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CAT34C02
I2C EEPROM for DDR2 DIMM Serial Presence Detect
CAT34C02
2 kb I2 C EEPROM for DDR2
DIMM Serial Presence
Detect
Description
The CA T34C02 is a 2 kb Serial CMOS EEPROM, internally
organized as 16 pages of 16 bytes each, for a total of 256 bytes of 8 bits
each.
It features a 16ïbyte page write buffer and supports both the
Standard (100 kHz) as well as Fast (400 kHz) I2 C protocol.
Write operations can be inhibited by taking the WP pin High (this
protects the entire memory) or by setting an internal Write Protect flag
via Software command (this protects the lower half of the memory).
In addition to Permanent Software Write Protection, the
CAT34C02 also features JEDEC compatible Reversible Software
Write Protection for DDR2 Serial Presence Detect (SPD)
applications operating over the 1.7 V to 3.6 V supply voltage range.
The CAT34C02 is fully backwards compatible with earlier
DDR1 SPD applications operating over the 1.7 V to 5.5 V supply
voltage range.
Features Supports Standard and Fast I2 C Protocol 1.7 V to 5.5 V Supply Voltage Range 16ïByte Page Write Buffer Hardware Write Protection for Entire Memory Software Write Protection for Lower 128 Bytes 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 Temperature Range This Device is PbïFree, Halogen Free/BFR Free and RoHS
Compliant*
Figure 1. Functional Symbol
SDA
SCL
CAT34C02
VCC
VSS
A2, A1, A0
*For additional information on our PbïFree strategy and soldering details, please
http://
PIN CONFIGURATION
SDA
VCC
VSS 1
See detailed ordering and shipping information in the package
dimensions section on page 14 of this data sheet.
ORDERING INFORMATION
SCL
TSSOP (Y), TDFN (VP2),
UDFN (HU3), UDFN (HU4)
UDFNï8
HU3 SUFFIX
CASE 517AX
TSSOPï8
Y SUFFIX
CASE 948AL
Device Address InputA0, 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.
TDFNï8
VP2 SUFFIX
CASE 511AK
UDFNï8 EP
HU4 SUFFIX
CASE 517AZ
