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HomeProductsIntegrated Circuits (ICs)Specialized ICs24LC512T-E/ST
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24LC512T-E/ST - Microchip

Manufacturer Part Number
24LC512T-E/ST
Manufacturer
Microchip Technology
Allelco Part Number
41D-24LC512T-E/ST
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
10,080 pcs available, New & Original
Parts Description
TSSOP-8
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
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Our certification
In stock: 10080
  • Unit Price: $1.873
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $1.873 $1.87
10+ $1.828 $18.28
30+ $1.799 $53.97
100+ $1.77 $177.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

24LC512T-E/ST Tech Specifications
Microchip - 24LC512T-E/ST technical specifications, attributes, parameters and parts with similar specifications to Microchip - 24LC512T-E/ST

Product Attribute Attribute Value
Part Number 24LC512T-E/ST
Package TSSOP-8
Description TSSOP-8
Stock Condition Get 10080 pcs available quantity at Allelco
Payment PayPal / TT / Credit Card / Western Union
Allelco Certifications ESD / ISO 9001 / ISO 13485 / ISO 28000
Product Attribute Attribute Value
Manufacturer Microchip Technology
RoHs Status -
Warranty 100% Perfect Functions
Transport port Hong Kong
Shipping by DHL / FedEx / UPS / TNT / SF Express
RFQ Email info@allelco.com

Parts Introduction

Manufacturer Part Number

24LC512T-E/ST

Manufacturer

Microchip Technology

Introduction

The 24LC512T-E/ST is a 512Kbit (64K x 8) Electrically Erasable Programmable Read-Only Memory (EEPROM) with an I2C-compatible serial interface. It is designed for applications that require reliable, low-power, non-volatile data storage.

Product Features and Performance

Memory size: 512Kbit (64K x 8)

Memory type: Non-volatile EEPROM

Memory interface: I2C-compatible serial interface

Clock frequency: 400 kHz

Write cycle time: 5ms per word/page

Access time: 900 ns

Operating voltage: 2.5V to 5.5V

Operating temperature: -40°C to 125°C

Product Advantages

Reliable non-volatile data storage

Low power consumption

Simple I2C interface for easy integration

Wide operating voltage and temperature range

Key Reasons to Choose This Product

Robust and reliable EEPROM memory solution

Ideal for applications requiring secure and long-term data storage

Wide compatibility and easy integration into various systems

Cost-effective and energy-efficient design

Quality and Safety Features

Designed and manufactured to high quality standards

Robust and reliable performance

Meets safety and environmental regulations

Compatibility

Compatible with I2C-based systems and microcontrollers

Application Areas

Industrial automation and control systems

Consumer electronics

Automotive electronics

Metering and monitoring devices

Embedded systems and IoT applications

Product Lifecycle

For information on product discontinuation or alternative options, please contact our website's sales team.

Frequently Asked Questions(FAQ)

