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Microchip Technology 24LC512T-I/ST16KVAO
- Part No.:
- 24LC512T-I/ST16KVAO
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC512T-I/ST16KVAO.pdf
- Description:
- IC EEPROM 512KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,818
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Product details
Overview
24LC512T-I/ST16KVAO from Microchip Technology Inc. is a 512 Kbit I²C-compatible serial EEPROM organized as 64K × 8-bit memory, operating from 2.5V to 5.5V with industrial temperature range (–40°C to +85°C), 400 kHz max clock frequency, and 128-byte page write buffer. It delivers low-power operation (400 µA active, 1 µA standby) and hardware write-protection via the WP pin for embedded system configuration storage.
For engineers reviewing the 24LC512T-I/ST16KVAO datasheet, 24LC512T-I/ST16KVAO pinout, 24LC512T-I/ST16KVAO application, or 24LC512T-I/ST16KVAO equivalent, this page provides verified electrical specs, package mapping to 8-lead SOIC (ST), functional pin roles, real-world use cases in industrial control and automotive subsystems, and two validated alternative parts with documented technical differences.
Technical Context
The 24LC512T-I/ST16KVAO implements a two-wire I²C interface with Schmitt-trigger inputs on SDA/SCL for noise immunity and slope-controlled outputs to suppress ground bounce. Its internal address counter supports current-address, random, and sequential reads across the full 512 Kbit address space (0x0000–0xFFFF).
Write operations include byte and page modes (up to 128 bytes per page), with self-timed erase/write cycles completing in ≤5 ms. The device uses cascaded addressing via A0–A2 pins to support up to eight devices on one bus, enabling up to 4 Mbit contiguous address expansion when software-managed.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (64K × 8-bit) - supports firmware parameter tables and calibration data storage without external address latching. |
| VCC Range | 2.5V to 5.5V - compatible with 3.3V and 5V logic systems; not operable below 2.5V. |
| Max Clock Frequency | 400 kHz - enables fast configuration writes while maintaining robustness on noisy industrial buses. |
| Page Write Buffer | 128 bytes - reduces I²C transaction overhead by batching writes; page boundaries align at 128-byte intervals (e.g., 0x0000–0x007F). |
| Endurance | 1,000,000 erase/write cycles - ensures reliable logging in telemetry or event-recording applications over product lifetime. |
| Data Retention | >200 years - guarantees nonvolatile storage integrity for long-lifecycle industrial equipment and automotive ECUs. |
| Temperature Range | Industrial: –40°C to +85°C - qualified for deployment in motor control modules, HVAC controllers, and factory automation nodes. |
Pinout & Package
24LC512T-I/ST16KVAO is packaged in an 8-lead SOIC (ST) with standard 150-mil body width and gull-wing leads. Pin 1 is marked with a notch or dot; pin numbering follows counterclockwise order from top-left corner when viewed from top.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip Address Input | User-configurable LSB of 3-bit device address; hardwired to VSS/VCC to select one of eight possible I²C addresses (1010xxx). |
| A1 | Chip Address Input | Middle bit of chip address; determines bus position in multi-device configurations (e.g., sensor hub + actuator EEPROM). |
| A2 | Chip Address Input | MSB of chip address; enables up to eight 24LC512T-I/ST16KVAO devices sharing one I²C bus without address conflict. |
| VSS | Ground Reference | Primary return path for all internal circuitry; must be connected to system GND with low-impedance trace. |
| SDA | Serial Data I/O | Open-drain bidirectional line requiring external pull-up (2–10 kΩ); carries address, command, and data bits under SCL control. |
| SCL | Serial Clock Input | Master-generated clock synchronizing all I²C transfers; rising edge samples SDA, falling edge allows SDA transitions. |
| WP | Hardware Write-Protect | Active-high enable: tied to VCC blocks all writes (including page and byte); tied to VSS permits full read/write access. |
| VCC | Power Supply | Single 2.5–5.5V supply powering EEPROM core and I/O buffers; decoupling capacitor (0.1 µF) required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt Trigger Inputs | Input hysteresis ≥0.05×VCC on SDA/SCL eliminates false triggering from EMI or slow-rising signals in industrial environments. |
| Output Slope Control | Controlled rise/fall times prevent ground bounce during high-speed switching, reducing signal integrity risk on shared PCB planes. |
| 128-Byte Page Write | Reduces I²C protocol overhead by up to 94% vs. byte writes for bulk updates (e.g., writing 128-byte calibration table in one Stop-initiated cycle). |
| Hardware Write-Protection | Physical WP pin disables writes without firmware intervention-critical for preventing accidental corruption of boot parameters or safety-critical settings. |
| 1 µA Standby Current | Enables always-on configuration storage in battery-backed systems (e.g., smart meters) with negligible drain over years of operation. |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing I/O mapping tables, PID tuning parameters, and user-defined alarm thresholds in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent system state between power cycles; accessed via I²C during controller boot and runtime reconfiguration. Use Value: Eliminates need for external microcontroller flash partitioning; enables field-upgradable settings without firmware reflashing or JTAG access. | Use Scenario: Retaining door lock status history, mirror position presets, and lighting profiles in automotive BCMs compliant with AEC-Q100 Grade 2. IC Role / Device Role / Timing Role: Dedicated EEPROM for user preference storage; isolated from main MCU flash to avoid wear-out and ensure deterministic access timing. Use Value: Supports >1M write cycles for frequent profile changes while maintaining >200-year data retention-meeting OEM infotainment lifecycle requirements. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Parameters |
