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Microchip Technology 24LC512T-E/SM
- Part No.:
- 24LC512T-E/SM
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
24LC512T-E/SM.pdf
- Description:
- IC EEPROM 512KBIT I2C 8SOIJ
- Quantity:
- Payment:
- Shipping:
Inventory:3,828
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Product details
Overview
24LC512T-E/SM 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 400 kHz max clock frequency, 1 µA standby current, and industrial/extended temperature support (–40°C to +125°C). It features hardware write-protection, 128-byte page write buffer, and Schmitt-trigger inputs for noise immunity in embedded control and data logging systems.
For engineers reviewing the 24LC512T-E/SM datasheet, 24LC512T-E/SM pinout, 24LC512T-E/SM application, or 24LC512T-E/SM equivalent, key selection criteria include VCC range compatibility (2.5–5.5V), extended-temperature operation (–40°C to +125°C), I²C bus timing at 400 kHz, WP pin behavior, and 8-lead SOIC (SM) package mechanical fit.
Technical Context
The 24LC512T-E/SM implements a two-wire I²C interface with open-drain SDA/SCL pins requiring external pull-ups, supports up to eight devices on one bus via A0–A2 address inputs, and uses internal address pointer logic for sequential reads across the full 64K address space. Its page write architecture buffers up to 128 bytes before initiating a self-timed 5 ms erase/write cycle.
Write protection is controlled solely by the WP pin state (VSS = enabled, VCC = disabled), sampled at the Stop bit of each write command; no software lock or register-based protection is present. The device employs Schmitt-trigger inputs and slope-controlled outputs to suppress ground bounce and improve noise immunity in electrically noisy environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.5V to 5.5V - defines minimum system supply voltage; incompatible with 1.7V–2.5V low-voltage designs supported by 24AA512/24FC512 |
| Max Clock Frequency | 400 kHz - limits I²C bus throughput; not rated for 1 MHz operation like 24FC512 | Temperature Range | –40°C to +125°C (Extended E-grade) - qualified for under-hood automotive and high-temp industrial use |
| Standby Current | 1 µA (I-temp), 5 µA (E-temp) - enables ultra-low-power battery-backed data retention |
| Page Write Buffer | 128 bytes - reduces write transaction count vs. byte writes; requires software boundary checking to avoid wraparound |
| Endurance & Retention | 1 million erase/write cycles, >200 years data retention - supports long-life field deployments without refresh |
| Write-Protection | Hardware-only via WP pin - no volatile or nonvolatile configuration registers; prevents accidental overwrites during power transitions |
Pinout & Package
24LC512T-E/SM is supplied in an 8-lead SOIC package (Microchip package code SM), 3.90 mm body width, standard JEDEC MS-012AC footprint. Pin 1 is top-left corner with notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip Address Input | LSB of 3-bit hardware address; sets device I²C client address (1010xx0) when hardwired to VSS/VCC |
| A1 | Chip Address Input | Middle bit of 3-bit hardware address; enables up to eight 24LC512T-E/SM devices on same I²C bus |
| A2 | Chip Address Input | MSB of 3-bit hardware address; must be stable before Start condition to ensure correct device selection |
| VSS | Ground Reference | Primary return path for all internal circuitry; must be low-impedance connection to system GND plane |
| SDA | Serial Data I/O | Open-drain bidirectional bus line; requires external pull-up resistor (2 kΩ typical for 400 kHz) |
| SCL | Serial Clock Input | Input-only clock line; synchronizes all I²C transfers; edge-sensitive, not level-sensitive |
| WP | Write-Protect Control | Active-high enable: tied to VCC blocks all writes but allows unlimited reads; sampled only at Stop bit |
| VCC | Power Supply | Single 2.5–5.5V supply; powers EEPROM array, I/O buffers, and internal HV generator for write operations |
Key Features
| Feature | Design Value |
|---|---|
| Extended Temperature Operation | Rated –40°C to +125°C (E-grade) - validated for automotive engine compartments and industrial motor drives |
| Hardware Write Protection | Dedicated WP pin with no software override - eliminates firmware bugs or reset glitches causing unintended writes |
| 128-Byte Page Write Buffer | Reduces I²C transaction overhead by 128× vs. byte writes - critical for burst logging of sensor arrays or calibration data |
| Schmitt Trigger Inputs | 50 mV hysteresis on SDA/SCL - rejects sub-50 ns noise spikes without external RC filtering |
| I²C Bus Compatibility | Fully compliant with Philips I²C specification (100/400 kHz modes) - interoperable with standard microcontroller I²C peripherals |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing calibrated sensor offsets, I/O mapping tables, and firmware update flags in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed infrequently during boot or maintenance; retains data across 10+ year equipment lifecycles. Use Value: 1M endurance and >200-year retention ensure zero field failures due to EEPROM wear-out; E-grade temp rating survives panel-mounted enclosures near motors. | Use Scenario: Saving seat position memory, mirror angle presets, and door lock status in automotive BCMs subjected to under-dash thermal cycling. IC Role / Device Role / Timing Role: Low-power, write-protected data logger synchronized to vehicle ignition cycles; WP pin tied to ignition-switched VCC for automatic lockout during runtime. Use Value: Hardware WP prevents corruption during brown-out events; 5 µA E-temp standby current extends battery drain life during vehicle sleep mode. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Holding per-pump calibration coefficients, dose history logs, and safety-critical fault records in Class II medical devices requiring regulatory traceability. IC Role / Device Role / Timing Role: Secure, tamper-evident storage with write-protection enforced at hardware level; accessed only during service mode via authenticated host MCU. Use Value: RoHS compliance and AEC-Q100 qualification meet ISO 13485 manufacturing requirements; 128-byte page writes accelerate calibration upload during production test. | Use Scenario: Storing encrypted firmware patch images and version metadata in utility-grade smart meters exposed to outdoor temperature extremes. IC Role / Device Role / Timing Role: Field-upgradable nonvolatile memory accessed over isolated RS-485 or PLC interface; operates reliably at –40°C ambient during winter deployment. Use Value: Extended temperature rating eliminates derating or external heating; 400 kHz I²C speed enables fast patch verification before activation. |
