit Serial EEPROM. The uniqueness of the serial number is guaranteed across the

entire CS Series of Serial EEPROMs, regardless of the size of the memory array or the type of interface protocol. This

means that as an application's needs for memory size or interface protocol evolve in future generations, any previously

deployed serial number from any Atmel CS Series Serial EEPROM part will remain valid.

2.

Pin Descriptions and Pinout

Figure 2-1. Pin Configuration

Note:

For use of 5-lead SOT23, the software A2, A1, and A0 bits in the device address word must be set to

zero to properly communicate with the device.

Pin Name

Function

Address Inputs

SDA

Serial Data

SCL

Serial Clock Input

WP

Write Protect

GND

Ground

Power Supply

1

2

3

4

8

7

6

5

GND

WP

SCL

SDA

8-lead SOIC

1

2

3

5

4

SCL

GND

SDA

WP

5-lead SOT23

1

2

3

4

8

7

6

5

WP

SCL

SDA

GND

8-pad UDFN

Bottom View

1

2

3

4

8

7

6

5

GND

WP

SCL

SDA

8-lead TSSOP