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24AA64T-I/MC
Microchip Technology
IC EEPROM 64KBIT I2C 400KHZ 8DFN
2512 Pcs New Original In Stock
EEPROM Memory IC 64Kbit I2C 400 kHz 900 ns 8-DFN (2x3)
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5.0 / 5.0
- (250 Ratings)
24AA64T-I/MC
Product Overview
1229973
DiGi Electronics Part Number
24AA64T-I/MC-DGManufacturer
Microchip Technology
24AA64T-I/MC
Description
IC EEPROM 64KBIT I2C 400KHZ 8DFNInventory
2512 Pcs New Original In Stock
EEPROM Memory IC 64Kbit I2C 400 kHz 900 ns 8-DFN (2x3)
Quantity
Minimum 1
Minimum 1
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24AA64T-I/MC 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
1.7V ~ 5.5V
Operating Temperature
-40°C ~ 85°C (TA)
Mounting Type
Surface Mount
Package / Case
8-VFDFN Exposed Pad
Supplier Device Package
8-DFN (2x3)
Base Product Number
24AA64
Datasheet & Documents
HTML Datasheet
24AA64T-I/MC-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
24AA64T-I/MCCT
24AA64TIMC
24AA64T-I/MCTR
24AA64T-I/MCDKR
Standard Package
3,300
Alternative Parts
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MANUFACTURER
QUANTITY AVAILABLE
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UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
грудня 02, 2025
Hochwertige Verpackung und exakte Logistikverfolgung – entspricht meinen Erwartungen.
грудня 02, 2025
They provide excellent customer satisfaction through quality and value.
грудня 02, 2025
The care put into their packaging demonstrates their customer-first approach.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the 24AA64T-I/MC in a mixed-voltage system operating at 3.3V and 5V logic levels?
The 24AA64T-I/MC supports a wide supply voltage range (1.7V to 5.5V), making it suitable for both 3.3V and 5V systems. However, a critical design-in risk is ensuring signal level compatibility with I2C bus partners. If the 24AA64T-I/MC is powered at 3.3V but connected to a 5V microcontroller, the GPIO pins are not 5V tolerant, risking damage or unreliable communication. Use I2C level translators like the PCA9306 or NXP TXB0108 to safely bridge voltage domains. Also verify pull-up resistor values on SDA and SCL lines—too low a resistance can exceed the pin current limits, especially at higher voltages. Designers should simulate bus loading and account for capacitance to maintain signal integrity across the 400 kHz I2C interface in mixed-signal environments.
How does the 24AA64T-I/MC compare to the M24C64-DFMC6TG in terms of reliability and long-term availability for industrial designs?
The 24AA64T-I/MC from Microchip and the M24C64-DFMC6TG from STMicroelectronics both offer 64Kbit I2C EEPROMs in small DFN packages, but there are key reliability and sourcing differences. The 24AA64T-I/MC has a moisture sensitivity level (MSL) of 1 (unlimited floor life), which simplifies assembly and rework—critical for high-reliability industrial designs. ST’s M24C64-DFMC6TG is MSL2, requiring controlled storage and baking if exposed. Microchip also tends to have longer product lifecycle support compared to some alternatives. For designs targeting deployment over 10+ years, the 24AA64T-I/MC offers stronger long-term availability due to Microchip’s stable supply chain and broader second-source flexibility, especially where obsolescence risk is a concern.
Can the 24AA64T-I/MC be used as a direct drop-in replacement for the 24FC64-I/MC, and what are the potential pitfalls?
While the 24AA64T-I/MC and 24FC64-I/MC are both 64Kbit I2C EEPROMs in 8-DFN packages and share pin-to-pin compatibility, they differ in write timing and endurance. The 24AA64T-I/MC has a typical write cycle time of 5ms and 1 million write cycles, while the 24FC64-I/MC supports faster byte writes and up to 10 million endurance cycles. Replacing the 24FC64 with the 24AA64T-I/MC may introduce timing risks if the host microcontroller does not poll for acknowledgment after a write (ACK polling). Additionally, systems relying on frequent small writes may experience premature wear if not adjusted. Always update the write-delay routine in firmware and evaluate wear-leveling if the 24AA64T-I/MC is used in high-write applications originally designed for the 24FC64-I/MC.
What thermal considerations should be addressed when placing the 8-DFN (2x3) 24AA64T-I/MC in a dense PCB layout?
The 8-DFN (2x3) package of the 24AA64T-I/MC has an exposed thermal pad requiring proper PCB copper land design for thermal dissipation and mechanical stability. In dense layouts, insufficient copper around the thermal pad can lead to poor solder joints and localized overheating during write cycles, despite low power consumption. To mitigate this, ensure the PCB footprint includes an adequate thermal relief connected to a ground plane, following Microchip’s recommended land pattern. Avoid placing the 24AA64T-I/MC under large ICs or heat-generating components. Also ensure reflow profile complies with the MSL1 rating to avoid 'tombstoning' or voiding—use balanced thermal pads and precise stencil aperture design (typically 0.24mm thickness with 75% area coverage on the thermal pad).
What are the failure modes of the 24AA64T-I/MC under repeated write cycles, and how can design practices extend its lifespan?
The 24AA64T-I/MC is rated for 1 million write/erase cycles, but failure typically occurs due to EEPROM cell oxide degradation from frequent writes without proper management. Critical failure modes include bit errors, corruption during power-down, and reduced data retention. To extend lifespan, minimize unnecessary writes by buffering changes in volatile memory and using write coalescing. Implement wear-leveling logic for data structures that update often (e.g., counters or logs). Always ensure stable power during write operations—use a brown-out detection circuit or small backup capacitor to prevent mid-write failures. Also, leverage the device’s 900 ns access time and ACK polling to confirm write completion, reducing retry attempts. These practices ensure robust operation in long-life applications such as medical devices or industrial sensors.
Quality Assurance (QC)
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24AA64T-I/MC CAD Models
Microchip Technology 24AA64T-I/MC PCB symbols & footprints
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