Use Scenario: Storing calibrated flow rate coefficients, sensor offset values, and safety limit thresholds in Class II medical infusion pumps requiring traceable calibration records. IC Role / Device Role / Timing Role: Secure, write-protected memory block accessed only during calibration mode; WP pin hardwired to VCC after final validation. Use Value: Hardware-enforced write protection prevents unauthorized modification of critical dosage parameters-supporting ISO 13485 compliance. | Use Scenario: Holding tariff schedules, metering constants, and communication keys in ANSI C12.22-compliant smart electricity meters operating in utility substations. IC Role / Device Role / Timing Role: Tamper-resistant configuration store accessed during meter initialization and firmware OTA updates via secure I²C channel. Use Value: 2.5V minimum VCC ensures reliable operation during brownout conditions common in grid-edge deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA512-I/ST | Lower VCC min (1.7V), same 400 kHz max clock, identical 8-lead SOIC package and pinout. | Preferred for 1.8V/2.5V systems (e.g., portable diagnostics); not rated for 2.5V-only operation like 24LC512T-I/ST16KVAO. | Select 24AA512-I/ST only if supply voltage may dip below 2.5V; otherwise 24LC512T-I/ST16KVAO offers tighter VCC spec alignment. |
| AT24C512BN-SH-B | Same 512 Kbit size and I²C interface, but rated for 1.7–5.5V and 1 MHz clock; different pinout (A0/A1/A2 on pins 5/6/7 vs. 1/2/3). | Supports higher-speed buses and wider voltage range; requires PCB layout change due to non-identical pin assignment. | Choose AT24C512BN-SH-B only when 1 MHz throughput or sub-2.5V operation is mandatory and board revision is feasible. |
Compared with 24AA512-I/ST and AT24C512BN-SH-B, the 24LC512T-I/ST16KVAO provides optimal balance of industrial-grade reliability, strict 2.5V+ operation, and drop-in compatibility in existing 8-lead SOIC designs-making it ideal for cost-sensitive, volume-manufactured control systems where voltage rails are stable.
Availability
24LC512T-I/ST16KVAO is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, medical infusion pump calibration, and smart energy meter firmware parameter storage requiring stable component supply and long-term lifecycle support.
Supply support for 24LC512T-I/ST16KVAO 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 infrastructure.
The 24LC512T-I/ST16KVAO belongs to Microchip's 24XX512 family of I²C serial EEPROMs, engineered for robust nonvolatile data storage in industrial, automotive, and medical applications where reliability, low power, and hardware write protection are critical.
FAQ
What is the minimum supply voltage required for reliable operation of the 24LC512T-I/ST16KVAO?
The 24LC512T-I/ST16KVAO requires a minimum VCC of 2.5V for guaranteed operation across its full industrial temperature range (–40°C to +85°C). Operation below 2.5V is not specified and may result in undefined behavior, failed writes, or incomplete acknowledgments. This distinguishes it from the 24AA512 variant, which supports down to 1.7V.
Does the 24LC512T-I/ST16KVAO support 1 MHz I²C clock speed?
No, the 24LC512T-I/ST16KVAO is rated for a maximum clock frequency of 400 kHz under all valid operating conditions (2.5V ≤ VCC ≤ 5.5V). Unlike the 24FC512 variant, it does not support 1 MHz operation. Attempting 1 MHz signaling will violate AC timing specifications-including THIGH, TLOW, and TR-and likely cause communication failures or data corruption.
How many devices can be connected on the same I²C bus using the 24LC512T-I/ST16KVAO?
Up to eight 24LC512T-I/ST16KVAO devices can be connected on a single I²C bus using the three hardware address pins (A0, A1, A2), each configurable as logic high or low to generate unique 3-bit chip addresses (1010xxx). This enables scalable memory expansion up to 4 Mbit total capacity without additional address decoding logic.
What is the function of the WP pin on the 24LC512T-I/ST16KVAO, and how should it be used in production systems?
The WP (Write-Protect) pin on the 24LC512T-I/ST16KVAO disables all write operations-including byte, page, and erase-when held high (tied to VCC). In production, it is commonly hardwired to VCC after final calibration or firmware load to prevent accidental or malicious overwrites of critical configuration data stored in the 24LC512T-I/ST16KVAO.
What is the page size and write time specification for the 24LC512T-I/ST16KVAO?
The 24LC512T-I/ST16KVAO has a fixed page size of 128 bytes, and its maximum page write time is 5 ms. During this self-timed cycle, the device does not acknowledge I²C commands; host systems must use acknowledge polling (repeated Start + control byte) to detect completion before issuing subsequent operations.
24LC512T-I/ST16KVAO 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 ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24LC512T-I/ST16KVAO FAQ
1.How can I place an order for 24LC512T-I/ST16KVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC512T-I/ST16KVAO 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-I/ST16KVAO reliable?
The price and inventory of 24LC512T-I/ST16KVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC512T-I/ST16KVAO is usually 5 days.
3.What payment methods are accepted for 24LC512T-I/ST16KVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC512T-I/ST16KVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC512T-I/ST16KVAO?
24LC512T-I/ST16KVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC512T-I/ST16KVAO 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-I/ST16KVAO?
For technical support, including 24LC512T-I/ST16KVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC512T-I/ST16KVAO requirements.
6.How does Aetrix verify that 24LC512T-I/ST16KVAO is sourced from the original manufacturer or authorized distributors?
All 24LC512T-I/ST16KVAO 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-I/ST16KVAO meets industry standards.
7.What is the process for return or replacement of 24LC512T-I/ST16KVAO?
All 24LC512T-I/ST16KVAO units undergo pre-shipment inspection (PSI). If there is an issue with 24LC512T-I/ST16KVAO, 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-I/ST16KVAO part is unused and in its original packaging.
Return procedure for 24LC512T-I/ST16KVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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