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24LC64-I/ST
Microchip Technology
IC EEPROM 64KBIT I2C 8TSSOP
3295 Pcs New Original In Stock
EEPROM Memory IC 64Kbit I2C 400 kHz 900 ns 8-TSSOP
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5.0 / 5.0
- (500 Ratings)
24LC64-I/ST
Product Overview
1229959
DiGi Electronics Part Number
24LC64-I/ST-DGManufacturer
Microchip Technology
24LC64-I/ST
Description
IC EEPROM 64KBIT I2C 8TSSOPInventory
3295 Pcs New Original In Stock
EEPROM Memory IC 64Kbit I2C 400 kHz 900 ns 8-TSSOP
Quantity
Minimum 1
Minimum 1
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24LC64-I/ST Technical Specifications
Category
Memory, Memory
Packaging
Tube
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-TSSOP (0.173", 4.40mm Width)
Supplier Device Package
8-TSSOP
Base Product Number
24LC64
Datasheet & Documents
HTML Datasheet
24LC64-I/ST-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
24LC64-I/STG-DG
24LC64-I/ST-NDR
24LC64I/ST
24LC64IST
24LC64-I/STG
Standard Package
100
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
価格が明確で、公平な取引を実現している点が素晴らしいです。
de desembre 02, 2025
The value I get from DiGi Electronics' services is exceptional.
de desembre 02, 2025
Fast and reliable shipping made me confident in shopping here again.
de desembre 02, 2025
My experience with DiGi Electronics has been nothing but positive—great products and friendly service.
de desembre 02, 2025
Reliable after-sales support keeps me coming back as a customer.
de desembre 02, 2025
Their after-sales assistance truly enhances the overall customer experience.
de desembre 02, 2025
Their fast response to post-purchase concerns demonstrates their commitment to customer satisfaction.
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Frequently Asked Questions (FAQ)
Can I replace the 24LC64-I/ST with a 24AA64-I/ST in an existing 3.3V I2C design without firmware or hardware changes?
Yes, the 24AA64-I/ST is generally a drop-in replacement for the 24LC64-I/ST in 3.3V systems, as both share identical pinouts, memory organization (8K x 8), I2C interface, and timing characteristics. However, note that the 24AA64-I/ST has a lower minimum operating voltage (1.7V vs. 2.5V), which improves noise margin in 3.3V designs but doesn’t affect compatibility. Ensure your system doesn’t rely on the slightly faster write cycle of the 24AA64 (3ms typical vs. 5ms for 24LC64-I/ST); if your firmware already waits ≥5ms after writes, no update is needed. Always verify I2C address mapping and pull-up resistor values remain appropriate.
What are the risks of using the 24LC64-I/ST in a high-vibration automotive environment near its -40°C to 85°C operating limit?
While the 24LC64-I/ST is rated for -40°C to 85°C, prolonged exposure to temperature cycling and vibration—common in under-hood automotive applications—can degrade solder joints on the 8-TSSOP package over time. The MSL 1 rating means no moisture-related failures, but mechanical stress may cause intermittent I2C communication. Mitigate risk by using underfill epoxy, ensuring proper PCB stiffening, and avoiding placement near heat sources or resonant structures. For mission-critical automotive systems, consider automotive-grade alternatives like the AEC-Q100 qualified 24LC64T-I/SN (SOIC package offers better mechanical robustness).
How does the 5ms page write time of the 24LC64-I/ST impact real-time data logging in a battery-powered sensor node?
The 5ms write cycle time of the 24LC64-I/ST introduces a critical latency bottleneck during page writes, during which the I2C bus is blocked and the MCU cannot perform other tasks. In battery-powered sensor nodes, this delays sleep mode entry, increasing average current consumption. To minimize impact, buffer data in RAM and batch writes during low-activity periods, or use a dual-bank logging strategy. Alternatively, consider faster EEPROMs like the M95M04-DR (STMicroelectronics), which offers 5ms for full-page writes but with lower active current, or switch to FRAM (e.g., FM24C64B) for µs-level writes and near-zero write current—though at higher cost.
Can I safely connect multiple 24LC64-I/ST devices to the same I2C bus if they all have the same base address?
No—the 24LC64-I/ST has a fixed I2C base address (1010xxx), with only three address pins (A2, A1, A0) allowing up to eight devices on the same bus. If your design connects multiple units without configuring these pins uniquely, they will respond to the same address, causing bus contention and data corruption. Always hardwire A2/A1/A0 to VCC or GND to assign unique addresses (e.g., 000 to 111). For systems requiring more than 64Kbit, consider cascading or switching to a larger EEPROM like the 24LC128-I/SN (128Kbit, same interface) to avoid address management complexity.
Is it safe to hot-swap or hot-plug a board containing the 24LC64-I/ST while the I2C bus is active, and what precautions are needed?
Hot-plugging a board with the 24LC64-I/ST on an active I2C bus risks latch-up or data corruption due to partial power-up states and floating SDA/SCL lines. The device lacks built-in hot-swap protection. To safely implement hot-plug, use I2C bus buffers with enable pins (e.g., PCA9515A) to isolate the EEPROM until power is stable, and ensure power sequencing brings VCC above 2.5V before I2C signals appear. Add series resistors (100–470Ω) on SDA/SCL lines to limit inrush current and suppress glitches. Always validate behavior with an oscilloscope during plug-in transients to confirm clean signal integrity.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
24LC64-I/ST CAD Models
Microchip Technology 24LC64-I/ST PCB symbols & footprints
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