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24LC64T-I/SN
Microchip Technology
IC EEPROM 64KBIT I2C 8SOIC
10402 Pcs New Original In Stock
EEPROM Memory IC 64Kbit I2C 400 kHz 900 ns 8-SOIC
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5.0 / 5.0
- (124 Ratings)
24LC64T-I/SN
Product Overview
1230741
DiGi Electronics Part Number
24LC64T-I/SN-DGManufacturer
Microchip Technology
24LC64T-I/SN
Description
IC EEPROM 64KBIT I2C 8SOICInventory
10402 Pcs New Original In Stock
EEPROM Memory IC 64Kbit I2C 400 kHz 900 ns 8-SOIC
Quantity
Minimum 1
Minimum 1
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24LC64T-I/SN Technical Specifications
Category
Memory, Memory
Packaging
Cut Tape (CT) & Digi-Reel®
Series
-
Product Status
Active
DiGi-Electronics Programmable
Verified
Memory Type
Non-Volatile
Memory Format
EEPROM
Technology
EEPROM
Memory Size
64Kbit
Memory Organization
8K x 8
Memory Interface
I2C
Clock Frequency
400 kHz
Write Cycle Time - Word, Page
5ms
Access Time
900 ns
Voltage - Supply
2.5V ~ 5.5V
Operating Temperature
-40°C ~ 85°C (TA)
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Supplier Device Package
8-SOIC
Base Product Number
24LC64
Datasheet & Documents
HTML Datasheet
24LC64T-I/SN-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.32.0051
Additional Information
Other Names
24LC64T-I/SNDKR
24LC64TISN
24LC64T-I/SNCT
24LC64T-I/SNTR
24LC64T-I/SN-DG
24LC64T-I/SN-NDR
Standard Package
3,300
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Wir sind beeindruckt von der schnellen Verfügbarkeit der Bauteile und dem freundlichen Support.
Dec 02, 2025
Die Website von DiGi Electronics ist sehr benutzerfreundlich und erleichtert das Finden der gewünschten Produkte enorm.
Dec 02, 2025
コスパ良し、環境にやさしい包装も良し！また利用します。
Dec 02, 2025
Transparency in pricing builds a strong sense of trust with their customers.
Dec 02, 2025
The durability and performance of their products are truly impressive.
Dec 02, 2025
The quality of support they offer after purchase exceeds expectations.
Dec 02, 2025
I am consistently impressed with their ability to maintain high inventory levels and provide thorough support.
Dec 02, 2025
DiGi Electronics' diverse product portfolio is perfect for those seeking innovation and variety.
Dec 02, 2025
Their website’s user interface is clean and modern, enhancing the shopping experience.
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Frequently Asked Questions (FAQ)
What are the key design risks when replacing a 24LC64T-I/SN with a similar 64Kbit I2C EEPROM like the AT24C64D or M24C64-W in a 3.3V automotive application?
When substituting the 24LC64T-I/SN with alternatives like the AT24C64D or M24C64-W, verify I2C address compatibility and pull-up resistor requirements—especially under 3.3V operation. The 24LC64T-I/SN supports a wide 2.5V–5.5V range and has a fixed I2C address (controlled by A0–A2 pins), while some competitors may use different addressing schemes or stricter voltage thresholds. Additionally, confirm timing margins: although all claim 400 kHz support, actual rise/fall times on long buses can cause communication failures if pull-ups are undersized. Always validate signal integrity with an oscilloscope in your specific layout, particularly in noisy automotive environments where ground bounce or EMI could affect I2C reliability.
Can the 24LC64T-I/SN safely handle frequent small writes (e.g., logging sensor data every second) without premature wear, and how should I mitigate endurance risks?
The 24LC64T-I/SN is rated for 1 million write cycles per memory location, but writing to the same byte repeatedly—such as in a circular buffer without wear leveling—can cause localized failure. To mitigate this, implement software-based wear leveling by distributing writes across multiple addresses within the 8K x 8 space. Also, leverage its 5ms page write capability (up to 64 bytes per page) to batch updates and reduce total write operations. Avoid writing during power-up/down transients; use a supervisor IC to ensure VCC is stable above 2.5V before initiating writes. This extends effective lifespan and prevents data corruption in mission-critical logging applications.
How does the 24LC64T-I/SN behave during brownout conditions, and what design safeguards are needed to prevent partial or corrupted writes?
The 24LC64T-I/SN lacks built-in brownout protection, so if VCC drops below 2.5V during a write cycle, it may result in incomplete or corrupted data. To safeguard against this, pair it with a voltage supervisor (e.g., MCP112-250) that holds the system MCU in reset until VCC stabilizes above 2.7V. Additionally, design firmware to complete critical writes atomically—using checksums or dual-copy storage—and avoid initiating writes near expected low-power events. Since the device operates down to 2.5V, even brief dips below this threshold (common in battery-powered systems) can trigger undefined behavior, making external monitoring essential for data integrity.
Is the 24LC64T-I/SN suitable for high-temperature industrial environments where ambient temps approach 85°C, and how does temperature affect its I2C timing margins?
Yes, the 24LC64T-I/SN is rated for -40°C to +85°C operation, but at elevated temperatures, I2C signal integrity can degrade due to increased trace resistance and reduced noise margins. At 85°C, ensure pull-up resistors on SDA/SCL lines are appropriately sized (typically 2.2kΩ to 4.7kΩ for 3.3V systems) to maintain rise times within I2C Fast Mode specs (<300 ns). Longer PCB traces or high-capacitance buses exacerbate this issue. Consider using I2C buffer/repeater ICs (like PCA9515A) in extended networks. Also, note that while access time is specified as 900 ns at 25°C, it may marginally increase at temperature extremes—validate timing in your actual thermal environment during prototyping.
What layout and decoupling practices are critical when placing the 24LC64T-I/SN on a densely populated PCB with switching regulators nearby?
Place the 24LC64T-I/SN as close as possible to the host MCU’s I2C pins to minimize trace length and reduce susceptibility to EMI from nearby switching regulators. Use a 0.1 µF ceramic decoupling capacitor mounted directly across VCC and GND pins (within 2 mm if possible) to filter high-frequency noise. Route I2C signals away from power inductors, DC-DC converters, or clock lines, and avoid running them over split ground planes. Since the 24LC64T-I/SN has no separate analog ground, ensure a solid ground return path beneath the device. In high-noise environments, consider adding small series resistors (22–100 Ω) near the MCU side of SDA/SCL to dampen reflections and reduce ringing—this improves signal integrity without violating I2C timing specs.
Quality Assurance (QC)
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24LC64T-I/SN CAD Models
Microchip Technology 24LC64T-I/SN PCB symbols & footprints
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