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/SM | Same die, Industrial (I) grade only (–40°C to +85°C); identical electrical specs and pinout | Not qualified for extended-temperature environments; unsuitable for under-hood or outdoor metering | Select 24LC512-I/SM only if ambient operating temperature stays ≤ +85°C and cost sensitivity outweighs future thermal margin needs |
| AT24C512BN-SH-T | 512 Kbit I²C EEPROM, 1.7–5.5V VCC, 1 MHz max clock, but only rated to +85°C; different pinout (SOIC-8 same, but internal address map differs) | Lacks extended temperature support; higher clock rate irrelevant if host MCU limits to 400 kHz; requires validation of A0–A2 addressing behavior | Choose AT24C512BN-SH-T only if 1.7V operation is mandatory and thermal environment is strictly controlled; verify WP pin timing against Microchip spec |
Compared with 24LC512-I/SM, the 24LC512T-E/SM adds extended temperature capability without trade-offs in speed or power; versus AT24C512BN-SH-T, it guarantees automotive-grade reliability and consistent I²C timing at 400 kHz across –40°C to +125°C, simplifying qualification testing.
Availability
24LC512T-E/SM 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 patch storage requiring stable component supply across multi-year production cycles.
Supply support for 24LC512T-E/SM 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 components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 24LC512 series belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-power, I²C-based nonvolatile data storage in automotive, industrial, and medical applications demanding extended temperature operation and AEC-Q100 qualification.
FAQ
What is the maximum I²C clock frequency supported by the 24LC512T-E/SM?
The 24LC512T-E/SM supports a maximum I²C clock frequency of 400 kHz across its full VCC range (2.5V–5.5V) and temperature range (–40°C to +125°C). It is not rated for 1 MHz operation - that capability is exclusive to the 24FC512 variant. Timing parameters such as THIGH, TLOW, and TR are specified for 400 kHz at VCC ≥ 2.5V in the DS20001754Q datasheet.
Does the 24LC512T-E/SM support 1.7V operation like the 24AA512?
No, the 24LC512T-E/SM does not support 1.7V operation. Its absolute minimum VCC is 2.5V, as confirmed in the Device Selection Table and Electrical Characteristics section of DS20001754Q. The 24AA512 and 24FC512 variants support down to 1.7V; using 24LC512T-E/SM below 2.5V violates specifications and may result in unreliable read/write behavior or data corruption.
How does the WP pin function on the 24LC512T-E/SM?
The WP (Write-Protect) pin on the 24LC512T-E/SM is a hardware-only control: when tied to VCC, all write operations (byte and page) are inhibited while reads remain fully functional; when tied to VSS, writes are enabled. The pin state is sampled only at the Stop bit of each write command - toggling WP during a write cycle has no effect. There is no software-configurable write protection.
What package type is used for the 24LC512T-E/SM?
The 24LC512T-E/SM uses an 8-lead SOIC package with 3.90 mm body width, designated by Microchip as package code "SM". This is a standard JEDEC MS-012AC outline, compatible with automated pick-and-place and reflow soldering. Pin 1 is located at the top-left corner adjacent to the package notch or dot marking.
Is the 24LC512T-E/SM AEC-Q100 qualified?
Yes, the 24LC512T-E/SM is AEC-Q100 qualified, as explicitly stated in the Features section of DS20001754Q. This qualification covers stress testing for temperature cycling, humidity, ESD, and other automotive-relevant reliability metrics, making it suitable for use in automotive body control modules, infotainment systems, and other vehicle subsystems requiring certified component reliability.
24LC512T-E/SM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- 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-SOIJ
24LC512T-E/SM FAQ
1.How can I place an order for 24LC512T-E/SM through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC512T-E/SM 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/SM reliable?
The price and inventory of 24LC512T-E/SM 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/SM is usually 5 days.
3.What payment methods are accepted for 24LC512T-E/SM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC512T-E/SM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC512T-E/SM?
24LC512T-E/SM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC512T-E/SM 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/SM?
For technical support, including 24LC512T-E/SM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC512T-E/SM requirements.
6.How does Aetrix verify that 24LC512T-E/SM is sourced from the original manufacturer or authorized distributors?
All 24LC512T-E/SM 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/SM meets industry standards.
7.What is the process for return or replacement of 24LC512T-E/SM?
All 24LC512T-E/SM units undergo pre-shipment inspection (PSI). If there is an issue with 24LC512T-E/SM, 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/SM part is unused and in its original packaging.
Return procedure for 24LC512T-E/SM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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