AT24C21-10SC-2.5

AT24C21-10SC-2.5 Datasheet

The AT24C21 provides 1024 bits of serial electrically erasable and programmable read only memory EEPROM organized as 128 words of 8 bits each. The device is optimized for use in applications requiring data storage and serial transmission of configuration and control information. The AT24C21 features two modes of operation Transmit-only Mode and Bidirectional Mode. Upon power-up, the AT24C21 will be in the Transmit-only Mode, sending a serial-bit stream of the entire memory contents, clocked via the VCLK pin. The Bidirectional Mode is selected by a valid high-to-low transition on the SCL pin and offers byte selectable read/write capability of the entire memory array. The AT24C21 is available in space saving 8-pin PDIP and 8-lead SOIC packages.

Part	Datasheet
AT24C21-10SC-2.5	AT24C21-10SC-2.5 (pdf)

Related Parts	Information
AT24C21-10PI-2.5	AT24C21-10PI-2.5
AT24C21-10SI-2.5	AT24C21-10SI-2.5
AT24C21-10PC-2.5	AT24C21-10PC-2.5

PDF Datasheet Preview
• 2-wire Serial Interface • Schmitt Trigger, Filtered Inputs For Noise Suppression • DDC1 / DDC2 Interface Compliant for Monitor Identification • Low-voltage Operation VCC = 2.5V to 5.5V • Internally Organized 128 x 8 • 100 kHz 2.5V Compatibility • 8-byte Page Write Mode • Write Protection Available • Self-timed Write Cycle 10 ms max • High Reliability Endurance 1 Million Write Cycles Data Retention 100 Years ESD Protection >3000V • 8-pin PDIP and JEDEC SOIC Packages The AT24C21 provides 1024 bits of serial electrically erasable and programmable read only memory EEPROM organized as 128 words of 8 bits each. The device is optimized for use in applications requiring data storage and serial transmission of configuration and control information. The AT24C21 features two modes of operation Transmit-only Mode and Bidirectional Mode. Upon power-up, the AT24C21 will be in the Transmit-only Mode, sending a serial-bit stream of the entire memory contents, clocked via the VCLK pin. The Bidirectional Mode is selected by a valid high-to-low transition on the SCL pin and offers byte selectable read/write capability of the entire memory array. The AT24C21 is available in space saving 8-pin PDIP and 8-lead SOIC packages. Pin Configurations Pin Name NC SDA SCL VCLK Function No Connect Serial Data Serial Clock Input Bidirectional Mode Serial Clock Input Transmit-only Mode 2-wire Serial EEPROM 1K 128 x 8 AT24C21 2-Wire, 1K Serial EEPROM 8-pin PDIP 8-lead SOIC NC 1 NC 2 NC 3 GNE 4 8 VCC 7 VCLK 6 SCL 5 SDA NC 1 NC 2 NC 3 GND 4 8 VCC 7 VCLK 6 SCL 5 SDA Absolute Maximum Ratings* Operating Temperature -55°C to +125°C Storage Temperature -65°C to +150°C Voltage on Any Pin with Respect to Ground to +7.0V Maximum Operating Voltage 6.25V DC Output mA Block Diagram *NOTICE: Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Pin Description SERIAL CLOCK SCL The SCL input is used to positive edge clock data into each EEPROM device and negative edge clock data out of each device. SERIAL DATA SDA The SDA pin is bidirectional for serial data transfer. This pin is open-drain driven and may be wire-ORed with any number of other open drain or open collector devices. SERIAL CLOCK VCLK Upon power-up, the device is in the Transmit-only mode and will transmit the entire memory contents via the SDA pin with positive signals on the VCLK pin. Memory Organization AT24C21, 1K SERIAL EEPROM Internally organized with 128 pages of one byte each. The 1K requires a 7-bit data word address for random word addressing. AT24C21 AT24C21 DC Characteristics Applicable over recommended operating range from TAI = -40°C to +85°C, TAC = 0°C to +70°C, VCC = +2.5V to +5.5V unless otherwise noted . Symbol Parameter Test Condition Ordering Information tWR max ms ICC max µA 3000 ISB max µA 3000 fMAX kHz 100 Ordering Code AT24C21-10PC-2.5 AT24C21-10SC-2.5 AT24C21-10PI-2.5 AT24C21-10SI-2.5 Package 8P3 8S1 8P3 8S1 Operation Range Commercial 0°C to 70°C Industrial -40°C to 85°C 8P3 8S1 Package Type 8-pin, Wide, Plastic Dual Inline Package PDIP 8-lead, Wide, Plastic Gull Wing Small Outline JEDEC SOIC Options Low Voltage 2.5V to 5.5V AT24C21 Packaging Information 8P3, 8-pin, Wide, Plastic Dual Inline Package PDIP Dimensions in Inches and Millimeters JEDEC STANDARD MS-001 BA PIN 1 SEATING PLANE AT24C21 8S1, 8-lead, Wide, Plastic Gull Wing Small Outline JEDEC SOIC Dimension in Inches and Millimeters PIN 1 Atmel Headquarters Corporate Headquarters 2325 Orchard Parkway San Jose, CA 95131 TEL 408 441-0311 FAX 408 487-2600 Europe Atmel U.K., Ltd. Coliseum Business Centre Riverside Way Camberley, Surrey GU15 3YL England TEL 44 1276-686-677 FAX 44 1276-686-697 Asia Atmel Asia, Ltd. Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimhatsui East Kowloon Hong Kong TEL 852 2721-9778 FAX 852 2722-1369 Japan Atmel Japan K.K. 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan TEL 81 3-3523-3551 FAX 81 3-3523-7581 Atmel Operations Atmel Colorado Springs 1150 E. Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TEL 719 576-3300 FAX 719 540-1759 Atmel Rousset Zone Industrielle 13106 Rousset Cedex France TEL 33 4-4253-6000 FAX 33 4-4253-6001 Fax-on-Demand North America 1- 800 292-8635 International 1- 408 441-0732 e-mail Web Site BBS 1- 408 436-4309 Atmel Corporation Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems. Marks bearing and/or are registered trademarks and trademarks of Atmel Corporation. Terms and product names in this document may be trademarks of others. Printed on recycled paper.

