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CAT24C21ZI Datasheet(PDF) 1 Page - ON Semiconductor

No. de pieza CAT24C21ZI
Descripción Electrónicos  1 kb Dual Mode Serial EEPROM for VESA Plug-and-Play
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Fabricante Electrónico  ONSEMI [ON Semiconductor]
Página de inicio  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

CAT24C21ZI Datasheet(HTML) 1 Page - ON Semiconductor

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© Semiconductor Components Industries, LLC, 2009
September, 2009 − Rev. 16
1
Publication Order Number:
CAT24C21/D
CAT24C21
1 kb Dual Mode Serial
EEPROM for VESA
t
“Plug-and-Play”
Description
The CAT24C21 is a 1 kb Serial CMOS EEPROM internally
organized as 128 words of 8 bits each. The device complies with the
Video Electronics Standard Association’s (VESA
™), Display Data
Channel (DDC
™) standards for “Plug−and−Play” monitors. The
“transmit−only” mode (DDC1
™) is controlled by the VCLK clock
input and the “bi−directional” mode (DDC2
™) is controlled by the
SCL clock input, with both modes sharing a common SDA
input/output (I/O). The transmit−only mode is a read−only mode,
while the bi−directional mode is a read and write mode following the
I2C protocol. In write mode the CAT24C21 features a 16−byte page
write buffer. The device is available in 8−lead DIP, SOIC, TSSOP,
MSOP and TDFN packages.
Features
DDC1t/DDC2t Interface Compliant for Monitor Identification
400 kHz I2C Bus Compatible
2.5 to 5.5 Volt Operation
16−byte Page Write Buffer
Hardware Write Protect
Low Power CMOS Technology
1,000,000 Program/Erase Cycles
100 Year Data Retention
Industrial Temperature Range
8−lead DIP, SOIC, TSSOP, MSOP or TDFN Packages
This Device is Pb−Free, Halogen Free/BFR Free, and RoHS
Compliant
Figure 1. Functional Symbol
SDA
SCL
VCLK
CAT24C21
VCC
VSS
http://onsemi.com
PIN CONFIGURATION
SDA
VCLK
VCC
VSS
NC
NC
NC
1
See detailed ordering and shipping information in the package
dimensions section on page 14 of this data sheet.
ORDERING INFORMATION
SOIC−8
W SUFFIX
CASE 751BD
MSOP−8
Z SUFFIX
CASE 846AD
SCL
PDIP (L), SOIC (W), TSSOP (Y),
TDFN (ZD4), MSOP (Z)
PDIP−8
L SUFFIX
CASE 646AA
TSSOP−8
Y SUFFIX
CASE 948AL
No Connect
NC
Serial Data / Address
SDA
Serial Clock (bi−directional mode)
SCL
Serial Clock (transmit−only mode)
VCLK
Power Supply
VCC
Ground
VSS
Function
Pin Name
PIN FUNCTION
TDFN−8
ZD4 SUFFIX
CASE 511AL


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