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CAT24C128
128-Kb I2C Serial CMOS EEPROM
CAT24C128
128 kb I2 C CMOS Serial
EEPROM
Description
The CAT24C128 is a 128 kb Serial CMOS EEPROM, internally
organized as 16,384 words of 8 bits each.
It features a 64ïbyte page write buffer and supports both the
Standard (100 kHz), Fast (400 kHz) and FastïPlus (1 MHz) I2C
protocol.
Write operations can be inhibited by taking the WP pin High (this
protects the entire memory).
OnïChip ECC (Error Correction Code) makes the device suitable
for high reliability applications.*
Features Supports Standard, Fast and FastïPlus I2 C Protocol 1.8 V to 5.5 V Supply Voltage Range 64ïByte Page Write Buffer Hardware Write Protection for Entire Memory Schmitt Triggers and Noise Suppression Filters on I2 C Bus Inputs
(SCL and SDA) Low Power CMOS Technology 1,000,000 Program/Erase Cycles 100 Year Data Retention Industrial and Extended Temperature Range 8ïlead PDIP, SOIC, TSSOP, MSOP and UDFN Packages This Device is PbïFree, Halogen Free/BFR Free and RoHS
Compliant**
Figure 1. Functional Symbol
SDA
SCL
CAT24C128
VCC
VSS
A2, A1, A0
*Available for New Product (Rev. C)
** For additional information on our PbïFree strategy and soldering details,
please download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
http://
PIN CONFIGURATION
SDA
VCC
VSS 1
ORDERING INFORMATION
SOICï8
W SUFFIX
CASE 751BD
SCL
PDIP (L), SOIC (W), TSSOP (Y), MSOP
(Z), UDFN (HU3***), UDFN (HU4)
PDIPï8
L SUFFIX
CASE 646AA
UDFNï8***
HU3 SUFFIX
CASE 517AX
TSSOPï8
Y SUFFIX
CASE 948AL
Device Address InputsA0, A1, A2
Serial Data Input/OutputSDA
Serial Clock InputSCL
Write Protect InputWP
Power SupplyVCC
GroundVSS
FunctionPin Name
PIN FUNCTION
For the location of Pin 1, please consult the
corresponding package drawing.
MSOPï8
Z SUFFIX
CASE 846AD
UDFNï8
HU4 SUFFIX
CASE 517AZ
*** Not recommended for new design.
The exposed pad for the TDFN/UDFN packages can
be left floating or connected to Ground.
