AT24C256C(2008) Ver la hoja de datos (PDF) - Atmel Corporation

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AT24C256C
(Rev.:2008)

Two-wire Serial EEPROM 256K (32,768 x 8)

Atmel Corporation 

Features

• Low-voltage and Standard-voltage Operation

⎯ 1.8 (V = 1.8V to 5.5V)

CC

• Internally Organized as 32,768 x 8

• Two-wire Serial Interface

• Schmitt Trigger, Filtered Inputs for Noise Suppression

• Bidirectional Data Transfer Protocol

• 1 MHz (5.0V, 2.7V, 2.5V), and 400 kHz (1.8V) Compatibility

• Write Protect Pin for Hardware and Software Data Protection

• 64-byte Page Write Mode (Partial Page Writes Allowed)

• Self-timed Write Cycle (5 ms Max)

• High Reliability

⎯ Endurance: One Million Write Cycles

⎯ Data Retention: 40 Years

• Lead-free/Halogen-free Devices Available

• 8-lead JEDEC PDIP, 8-lead JEDEC SOIC, EIAJ SOIC, 8-lead Ultra Thin Small

Array Package (SAP), 8-lead TSSOP, and 8-ball dBGA2 Packages

• Die Sales: Wafer Form, Waffle Pack and Bumped Wafers

Description

The AT24C256C provides 262,144 bits of serial electrically erasable and

programmable read-only memory (EEPROM) organized as 32,768 words of 8 bits

each. The device’s cascadable feature allows up to eight devices to share a common

two-wire bus. The device is optimized for use in many industrial and commercial

applications where low-power and low-voltage operation are essential. The devices

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

Thin SAP, 8-lead TSSOP, and 8-ball dBGA2 packages. In addition, the entire family is

available in a 1.8V (1.8V to 5.5V) version.

Table 1. Pin Configurations

Pin Name

A0 – A2

SDA

SCL

Function

Address Inputs

Serial Data

Serial Clock Input

WP

Write Protect

GND

Ground

8-lead PDIP

A0 1

A1 2

8 VCC

7 WP

A2 3

6 SCL

GND 4

5 SDA

A0

A1

A2

GND

8-lead SOIC

1

8

2

7

3

6

4

5

VCC

WP

SCL

SDA

8-ball dBGA2

VCC 8

WP 7

1 A0

2 A1

SCL 6 3 A2

SDA 5 4 GND

Bottom View

8-lead TSSOP

A0 1

A1 2

8 VCC

7 WP

A2 3

6 SCL

GND 4

5 SDA

8-lead Ultra-Thin SAP

VCC 8

1 A0

WP 7 2 A1

SCL 6 3 A2

SDA 5 4 GND

Bottom View

Two-wire

Serial EEPROM

256K (32,768 x 8)

AT24C256C

8568A–SEEPR–11/08

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