PDF Datasheet Preview

• 2-wire Serial Interface
• Schmitt Trigger, Filtered Inputs For Noise Suppression
• DDC1 / DDC2 Interface Compliant for Monitor Identification
• Low-voltage Operation

VCC = 2.5V to 5.5V
• Internally Organized 128 x 8
• 100 kHz 2.5V Compatibility
• 8-byte Page Write Mode
• Write Protection Available
• Self-timed Write Cycle 10 ms max
• High Reliability

Endurance 1 Million Write Cycles

Data Retention 100 Years

ESD Protection >3000V
• 8-pin PDIP and JEDEC SOIC Packages

The AT24C21 provides 1024 bits of serial electrically erasable and programmable read only memory EEPROM organized as 128 words of 8 bits each. The device is optimized for use in applications requiring data storage and serial transmission of configuration and control information. The AT24C21 features two modes of operation Transmit-only Mode and Bidirectional Mode. Upon power-up, the AT24C21 will be in the Transmit-only Mode, sending a serial-bit stream of the entire memory contents, clocked via the VCLK pin. The Bidirectional Mode is selected by a valid high-to-low transition on the SCL pin and offers byte selectable read/write capability of the entire memory array. The AT24C21 is available in space saving 8-pin PDIP and 8-lead SOIC packages.

