24LC21AT/SN
- Mfr.Part #
- 24LC21AT/SN
- Manufacturer
- Microchip Technology
- Package / Case
- 8-SOIC (0.154, 3.90mm Width)
- Datasheet
- Download
- Description
- IC EEPROM 1KBIT I2C 400KHZ 8SOIC
- Stock
- 3,292
- In Stock :
- 3,292
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- Manufacturer :
- Microchip Technology
- Product Category :
- Memory
- Supply Current :
- 3(mA)
- Operating Supply Voltage (Max) :
- 5.5(V)
- Pbfree Code :
- yes
- Operating Supply Voltage :
- 2.5 V to 5.5 V
- Serial Bus Type :
- I2C
- Series :
- --
- Programmable :
- yes
- Standby Current-Max :
- 0.00003A
- Qualification Status :
- Not Qualified
- JESD-609 Code :
- e3
- Published :
- 2005
- Factory Lead Time :
- 6 Weeks
- JESD-30 Code :
- R-PDSO-G8
- Operating Supply Voltage (Min) :
- 2.5(V)
- Product Type :
- EEPROM
- Write Protection :
- yes
- Subcategory :
- Memory and Data Storage
- Reach Compliance Code :
- Compliant
- Package Shape :
- RECTANGULAR
- Brand :
- Microchip Technology
- Operating Supply Current :
- 1 mA
- Terminal Finish :
- Matte Tin (Sn)
- Supplier Device Package :
- 8-SOIC
- Package Type :
- SOIC N
- Number of Terminations :
- 8
- Supply Voltage-Max (Vsup) :
- 5.5V
- Temperature Grade :
- COMMERCIAL
- RoHS :
- Details
- Height Seated (Max) :
- 1.75mm
- Base Product Number :
- 24LC21
- Write Cycle Time-Max (tWC) :
- 10ms
- Operating Temperature :
- 0°C~70°C TA
- Mount :
- Surface Mount
- Supply Voltage :
- 3V
- Surface Mount :
- yes
- Product Category :
- EEPROM
- Programming Voltage :
- 2.5 TO 5.5
- ECCN Code :
- EAR99
- Package :
- Tape and Reel (TR);Cut Tape (CT);Digi-Reel®;
- Length :
- 4.9mm
- Access Time :
- 900ns
- RoHS Status :
- ROHS3 Compliant
- Endurance :
- 1000000 Write/Erase Cycles
- Organization :
- 128X8
- Memory Density :
- 1024 bit
- Operating Temperature (Max) :
- 70C
- Base Part Number :
- 24LC21A
- Density :
- 1 kb
- Number of Pins :
- 8
- Terminal Position :
- Dual
- Terminal Pitch :
- 1.27mm
- Moisture Sensitivity Level (MSL) :
- 1 (Unlimited)
- Radiation Hardening :
- No
- Voltage - Supply :
- 2.5V~5.5V
- Data Retention Time-Min :
- 200
- Data Retention :
- 200
- Minimum Operating Temperature :
- 0 C
- Memory IC Type :
- EEPROM
- Number of Functions :
- 1
- Access Time (Max) :
- 900(ns)
- Operating Temperature (Min) :
- 0C
- Terminal Form :
- Gull wing
- Power Supplies :
- 3/5V
- Operating Mode :
- SYNCHRONOUS
- Parallel/Serial :
- Serial
- Packaging :
- Tape and Reel (TR)
- Memory Interface :
- I2C
- Mounting Type :
- Surface Mount
- Interface :
- I2C, Serial
- I2C Control Byte :
- 1010000R
- Write Cycle Time - Word, Page :
- 10ms
- Manufacturer :
- Microchip
- Frequency :
- 0.4(MHz)
- Width :
- 3.9mm
- Number of Words :
- 128 words
- Memory Organization :
- 128 x 8
- Time@Peak Reflow Temperature-Max (s) :
- 40
- Supply Current-Max :
- 0.003 mA
- Memory Width :
- 8
- Height :
- 1.25 mm (Min)
- Memory Type :
- Non-Volatile
- Mounting Style :
- SMD/SMT
- Number of Terminals :
- 8
- Product Status :
- Active
- Output Characteristics :
- OPEN-DRAIN
- Operating Temperature Classification :
- COMMERCIAL
- Mounting :
- Surface Mount
- Operating Supply Voltage (Typ) :
- 3.3/5(V)
- Operating Temp Range :
- 0C to 70C
- Clock Frequency :
- 400kHz
- Peak Reflow Temperature (Cel) :
- 260
- HTS Code :
- 8542.32.00.51
- Package / Case :
- 8-SOIC (0.154, 3.90mm Width)
- Memory Size :
- 1Kb 128 x 8
- Memory Format :
- EEPROM
- Nominal Supply Current :
- 3mA
- Pin Count :
- 8
- Interface Type :
- Serial (I2C)
- Maximum Operating Temperature :
- + 70 C
- Supply Voltage-Min (Vsup) :
- 2.5V
- Contact Plating :
- Tin
- Lead Free :
- Lead Free
- Rad Hardened :
- No
- Seated Height-Max :
- 1.75 mm
- Datasheets
- 24LC21AT/SN
24LC21AT/SN Documents

Memory Microchip Technology 24LC21AT/SN Overview
The Memory Microchip Technology 24LC21AT/SN is a state-of-the-art EEPROM IC designed for high reliability and efficiency. Crafted by the renowned Microchip Technology, this EEPROM offers a compact solution with a 1 Kbit storage capacity, ideal for applications requiring small data buffers. Its I2C interface facilitates simple and fast data transfer at speeds up to 400 kHz, making it highly suitable for modern electronic systems where space and power consumption are critical considerations. The small footprint of the 8SOIC package also ensures ease of integration into existing designs, enhancing system stability and data integrity.
24LC21AT/SN Features
The 24LC21AT/SN EEPROM includes several key features that make it highly adaptable and efficient for a wide range of uses:
- 1 Kbit of memory capacity, ideal for storing configuration settings and other small data requirements.
- I2C serial interface, ensuring compatibility with most microcontrollers and facilitating easy integration.
- Operation at a frequency of up to 400 kHz, allowing for quick data access and programming.
- Low-voltage operation, which helps to minimize power consumption and extend battery life in portable devices.
- Durable 8SOIC packaging, providing robust protection against physical and environmental factors.
24LC21AT/SN Applications
- Consumer Electronics: Used in TVs, home audio systems, and other consumer electronics for storing user settings and preferences. This allows devices to "remember" user configurations between power cycles.
- Medical Devices: Implements in portable medical monitoring devices, ensuring calibration data and device settings are retained securely and accurately.
- Industrial Automation: Provides memory solutions for small-scale automation controllers and sensors, facilitating complex machine-to-machine communication with reliable data storage.
- Automotive Applications: Integrates into automotive systems for storing non-volatile data essential for operation, such as user settings and fault codes.
- Telecommunication Equipment: Utilized in network devices like routers and switches for storing firmware settings and operational parameters to ensure network reliability and performance.
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