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Microchip Technology 24LC512T-E/ST

Name: 24LC512T-E/ST
Brand: Microchip Technology
SKU: 24LC512T-E/ST
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 24LC512T-E/ST

Manufacturer:: Microchip Technology

Category:: Memory

Package:: 8-TSSOP (0.173", 4.40mm Width)

Datasheet:: 24LC512T-E/ST.pdf

Description:: IC EEPROM 512KBIT I2C 8TSSOP

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Inventory:1,028

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Product details

Overview

24LC512T-E/ST from Microchip Technology Inc. is a 512 Kbit I²C-compatible serial EEPROM organized as 64K × 8-bit, operating from 2.5V to 5.5V with industrial and extended temperature support (–40°C to +125°C), 400 kHz max clock frequency, 128-byte page write buffer, and hardware write-protection via the WP pin - used for nonvolatile parameter storage in embedded control modules.

For engineers reviewing the 24LC512T-E/ST datasheet, 24LC512T-E/ST pinout, 24LC512T-E/ST application, or 24LC512T-E/ST equivalent, key selection criteria include VCC range compatibility (2.5–5.5V), E-temp qualification (–40°C to +125°C), SOIC-8 package footprint, I²C bus timing constraints at 400 kHz, and hardware write-protect implementation using the WP pin.

Technical Context

The 24LC512T-E/ST implements a two-wire I²C interface with Schmitt-trigger inputs on SDA and SCL for noise immunity, slope-controlled outputs to suppress ground bounce, and cascading support for up to eight devices on one bus using A0–A2 address pins. It uses an internal HV generator for EEPROM programming and features automatic address pointer incrementing during sequential reads.

Its memory architecture includes a 128-byte page write buffer enabling burst writes within a single physical page boundary, self-timed erase/write cycles (max 5 ms), and hardware-based write protection activated when WP = VCC. The device supports current-address, random, and sequential read modes with acknowledge polling for write-cycle completion detection.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	512 Kbit (64K × 8-bit) - provides sufficient nonvolatile storage for firmware configuration, calibration data, and event logs in resource-constrained systems.
VCC Operating Range	2.5V to 5.5V - ensures compatibility with standard 3.3V and 5V logic domains without level-shifting circuitry.
Max Clock Frequency	400 kHz - defines maximum I²C bus speed under all valid VCC conditions; enables deterministic timing for real-time parameter updates.
Page Write Buffer	128 bytes - allows efficient bulk writes without host-side buffering; requires software management to avoid crossing 128-byte page boundaries.
Write Endurance	1,000,000 cycles - guarantees long-term reliability for applications requiring frequent parameter updates, such as energy metering or industrial sensor calibration.
Data Retention	200 years - ensures stored configuration remains intact across product lifetime, even under extended high-temperature operation.
Temperature Range	–40°C to +125°C (Extended grade) - qualified for under-hood automotive, industrial motor drives, and outdoor telecom equipment.

Pinout & Package

24LC512T-E/ST is supplied in an 8-lead SOIC (Small Outline Integrated Circuit) package with standard 150-mil body width and gull-wing leads. Pin 1 is marked by a beveled corner or notch on the package top surface.

Pin/Terminal	Circuit Role	Design Meaning
A0	Chip Address Input	User-configurable LSB of 3-bit device address; enables up to eight 24LC512T-E/ST devices on same I²C bus when combined with A1 and A2.
A1	Chip Address Input	Middle bit of 3-bit device address; must be hard-wired to VSS or VCC to set static address; not dynamically controllable during operation.
A2	Chip Address Input	MSB of 3-bit device address; determines unique I²C client address (1010 A2 A1 A0 R/W) for multi-device bus topology.
VSS	Ground Reference	Primary return path for all internal circuits; must be connected to system ground plane with low-impedance trace to minimize noise coupling.
SDA	Serial Data I/O	Open-drain bidirectional bus line; requires external pull-up resistor (2 kΩ typical for 400 kHz); changes only during SCL low except for START/STOP conditions.
SCL	Serial Clock Input	Input-only clock line synchronized to host controller; rising edge samples SDA; falling edge permits SDA transitions; timing must meet THIGH/TLOW min/max per AC specs.
WP	Hardware Write-Protect	Active-high enable: tied to VCC disables all write operations (byte/page) while preserving read functionality; sampled at STOP condition of each write command.
VCC	Power Supply	Single-supply input for core logic and EEPROM array; bypass capacitor (0.1 µF ceramic) required near pin to stabilize voltage during write cycles.