Pin Configurations

Pin Name NC SDA SCL

VCLK

Function

No Connect

Serial Data

Serial Clock Input Bidirectional Mode

Serial Clock Input Transmit-only Mode
2-wire Serial EEPROM
1K 128 x 8

AT24C21
2-Wire, 1K Serial EEPROM
8-pin PDIP
8-lead SOIC

NC 1 NC 2 NC 3 GNE 4
8 VCC 7 VCLK 6 SCL 5 SDA

NC 1 NC 2 NC 3 GND 4
8 VCC 7 VCLK 6 SCL 5 SDA

Absolute Maximum Ratings*

Operating Temperature -55°C to +125°C Storage Temperature -65°C to +150°C Voltage on Any Pin with Respect to Ground to +7.0V Maximum Operating Voltage 6.25V DC Output mA

Block Diagram
*NOTICE:

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Pin Description

SERIAL CLOCK SCL The SCL input is used to positive edge clock data into each EEPROM device and negative edge clock data out of each device.

SERIAL DATA SDA The SDA pin is bidirectional for serial data transfer. This pin is open-drain driven and may be wire-ORed with any number of other open drain or open collector devices.

SERIAL CLOCK VCLK Upon power-up, the device is in the Transmit-only mode and will transmit the entire memory contents via the SDA pin with positive signals on the VCLK pin.

Memory Organization

AT24C21, 1K SERIAL EEPROM Internally organized with 128 pages of one byte each. The 1K requires a 7-bit data word address for random word addressing.

AT24C21

AT24C21

DC Characteristics

Applicable over recommended operating range from TAI = -40°C to +85°C, TAC = 0°C to +70°C, VCC = +2.5V to +5.5V unless otherwise noted .

Symbol Parameter

Test Condition
Ordering Information
tWR max ms

ICC max µA
3000

ISB max µA
3000
fMAX kHz 100
Ordering Code AT24C21-10PC-2.5 AT24C21-10SC-2.5 AT24C21-10PI-2.5 AT24C21-10SI-2.5

Package 8P3 8S1 8P3 8S1

Operation Range Commercial 0°C to 70°C Industrial
-40°C to 85°C
8P3 8S1

Package Type 8-pin, Wide, Plastic Dual Inline Package PDIP 8-lead, Wide, Plastic Gull Wing Small Outline JEDEC SOIC

Options Low Voltage 2.5V to 5.5V

AT24C21

Packaging Information
8P3, 8-pin, Wide, Plastic Dual Inline Package PDIP Dimensions in Inches and Millimeters

JEDEC STANDARD MS-001 BA

PIN 1

SEATING PLANE

AT24C21
8S1, 8-lead, Wide, Plastic Gull Wing Small Outline JEDEC SOIC Dimension in Inches and Millimeters

PIN 1

Atmel Headquarters

Corporate Headquarters 2325 Orchard Parkway San Jose, CA 95131 TEL 408 441-0311 FAX 408 487-2600

Europe Atmel U.K., Ltd. Coliseum Business Centre Riverside Way Camberley, Surrey GU15 3YL England TEL 44 1276-686-677 FAX 44 1276-686-697

Asia Atmel Asia, Ltd. Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimhatsui East Kowloon Hong Kong TEL 852 2721-9778 FAX 852 2722-1369

Japan Atmel Japan K.K. 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan TEL 81 3-3523-3551 FAX 81 3-3523-7581

Atmel Operations

Atmel Colorado Springs 1150 E. Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TEL 719 576-3300 FAX 719 540-1759

Atmel Rousset Zone Industrielle 13106 Rousset Cedex France TEL 33 4-4253-6000 FAX 33 4-4253-6001

Fax-on-Demand North America 1- 800 292-8635 International 1- 408 441-0732
e-mail

Web Site

BBS 1- 408 436-4309

Atmel Corporation Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems.

Marks bearing and/or are registered trademarks and trademarks of Atmel Corporation. Terms and product names in this document may be trademarks of others.

Printed on recycled paper.

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived AT24C21-10SC-2.5 Datasheet file may be downloaded here without warranties.

Datasheet ID: AT24C21-10SC-2.5 518883