Features

• Low-voltage and Standard-voltage Operation

─ 1.8 (V

• Internally Organized 512 x 8 (4K), or 1024 x 8 (8K)

• Two-wire Serial Interface

• Schmitt Trigger, Filtered Inputs for Noise Suppression

• Bidirectional Data Transfer Protocol

• 1 MHz (5V), 400 kHz (1.8V, 2.5V, 2.7V) Compatibility

• Write Protect Pin for Hardware Data Protection

• 16-byte Page (4K, 8K) Write Modes

• Partial Page Writes Allowed

• Self-timed Write Cycle (5 ms max)

• High-reliability

─ Endurance: 1 Million Write Cycles

─ Data Retention: 100 Years

• 8-lead PDIP, 8-lead JEDEC SOIC, 8-lead Ultra-Thin Mini-MAP (MLP 2x3), 5-lead

SOT23, 8-lead TSSOP and 8-ball dBGA2 Packages

• Lead-free/Halogen-free

• Die Sales: Wafer Form and Tape and Reel

Description

The AT24C04B/08B provides 4096/8192 bits of serial electrically erasable and

programmable read-only memory (EEPROM) organized as 512/1024 words of 8 bits

each. The device is optimized for use in many industrial and commercial applications

where low-power and low-voltage operation are essential. The AT24C04B/08B is

available in space-saving 8-lead PDIP, 8-lead JEDEC SOIC, 8-lead Ultra-Thin Mini-

MAP (MLP 2x3), 5-lead SOT23, 8-lead TSSOP, and 8-ball dBGA2 packages and is

accessed via a Two-wire serial interface. In addition, the AT24C04B/08B is available in

1.8V (1.8V to 5.5V) version.

Figure 1. Pin Configurations

Pin Name

Description

1

2

3

5

4

SCL

GND

SDA

WP

1

2

3

4

8

7

6

5

A0

A1

A2

GND

A0

A1

A2

GND

A0

A1

A2

GND

WP

SCL

SDA

WP

SCL

SDA

A0

A1

A2

GND

A0

A1

A2

GND

1

2

3

4

8

7

6

5

1

2

3

4

8

7

6

5

4

3

2

1

5

6

7

8

1

2

3

4

8

7

6

5

8-lead SOIC

8-ball dBGA2

8-lead Ultra-Thin

Mini-MAP (MLP 2x3)

8-lead PDIP

5-lead SOT23

Bottom View

Bottom View

8-lead TSSOP

WP

SCL

SDA

WP

SCL

SDA

WP

SCL

SDA

A0 – A2

Address Inputs

SDA

Serial Data

SCL

Serial Clock Input

WP

Write Protect

NC

No Connect

GND

Ground

V

CC

Power Supply

Note: For use of 5-lead SOT23

4K: The software A2 and A1 bits in the

device address word must be set to zero

to properly communicate.

8K: The software A2 bit in the device

address word must be set to zero to

properly communicate.

5226G–SEEPR–11/09

Two-wire

Serial EEPROM

4K (512 x 8)

8K (1024 x 8)

AT24C04B

AT24C08B

Not Recommended

for New Design.

Replaced by

AT24C04C or

AT24C08C.