Key Features

Feature	Design Value
Schmitt-trigger inputs on SDA/SCL	Provides ≥50 mV hysteresis (VHYS = 0.05×VCC) to reject noise spikes up to 50 ns, eliminating need for external filtering in electrically noisy environments.
Output slope control	Internally limits rise/fall times of SDA output to prevent ground bounce and EMI during switching, enabling reliable operation on shared PCB power planes.
128-byte page write buffer	Reduces host I²C transaction overhead by allowing up to 128 bytes to be loaded before initiating self-timed write cycle - improves effective write throughput by ~10× vs byte-write mode.
Hardware write-protection (WP)	Physically disables all write operations when WP = VCC, protecting critical configuration data from accidental overwrite or firmware corruption without software intervention.
ESD protection >4 kV	Meets HBM Class 2 requirements, enabling direct handling and board-level integration without additional transient suppression components.

Applications

Industrial PLC Configuration Storage	Automotive Body Control Module
Use Scenario: Storing calibrated sensor offsets, I/O mapping tables, and user-defined logic parameters in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile parameter register providing persistent storage accessible over I²C during power-up and runtime reconfiguration. Use Value: Enables field-upgradable configurations without requiring external microcontroller flash or battery-backed RAM; 200-year retention ensures data integrity across decades of operation.	Use Scenario: Saving seat position memory, mirror angle presets, and lighting profiles in automotive body control units (BCUs) compliant with AEC-Q100 Grade 1. IC Role / Device Role / Timing Role: Dedicated EEPROM for user preference storage, isolated from main MCU flash to prevent corruption during firmware updates. Use Value: Extended temperature rating (–40°C to +125°C) and AEC-Q100 qualification ensure reliable operation in under-dash environments subject to thermal cycling and vibration.
Medical Infusion Pump Calibration	Smart Energy Meter Firmware Settings
Use Scenario: Holding flow-rate calibration coefficients, alarm thresholds, and usage history logs in Class II medical devices requiring regulatory-compliant data persistence. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage element with hardware write-protection to prevent unauthorized modification of safety-critical parameters. Use Value: WP pin enables lock-down of calibration data post-manufacturing; 1M endurance supports daily recalibration cycles over 10+ years of clinical use.	Use Scenario: Storing tariff schedules, metering constants, and communication credentials in ANSI C12.22-compliant smart meters operating in utility substations. IC Role / Device Role / Timing Role: High-reliability nonvolatile memory interfaced directly to metrology SoC via I²C for secure parameter management. Use Value: 400 kHz I²C interface enables fast credential loading during commissioning; 2.5–5.5V operation matches wide-input DC-DC converter outputs common in meter power supplies.

Industrial PLC Configuration Storage

Automotive Body Control Module

Use Scenario: Storing calibrated sensor offsets, I/O mapping tables, and user-defined logic parameters in programmable logic controllers deployed in factory automation.

IC Role / Device Role / Timing Role: Nonvolatile parameter register providing persistent storage accessible over I²C during power-up and runtime reconfiguration.

Use Value: Enables field-upgradable configurations without requiring external microcontroller flash or battery-backed RAM; 200-year retention ensures data integrity across decades of operation.

Use Scenario: Saving seat position memory, mirror angle presets, and lighting profiles in automotive body control units (BCUs) compliant with AEC-Q100 Grade 1.

IC Role / Device Role / Timing Role: Dedicated EEPROM for user preference storage, isolated from main MCU flash to prevent corruption during firmware updates.

Use Value: Extended temperature rating (–40°C to +125°C) and AEC-Q100 qualification ensure reliable operation in under-dash environments subject to thermal cycling and vibration.

Medical Infusion Pump Calibration

Smart Energy Meter Firmware Settings

Use Scenario: Holding flow-rate calibration coefficients, alarm thresholds, and usage history logs in Class II medical devices requiring regulatory-compliant data persistence.

IC Role / Device Role / Timing Role: Secure, tamper-resistant storage element with hardware write-protection to prevent unauthorized modification of safety-critical parameters.

Use Value: WP pin enables lock-down of calibration data post-manufacturing; 1M endurance supports daily recalibration cycles over 10+ years of clinical use.

Use Scenario: Storing tariff schedules, metering constants, and communication credentials in ANSI C12.22-compliant smart meters operating in utility substations.

IC Role / Device Role / Timing Role: High-reliability nonvolatile memory interfaced directly to metrology SoC via I²C for secure parameter management.

Use Value: 400 kHz I²C interface enables fast credential loading during commissioning; 2.5–5.5V operation matches wide-input DC-DC converter outputs common in meter power supplies.

