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Atmel Electronic Components Datasheet



AT24C256C

2-Wire Serial EEPROM


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AT24C256C pdf
AT24C256C
I2C-Compatible (2-Wire) Serial EEPROM
256-Kbit (32,768 x 8)
DATASHEET
Features
Low-voltage and Standard-voltage Operation
̶ VCC = 1.7V to 5.5V
Internally Organized as 32,768 x 8
2-wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bidirectional Data Transfer Protocol
400kHz (1.7V) and 1MHz (2.5V, 2.7V, 5.0V) Compatibility
Write Protect Pin for Hardware Protection
64-byte Page Write Mode
̶ Partial Page Writes Allowed
Self-timed Write Cycle (5ms Max)
High Reliability
̶ Endurance: 1,000,000 Write Cycles
̶ Data Retention: 40 Years
Lead-free/Halogen-free Devices Available
Green Package Options (Pb/Halide-free/RoHS Compliant)
̶ 8-lead JEDEC SOIC, 8-lead TSSOP, 8-pad UDFN, and 8-ball VFBGA
Packages
Die Sale Options: Wafer Form, Waffle Pack, and Bumped Wafers
Description
The Atmel® 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 cascading feature allows up to eight devices to share a
common 2-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 SOIC, 8-lead
TSSOP, 8-pad UDFN, and 8-ball VFBGA packages. In addition, this device
operates from 1.7V to 5.5V.
Atmel-8568F-SEEPROM-AT24C256C-Datasheet_012015



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AT24C256C pdf
1. Pin Configurations and Pinouts
Table 1-1.
Pin
A0
A1
A2
GND
SDA
SCL
WP
VCC
Pin Configuration
Function
Address Input
Address Input
Address Input
Ground
Serial Data
Serial Clock Input
Write Protect
Device Power Supply
A0
A1
A2
GND
8-lead SOIC
18
27
36
45
Top View
VCC
WP
SCL
SDA
8-pad UDFN
A0 1
A1 2
A2 3
GND 4
8 VCC
7 WP
6 SCL
5 SDA
Top View
A0
A1
A2
GND
8-lead TSSOP
18
27
36
45
Top View
VCC
WP
SCL
SDA
8-ball VFBGA
VCC 8
WP 7
SCL 6
SDA 5
1 A0
2 A1
3 A2
4 GND
Bottom View
2. Absolute Maximum Ratings*
Operating Temperature . . . . . . . . . . .-55°C to +125°C
Storage Temperature . . . . . . . . . . . -65°C to + 150°C
Voltage on any pin
with respect to ground . . . . . . . . . . . . . . . -1.0 V +7.0V
Maximum Operating Voltage . . . . . . . . . . . . . . . 6.25V
DC Output Current . . . . . . . . . . . . . . . . . . . . . . .5.0mA
*Notice: Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent damage
to the device. This is a stress rating only and
functional operation of the device at these or any
other conditions beyond those indicated in the
operational sections of this specification are not
implied. Exposure to absolute maximum rating
conditions for extended periods may affect device
reliability.
2 AT24C256C [DATASHEET]
Atmel-8568F-SEEPROM-AT24C256C-Datasheet_012015



Part Number AT24C256C
Description 2-Wire Serial EEPROM
Maker ATMEL - ATMEL
Total Page 21 Pages
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