24AA256/24LC256/24FC256
256K I2C™ CMOS Serial EEPROM
Device Selection Table
Description:
Part
Number
VCC
Range
Max. Clock
Frequency
Temp.
Ranges
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 (1.8V 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 and DFN packages.
24AA256
24LC256
24FC256
1.8-5.5V
2.5-5.5V
1.8-5.5V
400 kHz(1)
400 kHz
1 MHz(2)
I
I, E
I
Note 1: 100 kHz for VCC < 2.5V.
2: 400 kHz for VCC < 2.5V.
Features:
• Low-power CMOS technology:
- Maximum write current 3 mA at 5.5V
- Maximum read current 400 μA at 5.5V
- Standby current 100 nA, typical at 5.5V
Block Diagram
• 2-wire serial interface bus, I2C™ compatible
• Cascadable for up to eight devices
• Self-timed erase/write cycle
A0 A1A2WP
HV Generator
I/O
Control
Logic
• 64-byte Page Write mode available
• 5 ms max. write cycle time
Memory
Control
Logic
EEPROM
Array
XDEC
• Hardware write-protect for entire array
• Output slope control to eliminate ground bounce
• Schmitt Trigger inputs for noise suppression
• 1,000,000 erase/write cycles
Page Latches
I/O
SCL
YDEC
SDA
• Electrostatic discharge protection > 4000V
• Data retention > 200 years
VCC
VSS
• 8-pin PDIP, SOIC, TSSOP, MSOP and DFN
packages, 14-lead TSSOP package
Sense Amp.
R/W Control
• Pb-free finishes available
• Temperature ranges:
- Industrial (I):
- Automotive (E):
-40°C to +85°C
-40°C to +125°C
Package Types
PDIP/SOIC
TSSOP/MSOP*
DFN
A0
1
8
VCC
1
2
3
4
A0
A1
8
7
6
5
VCC
WP
1
2
8
7
A0
A1
VCC
A1
A2
2
3
7
6
WP
WP
A2
SCL
SDA
SCL
3
4
6
5
A2
SCL
SDA
VSS
VSS
4
5
SDA
VSS
Note: * Pins A0 and A1 are no connects for the MSOP package only.
*24XX256 is used in this document as a generic part number for the 24AA256/24LC256/24FC256 devices.
© 2005 Microchip Technology Inc.
DS21203N-page 1