What is the maximum clock frequency supported by the 24LC512T-E/ST for reliable I2C communication, and how does this impact system design constraints?
The 24LC512T-E/ST supports a maximum I2C clock frequency of 400 kHz, which defines the upper bound for data transfer rates in systems using this EEPROM. This constraint necessitates that any microcontroller or host device must not exceed this frequency when communicating with the component. In practice, achieving full-speed operation depends on bus capacitance, pull-up resistor values, and PCB trace length. Exceeding 400 kHz may result in communication failures or data corruption, particularly over longer traces or with multiple devices sharing the bus. Designers must ensure timing budgets accommodate this limit, especially in time-sensitive applications.
How does the supply voltage range of 2.5V to 5.5V affect compatibility with common embedded systems, and what considerations arise when interfacing with 3.3V microcontrollers?
The 2.5V to 5.5V operating range of the 24LC512T-E/ST ensures broad compatibility with both legacy 5V logic systems and modern low-voltage designs such as those based on 3.3V microcontrollers. Since the device accepts down to 2.5V, it can operate reliably even when powered from a 3.3V supply without requiring level shifting. However, care must be taken during power-up sequencing to avoid undefined states if VCC ramps slowly. Additionally, noise margins at lower voltages may reduce immunity to transient disturbances, so decoupling capacitors are essential near the package pins.
What is the typical write cycle time for the 24LC512T-E/ST, and how does this influence real-time application performance?
The write cycle time for the 24LC512T-E/ST is specified as 5 ms per page (typically 64 bytes), which includes both byte and page write operations. This duration represents the minimum time required after initiating a write until the memory becomes ready for new commands. In real-time systems, this latency introduces blocking delays unless handled via interrupts or buffering. For example, writing 256 bytes would require at least two page writes totaling approximately 10 ms, potentially affecting responsiveness in event-driven architectures. Designers should factor this into task scheduling or implement wear-leveling strategies to distribute write cycles evenly across sectors.
Can the 24LC512T-E/ST be used in automotive-grade environments, given its temperature rating?
Yes, the 24LC512T-E/ST operates over an industrial temperature range of -40°C to 125°C, making it suitable for automotive and industrial applications where thermal extremes occur. While this exceeds basic commercial-grade requirements, compliance with AEC-Q100 is not explicitly stated by Microchip for this specific variant. Therefore, while functional in harsh environments, formal qualification for automotive use should be verified through additional reliability testing or selection of a certified automotive-grade alternative if required by safety-critical standards.
How many write cycles can the 24LC512T-E/ST endure before potential failure, and what factors accelerate wear?
The 24LC512T-E/ST is rated for a minimum of 1 million write cycles per memory location under normal operating conditions. However, actual endurance depends heavily on operating voltage, temperature, and write patterns. Frequent small writes increase wear compared to larger block updates due to internal erase-before-write mechanisms. For instance, continuously rewriting the same 64-byte sector every second could exhaust its life within three years, whereas infrequent large writes may extend longevity beyond decades. Implementing wear-leveling algorithms significantly enhances durability in logging or configuration storage roles.
What is the access time specification of the 24LC512T-E/ST, and how does it compare to read performance during random versus sequential operations?
The access time for the 24LC512T-E/ST is specified as 900 ns, which refers to the maximum delay from receiving a read command to valid data availability. This metric applies primarily to random access scenarios, such as reading individual configuration registers. Sequential reads benefit from internal prefetch mechanisms and do not incur repeated access penalties. Thus, while 900 ns reflects worst-case single-byte response, burst reads of consecutive addresses achieve much higher effective throughput—often limited more by I2C protocol overhead than intrinsic memory speed.
How does the 8-TSSOP package size affect board layout decisions compared to larger alternatives like SOIC-8?
The 8-TSSOP (0.173", 4.40mm width) package of the 24LC512T-E/ST offers a compact footprint ideal for space-constrained designs, enabling high-density layouts on PCBs. Compared to SOIC-8, it provides better thermal dissipation due to exposed pad characteristics and slightly improved solder joint reliability under mechanical stress. However, its smaller pin pitch demands tighter manufacturing tolerances to avoid soldering defects. Layout engineers should maintain adequate creepage distances and minimize trace lengths to preserve signal integrity, particularly for the SCL and SDA lines, to support stable I2C operation up to 400 kHz.
Are there known substitution options for the 24LC512T-E/ST, and how do they differ in electrical characteristics?
Substitutes such as R1EX24512BTAS0I#S0 and M24512-DRDW3TP/K offer similar functionality but may vary in key parameters. For instance, some STMicroelectronics-based variants (e.g., M24512-WDW6TP) support wider voltage ranges or enhanced ESD protection, while Renesas parts might include built-in security features. Always verify clock frequency compatibility, write cycle times, and package dimensions before substituting. Although functionally equivalent in many cases, subtle differences in hold time, rise time, or power-up behavior could impact interoperability in sensitive designs, necessitating validation against the target system’s timing diagrams.
