Two-Wire Serial EEPROM
Description
Serial EEPROM
K24C128 / K24C256
Spring 2008
K24C128/K24C256
Two-Wire Serial EEPROM 128K (16,384 X 8)/256K (32,768 X 8)
Features
Low-voltage Operation
- 1.
8 (VCC = 1.
8V to 5.
5V)
Operating Ambient Temperature: -40°C to +85°C Internally Organized:
- 16,384 X 8 (128K)
- 32,768 X 8 (256K)
Two-wire Serial Interface Schmitt Trigger, Filtered Inputs for Noise Suppression Bidirectional Data Transfer Protocol
400 kHz (1.
8V, 2.
7V, 5V) Compatibility Write Protect Pin for Hardware Data Protection 64-byte Page (128K/256K) Write Modes Partial Page Writes Allowed Self-timed Write Cycle (5 ms max) High-reliability
- Endurance: 1 Million Write Cycles
- Data Retention: 100 Years
8-lead PDIP, 8-lead JEDEC SOIC and 8-lead
TSSOP Packages
General Description
The K24C128/K24C256 provides 131,072/262,144 bits of serial electrically erasable and programmable read-only memory (EEPROM) organized as16,384/32,768 words of 8 bits each.
The device is optimized for use in many industrial and commercial applications where low-power and low-voltage operation are essential.
The K24C128/K24C256 is available in space-saving 8-lead PDIP, 8-lead JEDEC SOIC, and 8-lead TSSOP packages and is accessed via a Two-wire serial interface.
In addition, the K24C128/K24C256 is available in 1.
8V (1.
8V to 5.
5V) version.
Pin Configuration
8-lead PDIP
A0 A1 NC GND
1 2 3 4
8 VCC 7 WP 6 SCL 5 SDA
8-lead TSSOP
A0 A1 NC GND
1 2 3 4
8 VCC 7 WP 6 SCL 5 SDA
8-lead SOI C
A0 A1 NC GND
1 2 3 4
8 VCC 7 WP 6 SCL 5 SDA
Pin Descriptions
Table 1: Pin Configuration
Pin Designation A0 - A1 SDA SCL WP GND VCC
Type I
I/O & Open-drain I I P P
Name and Functions Address Inputs Serial Data
Serial Clock Input Write Protect Ground Power Supply
Spring 2008
V1.
1 .
001.
Block Diagram
K24C128/K24C256
Two-Wire Serial EEPROM 128K (16,384 X 8)/256K (32,768 X 8)
VCC GND
WP SCL SDA
A0 A1
START STOP LOGIC
LOAD
SERIAL CONTROL LOGIC
EN
COMP
DEVICE ADDRESS COMPARATOR
LOAD
INC
R /W
DATA WORD ADDRESS COUNTER
H.
V.
...
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