CAT24C21 Просмотр технического описания (PDF) - ON Semiconductor
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CAT24C21 Datasheet PDF : 14 Pages
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CAT24C21
1 kb Dual Mode Serial
EEPROM for VESAt
“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
VCC
SCL
VCLK
CAT24C21
SDA
http://onsemi.com
SOIC−8
W SUFFIX
CASE 751BD
TDFN−8
ZD4 SUFFIX
CASE 511AL
MSOP−8
Z SUFFIX
CASE 846AD
PDIP−8
L SUFFIX
CASE 646AA
TSSOP−8
Y SUFFIX
CASE 948AL
PIN CONFIGURATION
NC
1
NC
VCC
VCLK
NC
SCL
VSS
SDA
PDIP (L), SOIC (W), TSSOP (Y),
TDFN (ZD4), MSOP (Z)
Pin Name
NC
SDA
SCL
VCLK
VCC
VSS
PIN FUNCTION
Function
No Connect
Serial Data / Address
Serial Clock (bi−directional mode)
Serial Clock (transmit−only mode)
Power Supply
Ground
VSS
Figure 1. Functional Symbol
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 14 of this data sheet.
© Semiconductor Components Industries, LLC, 2009
1
September, 2009 − Rev. 16
Publication Order Number:
CAT24C21/D
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