24LC256-EG 查看數據表（PDF） - Microchip Technology
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24LC256-EG Datasheet PDF : 26 Pages
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24AA256/24LC256/24FC256
256K I2C™ CMOS Serial EEPROM
Device Selection Table
Part
Number
VCC
Range
Max. Clock
Frequency
24AA256 1.8-5.5V 400 kHz(1)
24LC256
24FC256
2.5-5.5V
1.8-5.5V
400 kHz
1 MHz(2)
Note 1: 100 kHz for VCC < 2.5V.
2: 400 kHz for VCC < 2.5V.
Temp.
Ranges
I
I, E
I
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
• 2-wire serial interface bus, I2C™ compatible
• Cascadable for up to eight devices
• Self-timed erase/write cycle
• 64-byte Page Write mode available
• 5 ms max. write cycle time
• 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
• Electrostatic discharge protection > 4000V
• Data retention > 200 years
• 8-pin PDIP, SOIC, TSSOP, MSOP and DFN
packages, 14-lead TSSOP package
• Pb-free finishes available
• Temperature ranges:
- Industrial (I):
- Automotive (E):
-40°C to +85°C
-40°C to +125°C
Description:
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.
Block Diagram
A0 A1A2 WP
HV Generator
I/O
Control
Logic
Memory
Control
Logic
I/O
SCL
SDA
VCC
VSS
XDEC
EEPROM
Array
Page Latches
YDEC
Sense Amp.
R/W Control
Package Types
PDIP/SOIC
A0 1
A1 2
A2 3
VSS 4
8 VCC
7 WP
6 SCL
5 SDA
TSSOP/MSOP*
A0 1
A1 2
A2 3
VSS
4
8 VCC
7 WP
6 SCL
5 SDA
DFN
A0 1
A1 2
A2 3
VSS 4
8 VCC
7 WP
6 SCL
5 SDA
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
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