24AA256/24LC256/24FC256
256K I2C™ CMOS Serial EEPROM
• Temperature Ranges:
Device Selection Table
- Industrial (I):
- Automotive (E):
-40C to +85C
-40C to +125C
Part
VCC
Max. Clock
Frequency
Temp.
Ranges
Number
Range
Description:
24AA256
24LC256
24FC256
1.7-5.5V
2.5-5.5V
1.7-5.5V
400 kHz(1)
400 kHz
1 MHz(2)
I, E
I, E
I
The Microchip Technology Inc. 24AA256/24LC256/
24FC256 (24XX256*) is a 32K x 8 (256 Kbit) Serial
Electrically Erasable PROM, capable of operation
across a broad voltage range (1.7V to 5.5V). It has
been developed for advanced, low-power applications
such as personal communications or data acquisition.
This device also has a page write capability of up to 64
bytes of data. This device is capable of both random
and sequential reads up to the 256K boundary.
Functional address lines allow up to eight devices on
the same bus, for up to 2 Mbit address space. This
device is available in the standard 8-pin plastic DIP,
SOIC, TSSOP, MSOP, DFN and TDFN packages. The
24AA256 is also available in the 8-lead Chip Scale
package.
Note 1: 100 kHz for VCC < 2.5V.
2: 400 kHz for VCC < 2.5V.
Features:
• Single Supply with Operation Down to 1.7V for
24AA256 and 24FC256 Devices, 2.5V for
24LC256 Devices
• Low-Power CMOS Technology:
- Active current 400 uA, typical
- Standby current 100 nA, typical
• 2-Wire Serial Interface, I2C™ Compatible
• Cascadable up to Eight Devices
• Schmitt Trigger Inputs for Noise Suppression
• Output Slope Control to Eliminate Ground Bounce
• 100 kHz and 400 kHz Clock Compatibility
• Page Write Time 5 ms Max.
Block Diagram
A0 A1A2WP
HV Generator
I/O
Control
Logic
• Self-Timed Erase/Write Cycle
Memory
Control
Logic
EEPROM
Array
XDEC
• 64-Byte Page Write Buffer
• Hardware Write-Protect
Page Latches
• ESD Protection >4000V
I/O
• More than One Million Erase/Write Cycles
• Data Retention >200 years
SCL
YDEC
SDA
• Factory Programming Available
• Packages Include 8-lead PDIP, SOIC, DFN,
TDFN, TSSOP and MSOP
VCC
Sense Amp.
R/W Control
VSS
• Pb-Free and RoHS Compliant
Package Types
TSSOP/MSOP(1)
DFN/TDFN
CS (Chip Scale)(2)
VCC A1 A0
PDIP/SOIC
A0
1
8
VCC
1
2
3
4
A0
A1
8
7
6
5
VCC
WP
1
2
8
7
A0
A1
VCC
WP
1
2
3
A1
A2
2
3
4
7
6
5
WP
4
5
WP
A2
A2
SCL
SDA
8
6
7
SCL
SDA
3
4
6
5
A2
SCL
SDA
SDA SCL VSS
VSS
VSS
VSS
(TOP DOWN VIEW,
BALLS NOT VISIBLE)
Note 1: * Pins A0 and A1 are no connects for the MSOP package only.
Note 2: Available in I-temp, “AA” only.
*24XX256 is used in this document as a generic part number for the 24AA256/24LC256/24FC256 devices.
1998-2013 Microchip Technology Inc.
DS20001203T-page 1