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
24LC512-I/SN	Same 512 Kbit capacity, SOIC-8 package, and 2.5–5.5V VCC range, but rated only for Industrial temperature (–40°C to +85°C).	Lacks Extended temperature qualification; unsuitable for under-hood or high-ambient industrial deployments.	Select when cost sensitivity outweighs extended temp requirement and ambient stays below +85°C.
AT24C512BN-SH-T	512 Kbit I²C EEPROM from Microchip (formerly Atmel); identical 2.5–5.5V range and 400 kHz speed, but uses different internal architecture and lacks AEC-Q100 qualification.	No automotive qualification; different endurance spec (400k cycles vs 1M); minor AC timing variations may require validation in timing-critical designs.	Use where AEC-Q100 is not mandated and existing AT24Cxx design heritage simplifies migration.

Compared with 24LC512-I/SN and AT24C512BN-SH-T, the 24LC512T-E/ST uniquely combines Extended temperature operation, AEC-Q100 qualification, and guaranteed 1M write cycles - making it the only option among the three suitable for automotive and harsh-environment industrial applications requiring long-term data integrity.

Availability

24LC512T-E/ST is available at Aetrix Electronics and suitable for industrial PLC configuration storage, automotive body control modules, medical infusion pump calibration, and smart energy meter firmware settings requiring stable component supply and long-term lifecycle support.

Supply support for 24LC512T-E/ST includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a leading provider of microcontrollers, analog, FPGA, and memory solutions, serving automotive, industrial, consumer, and communications markets with vertically integrated silicon and development tools.

The 24LC512T-E/ST belongs to Microchip's 24XX512 family of I²C serial EEPROMs, designed specifically for robust, low-power nonvolatile data storage in space- and power-constrained embedded systems requiring extended temperature operation and automotive qualification.

FAQ

What is the maximum I²C clock frequency supported by the 24LC512T-E/ST?

The 24LC512T-E/ST supports a maximum I²C clock frequency of 400 kHz across its full VCC range of 2.5V to 5.5V. This is confirmed in the Device Selection Table and AC Characteristics section of the official datasheet (DS20001754Q). Unlike the 24FC512 variant, the 24LC512T-E/ST does not support 1 MHz operation. Timing parameters such as THIGH, TLOW, and TR are specified accordingly for 400 kHz compliance.

Does the 24LC512T-E/ST have AEC-Q100 qualification?

Yes, the 24LC512T-E/ST is explicitly stated as "Automotive AEC-Q100 Qualified" in the Features section of the datasheet (DS20001754Q, page 1). This qualification applies to the Extended temperature grade (–40°C to +125°C), which matches the 'E' suffix in the part number. The device meets stress testing requirements for automotive applications including temperature cycling, humidity bias, and ESD.

What package type is used for the 24LC512T-E/ST?

The 24LC512T-E/ST uses an 8-lead SOIC (Small Outline Integrated Circuit) package, indicated by the 'ST' suffix in the part number per Microchip's packaging nomenclature table (DS20001754Q, page 15). This is a standard 150-mil body width surface-mount package with gull-wing leads, compatible with automated pick-and-place and reflow assembly processes.

How does the WP pin function on the 24LC512T-E/ST?

The WP (Write-Protect) pin on the 24LC512T-E/ST is a hardware-level enable that disables all write operations when pulled high to VCC. When WP = VSS, writes are enabled. The pin state is sampled at the STOP condition of each write command, and toggling WP after STOP has no effect on an ongoing write cycle. This provides fail-safe protection against unintended firmware or configuration corruption.

What is the page size and maximum write time for the 24LC512T-E/ST?

The 24LC512T-E/ST has a 128-byte page write buffer and a maximum page write time of 5 ms, as specified in the Features list and AC Characteristics table (Parameter TWC, DS20001754Q, page 5). This self-timed write cycle applies to both byte and page writes. The device does not require external timing control, and acknowledge polling can be used to detect completion.

24LC512T-E/ST Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 8-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: EEPROM

Technology:: EEPROM

Memory Size:: 512Kbit

Memory Organization:: 64K 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 ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-TSSOP

24LC512T-E/ST FAQ

1.How can I place an order for 24LC512T-E/ST through Aetrix?

Please submit a Request for Quotation (RFQ) for 24LC512T-E/ST on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 24LC512T-E/ST reliable?

The price and inventory of 24LC512T-E/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC512T-E/ST is usually 5 days.

3.What payment methods are accepted for 24LC512T-E/ST?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC512T-E/ST transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 24LC512T-E/ST?

24LC512T-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 24LC512T-E/ST order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 24LC512T-E/ST?

For technical support, including 24LC512T-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC512T-E/ST requirements.

6.How does Aetrix verify that 24LC512T-E/ST is sourced from the original manufacturer or authorized distributors?

All 24LC512T-E/ST products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 24LC512T-E/ST meets industry standards.

7.What is the process for return or replacement of 24LC512T-E/ST?

All 24LC512T-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC512T-E/ST, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 24LC512T-E/ST part is unused and in its original packaging.

Return procedure for 24LC512T-E/ST:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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