Product Identification System

To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.

Product Family

Serial EEPROM with

a Security Register

Device Density & Feature

Shipping Carrier Option

Package Device Grade or

Wafer/Die Thickness

Package Option

W04 = 4-Kbit with

Software Write Protection

W08 = 8-Kbit with

Software Write Protection

T = Tape and Reel

Operating Voltage

M = 1.7V to 3.6V

U = Industrial Temperature Range

(-40°C to +85°C)

11 = 11 mil Wafer Sale Thickness

ST = SOT23

U = 2 x 2 Grid Array, WLCSP

WW = Wafer Sale

A T24CSW040-STUMXX-T

Product Variation

XX = Applies to selected packages only

08 = Backside Coated WLCSP

Hardware Client Address

(4-Kbit Device)

0 = A

2 = A

4 = A

6 = A

0 = A

4 = A

Hardware Client Address

(8-Kbit Device)

Examples

Device

Package Package

Drawing

Code

Package

Option

Shipping Carrier Option

Device Grade

AT24CSW040‑STUM‑T

SOT23

4U‑13

ST

Tape and Reel

Industrial Temperature

(-40°C to +85°C)

AT24CSW080‑STUM‑T

SOT23

4U‑13

ST

Tape and Reel

AT24CSW040‑UUM0B‑T

WLCSP

4U‑13

U

Tape and Reel

AT24CSW080‑UUM0B‑T

WLCSP

4U‑13

U

Tape and Reel

Microchip Devices Code Protection Feature

Note the following details of the code protection feature on Microchip devices:

• Microchip products meet the specifications contained in their particular Microchip Data Sheet.

• Microchip believes that its family of products is secure when used in the intended manner and under normal

conditions.

• There are dishonest and possibly illegal methods being used in attempts to breach the code protection features

of the Microchip devices. We believe that these methods require using the Microchip products in a manner

outside the operating specifications contained in Microchip’s Data Sheets. Attempts to breach these code

protection features, most likely, cannot be accomplished without violating Microchip’s intellectual property rights.

• Microchip is willing to work with any customer who is concerned about the integrity of its code.

AT24CSW04X/AT24CSW08X

and its subsidiaries

Datasheet

DS20006426B-page 40