AT24C256 EEPROMs Datasheet

AT24C256 Datasheet, PDF, Equivalent


Part Number

AT24C256

Description

2-Wire Serial EEPROMs

Manufacture

ATMEL Corporation

Total Page 23 Pages
Datasheet
Download AT24C256 Datasheet


AT24C256
Features
Low-voltage and Standard-voltage Operation
– 2.7 (VCC = 2.7V to 5.5V)
– 1.8 (VCC = 1.8V to 3.6V)
Internally Organized 16,384 x 8 and 32,768 x 8
Two-wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bidirectional Data Transfer Protocol
1 MHz (5V), 400 kHz (2.7V, 2.5V) and 100 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
Extended Temperature and Lead-free/Halogen-free
Devices Available
8-lead JEDEC PDIP, 8-lead JEDEC and EIAJ SOIC, 8-lead MAP, 8-lead TSSOP, 8-lead
SAP and 8-ball dBGA2 Packages
Die Sales: Wafer Form, Waffle Pack, and Bumped Wafers
Two-wire Serial
EEPROMs
128K (16,384 x 8)
256K (32,768 x 8)
Description
The AT24C128/256 provides 131,072/262,144 bits of serial electrically erasable and
programmable read only memory (EEPROM) organized as 16,384/32,768 words of 8
bits each. The device’s cascadable feature allows up to 4 devices to share a common
Two-wire bus. The device is optimized for use in many industrial and commercial appli-
cations 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 EIAJ
SOIC, 8-lead MAP (24C128), 8-lead TSSOP, 8-lead SOIC Array Package and 8-ball
dBGA2 packages. In addition, the entire family is available in 2.7V (2.7V to 5.5V) and
1.8V (1.8V to 3.6V) versions.
Table 1. Pin Configuration
8-lead PDIP
8-lead TSSOP
Pin Name
A0 - A1
SDA
Function
Address Inputs
Serial Data
A0
A1
NC
GND
1
2
3
4
8 VCC
7 WP
6 SCL
5 SDA
A0
A1
NC
GND
1
2
3
4
8 VCC
7 WP
6 SCL
5 SDA
SCL
WP
NC
GND
Serial Clock Input
Write Protect
No Connect
Ground
8-lead SOIC
8-lead MAP
A0
A1
NC
GND
1
2
3
4
VCC 8
8 VCC WP 7
7 WP SCL 6
6 SCL SDA 5
5 SDA
1 A0
2 A1
3 NC
4 GND
8-ball dBGA2
VCC
WP
SCL
SDA
8
7
6
5
1 A0
2 A1
3 NC
4 GND
Bottom View
Bottom View
8-lead SAP
VCC 8
WP 7
SCL 6
SDA 5
1 A0
2 A1
3 NC
4 GND
Bottom View
AT24C128(1)
AT24C256(2)
Notes:
1. Not recommended for
new design; please
refer to AT24C128B
datasheet.
2. Not recommended for
new design; please
refer to AT24C256B
datasheet.
0670T–SEEPR–3/07
1

AT24C256
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 .................................... –1.0V to +7.0V
Maximum Operating Voltage .......................................... 6.25V
DC Output Current........................................................ 5.0 mA
Figure 1. Block Diagram
*NOTICE:
Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent dam-
age 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 is not
implied. Exposure to absolute maximum rating
conditions for extended periods may affect device
reliability.
2 AT24C128/256
0670T–SEEPR–3/07


Features Features • Low-voltage and Standard-vo ltage Operation – 2.7 (VCC = 2.7V to 5.5V) – 1.8 (VCC = 1.8V to 3.6V) • Internally Organized 16,384 x 8 and 32, 768 x 8 • Two-wire Serial Interface Schmitt Trigger, Filtered Inputs for Noise Suppression • Bidirectional Da ta Transfer Protocol • 1 MHz (5V), 40 0 kHz (2.7V, 2.5V) and 100 kHz (1.8V) C ompatibility • Write Protect Pin for Hardware and Software Data Protection 64-byte Page Write Mode (Partial Pag e Writes Allowed) • Self-timed Write Cycle (5 ms Max) • High Reliability Endurance: One Million Write Cycles – Data Retention: 40 Years • Extend ed Temperature and Lead-free/Halogen-fr ee Devices Available • 8-lead JEDEC P DIP, 8-lead JEDEC and EIAJ SOIC, 8-lead MAP, 8-lead TSSOP, 8-lead SAP and 8-ba ll dBGA2 Packages • Die Sales: Wafer Form, Waffle Pack, and Bumped Wafers T wo-wire Serial EEPROMs 128K (16,384 x 8 ) 256K (32,768 x 8) Description The A T24C128/256 provides 131,072/262,144 bits of serial electrically erasable and programmable read .
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