What role does the Moisture Sensitivity Level (MSL) of 1 play in handling and storage of the 24LC512T-E/ST?
With an MSL rating of 1, the 24LC512T-E/ST is considered moisture-insensitive and can be stored indefinitely under ambient conditions without requiring dry packaging or bake-out procedures prior to reflow soldering. This simplifies inventory management and reduces handling costs in high-volume production environments. Nevertheless, standard JEDEC guidelines still recommend storing unpackaged components in controlled environments to prevent contamination, especially in cleanroom or medical applications where particulates could compromise long-term reliability.
How does the organization structure of 64K x 8 bits influence addressing and memory mapping in firmware?
The 24LC512T-E/ST organizes its 512Kbit capacity as 64K words of 8 bits each, enabling straightforward byte-addressable access via I2C. Firmware typically maps this space using 16-bit addresses, where the upper 16 bits select the chip (assuming single-device systems) and the lower 16 bits address individual bytes. This alignment simplifies buffer management and avoids misalignment issues during flash-to-EPROM transfers. However, developers must ensure that multi-byte data structures respect page boundaries (usually 64 bytes) to optimize write efficiency and minimize cycle count.
What precautions should be taken when powering the 24LC512T-E/ST to avoid unintended writes or corruption?
To prevent spurious writes during power transitions, the 24LC512T-E/ST requires stable VCC above the minimum threshold (2.5V). Brown-out conditions or slow ramp-up times may cause the device to enter an indeterminate state. Adding a small ceramic capacitor (e.g., 0.1 µF) close to the VCC pin mitigates transient dips. Additionally, holding the WP (Write Protect) pin high prevents accidental writes, while tying A0–A2 appropriately configures device addressing. Monitoring reset signals from the MCU can also help synchronize initialization sequences and avoid race conditions.
How does the I2C interface implementation differ between standard-mode and fast-mode devices when using the 24LC512T-E/ST?
As a 400 kHz-capable EEPROM, the 24LC512T-E/ST fully complies with Fast-Mode I2C specifications, allowing interoperability with both Standard-Mode (≤100 kHz) and Fast-Mode (>100 kHz) hosts. When connected to a Standard-Mode controller, it operates safely but at reduced throughput; conversely, pairing it with a Fast-Mode master enables optimal bandwidth utilization. Designers must ensure pull-up resistors meet the combined capacitance and voltage requirements of all bus participants, including the 24LC512T-E/ST, to maintain signal rise times compliant with I2C timing constraints.
What impact does the absence of a built-in write protection feature have on data security in unattended systems?
The 24LC512T-E/ST lacks internal hardware write protection beyond the optional external WP pin. In unattended systems, this increases vulnerability to accidental or malicious data modification unless supplemented with firmware-level safeguards. For critical configurations, implementing CRC checks, versioned headers, or dual-bank shadowing can detect tampering. Alternatively, selecting a variant with internal lock bits or encryption support (if available) may be preferable for applications requiring higher assurance, though such features are not present in the base 24LC512T-E/ST architecture.
How does the RoHS3 compliance status affect regulatory adherence in global markets?
The 24LC512T-E/ST’s RoHS3 compliance confirms exemption from hazardous substances like lead, mercury, and cadmium under Directive 2011/65/EU as amended, facilitating entry into European Union and other regulated markets. This eliminates the need for separate declarations of conformity for environmental compliance in most consumer and industrial electronics. However, designers should confirm that all ancillary components (e.g., connectors, cables) also meet regional regulations, as non-compliance elsewhere in the bill of materials can invalidate overall product certification.
What are the implications of the ECCN classification (EAR99) for international sourcing and export control?
Classified under ECCN EAR99, the 24LC512T-E/ST is generally subject to minimal export restrictions, meaning it does not require special licenses for shipment to most countries. This simplifies logistics for distributed engineering teams and global supply chains. Nonetheless, exporters should remain aware of evolving U.S. Commerce Department regulations, particularly regarding military or cryptography-related end-uses, even if the part itself lacks such capabilities. Maintaining accurate commercial invoices and avoiding misrepresentation remains prudent.
How does the access time of 900 ns compare to typical SRAM speeds, and what trade-offs justify using EEPROM instead?
At 900 ns access time, the 24LC512T-E/ST is significantly slower than modern SRAM devices (typically <100 ns). However, unlike volatile SRAM, it retains data without power and offers greater endurance (>1M cycles vs. often limited SRAM write specs). For non-volatile logging, parameter storage, or code shadowing, this trade-off is acceptable. In contrast, SRAM excels in active caching or stack operations where speed dominates. Choosing between them hinges on whether persistence or speed is the primary design driver.

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Customer Reviews

Evaluation: 10 Articles

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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Delivery Cost

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(Different time frame / countries / package size has different price.)

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  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
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Microchip

24LC512T-E/ST

Microchip
41D-24LC512T-E/ST

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