Features
•
Low-voltage and Standard-voltage Operation
V
CC
= 1.7V to 5.5V
•
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 400kHz (1.7V) Compatibility
•
Write Protect Pin for Hardware and Software Data Protection
•
64-byte Page Write Mode (Partial Page Writes Allowed)
•
Self-timed Write Cycle (5ms Max)
•
High Reliability
Endurance: One Million Write Cycles
Data Retention: 40 Years
•
Lead-free/Halogen-free Devices Available
•
8-lead JEDEC SOIC, 8-lead TSSOP, 8-lead UDFN and 8-ball VFBGA Packages
•
Die Sales: Wafer Form, Waffle Pack and Bumped Wafers
Two-wire
Serial EEPROM
256K (32,768 x 8)
Atmel AT24C256C
Description
The AT24C256C provides 262,144-bits of serial electrically erasable and
programmable read-only memory (EEPROM) organized as 32,768 words of eight
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 SOIC, 8-lead TSSOP,
8-lead UDFN, and 8-ball VFBGA packages. In addition, this device operates from
1.7V to 5.5V.
Table 1.
Pin Configurations
Function
Address Inputs
Serial Data
Serial Clock Input
Write Protect
Ground
8-lead UDFN
V
CC
8
WP
7
SCL
6
SDA
5
1
A0
2
A1
3
A2
4
GND
Pin Name
A0 – A2
SDA
SCL
WP
GND
8-lead SOIC
A0
A1
A2
GND
1
2
3
4
8
7
6
5
8-lead TSSOP
V
CC
WP
SCL
SDA
A0
A1
A2
GND
1
2
3
4
8
7
6
5
V
CC
WP
SCL
SDA
8-ball VFBGA
V
CC
8
WP
7
SCL
6
SDA
5
1
2
3
4
A0
A1
A2
GND
Bottom View
Bottom View
8568C–SEEPR–5/10
ATMEL [ ATMEL CORPORATION ]
